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

Abstract This paper introduces and analyses the results of some research regarding the recovery of fine chips from the slurry resulted from the finishing operations (grinding) of the parts used in automobile industry. Little chips, in the form of slime, represent a very important source of raw materials when preparing the powders and at the same time it can be appreciated that the volume of these chips in the form of slurry is high enough so that its use can substantially diminish the product...
Autori: Olimpia Ghermec, Cristian Ghermec, Marin Didu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25552

The beneficial effect of urban plants in improving air quality is often mentioned in literature but is seldom quantified and valuated. Quantification and valuation of the benefits provided by urban plants allow direct comparison between plant species and help make more informed urban planning decisions. Based on fieldwork study and data processing, carbon dioxide (CO2) sequestration, oxygen (O2) generation, transpiration cooling, sulfur dioxide (SO2) removal and dust interception are quantified ...
Autori: Qijiao Xie, Zhixiang Zhou, Fang Chenhttp://www.ecozone.ro/reviste.php?RID=25710

Abstract:Films of CuxS with 430-700 nm thickness were deposited by robotic spray pyrolysis technique, at T = 300Â?C, using 90 sprayingsequences, from water:ethanol:glycerol = 7:2:1 (in volumes) solutions with a molar ratio Cu:S = 1:2.5-3.5. Relative dense,homogenous and uniform films of CuxS (x = 1.8-2), with Eg = 1.97-2.49 eV and exhibiting electric resistance behavior wereobtained. The as-deposited films were annealed in air or in sulfur atmosphere, at 300 Â?C, for one hour. Dense and uniform ...
Autori: Alexandru Enesca, Anca Duta, Ionut Popovici, Luminita Isac
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25749

Abstract:This paper aims to analyze two types of wooden briquettes made from different raw material, in order to determine thecompactness of the wood used, namely their compaction coefficient. This factor is a new feature of briquettes that defines moreprecisely the quality of them. The density of raw material and briquettes causes the compaction coefficient, namely the ratiobetween them. Relevance of research and scientific innovation results from the fact that European standard of wooden briqu...
Autori: Aurel Lunguleasa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25753

Abstract:The increasing of energy consumption and fossil fuel emissions (especially CO2, SO2 and NOx) and the limitation of crude oilreserves, determined a growing trend toward renewable energy technologies, like solar, wind, geo-thermal energy and biomass forbiofuels.From all the renewable energies sources, biomass attracts more and more interest being a renewable resource with economicpotential, which can be found all over the world, with positive environmental properties due to neutral emissi...
Autori: Anca Sauciuc, Angela Potetz, Georg Schlaub, Gerald Weber, Hermann Hofbauer, Lucia Dumitrescu, Reinhard Rauch, Ziad Abosteif
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25762

Abstract:Bioremediation is considered as one of the prominent and cost-effective cleanup technology to treat oily sludge disposals. In the present investigation anaerobic bioremediation of petroleum based oily sludge was studied in a slurry reactor by applying different experimental strategies viz., bioaugmentation, biostimulation and co-substrate addition. Total petroleum hydrocarbons (TPH) present in the oily sludge before and after degradation was extracted using soxhlet extraction procedure....
Autori: Asha Juwarkar, Kuppam Chandrasekhar, Mamilla Prathima Devi, Motakatla Venkateswar Reddy, Ponnapalli Nageswara Sarma, Srinivasula Reddy Venkata Mohan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25794

Abstract:Titanium metal and its alloys have been widely used as implants under load-bearing conditions due to their biocompatibility, excellent corrosion resistance and lightness, but their inability to bond to living bone is a setback. The experiments outlined here investigated hydroxyapatite (HA) coating on Ti metal implants, used to enhance their bioactive properties. In this study, specimens of commercially pure titanium (c.p. Ti) and Ti-6Al-4V were etched in either H3PO4 or HCl, and subsequ...
Autori: Chao-Lun Fu, Hsueh-Chuan Hsu, Shih-Ching Wu, Shih-Kuang Hsu, Wen-Fu Ho
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25795

In 2012, the Faculty of Hydrotechnics,Geodesy and Environmental Engineering of The"Gheorghe Asachi" Technical University of Iasi,Romania celebrated 50 years of education in the fieldof hydraulic engineering at the Polytechnic Instituteof Iasi.In 1948, in the same time with the EducationReform in Romania, in Galati, the Faculty ofHidrology was founded. At the same time, studentswho were attending the Rural EngineeringSpecialization in Bucharest were also transferred tothe new established Faculty....
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26048

AbstractThe slag and the ash, resulted after the lignite burning in the boilers of Thermal Power Plant located at Timisoara South(Romania), are hydraulically evacuated at the storage facility for slag and ash near village Utvin. Fine ash from compartments ofslag and ash deposits that are not covered by water can be driven by air currents, causing pollution. After admission of Romaniain European Community, the rules for environmental protection are strictly applied. This paper presents the review...
Autori: Emilian Stefan Valea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26081

Abstract Being constantly surrounded by sound, in most cases we operate ignoring this “environmental noise”, but when the noise intensity increases, it becomes a pollutant, adversely affecting the level of professional performance, leading to fatigue, causing nervousness or decreasing the quantitative and/or qualitative level of performance. The main objective of this paper is to evaluate the noise problem in the Strand district of Sibiu and to highlight the negative effects affect...
Autori: Valentin Petrescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26131

Abstract An original Discrete Perfect Sets (DPS) algorithm was developed and applied to clustering of earthquake epicenters with M≥3.0 in California. The obtained clusters correspond well with the locations of the epicenters of strong earthquakes with M≥6.5. This fact allows considering them as earthquake-prone areas for the magnitude M≥6.5. We compared the obtained clusters with the areas recognized in 1976 using Earthquake-Prone Areas (EPA) method. The compariso...
Autori: Alexei Gvishiani
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26132

AbstractThe solidified waste drilling mud has been landfilled into slurry ponds with impermeable layer at oil & gas field since 1990s. Thisarticle aims to elucidate the heavy metal contaminations from landfill ponds at semiarid region. The heavy metal concentration inthe waste and its potential mobility based on its binding forms was studied. Furthermore, the blocking effect of impermeable layer was used to elaborate the environmental effects of heavy metals. From the analysis, Cr was found ...
Autori: Yun Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26171

AbstractCoal fire is a serious hazard in China and also in other coal-producing countries. A lot of studies have been done by manyinvestigators. This paper analyzes the environmental hazards of coal fire and introduces the current prevention methods. Thestudy reveals that coal fires in Northwest China still induce severe hazards. They result in serious air pollution, water pollution,ecological disturbance and geological disasters, which are analyzed in detail. The current coal fire prevention me...
Autori: Xuyao Qi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26184

AbstractConcerns for the river environment in Malaysia were highlighted. There had been occurrences of inadequate supply of water incertain cities and unexpected floods over the last few years. This paper discusses the results and efforts to clean the Gombak Riverwhich passes through several industrial areas and the City of Kuala Lumpur and the Penchala River which has an extra burden ofpassing through a highly densely populated Kuala Lumpur satellite city. Both rivers were considered polluted w...
Autori: Zubaidah Ismail
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26257

AbstractFor efficient, economical and environmentally disposing the waste rock underground, based on principles of waste directbackfilling in fully mechanized coal mining, this paper carries out a field test in 6304-1 working face of Jining No.3 Coal Mine.We first design a waste rock direct underground processing system, including screening-crushing system, transportation system,transfer system, stope backfilling system and coal mining system. Then optimize the waste backfilling and coal miningt...
Autori: Jixiong Zhang, Qiang Zhang, Xu Zhao, Yanli Huang, Zhan Liu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26383

AbstractAmong foods that possess potent medicinal properties, Cucurbitaceae seeds stand as a promising source, since they are assumedto have a protective effect against oxidative stress. In order to analyze the antioxidant compounds of the seeds of Citrulluslanatus, Lagenaria siceraria, Telfaria occidentalis, Cucurbita maxima, Cucumis sativus, Cucumeropsis mannii, and Cucurbitamoschata, the dried seeds were extracted in MeOH-H2O (50 %; v/v) mixture at constant mixing rate. Qualitative phytochemi...
Autori: Aristide Guillaume Silapeux Kamda
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26440

AbstractThe sludge treatment processes represent a priority when we refer to the municipal wastewater treatment, but can implicate verycomplex studies and applications if we consider the industrial wastewater recovery and treatment processes. Even if the industrialsludges are seen as wastes, they can represent an important resource if are properly managed in the storage, treatment andrecovery processes. This paper aims to identify some methods to optimize the coagulation and flocculation process...
Autori: Mariana Turcu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26444

Abstract Mapping the distribution of populations has become an important issue in geographical and relative researchers. Combining population and spatial data allows for socio-graphic information to be visualized, in order to evaluate the total numbers of people at risk of environmental health hazards, who have died in natural disasters etc. Therefore, spatial distribution of population data is an effective way to integrate statistical and spatial data. This paper presents a multi-factor dat...
Autori: Yu Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26686

Abstract Plants have an effective role in reducing noise pollution. The aim of this study was to evaluate the impact of broad-leaved and coniferous species on reducing noise pollution according to the distance from the sound source and the tree species type. For this purpose, 25 plots for coniferous species and 25 plots for the broadleaved species was selected. The decibel-meter (Casella Enhances CEL-630) and the trumpet (FIAMM) of machine were used to measure the sound level. Results indica...
Autori: Mehran Nasiri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26723

Abstract In the context of biogas sustainability assessment, a promising way to reach greenhouse gases (GHG) reduction and fossil energy savings is the anaerobic digestion (AD) of both animal manure and energy crops. Nowadays, more than 1,100 AD plants are working in Italy, mostly located in Northern Regions. To those plants with an electrical power lower than 1 MW, strong public incentives were given, therefore, several of them have been put into operation; this entailed increasing cereal ...
Autori: Jacopo Bacenetti
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26771

Abstract This study carried out for the first time a comparison among ligninolytic (white-rot) and cellulosolytic or xylanolytic (Trichoderma) pre-treated wheat straw, for biogas production, potential, without or with pig slurry in co-digestion. Methane (CH4) production from wheat straw pre-treated for 4 and 10 weeks with seven different fungal isolates was preliminarily measured. Then, the effects on biogas yield of the co-digestion with pig slurry were checked on straw pre-treated with 3 s...
Autori: Ciro Vasmara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26796

Abstract The atmospheric air is considered a large and renewable source of fresh water. The present work investigates the application of solar energy to heat wick clothes impregnated with calcium chloride to extract water from atmospheric air. A wick desiccant solar collector is erected at Tanta – Egypt for this purpose. The desiccant concentration at the beginning of regeneration is determined according to the climatic conditions. The saturated wick desiccant is exposed to an ambient ...
Autori: Abd elnaby Kabeel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26861

Ranunculus rionii and Ceratophyllum demersum develop aquatic dense stands, which lately started to represent a major ecological concern for all the ponds and/or lakes in Romania. The potential relationships between the phytochemical compounds detected in these plant extracts (acids, phenols, heterocycles, alcohols, hydrocarbures) and the allelopathic properties against Gram positive and Gram negative bacterial strains and microalgal cultures were investigated and discussed in the current stud...
Autori: Mariana Lupoae
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26971

Heavy metal pollution is a major source of aquatic contamination and has deleterious effect on the environment, therefore treatment of the polluted sites and wastewater becomes very essential. Biofilm based bioremoval of heavy metals have been a new area of research. Bacterial strains belonging to the genus Bacillus, isolated from chromium polluted soil (Palar river basin, India) have been employed as consortium for Cr(III) removal from chrome tanning effluent. The bacterial isolates were fou...
Autori: Aafreen Fathima
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27086

The present study investigates the effect of addition of calcium hypochlorite in the titanium dioxide (TiO2) mediated degradation of bio-recalcitrant wastewater from pharmaceutical industry. The degradation studies were carried out in photoreactor irradiated with ultraviolet (UV) light at 365 nm under slurry mode. The reduction in chemical oxygen demand (COD) was estimated as an index of degradation. The influence of process parameters viz., catalyst dose, pH, oxidant concentration and source...
Autori: Amit Dhir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27097

In this study, the potential for biogas production from biodegradable bioplastics was evaluated. Mater-Bi® (a family of maizestarch based flexible films) and PLA (PolyLactic Acid; a rigid, polylactide-based, polymer) bioplastics were digested in laboratory batch reactors, alone or in co-digestion with pig slurry or scotta (partially deproteinized cheese whey), at 35°C or 55°C. Methane (CH4) and hydrogen (H2) production were monitored during the incubation period. Maximum CH4 (Mmax...
Autori: Ciro Vasmara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27134

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

Urban Heat Island (UHI) is expected to be a disastrous challenge to human in the following decade as a result of continuous urbanization without appropriate planning and design. The impacts of UHI are even getting worse due to large population density with improper building design especially in dense metropolitan cities. A lot of research has been carried out for UHI phenomenon both in tropical and seasonal climates. There are many factors contributing to the formation of UHI phenomenon that inc...
Autori: Yee Yong Lee
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27438

The present study aims to compare the efficiency of a single extraction and a 3-stage cross-current extraction of PAHs from both lowly contaminated (LC) and highly contaminated (HC) sands using palm kernel and soybean oils (PKO, SO). It is observed that 3-stage cross-current extractions increase the total efficiencies compared to single extractions by 18.7–22.7% and 27.2–30.6% for LC and HC sands, respectively. Maximum efficiencies of 94.3% and 98.4% are obtained for phenanthrene (PH...
Autori: Ee Von Lau
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27530

The growth of a non-axenic Phormidium bigranulatum-dominated mat was tested under a range of chemical parameters and types of substrate. Total biomass yield (in term of mg chlorophyll a) of mats grown on muslin cloth (0.64 mg) and cotton mesh (0.62 mg) were significantly higher than those on other substrates, such as, nylon net (0.50 mg), sands of river Sone (0.43 mg) and river Ganga (0.30 mg), rice husk (0.38 mg) and saw dust (0.21 mg). The Phormidium mat would be easy to handle in bioremdation...
Autori: Dhananjay Kumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27635

Large amounts of spent coffee grounds (SCG) are currently available all over the world due to the enormous increase in coffee consumption. This increase has in turn to be related to the even greater diffusion of coffee vending machines. The aim of this study was to evaluate the biomethanation potential (BMP) of SCG alone or in co-digestion with pig slurry (PS). Pig slurry was chosen because it is frequently utilized as feedstock for biogas production from agricultural waste. The raw material was...
Autori: Ciro Vasmara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27794

A study on the biodegradability of several formulations based on poly[vinyl alcohol] (PVA) and wood flour has been carried out. Basically, all formulations are based on PVA and wood flour, and the influence of starch, glycerol and/or polyvinyl chloride (PVC) incorporated in some of them was investigated. Biodegradation was performed by incubation of the composites with a selected Aspergillus niger strain able to act as an polymer biodegrading agent. The composites biodegradation was evaluated...
Autori: Luiza Jecu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27886

In this work, the examination of separation of gypsum from wastewater generated during the machining of casts and the method of waste gypsum management have been presented. This waste gypsum is produced in Ortolab Poland facilities. Gypsum casts are cut and ground in water-cooled circular saws. Wastewater, with over-normative content of suspension, 10000 mg L-1 and sulphates, 1600 mg L-1 is produced in the process. The analysis of water and wastewater management in Ortolab Poland facilities l...
Autori: Ewa Liwarska-Bizukojc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27910

The western forests and rangelands of Iran in Zagros Mountain are valuable ecosystems for protecting the water and soil resources and providing the habitat for endemic fauna and flora. These ecosystems have widely destroyed by human interferences in the recent years. The land cover mapping using an accurate method is the first step to prevent the further destruction of these ecosystems. The aim of this study was to generate a land cover map of Ilam (Western Iran) using Sentinel-2A data at 10 m s...
Autori: Saeedeh Eskandari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28192

Nutrients have been considered the main factor affecting microorganisms responsible for methane gas production during anaerobic digestion processes. In this study, the nutritional composition of some fruit wastes; mango (M), watermelon (W), pawpaw (P), their effects on methane gas production, and resulting energy values were assessed. Substrate samples for anaerobic digestion where prepared into various slurry treatments; M, W, P, WM, PW, MP, MWP and CONTROL. Proximate compositions of the subst...
Autori: Ogemdi Chinwendu Anika
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28233

This study is designed in order to determine the impact of Zhadao highway construction on ecological environment of Qinghai- Tibet Plateau, by comparing the quality of ecological environment before and after highway implementation. An index system of ecological environment impact evaluation of highway area is established, including terrain slope, vegetation coverage, desertification index and land use type. With the help of data mining and grey correlation degree theory, an ecological environmen...
Autori: Xingli Jia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28239