Highly efficient removal of copper ions from water by using a novel alginate-polyethyleneimine hybrid aerogel

被引：42

作者：

Wang, Min ^{[1
]}

Yang, Qi ^{[1
]}

Zhao, Xiuqin ^{[1
]}

Wang, Zhuqing ^{[1
]}

机构：

[1] Anqing Normal Univ, Coll Chem & Chem Engn, Anqing 246133, Peoples R China

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2019年 / 138卷

关键词：

Copper ion; Polyethyleneimine; Sodium alginate; HEAVY-METAL IONS; ADSORPTION; CU2+; PB2+; WASTEWATERS;

D O I：

10.1016/j.ijbiomac.2019.07.160

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：

In this study, a novel alginate-polyethyleneimine hybrid aerogel (Alg-PEI) that could remove Cu2+ from waste-water was prepared by using a simple one-step synthesis and vacuum freeze-drying technology. As-prepared Alg-PEI exhibited high affinity and selectivity toward Cu2+ and could take up 95.1% of the Cu2+ in a 0.1 mM Cu2+ solution. The selectivity coefficients of Alg-PEI for Cu2+ exceeded 10 even in the presence of Co2+, Fe2+, Cr3+, or Cd2+. The maximum adsorption capacity of the AIg-PEI for Cu2+ reached 214.4 mg/g, which is higher than that of most reported Cu2+-sorbents. Moreover, AIg-PEI could be regenerated by simple acid-washing and used repeatedly. Analysis of the adsorption mechanism of the aerogel revealed that AIg-PEI binds Cu2+ mainly through ion exchange and chemical coordination effects. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：1079 / 1086

页数：8

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