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研究了噻虫啉的主要环境行为,水解、土壤降解、吸附及移动特性。结果表明:噻虫啉在25、50℃下,pH值4、7、9的水溶液中水解半衰期分别为47.2、59.8、72.2d和55.9、57.2、39.8d,较易水解;土壤中的降解半衰期分别为东北黑土7.5d,太湖水稻土14.2d,江西红壤土18.7d,较易降解;噻虫啉在3种供试土壤中的吸附性较弱,在东北黑土和太湖水稻土中移动性较弱,江西红壤土中移动性较强。
The main environmental behavior, hydrolysis, soil degradation, adsorption and migration characteristics of thiacloprid were studied. The results showed that the half life of thiacloprid in aqueous solution of pH 4, 7 and 9 was 47.2, 59.8, 72.2 d and 55.9, 57.2, 39.8 d respectively at 25 and 50 ° C, which was easier to hydrolyze; the degradation half-life in soil They were 7.5 days in northeastern China, 14.2 days in Taihu Lake paddy soil and 18.7 days in Jiangxi red loam soil, respectively. The adsorption capacity of thiacloprid was weak in the three soils, and the mobility was weak in the black soils of the northeast and Taihu paddy soils , Jiangxi red soil strong mobility.