Adsorption of Cd(II) ion and its complex compounds from solution on the surface of charcoal treated with an oxidation-negative ionizing method

被引:18
作者
Mu, GN [1 ]
Tang, LB [1 ]
机构
[1] Yunnan Univ, Dept Chem, Kunming 650091, Peoples R China
关键词
cadmium ion (II); activated charcoal; adsorption; complex; method of oxidation-negative ionizing;
D O I
10.1006/jcis.2001.8078
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The adsorption characteristics of Cd(II) from electrolytic solution by activated charcoal have been investigated. It was found that the amount of adsorption of Cd(II) depends mainly on the pH value of the solution, the number of added inorganic ions, and oxygen-containing groups on the surface. The activated charcoal was treated with the oxidation-negative ionizing (OA) method to produce more oxygen-containing groups on the surface. The adsorption amount of Cd(II) on the treated activated charcoal increased remarkably. It was also found that the more powerful the acidity of the surface and the larger the adsorption amount of Cd(II), so the charged groups on the surface of activated charcoal are considered as the main adsorption-activated sites for inorganic ions. The adsorption characteristics of various complexes of Cd(II) on the surface of activated charcoal have also been investigated. Three types of adsorption configuration of the complexes of Cd(II) on the surface of activated charcoal were suggested according to the experimental results. (C) 2002 Elsevier Science (USA).
引用
收藏
页码:504 / 506
页数:3
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