Removal of 2,4-D from aqueous solution by the adsorbents from spent bleaching earth

被引：26
|
作者：
Mahramanlioglu, M [1 ]
Kizilcikli, I [1 ]
Biçer, IÖ [1 ]
Tunçay, M [1 ]
机构：
[1] Univ Istanbul, Fac Engn, Dept Chem, TR-34850 Istanbul, Turkey
来源：
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES | 2000年 / 35卷 / 02期
关键词：
pesticides; 2,4-D; adsorption of pesticides; spent bleaching earth; boundary layer and intraparticle diffusion;
D O I：
10.1080/03601230009373263
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The removal of 2,4-D (2,4-dichlorophenoxyacetic acid) from aqueous solutions by activated spent bleaching earths (SBE) was studied at 20 degrees C. Experiments were performed as a function of time, initial concentration, dose and particle size of the adsorbent. The Langmuir and Freundlich adsorption equations were fitted by the adsorption data obtained. The values of Langmuir and Freundlich constants were determined. The adsorption kinetic was found to follow Lagergren equation. Both the boundary layer and intraparticle diffusion played important roles in the adsorption rate of 2,4-D. As the size of the adsorbent increased, the time to reach equilibrium increased but adsorption capacity decreased.
引用
收藏
页码：187 / 200
页数：14
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