摘要
本文研究了杀虫双的降解、吸附和田间淋溶情况。结果表明:杀虫双在pH3—9范围内的水解反应极为缓慢,杀虫双在土壤中的降解主要是微生物作用下的生物降解过程,杀虫双和沙蚕毒素在太阳光下的降解作用很快。土壤对杀虫双的吸附量很少,而沙蚕毒素较易被土壤所吸附。田间试验结果证实了杀虫双具有很大的淋溶趋势,应对该农药的地下水污染予以重视。
Degradation, adsorption and field leaching of Dimehypo has been investigated. The results are as follows; hydrolysis of Dimehypo is very slow under pH range of 3 to 9. Degradation of Dimehypo is mainly microorganisms-related process. Furthermore, Dimehypo and Nereistoxin can be rapidly degraded under sunlight. Adsorption of Dimehypo by soils is negilible, while Nereistoxin can be sorbed to a large extent. Since field experiment has proved the considerable tendency of the pesticide to leach down the profile in the paddy field, particular attention should be paid to threats of Dimehypo posed to the groundwater.
出处
《环境化学》
CAS
CSCD
北大核心
1991年第3期47-53,共7页
Environmental Chemistry
