Polyethyleneimine-containing sol-gels as novel sorbents for the removal of cadmium from aqueous solutions

被引：14

作者：

Bahrami, S

Bassi, AS ^{[1
]}

Yanful, E

机构：

[1] Univ Western Ontario, Fac Engn Sci, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada

[2] Univ Western Ontario, Fac Engn Sci, Dept Civil & Environm Engn, London, ON N6A 5B9, Canada

来源：

CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 1999年 / 77卷 / 05期

关键词：

polyethyleneimine; chelation; sol-gel; cadmium sorption;

D O I：

10.1002/cjce.5450770520

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The removal of cadmium ions from aqueous solutions is described using polyethyleneimine (PEI) entrapped in sol-gel matrices. The process is optimized with respect to operating conditions and both sorption and desorption are considered. The sorption process followed the Langmuir isotherm, and the corresponding Langmuir constants q(max) and K-d were found to be 80.64 mg Cd2+/g PEI and 236.36 mg/L, respectively, using the immobilized PEI polymer. More than 90% of the cadmium could be recovered in 2 h using 2 M NaCl solutions. This technique has potential applications in the recovery of cadmium in aqueous waste streams.

引用

页码：931 / 935

页数：5

共 31 条

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