Adsorption characteristics of copper(II) onto non-crosslinked and cross-linked chitosan immobilized on sand

doi:10.1080/19443994.2013.770191

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Engineering and Science (including master's program) > Periodical Articles > Item 310902800/27768

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Title:	Adsorption characteristics of copper(II) onto non-crosslinked and cross-linked chitosan immobilized on sand
Authors:	Hsien, Kuo-Jung Futalan, Cybelle M. Tsai, Wan-Chi Kan, Chi-Chuan Kung, Chun-Shuo Shen, Yun-Hwei Wan, Meng-Wei
Contributors:	環境工程與科學系
Keywords:	Crosslinking Chitosan Desorption Groundwater Isotherm
Date:	2013-08
Issue Date:	2014-05-26 10:42:53 (UTC+8)
Publisher:	Taylor & Francis Inc
Abstract:	In this study, Cu(II) removal using non-crosslinked and cross-linked chitosan-coated sand (CCS) from aqueous solution was investigated. To improve the mechanical and chemical stability, chitosan was coated onto sand (CCS) and cross-linked using epichlorohydrin (ECH) and ethylene glycol diglycidyl ether (EGDE). The effect of pH (2.0-5.0) on the adsorption capacity was examined. The maximum adsorption capacity of CCS, CCS-ECH, and CCS-EGDE occurred at an initial pH of 5.0, 4.0, and 5.0, respectively. The kinetic experimental data agreed well with pseudo-second order equation (R-2>0.988), which implies that chemisorption is the rate controlling step. Langmuir, Freundlich and Dubinin-Radushkevich were used to analyze the equilibrium data, where the Langmuir model provided the best fit for the isotherm data obtained using CCS, CCS-ECH, and CCS-EDGE (R-2>0.990). Adsorption-desorption was carried out using HCl solution (pH 1.0 and 3.0) and tap water (pH 7.0), where HCl solution (pH 1.0) provided the greatest recovery of Cu(II) at 98.3, 87.5 and 83.5% for CCS, CCS-ECH and CCS-EDGE, respectively. The removal of Cu(II) from real groundwater samples were studied, where removal of 57.4, 62.4 and 77.5% were achieved using CCS, CCS-ECH and CCS-EDGE.
Relation:	Desalination And Water Treatment, v.51 n.28-30 pp.5574-5582
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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