摘要
由农药在非饱和土壤中运移的一维弥散方程简化,得出衰减因子--AF参数模型,评价了应用范围广、用量大、毒性高的7种农药对地下水污染的潜能,顺序为:乐果>甲胺磷>甲草胺>丁草胺>敌敌畏>甲基对硫磷>对硫磷,'有可能污染'的深度分别为:乐果>2 m、甲胺磷2 m、甲草胺1.5~2 m、丁草胺1 m、敌敌畏0.5 m、对硫磷和甲基对硫磷不污染地下水.
Attenuation Factor(AF)model was developed on the basis of simplifying one-dimensional transport-dispersion equation of pesticides in unsaturated root zone. Using AF as criterion,we assessed 7 widely and largely used pesticides of high toxicity and ranked them as follows: dimethoate〉methamidophos〉alachlor〉butachlor〉dichlorvos〉parathion-methyl〉parathion. The depth of possible pollution is〉2 m, 2 m, 1.5~ 2 m, 1 m and 0. 5 m for dimethoate, methamidophos, alachlor, b utachlor and dichlorvos. Parathionmethyl and parathion do not pollute groundwater.
出处
《安全与环境工程》
CAS
2005年第3期15-17,共3页
Safety and Environmental Engineering
基金
国家自然科学基金重点资助项目(49832005)
教育部优秀青年教师教学科研奖励计划资助项目
湖北省科技攻关计划资助项目。
关键词
农药
污染
地下水
衰减因子
pesticides
pollution
groundwater
attenuation factor