Removal of copper ions from aqueous solution by adlai shell (Coix lacryma-jobi L.) adsorbents

doi:10.1016/j.biortech.2015.06.018

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Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/29670

Title:	Removal of copper ions from aqueous solution by adlai shell (Coix lacryma-jobi L.) adsorbents
Authors:	de Luna, Mark Daniel G. Flores, Edgar D. Cenia, Marie Chela B. Lu, Ming-Chun
Contributors:	環境資源管理系
Keywords:	Adlai shell Adsorption Heavy metal wastewater Kinetics Isotherm
Date:	2015-09
Issue Date:	2016-04-19 19:04:01 (UTC+8)
Publisher:	Elsevier Sci Ltd
Abstract:	Adlai shell (Coix lacryma-jobi L.) adsorbents (ASA) were used to remove copper ions from aqueous solutions under batch conditions. The effect of physical and chemical modification of ASA on Cu(II) removal was evaluated. Results showed that the high coefficients of determination for the pseudo-second order (R-2 > 0.9999) and for the intraparticle diffusion (R-2 > 0.9843) equations indicate that the rate-determining step is a combination of pore diffusion and chemisorption at low Cu(II) concentration and boundary layer, pore diffusion and chemisorption at high Cu(II) concentration. At 298 K and 100 mg L-1 Cu(II), the computed q(e) and k(2) values were 17.2 mg g(-1) and 0.012 g mg(-1) min(-1), respectively. The Freundlich model (R-2 > 0.9636) adequately describes the experimental data indicating heterogeneous adsorption. Overall, the results of the study demonstrate the potential of adlai shell adsorbents for the removal of heavy metals from aqueous solutions. (C) 2015 Elsevier Ltd. All rights reserved.
Relation:	Bioresource Technology, v.192, pp.841-844
Appears in Collections:	[Dept. of Environmental Resources Management] Periodical Articles

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