An appraisal of methods for measurement of pesticide transformation in the groundwater zone

被引:6
|
作者
Leistra, M [1 ]
Smelt, JH [1 ]
机构
[1] Univ Wageningen & Res Ctr, Alterra Green World Res, NL-6700 AA Wageningen, Netherlands
关键词
aquifer; catalysis; degradation; drinking water; hydrolysis; metal species; microbial transformation; pH; redox potential; pesticide registration; subsoil;
D O I
10.1002/ps.295
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Laboratory and field studies show that pesticides may be transformed in the groundwater zone. Possible reaction mechanisms are chemical hydrolysis, catalytic reduction and aerobic or anaerobic microbial transformation. Transformation in the groundwater zone can be an important element in the advanced evaluation of the potential risk arising from a pesticide in the public drinking water supply. However, rate and pathway of transformation can show large differences, depending on the bio-geochemical conditions in the groundwater zone. Knowledge of the reaction mechanisms and the effect of aquifer conditions would allow vulnerable and low-vulnerable application areas for a pesticide to be delimited. An outline is given of possible approaches to quantifying these transformation processes and using the results in registration procedures, especially in the EU and its member states. Furthermore, areas where there is need for continued research and better understanding are highlighted. (C) 2001 Society of Chemical Industry.
引用
收藏
页码:333 / 340
页数:8
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