Applicability of adsorption models to the study of copper behaviour in clayey soils.

被引:76
|
作者
Sodré, FF
Lenzi, E
da Costa, ACS
机构
[1] Univ Estadual Maringa, Dept Quim, BR-87020900 Maringa, Parana, Brazil
[2] Univ Estadual Maringa, Dept Agron, BR-87020900 Maringa, Parana, Brazil
来源
QUIMICA NOVA | 2001年 / 24卷 / 03期
关键词
adsorption isotherms; heavy metal; tropical soils;
D O I
10.1590/S0100-40422001000300008
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
It was evaluated the applicability of Langmuir, Freundlich and Temkin models to copper adsorption in three classes of soils. Fractions of each soil were added to test tubes containing growing concentrations of the metal in solution. The tubes were shaken and the copper concentrations were determined in the extracts by atomic absorption spectrometry (AAS). The models offered a good fit for the experimental data indicating that presence of silicated clay had high influence on copper sorption. The Langmuir isotherm showed high influence of the organic matter in the absorption phenomenon. It was evidenced the importance of further studies related to Temkin model.
引用
收藏
页码:324 / 330
页数:7
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