Adsorption of cadmium(II) from an aqueous solution onto activated carbon cloth

被引：24

作者：

Leyva-Ramos, R ^{[1
]}

Diaz-Flores, PE ^{[1
]}

Aragon-Piña, A ^{[1
]}

Mendoza-Barron, J ^{[1
]}

Guerrero-Coronado, RM ^{[1
]}

机构：

[1] Univ Autonoma San Luis Potosi, Fac Ciencias Quim, Ctr Invest & Estudios Posgrado, San Luis Potosi 78210, SLP, Mexico

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2005年 / 40卷 / 10期

关键词：

activated carbon cloth; adsorption; cadium;

D O I：

10.1081/SS-200068485

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The effects of surface properties and solution pH and temperature oil the adsorption of cadmium(II) onto activated carbon fiber cloth (ACC) made from polyacrylonitrile (PAN) were investigated in this work. The ACC was oxidized with HNO3 solution and the concentration of acidic sites increased during oxidation whereas that of basic ones diminished. The adsorption capacity of the oxidized ACC was higher than that AA of ACC without oxidation because the ACC contained greater concentration of acidic sites. It was found that the maximum adsorption took place at pH 8 and the adsorption capacity increased near 22 times, augmenting the pH from 2 to 8. The adsorption capacity diminished on the average twofold, increasing the temperature front 15 to 35 degrees C. Cd(II) adsorbed on ACC at pH 6 can be almost completely desorbed by reducing the solution pH to 2. The adsorption capacity is considerably dependent upon the characteristics of the ACC surface and temperature and pH of the solution.

引用

页码：2079 / 2094

页数：16

共 28 条

[1] Adsorption of zinc, cadmium and mercury ions from aqueous solutions on an activated carbon cloth [J].