Chelating adsorption properties of PEI/SiO2 for plumbum ion

被引：58

作者：

An, Fuqiang ^{[1
]}

Gao, Baojiao ^{[1
]}

机构：

[1] N Univ China, Dept Chem Engn, Taiyuan 030051, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 145卷 / 03期

关键词：

polyethyleneimine; silica gel; chelating adsorption; plumbum ion;

D O I：

10.1016/j.jhazmat.2006.11.051

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this paper, a novel adsorption material PEI/SiO2 with strong adsorption ability towards heavy-metal ions was prepared. In preparation of PEI/SiO2, functional macromolecule polyethyleneimine (PEI) was grafted onto the surfaces of silica gel particles via the coupling effect of gamma-chloropropyl trimethoxysilane (CP). The adsorption properties of PEI/SiO2 for Pb2+ ion were studied by both static and dynamic methods. The experimental results show that PEI/SiO2 possesses very strong adsorption ability for Pb2+ ion, the saturated adsorption amount could reach to 17.5 mg g(-1), and the empirical Langmuir isotherm was found to describe well the equilibrium adsorption data. The pH and grafting amount of PEI have great influence on the adsorption amount. The Pb2+ ions adsorbed on PEI/SiO2 are eluted easily by diluted hydrochloric acid solution. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：495 / 500

页数：6

共 20 条

[1] Modification of the cation exchange resin properties by impregnation in polyethyleneimine solutions - Application to the separation of metallic ions [J].