Adsorption of indium(III) ions from aqueous solution using chitosan-coated bentonite beads

doi:10.1016/j.jhazmat.2014.04.043

CNU IR > College of Sustainable Environment and Recreation > Dept. of Tourism Management > Periodical Articles > Item 310902800/28496

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/28496

Title:	Adsorption of indium(III) ions from aqueous solution using chitosan-coated bentonite beads
Authors:	Calagui, Mary Jane C. Senoro, Delia B. Kan, Chi-Chuan Salvacion, Jonathan W. L. Futalan, Cybelle Morales Wan, Meng-Wei
Contributors:	溫泉產業研究所
Keywords:	Indium Chitosan-coated bentonite beads Isotherms Kinetics
Date:	2014-07
Issue Date:	2015-05-06 21:18:24 (UTC+8)
Publisher:	Elsevier Science Bv
Abstract:	Batch adsorption study was utilized in evaluating the potential suitability of chitosan-coated bentonite (CCB) as an adsorbent in the removal of indium ions from aqueous solution. The percentage (%) removal and adsorption capacity of indium(III) were examined as a function of solution pH, initial concentration, adsorbent dosage and temperature. The experimental data were fitted with several isotherm models, where the equilibrium data was best described by Langmuir isotherm. The mean energy (E) value was found in the range of 1-8 kJ/mol, indicating that the governing type of adsorption of indium(III) onto CCB is essentially physical. Thermodynamic parameters, including Gibbs free energy, enthalpy, and entropy indicated that the indium(III) ions adsorption onto CCB was feasible, spontaneous and endothermic in the temperature range of 278-318 K. The kinetics was evaluated utilizing the pseudo-first order and pseudo-second order model. The adsorption kinetics of indium(III) best fits the pseudo-second order (R-2 > 0.99), which implies that chemical sorption as the rate-limiting step. (C) 2014 Elsevier B.V. All rights reserved.
Relation:	Journal of Hazardous Materials, v.277, pp.120-126
Appears in Collections:	[Dept. of Tourism Management] Periodical Articles

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