Competitive adsorption of Cd(II) and Zn(II) from aqueous solution onto activated carbon

被引：16
|
作者：
Leyva-Ramos, R [1 ]
Bernal-Jacome, LA [1 ]
Guerrero-Coronado, RM [1 ]
Fuentes-Rubio, L [1 ]
机构：
[1] UASLP, Fac Ciencias Quim, Ctr Invest & Estud Posgrado, San Luis Potosi 78210, Mexico
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 2001年 / 36卷 / 16期
关键词：
activated carbon; cadmium; competitive adsorption; single adsorption; zinc;
D O I：
10.1081/SS-100108355
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Single and simultaneous Cd(II) and Zn(II) adsorption isotherms from aqueous solution onto activated carbon were determined experimentally. Single isotherms for these ions fit the Langmuir isotherm well, and the maximum molar uptake of Zn(II) aver-aged 1.6 times that of Cd(II). The simultaneous adsorption isotherms also fit the bisolute Langmuir isotherm modified with an interaction factor. Adsorption of each single ion was reduced by the presence of the other ion, which competed for some of the same active sites. The Zn(II) isotherm proved to be more sensitive to the presence of the competing ion than did the Cd(II) isotherm.
引用
收藏
页码：3673 / 3687
页数：15
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