Effect of pH and Ionic Strength on the Adsorption of Antimony(III) on Kaolinite

被引：0
|
作者：
Xi Jianhong [1 ]
He Mengchang [1 ]
机构：
[1] Beijing Normal Univ, State Key Lab Water Environm Simulat, Sch Environm, Beijing 100875, Peoples R China
来源：
PROGRESS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY, VOL II, PTS A AND B | 2009年
关键词：
Sb(III); adsorption; kaolinite; ionic strength; pH; ATOMIC FLUORESCENCE SPECTROMETRY; HUMIC-ACID; OXIDATION; SOIL; SPECIATION; GOETHITE; SB(III);
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The present work investigated the adsorption and mobility (desorption) of Sb(III) on kaolinite using batch experiments. The adsorption of Sb(III) on kaolinite was studied as a function of contact time, pH, ionic strength (I) and initial Sb(III) concentration. Kinetic studies suggest that the equilibrium is achieved within 24 h. The absorption of Sb(III) was strongly affected by changes in I at low ionic strength and unaffected at high ionic strength. The adsorption is strongly dependent on pH and decreases with increasing of pH. Desorption depends on the original suspension pH. The adsorption data fit well the Freundlich isotherm. The thermodynamic parameters determined were the equilibrium constant, K-eq=0.0755, and the Gibb's free energy, Delta G(0)=6.403.
引用
收藏
页码：431 / 435
页数：5
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