Effect of ionic strength and pH on the adsorption of selected herbicides on Amberlite

被引：43
|
作者：
Kyriakopoulos, GL
Doulia, D
Hourdakis, A
机构：
[1] Natl Tech Univ Athens, Dept Chem Engn, GR-15780 Athens, Greece
[2] Benaki Phytopathol Inst, Lab Chem Anal Pesticides, GR-14561 Athens, Greece
来源：
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY | 2006年 / 86卷 / 3-4期
关键词：
adsorption; polymeric resins; pesticides; ionic strength; chromatography;
D O I：
10.1080/03067310500247678
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The effect of ionic strength on the adsorption of alachlor, trifluralin, and prometryn on Amberlite XAD-4 polymeric resin is studied. Static adsorption experiments are carried out at pH 3-6.5 and ionic strength 0.01-2M at 20 degrees C. By increasing the ionic strength, the adsorption of herbicides can be significantly increased. The electrolyte addition affects both the effectiveness and efficiency of adsorption, leading eventually to a saturation of the resin surface. An explanation of the alteration of adsorption mechanisms, caused by ionic strength, is given, based mainly on the reduction in repulsive forces at the resin-herbicide interface and between adsorbing herbicide molecules, since both resin and herbicides have a polar ring as part of their structure.
引用
收藏
页码：207 / 214
页数：8
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