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Equilibrium and kinetic modelling of cadmium(II) biosorption by nonliving algal biomass Oedogonium sp. from aqueous phase.
J Hazard Mater. 2008 May 01; 153(1-2):759-66.JH

Abstract

The biosorption of cadmium(II) ions on Oedogonium sp. is studied in a batch system with respect to initial pH, algal dose, contact time and the temperature. The algal biomass exhibited the highest cadmium(II) uptake capacity at 25 degrees C, at the initial pH value of 5.0 in 55 min and at the initial cadmium(II) ion concentration of 200 mg L(-1). Biosorption capacity decreased from 88.9 to 80.4 mg g(-1) with an increase in temperature from 25 to 45 degrees C at this initial cadmium(II) concentration. Uptake kinetics follows the pseudo-second-order model and equilibrium is well described by Langmuir isotherm. Isotherms have been used to determine thermodynamic parameters of the process, viz., free energy change, enthalpy change and entropy change. FTIR analysis of algal biomass revealed the presence of amino, carboxyl, hydroxyl and carbonyl groups, which are responsible for biosorption of metal ions. Acid pretreatments did not substantially increase metal sorption capacity but alkali like NaOH pretreatment slightly enhanced the metal removal ability of the biomass. During repeated sorption/desorption cycles at the end of fifth cycle, Cd(II) sorption decreased by 18%, with 15-20% loss of biomass. Nevertheless, Oedogonium sp. appears to be a good sorbent for removing metal Cd(II) from aqueous phase.

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Authors+Show Affiliations

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

MeSH

AdsorptionBiomassCadmiumChlorophytaHydrogen-Ion ConcentrationKineticsModels, ChemicalTemperatureThermodynamicsWaste Disposal, FluidWater Pollutants, ChemicalWater Purification

Pub Type(s)

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

Language

eng

PubMed ID

17942222

Citation

Gupta, V K., and A Rastogi. "Equilibrium and Kinetic Modelling of cadmium(II) Biosorption By Nonliving Algal Biomass Oedogonium Sp. From Aqueous Phase." Journal of Hazardous Materials, vol. 153, no. 1-2, 2008, pp. 759-66.
Gupta VK, Rastogi A. Equilibrium and kinetic modelling of cadmium(II) biosorption by nonliving algal biomass Oedogonium sp. from aqueous phase. J Hazard Mater. 2008;153(1-2):759-66.
Gupta, V. K., & Rastogi, A. (2008). Equilibrium and kinetic modelling of cadmium(II) biosorption by nonliving algal biomass Oedogonium sp. from aqueous phase. Journal of Hazardous Materials, 153(1-2), 759-66.
Gupta VK, Rastogi A. Equilibrium and Kinetic Modelling of cadmium(II) Biosorption By Nonliving Algal Biomass Oedogonium Sp. From Aqueous Phase. J Hazard Mater. 2008 May 1;153(1-2):759-66. PubMed PMID: 17942222.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Equilibrium and kinetic modelling of cadmium(II) biosorption by nonliving algal biomass Oedogonium sp. from aqueous phase. AU - Gupta,V K, AU - Rastogi,A, Y1 - 2007/09/08/ PY - 2007/07/20/received PY - 2007/09/06/revised PY - 2007/09/06/accepted PY - 2007/10/19/pubmed PY - 2008/7/3/medline PY - 2007/10/19/entrez SP - 759 EP - 66 JF - Journal of hazardous materials JO - J Hazard Mater VL - 153 IS - 1-2 N2 - The biosorption of cadmium(II) ions on Oedogonium sp. is studied in a batch system with respect to initial pH, algal dose, contact time and the temperature. The algal biomass exhibited the highest cadmium(II) uptake capacity at 25 degrees C, at the initial pH value of 5.0 in 55 min and at the initial cadmium(II) ion concentration of 200 mg L(-1). Biosorption capacity decreased from 88.9 to 80.4 mg g(-1) with an increase in temperature from 25 to 45 degrees C at this initial cadmium(II) concentration. Uptake kinetics follows the pseudo-second-order model and equilibrium is well described by Langmuir isotherm. Isotherms have been used to determine thermodynamic parameters of the process, viz., free energy change, enthalpy change and entropy change. FTIR analysis of algal biomass revealed the presence of amino, carboxyl, hydroxyl and carbonyl groups, which are responsible for biosorption of metal ions. Acid pretreatments did not substantially increase metal sorption capacity but alkali like NaOH pretreatment slightly enhanced the metal removal ability of the biomass. During repeated sorption/desorption cycles at the end of fifth cycle, Cd(II) sorption decreased by 18%, with 15-20% loss of biomass. Nevertheless, Oedogonium sp. appears to be a good sorbent for removing metal Cd(II) from aqueous phase. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/17942222/Equilibrium_and_kinetic_modelling_of_cadmium_II__biosorption_by_nonliving_algal_biomass_Oedogonium_sp__from_aqueous_phase_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(07)01308-8 DB - PRIME DP - Unbound Medicine ER -