Adsorption of Cd(II) and Pb(II) onto functionalized formic lignin from sugar cane bagasse

被引：120

作者：

Peternele, WS ^{[1
]}

Winkler-Hechenleitner, AA ^{[1
]}

Pineda, EAG ^{[1
]}

机构：

[1] Univ Estadual Maringa, Dept Quim, BR-87020090 Maringa, Parana, Brazil

来源：

BIORESOURCE TECHNOLOGY | 1999年 / 68卷 / 01期

关键词：

carboxymethylated lignin; cadmium; lead;

D O I：

10.1016/S0960-8524(98)00083-2

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The effects of temperature, pH and ionic strength on adsorption of Cd(II) and Pb(II) onto carboxymethylated lignin from sugar cane bagasse have been studied. Adsorption equilibrium data obtained using the batch technique were fitted to the Langmuir model. A factorial design showed that the most important variables are temperature and ionic strength for the Pb(II) adsorption in single and binary system respectively. For both metals, maximum binding capacity decreased with the ionic strength increase. Increasing pH the Pb(II) adsorption is enhanced. Carboxymethylated lignin adsorbed Pb(II) selectively at pH 6.0, 30 degrees C and 0.1 mol dm(-3) of ionic strength. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.

引用

页码：95 / 100

页数：6