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

doi:10.1016/j.jhazmat.2014.04.043

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標題:	Adsorption of indium(III) ions from aqueous solution using chitosan-coated bentonite beads
作者:	Calagui, Mary Jane C. Senoro, Delia B. Kan, Chi-Chuan Salvacion, Jonathan W. L. Futalan, Cybelle Morales Wan, Meng-Wei
貢獻者:	溫泉產業研究所
關鍵字:	Indium Chitosan-coated bentonite beads Isotherms Kinetics
日期:	2014-07
上傳時間:	2015-05-06 21:18:24 (UTC+8)
出版者:	Elsevier Science Bv
摘要:	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.
關聯:	Journal of Hazardous Materials, v.277, pp.120-126
显示于类别:	[觀光事業管理系(含溫泉所)] 期刊論文

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