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Ecotoxicol Environ Saf. 2016 Jul;129:154-63. doi: 10.1016/j.ecoenv.2016.01.014. Epub 2016 Mar 29.

Sorption of copper onto low molecular weight chitosan derivative from aqueous solution.

Author information

1
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; Department of Ecological Agriculture, Bolgatanga Polytechnic, Bolgatanga, Ghana. Electronic address: pierrodecota@hotmail.com.
2
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
3
Department of Ecological Agriculture, Bolgatanga Polytechnic, Bolgatanga, Ghana.
4
School of Agriculture, University of Cape Coast, Cape Coast, Ghana.
5
Geology Department, MMG, Golden Grove, PMB 7, Geraldton, WA, Australia.
6
Hainan Provincial Key Lab of Fine Chemistry, Hainan University, Haikou 570228, China.
7
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; Hainan Provincial Key Lab of Fine Chemistry, Hainan University, Haikou 570228, China. Electronic address: qzhang@ujs.edu.cn.

Abstract

In this study, sorption of copper onto low molecular weight chitosan derivative was studied. Experimental parameters such as pH of the solution (A), temperature (B), dose of the sorbent (C), and concentration of solution (D) were considered. The statistical results indicated that the dose of sorbent (C) and Cu (II) concentration (D) influenced removal efficiency at 5% significance level. Also, some interactions such as ABCD, ACD, ABC and AC affected the removal process. The sorbent was characterized with FTIR, SEM and TG/DSC. Freundlich isotherm model was the best isotherm model. The kinetic study results correlated well with the pseudo-second-order model. The thermodynamic studies revealed that the nature of copper sorption was spontaneous and endothermic. Strong affinity of the sorbent for copper (II) was revealed by the Isothermal Titration Calorimetry (ITC) technique.

KEYWORDS:

Chitosan derivative; Copper; Isotherms; Sorption; Thermodynamics

PMID:
27039244
DOI:
10.1016/j.ecoenv.2016.01.014
[Indexed for MEDLINE]

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