A series of new Ni(II) poly-phosphinates have been synthesised using Ni(II) acetylacetonate as nickel precursor and a succession of ligands derived from phosphinic acid: ethyl-butyl-phosphinic acid, ethyl-butyl-thio-phosphinic acid, and respectively ethylbutyl-di-thio-phosphinic acid. Chemical analysis gel-chromatography, infrared spectroscopy (IR), spin electronic resonance (RES), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), electrical resistance measurements at different temper...
Autori: Daniel Sutiman, Doina Sibiescu, , Mircea Teodor Nechita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25118

AbstractElectrochemical impedance spectroscopy (EIS) measurements were used to characterize the electrochemical behaviour of the some commercial dental alloys: two PdAg based alloys (Paliag, PaliagMaestro), two NiCr based alloys (Wirolloy, VeraSoft), two CoCr based alloys (Vitallium, VeraPDI) and two CuAl based alloys (Gaudent, NPG+2) in artificial saliva. Impedance spectra were represented in the form of Bode plots and it was fitted using a commercial softwere package called Electrochemistry Po...
Autori: Daniel Mareci, Gina Ungureanu, Julia Claudia Mirza Rosca, Neculai Aelenei, Romeo Chelariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25143

AbstractThe aim of this work was to obtain Ag - doped zeolite as antibacterial material using natural and sodium form of zeolite from Mirsid Romania with the dimensions ranged between 0.8-1.2 mm. The comparative structural characterization of natural and Ag - doped zeolite were performed using Laser Induced Breakdown Spectroscopy (LIBS), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and Infrared Spectroscopy (IR). In addition, the ion exchange total ...
Autori: Aurel Iovi, Corina Orha, Cornelia Ratiu, Florica Manea, Georgeta Burtica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25220

AbstractBased on the polarization curves and electrochemical impedance spectroscopy (EIS) in the case of three commercial alloys (Wirolloy, NicromalSoft and VeraSoft) maintained in artificial saliva, it was established the type and the intensity of the corrosion process by means of the corrosion currents value. The passivation of all the samples occurred spontaneously at the open circuit potential. The corrosion currents value decrease after the alloys maintenance in the corrosive medium due the...
Autori: Daniel Mareci, Gina Ungureanu, Julia Claudia Mirza Rosca, Neculai Aelenei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25235

AbstractThe behaviour of three types of steel, with a variable carbon concentration (from 0.20 to 0.40 %) is studied in medium of ethylene glycol - 10 % methanol - 5 % succinic or adipic acid with water concentration varying between 1 % to 5 %. IR spectroscopy, Xray diffraction and chemical analysis were the methods used for corrosion compounds analysis. The weight losses were measured; also the polarization curves were plotted and the corrosion parameters were established. Based on the obtained...
Autori: Daniel Mareci, Daniel Sutiman, Ioan Iordache, Mircea Teodor Nechita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25240

AbstractThis paper presents an overview of research related to use of surfactant modified natural zeolites (SMZ) in water and wastewater treatment. The most common natural zeolite, widely used as starting material is clinoptilolite, but other natural zeolites have also been used (chabasite, heulandite, mordenite). In the first part, the preparation methods and the influence of process parameters on the final product properties is reviewed. The discussion is focused on the influence of surfactant...
Autori: , Cezar Catrinescu, Roxana Elena Apreutesei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25241

AbstractMesoporous Ti-SBA-15 materials have been synthesized up to a Si/Ti ratio of 20 using a two-step pH adjusting method. Low angle X-ray diffraction and diffuse reflectance UV-Vis spectroscopy revealed that the optimal pH value to synthesize highly ordered mesoporous solids having Ti atoms primarily in tetrahedral coordination environments is around 7.5. The nitrogen physisorption and TEM indicated also ordered mesostructures having relatively large surface areas and uniform mesopore size di...
Autori: Adrian Ungureanu, Alexandru Chirieac, Brindusa Dragoi, Cezar Catrinescu, Emil Dumitriu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25263

AbstractIn this paper, the study of synthesis and stability in aqueous solutions of new coordination compounds of Ti(IV) and Zr(IV) with ligand N-hydroxy-succinimide is presented. The salts: TiOSO4¡2H2O and ZrOCl2¡8H2O used for obtaining the studied coordination complexes, can derive from recycling metallic residues resulted in mechanical technologies applied for titanium and zirconium in S.C. ZIROM S.A. Giurgiu.The new complexes were synthesized in aqueous solutions and stability were study u...
Autori: Adrian Cailean, Daniel Sutiman, Doina Sibiescu, Gabriela Apostolescu, Ioan Roşca, Marian Crudu, Mihaela Vizitiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25265

AbstractThe corrosion resistance of three types of low-carbon steels in water-contaminated mixtures of adipic acid and methanol was investigated. The concentration of water in the organic mixture was progressively raised from 1% to 5%, while the carbon concentration in the steel samples varied from 2% to 4%. Infrared spectroscopy (IR) and X-ray diffraction (XRD) were used to investigate the insoluble corrosion products. Based on the weight losses measurements, on the polarization curves and on t...
Autori: Adrian Cailean, Daniel Mareci, Daniel Sutiman, Mircea Teodor Nechita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25287

AbstractThe electrochemical behaviour of Ti6Al4V and Ti6Al4Zr alloys has been evaluated in Ringer's solution at 250C. The effect of the substitution of vanadium in Ti6Al4V alloy has been specifically addressed. The evaluation of the corrosion resistance was carried out through the analysis of the open circuit potential variation with time, potentiodynamic polarization curves, and electrochemical impedance spectroscopy (EIS) tests. Very low current densities were obtained (order of nA/cm2) from t...
Autori: Adrian Cailean, Daniel Mareci, Daniel Sutiman, Igor Creţescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25334

AbstractTitanium alloys show attractive properties for biomedical applications where the most important factors are biocompatibility, corrosion resistance, low modulus of elasticity, very good strength-to-weight ratio, reasonable formability and osseointegration. The aim of present study was to evaluate the electrochemical behaviour of Ti6Al7Nb alloy in Ringer’s solution of different pH. This evaluation was carried out through the analysis of the potentiodynamic polarization curves, and electr...
Autori: Daniel Mareci, Julia Claudia Mirza Rosca, Marina Garcia Falcon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25363

Include urmatoarele articole:� Environmental Engineering and Management Journal, Vol. 8 Nr. 2� Bioengineering aspects of tissues culture bioreactors for medicine and environmental applications� Removal of bis (1-chloro-2-propyl) ether from wastewater using sonodegradation and biodegradation� A novel plasma reactor for toluene decomposition in contaminated air flow� Study of the copper (II) removal from aqueous solutions by chelating resin Purolite S930 � Analysis of some metal levels...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25371

� Physiological changes in seedling germination and growth plant under chemical stress conditions� Studies on sorption and transport processes of cadmium in soils� Assessment of the anthropogenic impact on water systems by fluorescence spectroscopy� Research on the effects of soil improvement by fertilization on the quality of winter wheat� Halotherapy: From ethnoscience to scientific explanations� Study regarding the sorption of erythrosine from aqueous solution onto soil� Hydroxy...
Autori:
ISSN: 1582 - 9596
http://www.ecozone.ro/reviste.php?RID=25375

AbstractThe quantification of heavy metals presence in the environment is a very important aspect regarding water quality control. The limits for those metals are very well established by Romanian laws and the essence of every validation report is to prove that the method, the apparatus and the operator can reach the established limits. In the present paper such a validation report is presented, proving the appropriate use of Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AE...
Autori: Irina Dumitriu, , Ioana Raluca Bunghez, Rodica - Mariana Ion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25380

Abstract The concentrations of some metallic ions (chromium, iron and copper) in Danube River water were determined by molecular absorption spectroscopy. There were studied five sites from Constanta County, in winter, spring and summer of 2008 year. The results can be interpreted having in view the natural and anthropical factors. The highest concentrations of metallic ions, which proved that some of water samples are of 5th quality class, were determined in winter. The quality of Danube Rive...
Autori: Anca Dumbrava,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25400

Abstract The preparation of microspheres containing chitosan, sodium alginate and ibuprofen and the pH dependent drug release were investigated. The microspheres were prepared by two experimental routes: the first one starting with a chitosan/ibuprofen core subsequently coated by an alginate shell (S1) and the second one based on an alginate/ibuprofen core, later coated by a chitosan layer (S2). The physical-chemical characterization was done by using Dynamic Light Scattering (DLS), Atomic Fo...
Autori: Luminiţa Elena Balău, Nicolae Aelenei, Marcel Ionel Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25412

Abstract A facile and straightforward synthesis route, based on the anionic clay structural â€?memory effect??, has been used to obtain Fe2O3 or CeO2 supported on iron substituted hydrotalcite-like clay (FeLDH). The surface properties of the metal oxide / anionic clay ensembles were studies by X-ray photoelectron spectroscopy (XPS). After calcination at 550°C the derived mixed oxides were tested as new catalysts in the process of the selective catalytic reduction (SCR) of NOx using NH3...
Autori: Gabriela Carja, Sofronia Dranca, Elena Husanu, Irina Volf
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25413

Abstract Study of geopolymer is a developing field of research for capitalizing solid waste and by-products in the view of new materials achievement having characteristics necessary for using as cement substitute. Also, it provides a solution to many problems regarding environment, such as reduction of gaseous emissions and particles matter resulted from cement industry and raw materials economy. In this paper, the experimental conditions for obtaining new materials on the basis of fly ash f...
Autori: Maria Harja, , Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25419

Abstract The aim of this study is to investigate the electrochemical behavior of a three casting non-precious dental alloys: Vera PDI (Co-Cr based), Heraenium (Ni-Cr based) and NPG+2 (Cu-Al based) three test solutions: artificial saliva (AFNOR, pH = 8), acidified saliva (pH = 2.5) and fluoridated acidified saliva (1000 ppm F-, pH = 2.5). Open circuit potential (EOC) measurement; potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) are the electrochemical proce...
Autori: Daniel Mareci, Daniel Sutiman, Adrian Cailean, Julia Claudia Mirza Rosca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25435

Abstract Changing fuel consumption to a more ecological environmentally alternative is replacing fossil fuels with fuels generated from renewable resources. Ethanol, a renewable fuel, can be produced mainly from crops, lignocellulosic biomass and different other environmental wastes. Although ethanol has been produced mainly from crops, there is a great interest in using cheaper lignocellulosic materials as a feedstock for ethanol production. The aim of this paper is study of dilute acid hyd...
Autori: Ionel Balcu, Adina-Elena Segneanu, Marius Constantin Mirica, Mirela Ioana Iorga, Corina Macarie, Raluca Martagiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25481

Abstract Preliminary investigation of contaminated soil in the surrounding area of a petroleum tank has been carried out based on fluorescence techniques: excitation emission matrix (EEM) and synchronous fluorescence scan (SFS). A fluorescence fingerprints library containing several EEM and SFS maps for various dilutions of Romanian crude oil in methanol, was used to confirm the identity of the soil contaminant. A calibration curve was created to estimate the contamination level of soil sampl...
Autori: Dan Savastru, Elfrida M. Carstea, Gabriela Pavelescu, Luminita Cristescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25505

Abstract The paper presents the surfactant-assisted solvo-thermal route to synthesize nanoparticles of cerium oxide with different shape and morphology. The precursor was calcined at 400°C for 4 h in order to obtain CeO2 nanoparticles. The obtained samples were characterized by means of thermal analysis and FTIR spectroscopy. The UV-Vis analysis was used to study the optical properties. The morphologies and nano-structures were characterized by scanning electron microscopy (SEM) and XRD. It...
Autori: Nicolae Apostolescu, Gabriela Carja, Gabriela Apostolescu, Elena Husanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25541

Abstract The aim of this work was to obtain ceria-based catalysts with improved oxidation properties by adding tin dioxide (5, 10 and 20 wt %) and using the co-precipitation method of preparation. The samples were characterized by BET, ESEM, and DRIFT spectroscopy. The activity of SnO2-CeO2 catalytic systems in CO oxidation was studied between room temperature to 673 K. It was found that the increase of SnO2 content obviously increases the low temperature CO conversion. However, at 673 K all ...
Autori: Tatiana Yuzhakova, , Monica Caldararu, Jozsef Kovacs, Anca Vasile, Georgeta Postole, Cristian Hornoiu, Endre Domokos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25565

Abstract Organic matter is ubiquitous in every type of aquatic system and due to the influence that it has on their ecological health, can be used as a useful water quality indicator. Fluorescence spectroscopy has been efficiently used in the past decades to determine and characterize organic matter, and its link to function and chemical water quality. In this paper, fluorescence fingerprints are presented in order to evidence the anthropogenic influence on different aquatic systems. Using f...
Autori: Elfrida M. Carstea, Luminita Ghervase, Gabriela Pavelescu, Dan Savastru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25576

Abstract Chlorophenols were selected for this study because most of them are toxic and difficult to biodegrade. They represent a particular group of priority toxic pollutants listed by the US EPA in the Clean Water Act and by the European Decision 2455/2001/EC. The efficiency of advanced oxidation processes for degradation of chlorophenols has been extensively documented. The catalytic wet hydrogen peroxide oxidation process, involving oxidation with H2O2 and solid catalysts in mild reaction ...
Autori: Brindusa Dragoi, , Cezar Catrinescu, Daniela Arsene
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25601

A series of sodium bentonites as raw material were prepared to the modified inorganic iron-nickel montmorillonites and organic composite montmorillonites. The structural characterization and morphology of the iron-nickel crosslinked modified bentonites were observed by means of IR spectroscopy, X-ray diffraction, scanning electron microscopy. The effects of the amount of bentonites, adsorption time and pH change on the adsorption of Cr(VI) have also been studied. The results indicated that the a...
Autori: Shao Hong, Cao Ninghttp://www.ecozone.ro/reviste.php?RID=25695

The paper analyses the removal efficiency and fluorescence spectroscopic characterization of landfill leachate dissolved organic matter (DOM) fractions in the combined stripping, fenton oxidation, sequence batch reactor, and coagulation process. The high contents of DOM of landfill leachate in each process unit were fractionated into HA, FA, and HyI. The result was the combined process availability for effective removal of DOM fractions. The removal rates for DOM, HA, FA and HyI were 91.9%, 97.1...
Autori: Zhiping Liu, Jin-song Guo, Fang Fanghttp://www.ecozone.ro/reviste.php?RID=25702

Abstract:In this paper, the influence of two types of imidazolium-based ionic liquids (ILs) on the properties of sycamore maple (Acer pseudoplatanus) veneers, at 25 0C, 60 0C and 80 0C has been studied by using contact angle measurements and Fourier transform infrared spectroscopy analysis. The measurements showed that wood wettabillity is increased by IL treatment. It has been determined that the ILs decrease the crystallinity and improve the flexibility of the cellulose matrix. Also, it has be...
Autori: Attila Porzsolt, Catalin Croitoru, Christian Friedrich, Silvia Patachia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25737

Abstract:The adsorption performance of a novel support for metal ions sorption and their removal from aqueous solutions was examined.The support is a new solvent-impregnated resin (SIR) which can be considered as an alternative adsorbent material capable ofselective sorption. The adsorbent was prepared by impregnating di-(2-ethylhexyl)-phosphoric acid (D2EHPA) onto AmberliteXAD7 resin beads, by dry impregnation method. The interaction between XAD7 resin and D2EHPA was evaluated by FTIRspectrosco...
Autori: Adina Negrea, Adriana Popa, Cornelia Muntean, Corneliu Davidescu, Lavinia Lupa, Mihaela Ciopec, Petru Negrea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25793

The purpose of this study was to prepare new nanocomposite catalysts of Metal/LDHs type by mild reduction of transition metal cations Co2+ and Cu2+ substituted in the matrix of ZnAl-LDH at 150°C and atmospheric pressure, under hydrogen flow. To this end, a series of ZnCuCoAl layered double hydroxides (LDH) precursors were synthesized by co-precipitation method. M2+/M3+ (i.e., Zn2+/Al3+) molar ratios were kept constant while the Cu2+/Co2+ molar ratios were varied in order to investigate their in...
Autori: Adrian Ungureanu, Alexandra Sasu, Alexandru Chirieac, Alina Moscu Corcodel, Brindusa Dragoi, Constantin Rudolf, Emil Dumitriu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25852

The aquatic species are permanently subjected to various stresses through the ecosystem and the food habit. Elucidating the impact at the cellular level allows us to understand the ways in which the polluting elements and their derivatives can disrupt the metabolism of aquatic organisms triggering apoptosis in individual cells or necrosis affecting groups of neighbouring cells. The aim of this preliminary study is to highlight the influence of the environmental factors on two fish population by ...
Autori: , Camelia Ureche, Dorel Ureche, Gabriel Lazar, Ileana Denisa Nistor, Irina Loredana Ifrim, Iuliana Mihaela Lazar, Marius Stamate, Valentin Nedeff
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25861

The present study describes the preparation of a filtering medium from a polymeric cellulosic support (filter paper) by functionalization with monochlorotriazinyl-β-cyclodextrin. The permanent immobilization of cyclodextrins confers the new material special properties and the potential for a better decontamination of liquid and gaseous effluents. The structure, physicomechanical and filtration properties of the filter paper, successfully functionalized with MCT-β-CD, have been emphasiz...
Autori: Ana-Maria Grigoriu, Constantin Luca, Florin Ciolacu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25862

The composite materials based on natural zeolite and undoped and N-doped TiO2, i.e., Z-Na-TiO2 and Z-Na-TiO2-N, were successfully synthesized by solid-state reaction in microwave-assisted hydrothermal conditions. Undoped TiO2 and N-doped TiO2 nanocrystals were previously synthesized by sol-gel method. The X-rays diffraction results of TiO2 nanocrystals indicated that anatase TiO2 is the dominant crystalline type. The composite materials were structural and morphological characterized by X-ray di...
Autori: Cornelia Bandas (Ratiu), Carmen Lazau, Paula Sfirloaga, Florica Manea, Rodica Pode
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25911

The synthesis of vanadium oxide systems (with 5 and 20 wt% V2O5 loadings) supported on commercial γ-alumina was carried out by a wet impregnation method. The samples were characterized by low-temperature nitrogen adsorption (BET), inductively coupled plasma (ICP) method and by in situ electrical conductance/capacitance measurements. The adsorption of CO was used to investigate the acidic properties of alumina support and V2O5/-Al2O3 catalysts by FTIR spectroscopy. The catalytic acti...
Autori: , Cristian Hornoiu, Mariana Scurtu, Monica Caldararu, Niculae I. Ionescu, Tatiana Yuzhakova, Veronica Bratan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25869

Fluorescence spectroscopy is a promising approach to the characterization of natural aquatic components and organic pollutants, due to its rapid analysis and high sensitivity. Petroleum products had been studied, using fluorescence technique, in numerous occasions, as seawater and soil contaminant or as raw sample. Nevertheless, no complex assessment has been made on fluorescence real–time spectra of freshwater diesel oil contamination. This study reports a 5–days experiment on an urban rive...
Autori: Elfrida M. Carstea, Gabriela Pavelescu, Luminita Ghervase, Marina Tautan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25882

Quantification of the floristic matrix is important both for animal’s nutrition and for the biodiversity monitoring of plants species under the influences of substance flow. Our researches have the main aim to study the possibilities offered by Infrared Spectroscopy in rapid, unpolluted and non-destructive analysis of floristic matrix modification from perennial grassland fertilized with organic and/or mineral fertilizers. It was performed three different FTIR models: for Poaceae (R2=0.949; RM...
Autori: Iosif Gergen, Moisuc Alexandru, Monica Harmanescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25892

AbstractIn this paper, we report a study on structural evolution, magnetic susceptibility and arsenic content of colloidal pyrite fromXinqiao deposits in Tongling, Anhui Province, China. The pyrite was treated under N2 atmosphere and charaterized with X-raypowder diffraction (XRD), field emission scanning electron microscopy (FE-SEM), magnetic susceptibility analysis, and atomicfluorescence spectroscopy (AFS). We observed that heating of colloidal pyrite in N2 atomosphere did not change the crys...
Autori: Dong Chen, Ping Li, Tianhu Chen, Xiao Zhu, Yadan Shi, Yan Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25951

AbstractA comparative study regarding the shape, dimension and bactericidal activity of the undoped and Ag-doped TiO2 nanocrystalswas achieved. In this way, two hydrothermal methods, classical hydrothermal and microwave-assisted hydrothermal, was usedfor nanoparticles synthesis. The obtained materials were investigated by X-ray diffraction, DRUV-VIS spectroscopy, BET andSEM/EDX analysis. Antibacterial activity of undoped and Ag-doped TiO2 materials was tested on real water from Bega River.The be...
Autori: Carmen Lazau, Corina Misca, Corina Orha, Cornelia Bandas, Sorin Olariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26034

AbstractWater quality is an inportant concern for the ecosystem state from a particular region. Since the continuous urban and economicdevelopment induces a negative impact on entire hydrological cycle, this study investigates the water quality of a Romanian lake,located in the Surduc area - Timis County. This perimeter has undergone significant economic development in the past twodecades due to increased tourism potential and the number of holiday residences.We proposed hybrid materias for the ...
Autori: Adina-Elena Segneanu, Cornelia Bandas, Florentina Cziple, Ioan Grozescu, Paula Sfîrloagă, Titus Slavici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26040

AbstractEight species of macromycetes which grow in phytocoenosis from “Călimani National Park” (Eastern Carpathians, Romania)have been analysed using Fourier Transform Infrared spectroscopy (FTIR). Among the analysed species, five species are beingconsidered edible (Clitopilus prunulus, Pleurotus eryngii, Macrolepiota rhacodes, Lacaria laccata and Suillus luteus) and threespecies are being considered toxic (Lyophyllum connatum, Paxillus involutus şi Gyromitra infula). The results of f...
Autori: Aurel Pui
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26091

Abstract This research has been performed during summer time at Iasi Atmosphere Optics, Spectroscopy and Lasers Laboratory site (LOA-SL), aerosol monitoring station (47.19N, 27.55E). In order to properly identify and characterize the aerosol types, Aerosol Robotic Network (AERONET) data and sun-photometer measurements were analysed using parameters such as: optical thickness, spectral dependence of Ĺngström exponent (α), spectral dependence of Single Scattering Albedo and the ...
Autori: Florin Unga
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26116

Abstract Our researches have focused primarily on variations of different biophysical and biochemical effects on vegetal and animal material at macro, micro, and ultra-micro scale resulted from changes in environmental condition. Growth and spectral parameters of rapeseed seedlings from seeds exposed to UVA-VIS radiation with a high pressure lamp which emits incoherent continuously radiation for different time periods were examined 14 days after germination. These studied parameter...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26138

Abstract Large amount of radioactive sources generate gamma rays of various energies and intensities. Gamma-ray spectroscopy is applied for the quantitative study of the energy spectra of gamma-ray sources. In the present paper, a statistical analysis of the energy spectra of gamma-ray spectroscopy monitored during 4 years at the “Dosimetry and Radioprotection” Laboratory from ”Vasile Alecsandri” University of Bacău is provided. Several new mathematical parameters were calcula...
Autori: Marius Stamate
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26144

AbstractThe reuse of a wastewater treatment system was investigated using intermittent media infiltration (IMI) to evaluate the fecalcoliform (FC) removal efficiency with natural zeolite containing clinoptilolite from the state of San Luis Potosí, Mexico and itszinc-modified form (Zeo-Zn). The municipal wastewater, which was from Saltillo, Coahuila, Mexico, was treated for FC analysisfor four months. The physicochemical properties of zeolite were analyzed, and their behavior as filter media for ...
Autori: Sasirot Khamkure
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26212

AbstractIn this study, changes induced in milk processed at ultra high temperature (UHT) were investigated following exposure to UVand white-light, by employing fluorescence spectroscopy. Two important indicators, namely Riboflavin (Rb) and vitamin A,were monitored to evaluate the light-induced damage in milk. It was noticed that the photo-degradation of Rb is due to thephotochemical decomposition and photosensitization. Moreover, it was found that the wavelength of the exposure light has agreat...
Autori: Maria Iliut
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26241

AbstractThe intercalation of 2,6-dichlorobenzonitrile (DBN) into the NiMgAlLDH, CuMgAlLDH and MgAlLDH layered doublehydroxides was carried out using the calcination-rehydration reaction using NiMgAl, CuMgAl and MgAl oxide precursors,obtained by calcination at 550oC. X-ray diffraction (XRD), elemental analysis, infrared spectroscopy (FTIR) andthermogravimetric analysis (TG-DTG) confirmed that DBN molecules were successfully intercalated into the interlayer spaces ofLDHs. The resulting solid produ...
Autori: Mihaela Silion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26244

AbstractInvestigations on thermochemical transformation of asbestos fibers followed by computer aided image analysis are presented.Asbestos Containing Wastes (ACW), notably asbestos-cement, were characterized before and after microwave heating withadditives aimed at reacting with and transforming asbestos fibers. Microprobe analysis helped determine the chemicalcompositions. X ray diffraction (XRD) was used to confirm decomposition of asbestos fibers during microwave heating. Electronparamagneti...
Autori: Yan Yvon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26256

AbstractThe aim of this study is to elaborate a survey on the efficiency of three anti-aging cosmetic formulations by applying FourierTransform Infrared Spectroscopy (FTIR) with Attenuated Total Reflection (ATR) in order to characterize and identify thespecific recognition markers of the active ingredients. FTIR (ATR) spectrometry in specific regions was applied also to theingredients used in these products, depending on their role in the specific cream. Comparing the different composition of th...
Autori: Anca Maria Juncan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26261

AbstractThis paper discussed the potential ecological risk, homologous relativity and spatial distribution of heavy metals in the waterlevel-fluctuating zone (WLFZ) of the Xiao River, a tributary of the Yangtze River. The Cd, Cu, Pb and Zn contents in the WLFZsoil were analyzed via atomic absorption spectroscopy. The potential ecological hazards of the heavy metals were also evaluatedusing the classical Lars Hakanson potential ecological risk index method. The average Cd, Cu, Pb and Zn contents ...
Autori: Chuan Fu, Dan Liu, Junjie Lin, Zhiguo Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26346

AbstractEvaluation of radon concentration is a very difficult task and a very important issue, in relation to the protection of human health.This is especially the case when there is an increase in concentration of radon on a deterministic basis, as is the case of nearbyphosphogypsum residues or geological characteristics. Radon gaseous that can be found in the environment occurs mainly fromnatural radioactive decay chains. The gamma ray spectroscopy is a powerful tool in order to monitor the en...
Autori: Marius Stamate
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26441

AbstractA series of experiments were performed to quantify the adsorption of Cesium on Silica impregnated withtrihexyl(tetradecyl)phosphonium chloride (Cyphos IL-101). Non-radioactive cesium solution was used as a surrogate of theradioactive 137Cs. The obtained impregnated Silica with the studied ionic liquid was characterized through scanning electronmicroscopy, energy dispersive X-ray analysis and Fourier transform infrared spectroscopy in order to put in evidence that theimpregnation with the...
Autori: Adina Negrea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26473

AbstractWater samples from two types of sources: partially treated sewage generated by a medium-sized city, with a high quantity oftotal coliforms and partially treated industrial wastewater, which contained mostly petroleum products from refineries, weretreated using the same concentration of TiO2 catalyst, for different exposure periods. UV-Vis and fluorescence spectroscopicevaluation of the composition changes of wastewaters under non selective oxidation conditions (achieved by photocatalysis...
Autori: Gabriela Pavelescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26474

AbstractFluorescence spectroscopy and parallel factor (PARAFAC) form a powerful tool in separating different fluorophores and maybe useful in detecting the fluorescent signature of dissolved organic matter (DOM). Despite the large number of studies onfluorescence and PARAFAC it is still uncertain if this combination is capable to separate DOM from different water types byanalyzing the presence of specific components and their spectral shape. This paper presents a preliminary study on thefluoresc...
Autori: Elfrida M. Carstea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26495

AbstractThe adsorption potential of 10 wt.% COOH/TUD-1 material for removing Cd2+ from aqueous solutions was investigated via thebatch technique, and the effects of pH, temperature and contact time were studied. Experimental data showed that the maximumCd2+ adsorption, 90%, occurred at pH 6. The adsorption equilibrium was reached within 35 min for 10 wt.% COOH/TUD-1. Theadsorption mechanism was investigated in terms of its thermodynamics and kinetics. The adsorption data were fitted using theLan...
Autori: Nabila Bensacia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26558

AbstractGraphene oxide (GO) was prepared from expandable graphite by a modified Hummers’ method and characterized by TEM,XRD, FTIR, and Raman spectroscopy. The batch adsorption experiments were carried out to study the effect of variousparameters, such as the initial concentration, adsorbent dosage, initial pH, contact time and temperature on adsorption propertiesof cationic red X-GRL onto GO. The Langmuir and Freundlich models were used to fit the experimental data of adsorptionisotherms. The k...
Autori: Jiankun Sun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26570

Abstract Heavy metals, such as Cr (chromium), have received attention during recent years due to their disposal in soil and water. Brave peanut (Pterogyne nitens Tul.), a tropical tree, was cultivated in 500 mol L-1 Cr+6 to observe how this species responds to this stress, with a view to its possible application in the restoration of degraded areas. In the present study, we report the use of a new method, photoacoustic spectroscopy, to evaluate the emission of CO2 and ethylene and th...
Autori: Luisa Brito Paiva
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26602

Abstract This study examined the characteristics of geopolymer with solar panel waste glass. After 28 days of curing, the compressive strengths of the geopolymer samples containing 10 mass % and 20 mass % solar panel waste glass were 63.3± 1.8 and 49.1 ± 2.2 MPa, respectively. The geopolymer sample with 10% solar panel waste glass exhibited a stronger reaction than that with 20% solar panel waste glass, and the strength decreased as the amount of solar panel waste glass increas...
Autori: HuiCong Hao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26621

Abstract Co(II), Cd(II) and Rh(III) complexes with 2-(1H-1,2,4-triazol-3-yl)pyridine (Htzp) as ligand were synthesized and investigated. The neutral mononuclear complexes with a generic [M(tzp)n] structure have been prepared from Htzp and corresponding transition metals chlorides at 2:1 and 3:1, respectively molar ratios in H2O–EtOH. The resulted crystalline complexes were investigated through magnetic and molar conductivity measurements, elemental analysis, FT-IR, mass spectroscopy, t...
Autori: Petronela Horlescu
ISSN: 1
http://www.ecozone.ro/reviste.php?RID=26652

Abstract A new catalytic mixture of nanosized dioxide (CeO2) and zinc oxide (ZnO) powders have been synthesized by surfactant-assisted solvo-thermal route, characterized and evaluated for photocatalytic activity. The prepared catalysts were characterized by TG, XRD, SEM and EDAX methods. SEM analysis showed that the catalyst particles have spheroidal shape and their sizes range from 50 to 80 nm, organised as uniform distributed aggregates with large surface area, leading to the existence of ...
Autori: Gabriela Antoaneta Apostolescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26655

Abstract The present work investigates the performance of Cristal-RightTM CR100 zeolite based on the equilibrium and thermodynamics water softening process. The commercial zeolite was characterized by scanning electron microscopy combined with energy dispersive X-ray spectroscopy and FT-IR spectroscopy. The equilibrium performances of zeolite were evaluated by the sorption capacity of calcium cations from calcium chloride solutions varying the calcium concentrations corresponding to moderate...
Autori: Liliana Lazăr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26670

Abstract The present research reports the synthesis of poly-N-isopropylacrylamide / mesoporous carbon composites, prepared by radical polymerization of N-isopropylacrylamide inside mesoporous carbon pores functionalized with carboxylic groups. The deposition of poly-N-isopropylacrylamide on mesoporous carbon was confirmed by FT-IR spectroscopy, TEM, N2-sorption measurements. The mesoporous carbon material was found to adsorb vitamin B2 from aqueous solution at room temperature. The obtained ...
Autori: Maria Ignat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26679

Abstract The bismuth oxide (Bi2O3) nanoparticles are easily synthesized from a solution of bismuth nitrate pentahydrate (Bi(NO3)3·5H2O) in ethylene glycol by a hydrolysis solvothermal route at temperatures of 120-150C. X-ray diffraction, scanning electron microscopy and UV-visible diffuse reflectance spectroscopy are used to characterize the products. The results show that the reaction temperature, the reaction duration and the initial solution concentration play important rol...
Autori: Xiaowen Luan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26689

Abstract Locally sourced clay from Kuala-Kangsar town in Perak state Malaysia was used in both its raw (RKKC) and modified (MKKC) form as adsorbents for the removal of methylene blue (MB) from synthetic textile wastewater in batch adsorption process. The raw clay was modified through H2SO4 acid treatment, Al(OH)3 ion exchange, calcinations and then molded into beads before freeze drying. The BET surface areas of RKKC and MKKC were 11 and 100 m2/g, respectively; their elemental analysis and ...
Autori: Manase Auta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26717

Abstract Chitosan and keratin were tested as low cost biosorbents to remove phenol from water solutions at variable temperature (20- 50°C), initial phenol concentration (10-90 mg L-1) and pH (5.0-10.0), and fixed biosorbent dosage (10 g L-1). The pseudo-second order kinetic model exhibited the best fit to the experimental data and allowed estimating theoretical values of sorption capacity of 4.51 mg g-1 with keratin and 2.87 mg g-1 with chitosan. Equilibrium isotherms, described at best ...
Autori: Attilio Converti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26743

Abstract MFe2O4 nanopowders (M = Ni, Co, Cu) were prepared using the precursor technique, starting from the corresponding metal nitrates and poly(vinyl alcohol)-PVA. During the heating of metal nitrates- PVA solution, a redox reaction takes place around 150°C, leading to the formation of M(II) and Fe(III) carboxylates. These compounds were used as precursors for the ferrites nanopowders. The desired ferrites were obtained by thermal decomposition of the carboxylates; the obtained...
Autori: Marcela Stoia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26745

Abstract In this study, the comparative photocatalytic activities of undoped and N-doped TiO2 anatase nanocrystals towards the degradation of Reactive Yellow 125 (RY125) azo reactive dye in aqueous solutions under UV and VIS irradiation ranges were investigated. Both nanocrystals prepared by a fast-hydrothermal method using titanium isopropoxide as precursor were characterized morpho-structurally by X-ray diffraction, SEM/EDX analysis and BET measurements. Also, optical features of the nano...
Autori: Corina Orha
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26757

Abstract The feasibility of treating tannery wastewater having high organic loads was studied using ceramic membrane based microfiltration process. The common effluent treatment plant (CETP) of a centralized leather complex was selected for the study which accommodates about 450 tanneries in the city, processing hides from raw to finished products. Effluent sample was collected from different locations of the CETP, i.e. untreated composite effluent, effluent from primary clarifier and from ...
Autori: Priyankari Bhattacharya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26837

Abstract In the present study, several selected formulations based on recycled (rPP) or virgin polyolefins (vPP) and lignocelluloses were prepared and subjected to microorganism attack. Biodegradation tests were performed with microbial strains belonging to fungal genera, like Aspergillus, Penicillium and Fusarium. The initiation of biodegradation was demonstrated by Scanning Electron Microscope (SEM) micrographs showing the colonization of surface samples by microbial strains. The crystalli...
Autori: Luiza Jecu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26879

Abstract The CoCrMo alloys have been widely used in artificial knee or hip joints. It is well known that these materials have a good corrosion resistance and acceptable biocompatibility properties. Zirconia as a ceramic biomaterial facilitates the osteoconductivity and tissue osteogenetic capacity in new bone formation around implant. Linear polarization and electrochemical impedance spectroscopy (EIS) were employed to characterize the electrochemical behavior of plasma sprayed yttrium oxid...
Autori: Manuela Romaş
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26896

Abstract The possibility to use release controlled fertilizers in the agriculture of the tropical countries is more important than in the agriculture of the countries of the cold regions. In this context, the purpose of this work is the characterization of an encapsulated commercial Fertilizer of Controlled Release named FERLENT®, which was covered with a polymeric material, obtained in situ, under controlled conditions, which allowed to corroborate the fairly well adjustment of the synt...
Autori: Mayra González Hurtado
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26916

In this work biodegradation of basic fuchsin and methyl red by the blue green algae Hydrocoleum oligotrichum and Oscillatoria limnetica was investigated. The degradation of basic fuschin after 7 days by H. oligotrichum and O. limnetica was 92.44% and 90.23%, respectively. On the other hand, the degradation of methyl red by H. oligotrichum and O. limnetica after 7 days was 53.23% and 50.18%, respectively. The degradation of these dyes by algae seems to be related to the molecular structures of...
Autori: Ghada W. Abou-El-Souod
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26949

Various plants were investigated here as bioindicators for control of the environment. Grass, moss and leaves of maple, birch and oak from different locations, i.e., mining, chemical industrial sites and open green area in a small industrial town in the southwestern Poland (Zloty Stok) were examined. Concentrations of As, Ba, Ca, Cd, Co, Cr, Cu, Fe, Hg, Mg, Mn, Ni, Pb, Se, Sr, Ti, V and Zn were measured by the ICP-OES and CVG-ICP-OES techniques. Infrared spectroscopy (FT-IR) was used to inves...
Autori: Lukasz Zarebski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26951

Cameroon's coast that is located in the Guinea Gulf oil region was exposed to hydrocarbon pollution due to oil exploitations and other petroleum activities. The intrinsic biodegradation of hydrocarbons is essential for the depollution methods of the marine environment. Nevertheless, these do not represent a common practice in Cameroon. This study aimed to assess the capacity of bacteria of Cameroon’s waters coast to degrade gasoline and diesel. The kinetic degradation of gasoline an...
Autori: Lucie Leme Banock
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26983

In the present study, the effects of two methods for thermal sanitization of soil, by oven and by autoclave, and two non-ionizing radiation sterilization methods, UVC and microwave on pH, conductivity, dry weight, total number of germs and respiration of samples from neutral commercial soil were evaluated, using international standard methods. Also, the infrared and UV-VIS spectroscopy were applied for the determination of chemical properties and structural characterization of humic acid and ...
Autori: Dumitra Raducanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26985

Biomass is a very important source for the production of biofuels. During the hydrolysis step of the process for obtaining biofuels the rate of decomposition of biomass is strictly related to its organic matter content and the operating mode of the facilities. This paper highlights the effect of different pretreatments on the composition of biomass at the molecular level using Fourier Transform Infrared Spectroscopy (FTIR) and Principal Component Analysis (PCA). For this experiment, a mixture...
Autori: Andreea Cocarcea Rusei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26986

In this study the immobilized waste black tea (Camellia synensis) was used as biosorbent for the removal and recovery of Al(III) and Cr(VI) ions from the synthetic aqueous solutions. Batch experiments were conducted to optimize the various biosorption parameters that affect the biosorption capacity of immobilized waste black tea. Maximum biosorption capacity was found with a biosorbent dose of 0.1g/100 mL for both metal ions. Optimum biosorption capacity for both Al(III) and Cr(VI) ions was o...
Autori: Haq Nawaz Bhatti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27004

Fly ash is the major residue produced during the combustion of coal. Research has been carried out to recover silica and alumina from fly ashes collected from different thermal power plants in India. Silica and alumina from the fly ash were recovered and the recovered products were subjected to X-ray diffraction, X-ray fluorescence and Inductively Coupled Plasma-Optical Emission Spectroscopy analyses to estimate the silica and alumina content. Total recovered silica content in the samples was...
Autori: Ruth Sherly Endluri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27007

Zirconia (ZrO2) as a ceramic biomaterial facilitates the osteoconductivity in new bone formation around implant. Surface characterization before and after electrochemical testing was performed used scanning electron microscopy (SEM). The electrochemical properties of the yttrium oxide stabilized zirconium oxide (YSZ) coated and uncoated MgCa sample with the open circuit potential at different immersion time in Ringer’s solution were studied by electrochemical impedance spectroscopy (EI...
Autori: Bogdan Istrate
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27021

This paper reports the potential of rice husk waste biomass to remove copper (II) from simulated wastewater under different experimental conditions. For this, rice husk has been pre–treated by boiling, formaldehyde and concentrated sulphuric acid. Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Energy dispersive analysis X–ray analyses were performed before and after adsorption, to explore number and position of the functional groups available for copper ...
Autori: Manjeet Bansal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27095

In this study, the impact of silicate admixture in 2-line ferrihydrite on its sorption properties is presented. Synthetic ferrihydrites with broad Si content in the range of 0 to 1.5 Si/Fe molar ratios were prepared and characterized using X-ray diffractometry (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM-EDS). With an increase in the Si/Fe ratio, a typical XRD peak at 2.5Å broadens and shifts toward 3 Å; the position of Si-O stretchi...
Autori: Gabriela Pieczara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27140

Waste from a cola beverage industry containing high concentration of phosphorus (P) was treated by the struvite precipitation method. The influence of excess of ammonia and order of reagent addition were evaluated as independent variables on the removal and recovery of phosphorus from cola beverage waste. It was removed about 95% of P of the sample in a short reaction time. The precipitated crystals were identified and analyzed by X-ray Diffraction (XRD), infra-red spectroscopy (IR) and surface ...
Autori: Wilson Roberto Barreto dos Santos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27188

Catalysts based on nanocrystalline Mg-Zn ferrites supported on commercial alumina were prepared by in situ sol-gel auto-combustion technique. The as-obtained materials were characterized using Fourier Transform Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD), atomic force microscopy (AFM) and Brunauer-Emmett-Teller (BET) specific surface area measurement. These materials were tested as catalysts for hydrogen peroxide decomposition and phenol oxidation reactions. The catalytic activity of ...
Autori: Tamara Slatineanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27192

Date pits were used as a low-cost adsorbent to study the effective removal of copper (II) ions in an aqueous solution on the basis of adsorption kinetics and isotherm equations. Before and after the adsorption process, the date pits were characterized by electron scanning microscope (ESM) as well as Infrared spectroscopy (IR). The effects of the pH, zero point of charge, the adsorbent mass, and the adsorbent particle size on the adsorption of copper (II) were also studied. Equilibrium data were ...
Autori: Tarek E. Khalil
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27212

In this study, silica gel initially reacted with N-(2-aminoethyl)-3-aminopropyl-triethoxysilane and subsequently with formaldehyde resulted in a modified solid that contained amino imine groups, Sil2NCH2. The solids were characterized by CHN elemental analysis, thermogravimetric analysis (TGA/DTG), FTIR spectroscopy, 13C solid-state NMR, and nitrogen adsorption/desorption measurements. The adsorption of Cd(II), Pb(II) and Cr(VI) ions onto Sil2NCH2 in aqueous solutions were examined to study the ...
Autori: Franklin Pessoa Aguiar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27242

In this study was synthesized MCM-41 mesoporous silica by hydrothermal treatment and funtionalized with titanium in order to obtain mesoporous materials with high surfacea area and photocatalytic activity in photodegradation of organic compounds as antibiotics. The functionalization of the synthesized support material was achieved by impregnation from alcoholic solution. The obtained materials (MCM-41) and (Ti-MCM-41) were characterized by X-ray diffraction (XRD), scanning electron microscopy (S...
Autori: Cristina Orbeci
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27274

This study presents the results obtained in tailoring thin films of alumina, deposited onto aluminium substrates by spray pyrolysis, at 250°C, using AlCl3 solutions (0.15M) in a water:ethanol (1:1) solvent mixture. As morphology controlling agents, acetylacetone and maleic acid based copolymers are added in the precursors’ solutions. The precursors’ systems are analyzed by FTIR spectroscopy and the surface morphology of alumina thin films is investigated by atomic force microscop...
Autori: Luminita Isac
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27291

Paintings signed by Nicolae Grigorescu and Stefan Luchian, exponents of Romanian Modern Art were selected for a technical study on easel painting canvases. Both the physical integrity and the appearance of the artefacts derive mainly from the strength of the canvas and the physical and chemical characteristics of the fibres imparting their response to deterioration. In order to determine a deterioration pattern for canvases subjected to environmental stress, a simulation on flax fibres samples w...
Autori: Maria Geba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27292

In the current context of industrialization, chemical and radioactive pollution is a concern for environmental protection and interference with human health. Care for environmental protection also includes vegetation that grows spontaneously in potentially contaminated places, thus avoiding illness among the population if consumed. The study area is located at 4.5km SSE from downtown Bacău City, Romania and is the result of the manufacture of H3PO4 through the wet method. In this study, t...
Autori: Mioara Săndulache Rachieru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27331

The objective of this study was to develop a naturally dyeing process of 70% wool /30% Angora mohair blended yarns by using bio-mordants as an environmentally friendly alternative for the conventional metallic salts. Bio-mordanting operation was achieved by using of condensed tannin extract from quebracho bark trees. Conventional mordanting has been performed using the conventional mordants like copper sulphate and tin chloride. Another specific objective of this study was to investigate the pos...
Autori: Ioana Stanculescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27337

Two montmorillonitic clays were modified with N-(methoxy-polyethylene glycol) ethylene diamine and tested as sorbents for removal of Rare Earths (REs) from aqueous solutions. Lanthanum was chosen as representing element of REs family and adsorption tests were performed with the aim of selecting a system with good uptake efficiency for the pollutant abatement in wastewaters. The effects of pH were studied and the properties of the obtained final materials were evaluated with simple model syst...
Autori: Elena Maria Iannicelli-Zubiani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27408

Considering that glass containers are generally highly transparent they are good candidates for spectroscopic measurements and application of a transmittance for glass separation. The selection of glass container samples directly from municipal waste disposal bins, characterized by different colors, thicknesses, and shapes was done. Transmittance spectra of clear, green, amber and black clean glass containers were recorded, along with spectra of the usual bottled liquids. Positions of the absorp...
Autori: Dragana D. Strbac
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27452

Three modified bentonites, hydroxy-aluminum pillared bentonite (Al(OH)-Bent), cetyl trimethylammonium bromide modified bentonite (CTAB-Bent), and both cetyl trimethylammonium bromide and hydroxy-aluminum modified bentonite (Al(OH)-CTAB-Bent) were prepared and characterized by Fourier transform infrared spectroscopy (FTIR) analysis. Batch experiments were conducted on the adsorption of phenol at different temperatures, pH and initial concentration. The results indicated that adsorption capacity o...
Autori: Xiping Luo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27481

This paper investigates the macrophyte Azolla pinnata modified with sodium hydroxide, as a bioadsorbent for Cu2+ and Pb2+ ions in synthetic solutions. Biomaterial characterization was performed using Scanning Electronic Microscopy (SEM); Energy- Dispersive X-Ray Spectroscopy (EDX); Fourier Transform Infra-red (FTIR) spectroscopy techniques and through the blocking of carboxylic and sulfonic functional groups. Kinetics of the process has highlighted a quick and efficient adsorption, even in low ...
Autori: Arielle Barros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27532

This paper describes the preparation and use of a low cost biosorbent made of castor leaves for the extraction of Cu(II) from an aqueous medium. The biosorbent was characterized by Fourier transform infrared spectroscopy (FTIR), surface area and pore diameter measurements. The results showed absorption bands of carboxylic and amide groups at 1738 and 1540 cm-1, respectively, and the measured surface area was 1.3728 ± 0.0160 m2 g-1, with predominance of microporous < 10.51 Å. ...
Autori: Milene S. Pereira
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27540

The synthesis and the study of the complexes obtained in this paper represent the beginning of our research for applied coordinative compounds of this type in agriculture. The analysis and the study of Mn(II) complexes with DL-β-Aminoisobutyric acid as ligand were accomplished in aqueous and alcoholic solution and also in solid state.The composition ratios and the stability of the synthesised compounds were analysed with specific methods: conductance, pH measurements, spectrophotometry and ...
Autori: Doina Sibiescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27549

A polycrystalline CeO2-ZnO catalyst was prepared by using a hydrothermal procedure in order to improve the structural properties. This polycrystalline material was then used to remove organic pollutants from aqueous solutions by the means of photocatalysis. The structural, morphological and optical properties of as-prepared materials were characterized by several techniques, such as UV-visible spectroscopy, SEM, FTIR, XRD. The SEM analysis shows that the crystallite size sample varies in the ran...
Autori: Nicolae Apostolescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27550

Dielectric measurements were carried out on a series of bent-core liquid crystals based on resorcinol and 2, 7-dihydroxinaphtalene cores and presenting B mesophase in between 30-160°C. The dielectric constants in the liquid crystalline phase were measured as a function of frequency and temperature. The dielectric relaxation of bent-core compounds has been analyzed by dielectric constants/frequency curves. The variation of the dielectric strength with temperature has been determined as well. ...
Autori: Irina Carlescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27568

In this study, Ag/TiO2–P25 nanoparticles prepared via photodeposition method and its textural properties were characterized using X–ray diffraction (XRD), transmission electron microscopy (TEM), UV–vis diffuse reflectance spectroscopy (DRS), and N2 physisorption techniques. The cements modified with TiO2–P25 and Ag/TiO2–P25 nanoparticles were immobilized on tile plates, and their photocatalytic activity was evaluated versus the removal of Erioglaucine as the model o...
Autori: Mohammad A. Behnajady
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27589

Thin-film transistor liquid-crystal display (TFT-LCD) waste glass can be used as a raw material for producing geopolymers, because it contains large amounts of silicon and aluminum in its amorphous structure. The setting time and compressive strength were evaluated to determine the quality of the geopolymer product with various amounts of nano-SiO2 (0%–3%) and TFT-LCD waste glass replacement (0% - 40%). The microstructures of the samples were characterized using mercury intrusion porosimet...
Autori: Kang Gao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27634

Magnesium wastes are among the gradually ascending and therefore challenging metal wastes, which are produced by many industrial activities. The purpose of this study is the usage of magnesium waste, a raw material in magnesium borate production by hydrothermal synthesis. Boron sources (boric acid (H3BO3) and boron oxide (B2O3)) react with magnesium wastes in order to synthesize the magnesium borate mineral of admontite (MgO(B2O3)3ꞏ7(H2O)). In addition to the synthesis from waste magne...
Autori: Azmi Seyhun Kipcak
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27657

Adsorption, desorption, and kinetics behavior of Gd(III) ion on chelating resin were investigated in this paper. Batch adsorption studies were carried out with different pH, contact time, and temperature. The adsorption of Gd(III) follows the Langmuir model better than the Freundlich model. The apparent activation energy Ea and adsorption rate constant are k308 4.16 kJ/mol and 6.01×10-5 s-1, respectively. Thermodynamic parameters such as ΔH, ΔS and ΔG indicated that Gd(II...
Autori: Leilei Pi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27688

The aim of this paper is to show the results of two methodological approaches applied for decontamination of the Midia Port dredged sediment to assess their potential reusability. Firstly, the sediment samples were defined in physical, chemical, microbiological and ecotoxicological terms. The results were compared to the limit values established by environmental regulations for dredged sediment management. Some sediment samples exposed a very high concentration of hydrocarbons; the sediments wer...
Autori: Irina Catianis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27770

Heavy metals are inorganic persistent pollutants with adverse health and environmental effects. In our study, self-synthesized iron oxide magnetic nanoparticles were encapsulated in the Phanerochaete chrysosporium (P. chrysosporium) hyphae. The prepared biosorbents possessed high efficiency for Pb(II) biosorption from single and binary metal systems. The maximum biosorption capacity was found to be 50.05 mg g–1 at pH 5.0. Environmental scanning electron microscope accompanied with energy d...
Autori: Danlian Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27864

The native and surface modified adsorbents from agricultural waste, such as Psyllium stalks (PS) were investigated for their ability to remove the Coomassie Brilliant Blue (CBB) dye from aqueous media. The native and surface modified adsorbents were characterized by the Fourier Transform Infrared spectroscopy (FTIR). The results show that the Sodium Bicarbonate Treated Carbon (SBTC) has good surface properties for the removal of the CBB dye from aqueous media. The SBTC was analyzed by Scanni...
Autori: Premkumar Manickam Periyaraman
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27898

In the present work, acid treated natural oil palm trunk powder (OPTP) has been utilized as novel adsorbents for the removal of methyl orange (MO) from aqueous solution. The batch method was employed to study the adsorption behavior of MO which was subsequently determined by UV/Visible spectrophotometer. The adsorption characteristics and operational parameters were determined by monitoring different parameters such as pH, contact time, dye concentration and temperature. The acid treated OPTP an...
Autori: Akil Ahmad
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27975

Synthesis of silver nanoparticles (AgNPs) by plants is a simple, non-toxic and eco-friendly method. The purpose of this study was to develop a method for obtaining silver nanoparticles with biological properties. For reducing the silver ions, an extract of Tilia cordata (linden) flowers was used. Some parameters were investigated to optimize the synthesis method. Thus, the conditions of reaction were varied, such as pH, concentration of silver salt, different ratio of plant extract and silver sa...
Autori: Andreia Corciova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27977

The paper reports on the preparation of polysiloxane hydrophobized viscose-maghemite/goethite magnetic composite with properties appropriate for uses in oil spill sorption from polluted aqueous media. A multi-step procedure was employed to obtain the polymeric composite. The structures of the prepared samples and precursors were analyzed by Fourier transform infrared spectroscopy (FTIR), whereas their morphology was investigated by means of scanning electron microscopy (SEM). The hydrophobic...
Autori: Răzvan Rotaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28008

The combustion behavior of several polymers was studied with a cone calorimeter, while the samples were based on a recycled acrylonitrile-butadiene styrene (ABS) and as additives were considered: organic montmorillonite (OMT) and a mixture of two fire retardants (FR). The samples structure and thermal properties are characterized by means of Scanning electron microscopy (SEM), X-ray Powder Diffraction(XRD) and Energy-dispersive X-ray spectroscopy (EDX) and cone calorimeter. The main objective o...
Autori: Tudor Mihai Simionescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28098

In the present research, the intensity of contamination with heavy elements Vanadium (V) and Arsenic (As) in the coastal sediments of Bandar Abbas is gauged and rated using the method of Atomic Absorption Spectroscopy. All processes of sampling and assimilation of sediments are performed according to the guideline of the Manual of Oceanographic Observations and Pollutant Analyses Methods (MOOPAM) Standard issued by the Regional Organization for the Protection of the Marine Environment (RAPMI).T...
Autori: Akbar Elsagh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28105

In this work, the removal of methyl orange (MO) and Cd2+ by simultaneous adsorption on adsorbent obtained from modified charcoal (BCBH) coated with TiO2 has been studied. The synthesized materials obtained from wood branches were characterized using atomic force microscopy (AFM) for the roughness and SEM to determine the morphology of the surface. EDX spectroscopy indicates the presence of C, N, O, Na, K, P and Ti on the surface of the adsorbent materials. The micro-porosity and BET specific sur...
Autori: Nicoleta Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28157

The contamination of aquatic and terrestrial environments by pesticides is highlighted by their possible toxic properties and poor biodegradability on the environment. The development of low cost by products from agricultural sectors as a suitable solution for contaminated areas remediation is of great environmental interest. Straw wastes can be considered as a promising alternative to remove different chemical compound that are environmentally toxic. In this study, some materials derived from ...
Autori: Irina Gabriela Cara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28161

Inorganic ceramic materials is receiving more attention in recent times due to their unique characteristics which include different pore structures, hydrophilic surfaces, high chemical, thermal and mechanical stabilities that offer avenues for application in water treatment. In the present work, cost-effective clay ceramic water filters of different designs were developed from clay (50, 60, and 70) %, sawdust (15, 20, 25, and 35) %, grog (5, 10 and 15)% ratios plus 5% bone char by volume and ...
Autori: Enyew Amare Zereffa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28196

Cultural heritage objects represent valuable testimonies of the past, which must be kept in the right condition to transmit to future generations. Together with the spectacular progress recorded by humankind regarding technology, opportunities to obtain valuable data on heritage objects so as to preserve them have started to emerge. The current researchers aimed to determine the internal composition of the colors and materials used in some paintings from a historic wooden church monument, from ...
Autori: Elena Demenchuk
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28230

Pollution with aromatic hydrocarbon has been rising because of the extreme usage of benzene containing compounds. Most of the people, animals and plants have been exposed to aromatic hydrocarbons due to polluted water sources. The aim of the present work was to carry out an experimental study for the photocatalytic degradation of aromatic hydrocarbon containing compounds by irontitanium- pillared interlayered clays (Fe-Ti-PILCs) and copper-titanium-pillared interlayered clays (Cu-Ti-PILCs). For ...
Autori: Beytullah Eren
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28249

The work is devoted to the search and investigation of the properties of the effective environmentally friendly phytoremediation activators. An integrated approach was used to evaluate the effect of the compositions of thiosulfonates with rhamnolipid biosurfactant on remediation plants. The biochemical and biophysical analysis of the rapeseed and ryegrass plants grown in the oil polluted soil - photosynthetic pigments, indicators of oxidative reactions and electrical impedance characteristics we...
Autori: Olena Yaremkevych
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28319

The concentrations of Copper (Cu), cadmium (Cd), manganese (Mn) and lead (Pb) in liver, kidneys and red meat of cattle slaughtered in selected abattoirs in Owerri metropolis, Nigeria were studied using atomic absorption spectroscopy (AAS). This was performed in relation to their concentrations in a forage grass, Panicum maximum randomly harvested from roadsides of Owerri- Onitsha and Owerri-Aba expressways. Results obtained showed that cattle meat samples contained all heavy metals studied. Thei...
Autori: Henry Uzoma Anuforo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28320

The present study describes the facile synthesis of silver nanoparticles (AgNPs) by green method using aqueous extract of Gazania rigens. The size, morphological, compositional and optical properties of silver nanoparticles were examined through X-ray diffraction (XRD), Energy Dispersive X-ray spectroscopy (EDX), Scanning Electron Microscope (SEM), and UV-Vis spectroscopy respectively. Ultraviolet-Visible spectra showed the absorbance band between 425–460 nm which indicated the synthesis o...
Autori: Tayyaba Shahzadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28349