Adsorption mechanisms of carbofuran on silica: Structure, kinetics, and solubility influence

被引：13
作者：
Mear, AM [1 ]
LeSaint, J [1 ]
Privat, M [1 ]
机构：
[1] UNIV BRETAGNE OCCIDENTALE,URA CNRS 322,DEPT CHIM,UFR SCI & TECH,F-29285 BREST,FRANCE
来源：
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 1996年 / 35卷 / 02期
关键词：
D O I：
10.1006/eesa.1996.0096
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The adsorption processes of carbofuran from solutions in pure water onto silica (Aerosil 200) have been determined in order to bring greater coherence to previous results obtained directly on soils. Adsorption isotherms and their evolution with temperature reveal that adsorption is generally weak, increases with temperature, and does so significantly with concentration when the solubility limit is approached. Kinetics of dissoving, of adsorption on silica, and of desorption all obey an irreversible two-compartment model. Desorption rate Is slower than adsorption rate. Consequences on the behavior of carbofuran in the environment are discussed. (C) 1996 Academic Press, Inc.
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页码：163 / 173
页数：11
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