Synthesis of ethylenediamine modified chitosan microspheres for removal of divalent and hexavalent ions

被引：44
作者：
Chethan, P. D.
Vishalakshi, B.
机构：
[1] Department of Post-Graduate Studies and Research in Chemistry, Mangalore University, Mangalagangothri, DK, Karnataka
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2015年 / 75卷
关键词：
Synthesis; Adsorption; Desorption; Microspheres; Isotherm models; CROSS-LINKED CHITOSAN; AQUEOUS-SOLUTION; COMPETITIVE ADSORPTION; METAL-IONS; CU(II); EQUILIBRIUM; COPPER(II); KINETICS; ZN(II); PB(II);
D O I：
10.1016/j.ijbiomac.2015.01.032
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Ethylenediamine modified chitosan was obtained in the form of microspheres by chemical crosslinking with gluteraldehyde and evaluated for the effective removal of metal ions. The present modification results in additional nitrogen centers which function as potential binding sites and the microsphere form enhances the specific surface area during adsorption of metal ions. The adsorbent was used in batch experiments to evaluate the adsorption of Cu(II), Zn(II), Pb(II) and Cr(VI) in a individual metal salt solutions. The samples exhibited highest affinity for Cu(II) and least for Cr(VI) ions. The adsorption data were interpreted based on Langmuir and Freundlich isotherm models. The maximum adsorption capacity obtained from Langmuir model is 60.9 mg g(-1). The modified microspheres can be regenerated with high efficiency, suggesting that this adsorbent is satisfactory to reuse. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：179 / 185
页数：7
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