Measurement of binding constants of poly(ethylenimine) with metal ions and metal chelates in aqueous media by ultrafiltration

被引：84

作者：

Juang, RS

Chen, MN

机构：

[1] Department of Chemical Engineering, Yuan-Ze Institute of Technology, Nei-Li

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1996年 / 35卷 / 06期

关键词：

D O I：

10.1021/ie950551b

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Equilibrium constants for the binding of poly(ethylenimine) (PEI) with metal ions and metal chelates of ethylenediaminetetraacetic acid and nitrilotriacetic acid in the aqueous sulfate solutions were determined by batch ultrafiltration (UF) in the pH range of 3.0-3.8. The average coordination number of PEI groups interacting with one metal ion and metal chelate was also obtained by varying the initial concentration ratio of PEI to metal ion. A simple chemical equilibrium model proposed in this work enabled us to satisfactorily predict the rejection coefficient of UF of metal ions and metal chelates in the presence of PEI. Also, the effect of the formation of soluble hydroxy complexes of metal chelates on their retention was emphasized.

引用

页码：1935 / 1943

页数：9

共 32 条

[1] THE DIAFILTRATION METHOD FOR THE STUDY OF THE BINDING OF MACROMOLECULES TO HEAVY-METALS [J].