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Rezultatele pentru vitamin b2Rezultate gasite: 21
Environmental Engineering and Management Journal, Vol. 3 Nr. 4
Environmental Engineering and Management Journal › Vol. 3 › Nr. 4 Contain all the articles from this issueICEEM /02 PLENARY SESSION:"Environmental Engineering and Management in the Context of Sustainable Development"Design for sustainability (D4S): towards advanced product conceptsHan Brezet, Sacha SilvesterICEEM/02 - ENVIRONMENTAL ENGINEERING SECTION"Water and Wastewater Treatment Technologies"Complex approach to the problem of persistent organic pollutants degradation in water environmentVictor Covaliov, Olga Covaliova, Angela Cincilei, Gilles Mailhot, Pasca... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25176
Enhanced heavy metal adsorption on dye-modified fly ash
Environmental Engineering and Management Journal › Vol. 8 › Nr. 4 Abstract
The use of fly ash (FA) in wastewater treatment received a lot of attention for the immobilization of heavy metal cations, mainly Cd2+, Pb2+, Ni2+, Zn2+, Cu2+. For an up-scalable wastewater treatment process, the substrate must have good adsorption efficiency and relatively constant behaviour. Modifying the fly ash surface can be a solution for reaching both goals. The use of FA for heavy metals removal, from wastewaters resulted in the dye finishing industry, faces a supplementary p... Autori: Maria Visa, Anca Duta ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25471
Hydroxyapatite/polyurethane composite membranes for lead ions removal
Environmental Engineering and Management Journal › Vol. 8 › Nr. 6 Abstract
This work describes the preparation of a hydroxyapatite/polyurethane composite membrane and their characteristics. The porous hydroxyapatite/polyurethane composite membranes were made via solvent casting process. The deposited hydroxyapatite layers were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The data suggest that the method utilized in this work can be applied to obtain deposition of coating of crystalline hydroxyapatite on porous polyurethane... Autori: Gabriela Ciobanu, Dorina Ignat, Gabriela Carja, Constantin Luca ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25572
NEW POLYURETHANE – HYDROXYAPATITE COMPOSITES MEMBRANES
Environmental Engineering and Management Journal › Vol. 11 › Nr. 2 This research investigates the influence of certain vitamins (A and D2) on the possibility of hydroxyapatite formation on polymer surfaces. A coating method based on biomimetic techniques was used to form a crystalline hydroxyapatite thin layer on porous polyurethane matrix. The method is based on a wet process of hydroxyapatite formation that involves porous polyurethane film soaking in a modified synthetic Simulated Body Fluid (SBF) solution. This modified SBF solution contains vitamin A and v... Autori: Alina Costina Luca, Constantin Luca, Gabriela Ciobanu, Simona Ilisei ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25884
KINETICS AND EQUILIBRIUM ADSORPTION STUDY OF LEAD (II) ONTO LOW COST CLAYS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 3 AbstractThe performance of four low cost Iraqi clays, bentonite (BT), kaolinite (KT), attapalgite (AT) and flint (FT) to remove lead ionsfrom aqueous solutions by adsorption was investigated. Batch experiments were carried out at pre determined equilibration time,adsorbent dosage, solution pH, particle sizes, ionic strength, initial lead ions concentration and temperature. Adsorption of Pb2+ions was strongly affected by pH and best adsorption is achieved at pH 4.5. The systems were investigated ... Autori: Najwa I. Abdulla ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26086
STUDY OF HEAVY METAL POLLUTION AND BIOACCUMULATION IN THE BLACK SEA LIVING ENVIRONMENT
Environmental Engineering and Management Journal › Vol. 12 › Nr. 2
Abstract
The Black Sea is seriously affected by a large range of pollutants, despite severe laws regarding the protection of sea ecosystems.
Heavy metals are among the most important xenobiotics from the environment, presenting also toxicity for humans.
The studies upon heavy metals have proven that the sediments have the highest concentrations and they can release metals back
to water and this fact represents a risk for the humans and aquatic ecosystem life.
The use of aquatic ... Autori: Oana Jitar ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26112
ROMANIAN SURFACE WATER QUALITY: TARNAVA MARE RIVER BETWEEN MEDIAS AND COPSA MICA CASE STUDY
Environmental Engineering and Management Journal › Vol. 12 › Nr. 2
Abstract
A set of 500 water samples collected from various sites of Tarnava Mare River, between Medias and Copsa Mica were analyzed,
during three years (2010-2012). The physicochemical parameters like: temperature, pH, electrical conductivity (EC), total
dissolved solids (TDS), salinity, calcium (Ca2+), magnesium (Mg2+), sodium (Na+), lead (Pb2+), chloride (Cl-), sulfate (SO4
2-),
ammonium (NH4
+), nitrite (NO2
-) and nitrate (NO3
-) were determined. The results were co... Autori: Ioana Piştea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26114
MONITORING THE EFFECTS OF ULTRAVIOLET AND VISIBLE LIGHT ON Rb AND VITAMIN A IN MILK
Environmental Engineering and Management Journal › Vol. 12 › Nr.12 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
PNiPAM-FUNCTIONALIZED MESOPOROUS CARBON FOR THE ADSORPTION OF VITAMIN B2
Environmental Engineering and Management Journal › Vol. 14 › Nr. 3 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
INFLUENCE OF OPERATING CONDITIONS ON THE REMOVAL OF HEAVY METALS FROM INDUSTRIAL WASTEWATER BY BIOSORPTION
Environmental Engineering and Management Journal › Vol. 14 › Nr. 10 Abstract
Free cells of Rhizopus oryzae were used to study adsorption of several cations (Cu2+, Zn2+, Mn2+, Ni2+, Cd2+ and Pb2+) from
wastewater within various experimental conditions. The influence of biomass dosage, pH and temperature on the removal
process was investigated. The sorption efficiency increased with increasing the temperature in the range from 25 ºC to 30 ºC and
pH from 5 to 8. The maximum removal percentage was achieved at a biosorbent concentration 0.25 – 0.3... Autori: Kolishka Tsekova ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26857
STUDY OF THE ADSORPTION OF Cu2+, Cd2+ AND Pb2+ ON AMORPHOUS Al(OH)3 IN DRINKING WATER SUPPLY NETWORKS
Environmental Engineering and Management Journal › Vol. 14 › Nr. 12 Abstract
Trace metal elements commonly exist in drinking water. Excessive exposing on them may result in lots of health problems. This
paper mainly focuses on the accumulations of Cu2+, Cd2+, and Pb2+ in drinking water supply networks with amorphous Al(OH)3
formation. The effects of pH, water flow rate, and metal element contents were investigated at laboratory bench scale. It was
found that chemical adsorption mainly occurred at pH > 7.0. Suspended Al(OH)3 showed a strong adsorption capa... Autori: Wendong Wang ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26906
OPTIMIZATION OF THE BIOSORPTION OF Cr3+, Cd2+ AND Pb2+ USING A NEW BIOWASTE: Zea mays SEED CHAFF
Environmental Engineering and Management Journal › Vol. 15 › Nr. 7 This study highlights the potential use of yellow Zea mays seed chaff (YZMSC) biomass as a biosorbent for the removal of Cr3+,
Cd2+ and Pb2+ ions from aqueous solutions. Fourier transformed Infrared analysis of the biomass suggests that YZMSC biomass is
basically composed of cellulose and methyl cellulose. The biosorption capacities, qmax, of YZMSC biomass for Cr3+, Cd2+ and
Pb2+ are 14.68, 121.95 and 384.62 mg/g respectively. Biosorption equilibrium was achieved at 20, 30 and 60 min for Cr3+... Autori: Jonathan Oyebamiji Babalola ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27083
EQUILIBRIUM STUDIES ON THE BIOSORPTION OF LEAD (Pb2+) CONTAMINATED WASTEWATER USING CATTAILS LEAVES
Environmental Engineering and Management Journal › Vol. 15 › Nr. 10 Dried Typha angustifolia (TA) leavesor commonly known as the common cattail were evaluated as an adsorbent for the
adsorption of lead in synthetic aqueous solutions. Equilibrium studies were conducted in a batch mode and the selected sorption
isotherms were then applied. Equilibrium was achieved after 8 hours. The selected sorption isotherms were the Langmuir,
Freundlich, D-R and Temkin model. Data fitting was done based on linear regression analysis. The adsorption system fitted the
Langmui... Autori: Yen Ling Sharain-Liew ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27166
ION-EXCHANGE MECHANISM IN BIOSORPTION OF Pb2+ IONS FROM CONTAMINATED WATER BY BANANA STALK WASTE
Environmental Engineering and Management Journal › Vol. 15 › Nr. 12 Banana stalk (BS) waste is used to remove Pb2+ from aqueous solution. Equilibrium data were analyzed with Langmuir and Freundlich adsorption models, which fit better in the former equation. The qmax (maximum metal uptake capacity) for Pb2+ adsorption was 105.14 mg/g of BS at pH 5.0, which followed pseudo-second order kinetics model. IR spectra confirmed the participation of hydroxyl, amino, and acidic functional moieties in the removal of Pb2+. The major mechanism involved in the biosorption of ... Autori: Kashif Iqbal Sahibzada ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27214
LEAD(II) REMOVAL FROM AQUEOUS SOLUTIONS BY SERBIAN ZEOLITIC TUFF
Environmental Engineering and Management Journal › Vol. 16 › Nr. 1 The present study was aimed at examining the ability of the natural zeolitic tuff from the Zlatokop deposit in Serbia to remove Pb(II) ions from aqueous solutions under various conditions. It has been found that the adsorption proceeds via an ion-exchange reaction in which the Na+ ions from the clinoptilolite phase of the tuff are replaced to a high degree by aqueous Pb(II) ions. The removal capacity of the clinoptilolite at 298 K varies from 78 mg Pb g–1 (for C0 = 100 mg Pb dm–3) to... Autori: Djordje Stojakovic ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27234
EVALUATION OF COPPER AND LEAD BIOSORPTION ON MODIFIED Azolla pinnata (R. Br.)
Environmental Engineering and Management Journal › Vol. 17 › Nr. 1 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
VALORIZATION OF MICROALGAL BIOMASS
Environmental Engineering and Management Journal › Vol. 17 › Nr. 4 Microalgae can be considered as significant sources of sustainable and beneficial biocompounds such as carotenoids, lipids, proteins, polysaccharides, pigments, vitamins etc., with many uses in energy production (biofuels), pharmaceutical, cosmetic and food industries. This class of microorganisms are considered as sustainable feedstock due to some major advantages related to metabolism modulation, faster growth rate compared to plants, no use of terrestrial land. This review will present the mo... Autori: Alexandra Cristina Blaga ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27558
STUDY OF DIFFERENT ENCAPSULATING AGENTS FOR THE MICROENCAPSULATION OF VITAMIN B12
Environmental Engineering and Management Journal › Vol. 17 › Nr. 4 Recently, the studies about vitamin B12 increased due to the high number of people who can develop vitamin B12 deficiency, namely: vegetarians, pregnant women or with vitamin B12 malabsorption. One solution to correct the low nutritional intake of vitamin B12 can be using food supplements or pharmaceuticals, based on the vitamin B12 microencapsulation. In the present research, the vitamin B12 microencapsulation and the controlled release of fresh and 4 months’ storage samples of vitamin B1... Autori: Ioana C. Carlan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27559
Environmental engineering and Management Journal No. 4
› Vol. 1 › Nr. 11 • Environmental engineering and Management Journal No. 4
• AN ENHANCED ENVIRONMENTAL MULTIMEDIA MODELLING SYSTEM (FEMMS): PART II USER INTERFACE AND FIELD VALIDATION
• COST-EFFECTIVENESS OF OPTIMIZING CONCENTRATED FEED BLENDS TO DECREASE GREENHOUSE GAS EMISSIONS
• FATE AND BIODEGRADATION OF ESTROGENS IN THE ENVIRONMENT AND ENGINEERING SYSTEMS A REVIEW
• ANALYSIS OF THE MATERIAL COMPOSITION OF MIXED MUN... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27577
Environmental engineering and Management Journal No. 4
Environmental Engineering and Management Journal › Vol. 17 › Nr. 4 • Environmental engineering and Management Journal No. 4
• AN ENHANCED ENVIRONMENTAL MULTIMEDIA MODELLING SYSTEM (FEMMS): PART II USER INTERFACE AND FIELD VALIDATION
• COST-EFFECTIVENESS OF OPTIMIZING CONCENTRATED FEED BLENDS TO DECREASE GREENHOUSE GAS EMISSIONS
• FATE AND BIODEGRADATION OF ESTROGENS IN THE ENVIRONMENT AND ENGINEERING SYSTEMS A REVIEW
• ANALYSIS OF THE MATERIAL COMPOSITION OF MIXED MUN... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27576
REUSE OF MAGNESIUM WASTES IN HYDROTHERMAL SYNTHESIS OF A MAGNESIUM BORATE MINERAL: ADMONTITE
Environmental Engineering and Management Journal › Vol. 17 › Nr. 3 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 |