Adsorption of copper and lead in aqueous solution onto bentonite modified by 4′-methylbenzo-15-crown-5

被引：79

作者：

Liu Yun ^{[1
]}

Shen Xing ^{[1
]}

Xian Qiming ^{[1
]}

Chen Haidong ^{[1
]}

Zou Huixian ^{[1
]}

Gao Shixiang ^{[1
]}

机构：

[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210093, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2006年 / 137卷 / 02期

基金：

中国国家自然科学基金;

关键词：

4 '-methylbenzo-15-crown-5; adsorption; bentonite; heavy metal;

D O I：

10.1016/j.jhazmat.2006.03.057

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorption of heavy metal ions (Cu2+ and Pb2+) onto organobentonite modified by 4'-methylbenzo-15-crown-5 (MB15C5) from bentonite compared with natural bentonite (N-Bentonite) is described in this paper. The kinetic parameters of the models are calculated and discussed, and closely fitted a pseudo-second-order model in all cases. For bentonite modified with MB15C5 (MB15C5-Bentonite) and N-Bentonite, the equilibrium data closely fitted the Langmuir model and showed the following affinity order: Pb2+ > Cu2+, and the adsorption capacity of MB15C5-Bentonite is higher than that of N-Bentonite for Pb2+ and Cu2+. The effect of pH is examined over the range 1.5-6. The adsorption of Cu2+ and Pb2+ increases with increasing pH and the adsorption of Cu2+ and Pb2+ reaches a maximum at pH 3.5-6. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1149 / 1155

页数：7

共 41 条

[1] Adsorption of heavy metals on Na-montmorillonite. Effect of pH and organic substances [J].