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An economically viable method for the removal of selected divalent metal ions from aqueous solutions using activated rice husk.
Colloids Surf B Biointerfaces. 2010 Jan 01; 75(1):149-55.CS

Abstract

Biosorption of divalent metal ions, i.e. Pb(II), Cd(II), Zn(II) and Cu(II) onto rice husk activated (RHA) is investigated over pH range (1-10) via batch adsorption technique. The chemical and thermal activation of rice husk with 0.1M HNO(3) and 1M K(2)CO(3) at 473 K enhanced the removal efficiency of RHA (35+/-2.1-99+/-0.5%, 33+/-1.2-97+/-0.6%, 32+/-1.3-96+/-0.8% and 28+/-1.8-95+/-0.9% before and after treatment, respectively). The surface area analysis of RHA by BET (Brunauer, Emmett and Teller) nitrogen adsorption method provided pore area and average pore diameter to be 542+/-2.3m(2)g(-1) and 1076+/-5.6 nm respectively. SEM and FTIR analyses of RHA were carried out to determine the surface morphology and functional groups involved in metal binding mechanism, respectively. The adsorption equilibrium was well described by Freundlich, Langmuir and Dubinin-Radushkevish (D-R) isotherm models by employing (4.8-48, 8.9-89, 15.3-153 and 15.7-157)x10(-5)M solution concentrations of sorbates, respectively, at equilibrium time of 20 min at pH 6 and onto 0.2g of sorbent. The kinetics of mass transfer and intra-particle diffusion for metal ions sorption onto RHA were studied with Lagergren and Morris-Weber kinetic models. The numerical values of thermodynamic parameters indicated the exothermic nature, spontaneity and feasibility of the sorption process. The desorption study of metal components from RHA surface was carried out with 0.1M HCl. The sorption mechanism developed illustrates the strong interactions of sorbates with the active sites of the sorbent coupled with efficient and environmentally clean exploitation of rice waste product.

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Publisher Full Text

Authors+Show Affiliations

Akhtar M
National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan. profmarao@yahoo.com
Iqbal S
No affiliation info available
Kausar A
No affiliation info available
Bhanger MI
No affiliation info available
Shaheen MA
No affiliation info available

MeSH

AdsorptionBiodegradation, EnvironmentalCations, DivalentEnvironmental Restoration and RemediationHydrogen-Ion ConcentrationIndustrial WasteKineticsMetalsOryzaSolutionsSpectroscopy, Fourier Transform InfraredTemperatureWaste Disposal, Fluid

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19734025

Citation

Akhtar, Mubeena, et al. "An Economically Viable Method for the Removal of Selected Divalent Metal Ions From Aqueous Solutions Using Activated Rice Husk." Colloids and Surfaces. B, Biointerfaces, vol. 75, no. 1, 2010, pp. 149-55.
Akhtar M, Iqbal S, Kausar A, et al. An economically viable method for the removal of selected divalent metal ions from aqueous solutions using activated rice husk. Colloids Surf B Biointerfaces. 2010;75(1):149-55.
Akhtar, M., Iqbal, S., Kausar, A., Bhanger, M. I., & Shaheen, M. A. (2010). An economically viable method for the removal of selected divalent metal ions from aqueous solutions using activated rice husk. Colloids and Surfaces. B, Biointerfaces, 75(1), 149-55. https://doi.org/10.1016/j.colsurfb.2009.08.025
Akhtar M, et al. An Economically Viable Method for the Removal of Selected Divalent Metal Ions From Aqueous Solutions Using Activated Rice Husk. Colloids Surf B Biointerfaces. 2010 Jan 1;75(1):149-55. PubMed PMID: 19734025.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - An economically viable method for the removal of selected divalent metal ions from aqueous solutions using activated rice husk. AU - Akhtar,Mubeena, AU - Iqbal,Shahid, AU - Kausar,Abida, AU - Bhanger,M I, AU - Shaheen,Muhammad Ashraf, Y1 - 2009/08/21/ PY - 2009/02/11/received PY - 2009/07/28/revised PY - 2009/08/17/accepted PY - 2009/9/8/entrez PY - 2009/9/8/pubmed PY - 2010/2/18/medline SP - 149 EP - 55 JF - Colloids and surfaces. B, Biointerfaces JO - Colloids Surf B Biointerfaces VL - 75 IS - 1 N2 - Biosorption of divalent metal ions, i.e. Pb(II), Cd(II), Zn(II) and Cu(II) onto rice husk activated (RHA) is investigated over pH range (1-10) via batch adsorption technique. The chemical and thermal activation of rice husk with 0.1M HNO(3) and 1M K(2)CO(3) at 473 K enhanced the removal efficiency of RHA (35+/-2.1-99+/-0.5%, 33+/-1.2-97+/-0.6%, 32+/-1.3-96+/-0.8% and 28+/-1.8-95+/-0.9% before and after treatment, respectively). The surface area analysis of RHA by BET (Brunauer, Emmett and Teller) nitrogen adsorption method provided pore area and average pore diameter to be 542+/-2.3m(2)g(-1) and 1076+/-5.6 nm respectively. SEM and FTIR analyses of RHA were carried out to determine the surface morphology and functional groups involved in metal binding mechanism, respectively. The adsorption equilibrium was well described by Freundlich, Langmuir and Dubinin-Radushkevish (D-R) isotherm models by employing (4.8-48, 8.9-89, 15.3-153 and 15.7-157)x10(-5)M solution concentrations of sorbates, respectively, at equilibrium time of 20 min at pH 6 and onto 0.2g of sorbent. The kinetics of mass transfer and intra-particle diffusion for metal ions sorption onto RHA were studied with Lagergren and Morris-Weber kinetic models. The numerical values of thermodynamic parameters indicated the exothermic nature, spontaneity and feasibility of the sorption process. The desorption study of metal components from RHA surface was carried out with 0.1M HCl. The sorption mechanism developed illustrates the strong interactions of sorbates with the active sites of the sorbent coupled with efficient and environmentally clean exploitation of rice waste product. SN - 1873-4367 UR - https://www.unboundmedicine.com/medline/citation/19734025/An_economically_viable_method_for_the_removal_of_selected_divalent_metal_ions_from_aqueous_solutions_using_activated_rice_husk_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0927-7765(09)00384-1 DB - PRIME DP - Unbound Medicine ER -