Personal Research Database

Full Text: 2010\J Haz Mat182, 303.pdf

Abstract: The work focused on Tl uptake by white mustard (Sinapis alba L) grown on moderately contaminated soils with different characteristics. The data presented here clearly demonstrate the ability of white mustard to (hyper)accumulate Tl. Substantially higher Tl levels were was found in mustard grown on the Arenosol as compared to the carbonate-rich Leptosol: a relationship between the content of labile Tl (adsorbed, bound to carbonates etc.) in soil and its uptake by the plant is suggested. Approximately 3-fold lower concentrations of Tl in roots and stems of the mature mustard (compared to the young plant) indicate a decreasing trend of Tl uptake with the age of the plant. The exchangeable/acid-extractable and reducible Tl fractions were evaluated as the dominant fractions controlling Tl transfer from both contrasting soils. Thallium associated with the residual fraction (e.g., incorporated into silicates) was rather stable in the rhizosphere, proving a negligible influence of root exudates on Tl release from such an operationally defined fraction, despite the anthropogenic origin of Tl. Regarding our results, when mustard is cultivated for nutrition purposes and/or as green manure, it may pose an important source of Tl introduction into the food chain. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Accumulation, Availability, Brassicaceae, Food Chain, Health, Hyperaccumulator Plants, Iberis-Intermedia, Key Factor, Phytoextraction, Potassium, Rhizosphere, Silicates, Silver, Soil, Soils, Sorption, Thallium, Trend, Vegetables

? Zhao, Y.Q., Yue, Q.Y., Li, Q.A., Gao, B.Y., Han, S.X. and Yu, H. (2010), The regeneration characteristics of various red mud granular adsorbents (RMGA) for phosphate removal using different desorption reagents. Journal of Hazardous Materials, 182 (1-3), 309-316.

Full Text: 2010\J Haz Mat182, 309.pdf

Abstract: In this research, various red mud granular adsorbents (RMGA), which were made from red mud - a kind of waste residue from the alumina industry, were manufactured under different sintering temperatures (ST). For the purpose of investigating the regeneration characteristics of them for phosphate removal, systematic experiments were carried out, including adsorption, desorption (using different desorption reagents) and resorption tests. When RMGA were desorbed by HCl solutions, the desorption efficiencies were relatively higher due to acid erosion, but the corresponding resorption capacities became small owing to extraction of effective components. Although RMGA rarely released phosphate in desorption process when being desorbed by deionised water, it performed well on resorption of phosphate afterwards. It was assumed that the lower pH in resorption process, which was caused by the reductive release of CaO into solution, contributed to a weaker competition of OH- on phosphate resorption. When NaOH solution was employed as the desorption reagent, resorption capacities of RMGA were relatively larger and increased with the increase of NaOH concentration, because OH- might ameliorate the chemical composition on the surface of RMGA potentially. In addition, several RMGA manufactured under lower ST obtained larger resorption capacities than their original adsorption capacities, because of the comparatively unstable crystal structure which led to a stronger amelioration on them. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorption, Aluminum-Industry, Aqueous-Solutions, Ceramic Industry, Chemical Composition, Coagulant, Desorption, Fly-Ash, Granular Adsorbents, Mechanisms, pH, Phosphate Removal, Red Mud, Regeneration, Removal, Research, Waste, Water

? Velmurugan, P., Shim, J., You, Y., Choi, S., Kamala-Kannan, S., Lee, K.J., Kim, H.J. and Oh, B.T. (2010), Removal of zinc by live, dead, and dried biomass of Fusarium spp. isolated from the abandoned-metal mine in South Korea and its perspective of producing nanocrystals. Journal of Hazardous Materials, 182 (1-3), 317-324.

Full Text: 2010\J Haz Mat182, 317.pdf

Abstract: Bioremediation is an innovative and alternative technology to remove heavy metal pollutants from aqueous solution using biomass from various microorganisms like algae, fungi and bacteria. In this study biosorption of zinc onto live, dead and dried biomass of Fusarium spp. was investigated as a function of initial zinc(II) concentration, pH, temperature, agitation and inoculum volume. It was observed that dried, dead and live biomass efficiently removed zinc at 60 min at an initial pH of 6.0 +/- 0.3. Temperature of 40 degrees C was optimum at agitation speed of 150 or 200 rpm. The initial metal concentration (10-320 mg L-1) significantly influenced the biosorption of the fungi. Overall, biosorption was high with 30-60% by dried, live and dead biomass. In addition to this, the potential of Fusarium spp. to produce zinc nanocrystals was determined by transmission electron microscopy, energy-dispersive spectroscopy, X-ray diffraction and fourier transform infrared spectroscopy, which showed that dead biomass was not significantly involved in production of zinc nanocrystals. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorption, Aqueous-Solution, Aspergillus-Niger, Bacteria, Biomass, Bioremediation, Biosorption, Cadmium, Fungi, Fusarium spp., Heavy Metal, Heavy-Metals, Infrared, Ions, Lead, Microorganisms, Nanocrystal Formation, pH, Phanerochaete-Chrysosporium, Production, Removal, Technology, X-Ray Diffraction, Zinc, Zinc(II)

? Mandal, B. and Ghosh, N. (2010), Combined cation-exchange and extraction chromatographic method of preconcentration and concomitant separation of bismuth(III) with high molecular mass liquid cation exchanger. Journal of Hazardous Materials, 182 (1-3), 363-370.

Full Text: 2010\J Haz Mat182, 363.pdf

Abstract: A selective method has been developed for the extraction chromatographic separation of Bi-III with Versatic 10 coated on silanized silica gel (SSG). Bi-III has been quantitatively extracted from 0.1 M acetate buffer at the range of pH 5.0-5.5. The result showed that the solution pH, influent volume, flow-rate and solution temperature would affect the sorption of Bi-III. The sorbed Bi-III was eluted with 0.1 M H2SO4. The extractor system has got good values of exchange capacity (1.42 meq. of H+ g(-1) of dry exchanger at 25 degrees C), breakthrough capacity (19.75 mg g(-1) at pH 5.5) and column efficiencies (300) with respect to Bi-III. The positive value of Delta H (12.63 kJ mol(-1)) and Delta S (0.271 kJ mol(-1) K-1) and negative value of Delta G (-68.241 kJ mol(-1)) indicated that the sorption process was endothermic, entropy gaining and spontaneous in nature. P.F. has been optimized at 76.4 +/- 0.3 and the desorption constants K-desorption (8 x 10(-3)) and K-desorption’ (1.4 x 10(-1)) have been determined. R-f values and selectivity factors for diverse metal ions with respect to that of Bi-III have been determined by ion-exchange paper chromatography. Bi-III has been separated from synthetic mixtures containing its congeners and other metal ions associated with it in ores and alloy samples. The method was found effective for removal of Bi-III from different water samples. A plausible mechanism for the extraction of Bi-III has been suggested. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Breakthrough, Cation Exchange, Complex, Desorption, Extraction Chromatography, Ion Exchange, Metal Ions, Metal-Ions, pH, Preconcentration, Recovery, Removal, Selective Separation of BI-III, Selectivity Factors, Silica, Silica-Gel, Solid-Phase Extraction, Sorption, Spectrometry, System, Trace Amounts, Versatic 10, Water, Water Samples

? Ibrahim, M.N.M., Ngah, W.S.W., Norliyana, M.S., Daud, W.R.W., Rafatullah, M., Sulaiman, O. and Hashim, R. (2010), A novel agricultural waste adsorbent for the removal of Lead(II) ions from aqueous solutions. Journal of Hazardous Materials, 182 (1-3), 377-385.

Full Text: 2010\J Haz Mat182, 377.pdf

Abstract: The present study explores the ability of modified soda lignin (MSL) extracted from oil palm empty fruit bunches (EFB) in removing Lead(II) ions from aqueous solutions. The effect of contact time, point zero charge (pH(pzc)) and pH of the solution, initial metal ion concentration and adsorbent dosage on the removal process were investigated. Furthermore, the MSL is characterized by SEM, XRF, FT-IR and surface area analysis. Equilibrium adsorption isotherms and kinetics were investigated. The experimental data were analyzed by the Langmuir, Freundlich and Temkin models of adsorption. The kinetic data obtained at different initial concentrations were analyzed using pseudo-first-order and pseudo-second-order models. The results provide strong evidence to support the hypothesis of adsorption mechanism. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorbent, Adsorbent Dosage, Adsorption, Adsorption, Adsorption Isotherms, Adsorption Mechanism, Agricultural, Agricultural Waste, Analysis, Aqueous Solutions, By-Products, Cadmium, Charge, Chromium, Concentration, Cu(II), Data, Empty Fruit Bunch, Equilibrium, Evidence, Experimental, Freundlich, FT-IR, FTIR, Ions, Isotherm, Isotherms, Kinetic, Kinetics, Langmuir, Lead, Lead(II) Ion, Lignin, Mechanism, Metal, Models, Modified, Oil Palm Empty Fruit Bunches, Pb(II), pH, Pseudo First Order, Pseudo Second Order, Pseudo-First-Order, Pseudo-Second-Order, Removal, Rights, Sawdust, Sem, Soda Lignin, Solution, Solutions, Sorption, Steelmaking Industry, Support, Surface, Surface Area, Temkin, Waste

? Ma, Y.F., Zhang, J.L., Tian, B.Z., Chen, F. and Wang, L.Z. (2010), Synthesis and characterization of thermally stable Sm,N co-doped TiO₂ with highly visible light activity. Journal of Hazardous Materials, 182 (1-3), 386-393.

Full Text: 2010\J Haz Mat182, 386.pdf

Abstract: Samarium and nitrogen co-doped titania (Sm/N-TiO2) was successfully prepared via coprecipitation method. The resulting materials were characterized by X-ray diffraction (XRD), N-2 physical adsorption, UV-vis absorbance spectroscopy. X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared (FTIR) spectra. Experimental results indicated that samarium doping inhibited the growth of crystalline size and the transformation from anatase to rutile phase. The photocatalytic activities of the samples were evaluated for degradation of salicylic acid under visible light irradiation. It was found that the Sm/N-TiO2 samples presented much higher photocatalytic activity than N-TiO2 and pure TiO2 under visible light irradiation. This could be attributed to the appropriate crystallite size, more efficient separation of electrons and holes on Sm/N-TiO2. In our experiments, the optimal dopant amount of samarium was 1.5% for the maximum photocatalytic degradation and the sample calcined at 400 degrees C showed the best reactivity. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Acid, Adsorption, Degradation, Enhanced Degradation, Fourier Transform Infrared, Infrared, Mixtures, Nanoparticles, Nitrogen, Oxide, Photocatalysis, Photodegradation, Powders, Sm-N Co-Doping, TiO₂, Titanium-Dioxide Photocatalysts, Visible Light, X-Ray Diffraction, XPS, XRD

? Cheng, Z.H., Liu, X.S.A., Han, M. and Ma, W. (2010), Adsorption kinetic character of copper ions onto a modified chitosan transparent thin membrane from aqueous solution. Journal of Hazardous Materials, 182 (1-3), 408-415.

Full Text: 2010\J Haz Mat182, 408.pdf

Abstract: A modified chitosan transparent thin membrane (MCTTM) was prepared and used as the adsorbent to investigate the adsorption kinetics due to excellent capacity of removing copper ions in water solution. The structure and morphology of MCTTM were characterized by SEM analysis and FTIR analysis. External mass transfer, intra particle diffusion, and pseudo-first and pseudo-second order models were used to describe the adsorption process. The results obtained from the study illustrated that the adsorption process could be described by the pseudo-second order model, which indicated adsorption process was a chemical adsorption behavior of chelation ion exchange proved by the FTIR and adsorption free energy analysis. External mass transfer and intra particle diffusion processes were the rate-controlling steps. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.

Keywords: Adsorbent, Adsorption, Adsorption Behavior, Adsorption Kinetic, Adsorption Kinetics, Adsorptive Membrane, Analysis, Aqueous Solution, Behavior, Biosorbents, Biosorption, Capacity, Chelation, Chemical, Chitosan, Copper, Copper Ions, Diffusion, Diffusion Processes, Dye Adsorption, Energy, Equilibrium, FTIR, FTIR Analysis, Heavy-Metals, Ion Exchange, Ion-Exchange, Ions, Isotherms, Kinetic, Kinetics, Mass Transfer, Membrane, Model, Models, Modified, Morphology, Particle Diffusion, Pseudo Second Order, Pseudo-First and, Pseudo-Second Order, Pseudo-Second Order Model, Pseudo-Second-Order, Removal, Rights, SEM, Solution, Sorbents, Sorption, Structure, Water

? Sun, X.Q., Ji, Y., Zhang, L.N., Chen, J. and Li, D.Q. (2010), Separation of cobalt and nickel using inner synergistic extraction from bifunctional ionic liquid extractant (Bif-ILE). Journal of Hazardous Materials, 182 (1-3), 447-452.

Full Text: 2010\J Haz Mat182, 447.pdf

Abstract: The inner synergistic extraction of [tricaprylmethylammonium][sec-octylphenoxy acetate] ([A336][CA-12]) is studied for cobalt and nickel separation. Distribution ratios of [A336][CA-12] for Co2+ or Ni2+ are by far higher than those of tricaprylmethylammonium sulfate ([A336](2)SO4), sec-octylphenoxy acetic acid (CA-12), mixture of [A336](2)SO4 and CA-12 at the acidities from 1 x 10(-5) mol L-1 to 1 x 10(-3) mol L-1. The synergy coefficients of [A336][CA-12] for Co2+ are higher than the synergy coefficients of [A336][CA-12] for Ni2+, which can be used for the Co2+ and Ni2+ separation. Some thermodynamic properties of the inner synergistic extraction using [A336][CA-12] for Co2+ and Ni2+ are also studied, such as influence of temperature, thermodynamic functions, extraction mechanism, separation factors and stripping properties. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorption, Bifunctional Ionic Liquid Extractant, Cobalt, Cyanex-302, Fabrication, Inner Synergistic Extraction, Mechanisms, Ni²⁺, Nickel, Octylphenoxy Acetic-Acid, Performance, Rare-Earths, Separation, Solid-Phase Extraction, System, Thermodynamic, Water

? Zhou, L.M., Xu, J.P., Liang, X.Z. and Liu, Z.R. (2010), Adsorption of platinum(IV) and palladium(II) from aqueous solution by magnetic cross-linking chitosan nanoparticles modified with ethylenediamine. Journal of Hazardous Materials, 182 (1-3), 518-524.

Full Text: 2010\J Haz Mat182, 518.pdf

Abstract: The adsorption characteristics of platinum(IV) and palladium(II)from aqueous solutions onto the ethylenediamine-modified magnetic chitosan nanoparticles (EMCN) have been investigated. The magnetic chitosan nanoparticles were prepared by adding the basic precipitant of NaOH solution into a W/O microemulsion system. The transmission electron microscope showed that the diameter of EMCN was from 15 to 40 nm. The adsorption experiments indicated that the maximum adsorption capacity occurred at around pH 2.0 for both Pt(IV) and Pd(II). Due to the small diameter and the high surface reactivity, the adsorption equilibrium of Pt(IV) and Pd(II) onto the EMCN reached very quickly. The maximum loading capacity of EMCN for Pt(IV) and Pd(II) was determined to be 171 and 138 mg/g, respectively. Sorption isotherms were determined both in single component with pure metal solutions and bicomponent systems with different Pd/Pt mass ratios. The results showed that the sorbents had a greater affinity for Pt(IV) than for Pd(II). The total sorption capacity was comparable to that of each metal individually, indicating that the metals compete for the same sorption sites. It was found that 0.4 M HNO3-1.0 M thiourea solution provided effectiveness of the desorption of Pt(IV) and Pd(II) from EMCN, while 5 M ammonia exhibited the highest selectivity for the tested metal ions. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorption, Adsorption Capacity, Aqueous Solutions, Chitosan, Derivatives, Desorption, Equilibrium, Ethylenediamine, Glutaraldehyde, Isotherms, Linked Chitosan, Magnetic Nanoadsorbents, Membranes, Mercury(II), Metal Ions, Metal-Ions, Nanoparticles, Palladium(II), pH, Platinum(IV), Removal, Resin, Separation, Sorption, Sorption Isotherms, System

? Kiliç, N.K., Duygu, E. and Dönmez, G. (2010), Triacontanol hormone stimulates population, growth and Brilliant Blue R dye removal by common duckweed from culture media. Journal of Hazardous Materials, 182 (1-3), 525-530.

Full Text: 2010\J Haz Mat182, 525.pdf

Abstract: This work is focussed on assessing the potentialities of Lemna minor (L) for the treatment of reactive dyes polluted wastewaters and investigating the possibility of bioremoval performance stimulation by adding triacontanol hormone to the cultures. In the vast literature describing removal of reactive dyes, considering the lack of reports using of common duckweed in wastewater treatment apparently due to the inadequate efficiency. In the present study, the experiments showed that 1 mg l(-1) triacontanol stimulated duckweed growth. The effect of different dye types (Reactive Orange 14, Reactive Red 120, Reactive Black 5, Brilliant Blue R, and Reactive Brilliant Blue R) onto duckweed growth was tested. Plants grew at most in media with Brilliant Blue R. The highest biomass, in terms of frond number (87 +/- 1.5) were accompanied with 59.6% maximum dye removal were found in samples containing 2.5 mg l(-1) initial Brilliant Blue R and 1 mg l(-1) triacontanol, indicating hormonal stimulation of both activities. The results presented here that L. minor (L) could be used effectively to treat wastewaters containing dye. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Bioaccumulation, Biomass, Bioremoval, Biosorption, Brilliant Blue R, Chlorella-Vulgaris, Common Duckweed, Decolorization, Dye, Dyes, L., Lemna Minor, Lemna-Minor-L, Literature, Plant-Growth, Reactive Dyes, Removal, Responses, Treatment, Triacontanol, Waste-Water, Wastewater, Wastewater Treatment

? Liang, C.J. and Chen, Y.J. (2010), Evaluation of activated carbon for remediating benzene contamination: Adsorption and oxidative regeneration. Journal of Hazardous Materials, 182 (1-3), 544-551.

Full Text: 2010\J Haz Mat182, 544.pdf

Abstract: This study investigated the potential usage of activated carbon (AC) as a permeable reactive barrier material for the adsorption of benzene contaminant. Sodium persulfate (SPS) or pyrite (FeS₂) activated SPS oxidation was used for the regeneration of spent AC. Results indicate that persulfate oxidation of AC caused a loss of electrons and a reduction in adsorptive capacity due to the formation of acidic functional groups on the AC. Concerning the reactants that can be used for oxidation of the benzene contaminants, SPS/FeS₂/AC, as oppose to SPS/AC, can achieve benzene destruction in both the aqueous and the sorbed phases. Furthermore, regeneration of benzene spent AC by SPS or SPS/FeS₂ revealed that SPS oxidation resulted primarily in desorption of benzene over direct oxidation of AC sorbed benzene. In contrast, the SPS/FeS₂ system achieved complete oxidation of desorbed benzene in the aqueous phase while also oxidizing sorbed benzene. Results of re-adsorption show that oxidative regeneration recovered around 70% of the AC adsorption sites and the remaining capacity was mostly occupied by the residual benzene on the AC. This study demonstrates that SPS or FeS₂ activated SPS oxidation is an effective alternative method for the regeneration of spent AC. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: 2,4,6-Trinitrotoluene, Activated Carbon, Adsorption, Alternative, Aqueous Phase, Aqueous-Solutions, Aromatic-Compounds, Barrier, Benzene, Capacity, Carbon, Contaminant, Contaminants, Contamination, Desorption, Functional Groups, Functional-Groups, Groundwater Remediation, Hydrogen-Peroxide, In Situ Chemical Oxidation, Oxidation, Permeable Reactive Barrier, Persulfate, Persulfate Oxidation, Phenol, Potential, Pyrite, Re-Adsorption, Reactive Barrier, Reduction, Regeneration, Rights, Surface-Chemistry, Trichloroethylene, Water

? Ahmadpour, A., Zabihi, M., Tahmasbi, M. and Bastami, T.R. (2010), Effect of adsorbents and chemical treatments on the removal of strontium from aqueous solutions. Journal of Hazardous Materials, 182 (1-3), 552-556.

Full Text: 2010\J Haz Mat182, 552.pdf

Abstract: In the present investigation, three different solid wastes namely almond green hull, eggplant hull, and moss were initially treated and used as adsorbents for the adsorption of strontium ion from aqueous solutions. Adsorbent types and chemical treatments are proved to have effective roles on the adsorption of Sr(II) ion. Among the three adsorbents, almond green hull demonstrated strong affinity toward strontium ion in different solutions. The effectiveness of this new adsorbent was studied in batch adsorption mode under a variety of experimental conditions such as: different chemical treatments, various amounts of adsorbent, and initial metal-ion concentration. The optimum doses of adsorbent for the maximum Sr(II) adsorption were found to be 0.2 and 0.3 g for 45 and 102 mg L^-1 solutions, respectively. High Sr(II) adsorption efficiencies were achieved only in the first 3 min of adsorbent’s contact time. The kinetics of Sr(II) adsorption on almond green hull was also examined and it was observed that it follows the pseudo second-order behavior. Both Langmuir and Freundlich models well predicted the experimental adsorption isotherm data. The maximum adsorption capacity on almond green hull was found to be 116.3 mg g^-1. The present study also confirmed that these low cost agriculture byproducts could be used as efficient adsorbents for the removal of strontium from wastewater streams. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: Adsorbent, Adsorbents, Adsorption, Adsorption Behavior, Adsorption Capacity, Adsorption Isotherm, Agriculture, Almond Green Hull, Aqueous Solutions, Batch, Batch Adsorption, Behavior, Capacity, Cesium, Chemical, Chemical Treatments, Concentration, Cost, Data, Effectiveness, Eggplant Hull, Experimental, First, Freundlich, Investigation, Ion, Isotherm, Kinetics, L1, Langmuir, Low Cost, Membrane, Mode, Models, Moss, Oxide, Precipitation, Pseudo Second Order, Pseudo Second-Order, Pseudo-Second-Order, Radioactive-Waste, Radionuclides, Removal, Rights, Second Order, Second-Order, Solid Waste, Solutions, Streams, Strontium, Wastewater, Water

? Sarijo, S.H., Hussein, M.Z., Yahaya, A.H.J. and Zainal, Z. (2010), Effect of incoming and outgoing exchangeable anions on the release kinetics of phenoxyherbicides nanohybrids. Journal of Hazardous Materials, 182 (1-3), 563-569.

Full Text: 2010\J Haz Mat182, 563.pdf

Abstract: The release of chlorophenoxyherbicides agrochemicals. namely 2-chloro- (2CPA), 4-chloro and 2,4,5-trichloro (TCPA) phenoxyacetates from their nanohybrids into various aqueous solutions: carbonate, sulfate and chloride was found to be controlled by pseudo-second order rate expression. The percentage saturated released was found to be anionic-dependent, in the order of carbonate > sulfate > chloride for the release media and 2CPA > 4CPA > TCPA for the anionic guests. This study demonstrates that the release of the phenoxyherbicides agrochemicals from the nanohybrid compounds can be tuned by choosing the right combination of exchangeable anions both the incoming and the outgoing anions. (C) 2010 Elsevier B.V. All rights reserved.

Keywords: 2,4,5-Trichlorophenoxyacetate, 2,4-D, 2-Chlorophenoxyacetate, 4-Chlorophenoxyacetates, Adsorption, Agrochemicals, Alachlor, Anions, Aqueous Solutions, Carbonate, Chloride, Controlled Release, Desorption, Expression, Herbicides, Hydrotalcite, Kinetics, Layered Double Hydroxide, Layered Double Hydroxides, Media, Mobility, Pesticides, Pseudo Second Order, Pseudo-Second Order, Pseudo-Second-Order, Release, Right, Rights, Saturated Release, Soils, Solutions, Sulfate

? Gialamouidis, D., Mitrakas, M. and Liakopoulou-Kyriakides, M. (2010), Equilibrium, thermodynamic and kinetic studies on biosorption of Mn(II) from aqueous solution by Pseudomonas sp., Staphylococcus xylosus and Blakeslea trispora cells. Journal of Hazardous Materials,