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Biosorption of hexavalent chromium by raw and acid-treated green alga Oedogonium hatei from aqueous solutions.
J Hazard Mater. 2009 Apr 15; 163(1):396-402.JH

Abstract

The hexavalent chromium, Cr(VI), biosorption by raw and acid-treated Oedogonium hatei were studied from aqueous solutions. Batch experiments were conducted to determine the biosorption properties of the biomass. The optimum conditions of biosorption were found to be: a biomass dose of 0.8 g/L, contact time of 110 min, pH and temperature 2.0 and 318 K respectively. Both Langmuir and Freundlich isotherm equations could fit the equilibrium data. Under the optimal conditions, the biosorption capacities of the raw and acid-treated algae were 31 and 35.2 mg Cr(VI) per g of dry adsorbent, respectively. Thermodynamic parameters showed that the adsorption of Cr(VI) onto algal biomass was feasible, spontaneous and endothermic under studied conditions. The pseudo-first-order kinetic model adequately describe the kinetic data in comparison to second-order model and the process involving rate-controlling step is much complex involving both boundary layer and intra-particle diffusion processes. The physical and chemical properties of the biosorbent were determined and the nature of biomass-metal ions interactions were evaluated by FTIR analysis, which showed the participation of -COOH, -OH and -NH(2) groups in the biosorption process. Biosorbents could be regenerated using 0.1 M NaOH solution, with up to 75% recovery. Thus, the biomass used in this work proved to be effective materials for the treatment of chromium bearing aqueous solutions.

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Authors+Show Affiliations

Gupta VK
Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India. vinodfcy@iitr.ernet.in
Rastogi A
No affiliation info available

MeSH

AcidsChlorophytaChromiumDiffusionHydrogen-Ion ConcentrationSolutionsTemperatureThermodynamicsTime Factors

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18691812

Citation

Gupta, V K., and A Rastogi. "Biosorption of Hexavalent Chromium By Raw and Acid-treated Green Alga Oedogonium Hatei From Aqueous Solutions." Journal of Hazardous Materials, vol. 163, no. 1, 2009, pp. 396-402.
Gupta VK, Rastogi A. Biosorption of hexavalent chromium by raw and acid-treated green alga Oedogonium hatei from aqueous solutions. J Hazard Mater. 2009;163(1):396-402.
Gupta, V. K., & Rastogi, A. (2009). Biosorption of hexavalent chromium by raw and acid-treated green alga Oedogonium hatei from aqueous solutions. Journal of Hazardous Materials, 163(1), 396-402. https://doi.org/10.1016/j.jhazmat.2008.06.104
Gupta VK, Rastogi A. Biosorption of Hexavalent Chromium By Raw and Acid-treated Green Alga Oedogonium Hatei From Aqueous Solutions. J Hazard Mater. 2009 Apr 15;163(1):396-402. PubMed PMID: 18691812.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Biosorption of hexavalent chromium by raw and acid-treated green alga Oedogonium hatei from aqueous solutions. AU - Gupta,V K, AU - Rastogi,A, Y1 - 2008/07/03/ PY - 2008/05/07/received PY - 2008/06/26/revised PY - 2008/06/26/accepted PY - 2008/8/12/pubmed PY - 2009/4/3/medline PY - 2008/8/12/entrez SP - 396 EP - 402 JF - Journal of hazardous materials JO - J Hazard Mater VL - 163 IS - 1 N2 - The hexavalent chromium, Cr(VI), biosorption by raw and acid-treated Oedogonium hatei were studied from aqueous solutions. Batch experiments were conducted to determine the biosorption properties of the biomass. The optimum conditions of biosorption were found to be: a biomass dose of 0.8 g/L, contact time of 110 min, pH and temperature 2.0 and 318 K respectively. Both Langmuir and Freundlich isotherm equations could fit the equilibrium data. Under the optimal conditions, the biosorption capacities of the raw and acid-treated algae were 31 and 35.2 mg Cr(VI) per g of dry adsorbent, respectively. Thermodynamic parameters showed that the adsorption of Cr(VI) onto algal biomass was feasible, spontaneous and endothermic under studied conditions. The pseudo-first-order kinetic model adequately describe the kinetic data in comparison to second-order model and the process involving rate-controlling step is much complex involving both boundary layer and intra-particle diffusion processes. The physical and chemical properties of the biosorbent were determined and the nature of biomass-metal ions interactions were evaluated by FTIR analysis, which showed the participation of -COOH, -OH and -NH(2) groups in the biosorption process. Biosorbents could be regenerated using 0.1 M NaOH solution, with up to 75% recovery. Thus, the biomass used in this work proved to be effective materials for the treatment of chromium bearing aqueous solutions. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/18691812/Biosorption_of_hexavalent_chromium_by_raw_and_acid_treated_green_alga_Oedogonium_hatei_from_aqueous_solutions_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(08)01007-8 DB - PRIME DP - Unbound Medicine ER -