Adsorptive Removal of Cu(II) from Aqueous Solution using Non-Crosslinked and CrosslinkedChitosan-Coated Bentonite Beads

doi:10.1016/j.desal.2011.02.051

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Engineering and Science (including master's program) > Periodical Articles > Item 310902800/26982

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Title:	Adsorptive Removal of Cu(II) from Aqueous Solution using Non-Crosslinked and CrosslinkedChitosan-Coated Bentonite Beads
Authors:	Maria Lourdes, P.Dalida Ana Francia, V.Mariano Cybelle, M.Futalan Kan, Chi-Chuan Tsai, Wan-Chi Wan, Meng-Wei
Contributors:	環境工程與科學系
Keywords:	Adsorption isotherm Bentonite Chitosan Crosslinking Desorption
Date:	2011-07
Issue Date:	2013-10-16 09:08:38 (UTC+8)
Publisher:	Elsevier
Abstract:	Batch experiments were executed to investigate the removal of Cu(II) from aqueous solutions using non-crosslinked (CCB) and crosslinked chitosan-coated (CCB-ECH) bentonite beads. CCB and CCB-ECH beads were characterized by BET surface area and pore diameter analysis and X-ray diffraction (XRD). The percentage removal and adsorption capacity of Cu(II) ions were examined as a function of initial concentration and pH. The equilibrium data of CCB agreed well with the Langmuir model while CCB-ECH beads showed a better fit with the Freundlich model. Based on the isotherm study, CCB is a homogenous adsorbent, whereas CCB-ECH is a heterogeneous adsorbent. The adsorption capacities of CCB and CCB-ECH at pH 4 are 12.21 and 9.43 mg/g, respectively. The kinetic data correlated well with the pseudo-second order equation, which implies that chemisorption is the rate-limiting step. The desorption study was performed using eluent solutions, tap water (pH 7) and HCl solution (pH 1 and pH 3). The best Cu(II) recovery was obtained using HCl solution (pH 1).
Relation:	Desalination, 275(1-3), pp.337-343
Appears in Collections:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

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