Removal of chromium hexavalent ion from aqueous solutions using biopolymer chitosan coated with poly 3-methyl thiophene polymer

Journal of Hazardous Materials
Sufia Hena

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 com...Continue Reading

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Citations

Jul 10, 2012·Journal of Hazardous Materials·Hang WangShoujian Li
Oct 13, 2015·International Journal of Biological Macromolecules·Venkatrajan Gopalakannan, Natrayasamy Viswanathan
Apr 1, 2014·International Journal of Biological Macromolecules·Rathinam Karthik, Sankaran Meenakshi
Aug 28, 2014·International Journal of Biological Macromolecules·Rathinam Karthik, Sankaran Meenakshi
Sep 28, 2014·International Journal of Biological Macromolecules·Rathinam Karthik, Sankaran Meenakshi
Mar 22, 2014·Environmental Technology·Sandip MandalRaj Kishore Patel
Jan 31, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Ruihua HuangBingchao Yang
Jan 8, 2018·Environmental Science and Pollution Research International·Yilin JiangQingyun He
Oct 28, 2011·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·A S Krishna KumarVidya Rajesh
Jul 9, 2017·Environmental Monitoring and Assessment·Pankaj GogoiTarun K Maji
Jan 3, 2019·Environmental Science and Pollution Research International·Livy LaysandraSuryadi Ismadji
Aug 3, 2021·Environmental Science and Pollution Research International·Sorth AnsariMuzamil Khatri

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