Chelating adsorption properties of PEI/SiO2 for plumbum ion

被引：57
|
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
收藏
页码：495 / 500
页数：6
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