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Removal of chromium hexavalent ion from aqueous solutions using biopolymer chitosan coated with poly 3-methyl thiophene polymer.
J Hazard Mater. 2010 Sep 15; 181(1-3):474-9.JH

Abstract

Adsorption capacity of Cr(VI) onto chitosan coated with poly 3-methyl thiophene synthesized chemically was investigated in a batch system by considering the effects of various parameters like contact time, initial concentration, pH and temperature. Cr(VI) removal is pH dependent and found to be maximum at pH 2.0. Increases in adsorption capacity with increase in temperature indicate that the adsorption reaction is endothermic. Based on this study, the thermodynamic parameters like standard Gibb's free energy (DeltaG degrees), standard enthalpy (DeltaH degrees) and standard entropy (DeltaS degrees) were evaluated. Adsorption kinetics of Cr(VI) ions onto chitosan coated with poly 3-methyl thiophene were analyzed by pseudo-first-order and pseudo-second-order models. The Langmuir, Freundlich and Temkin isotherms were used to describe the adsorption equilibrium studies of chitosan coated with poly 3-methyl thiophene at different temperatures. Langmuir isotherm shows better fit than Freundlich and Temkin isotherms in the temperature range studied. The results show that the chitosan coated with poly 3-methyl thiophene can be efficiently used for the treatment of wastewaters containing chromium as a low cost alternative compared to commercial activated carbon and other adsorbents reported. In order to find out the possibility of regeneration and reuse of exhausted adsorbent, desorption studies were also performed.

Authors+Show Affiliations

School of Industrial Technology, University Sains Malaysia, Penang, Pulau Pinang, Malaysia. sufiahena@yahoo.co.in

Pub Type(s)

Journal Article

Language

eng

PubMed ID

20627405

Citation

Hena, Sufia. "Removal of Chromium Hexavalent Ion From Aqueous Solutions Using Biopolymer Chitosan Coated With Poly 3-methyl Thiophene Polymer." Journal of Hazardous Materials, vol. 181, no. 1-3, 2010, pp. 474-9.
Hena S. Removal of chromium hexavalent ion from aqueous solutions using biopolymer chitosan coated with poly 3-methyl thiophene polymer. J Hazard Mater. 2010;181(1-3):474-9.
Hena, S. (2010). Removal of chromium hexavalent ion from aqueous solutions using biopolymer chitosan coated with poly 3-methyl thiophene polymer. Journal of Hazardous Materials, 181(1-3), 474-9. https://doi.org/10.1016/j.jhazmat.2010.05.037
Hena S. Removal of Chromium Hexavalent Ion From Aqueous Solutions Using Biopolymer Chitosan Coated With Poly 3-methyl Thiophene Polymer. J Hazard Mater. 2010 Sep 15;181(1-3):474-9. PubMed PMID: 20627405.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removal of chromium hexavalent ion from aqueous solutions using biopolymer chitosan coated with poly 3-methyl thiophene polymer. A1 - Hena,Sufia, PY - 2009/12/22/received PY - 2010/04/09/revised PY - 2010/05/10/accepted PY - 2010/7/15/entrez PY - 2010/7/16/pubmed PY - 2010/10/29/medline SP - 474 EP - 9 JF - Journal of hazardous materials JO - J Hazard Mater VL - 181 IS - 1-3 N2 - Adsorption capacity of Cr(VI) onto chitosan coated with poly 3-methyl thiophene synthesized chemically was investigated in a batch system by considering the effects of various parameters like contact time, initial concentration, pH and temperature. Cr(VI) removal is pH dependent and found to be maximum at pH 2.0. Increases in adsorption capacity with increase in temperature indicate that the adsorption reaction is endothermic. Based on this study, the thermodynamic parameters like standard Gibb's free energy (DeltaG degrees), standard enthalpy (DeltaH degrees) and standard entropy (DeltaS degrees) were evaluated. Adsorption kinetics of Cr(VI) ions onto chitosan coated with poly 3-methyl thiophene were analyzed by pseudo-first-order and pseudo-second-order models. The Langmuir, Freundlich and Temkin isotherms were used to describe the adsorption equilibrium studies of chitosan coated with poly 3-methyl thiophene at different temperatures. Langmuir isotherm shows better fit than Freundlich and Temkin isotherms in the temperature range studied. The results show that the chitosan coated with poly 3-methyl thiophene can be efficiently used for the treatment of wastewaters containing chromium as a low cost alternative compared to commercial activated carbon and other adsorbents reported. In order to find out the possibility of regeneration and reuse of exhausted adsorbent, desorption studies were also performed. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/20627405/Removal_of_chromium_hexavalent_ion_from_aqueous_solutions_using_biopolymer_chitosan_coated_with_poly_3_methyl_thiophene_polymer_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(10)00620-5 DB - PRIME DP - Unbound Medicine ER -