生态环境学报2009，Vol.18Issue(5)：1683-1687,5.
表面活性剂和金属离子对新农药硫肟醚光解的影响
Effect of several surfactants and metal ions on photodegradation of novel insecticide sulfoxime in aqueous solution
摘要
Abstract
Effect of several surfactants and metal ions on photodegradation of novel insecticide sulfoxime (code: HNPC-A9908) [O-(3-phenoxybenzyl)-2-methylthio-1-(4-chloro- phenyl) propyl ketone oxime] in aqueous solutions was studied under the irradia-tion of ultraviolet light (λ 254 nm) in the laboratory. Experimental results showed that photodegradation rate of sulfoxime in the aqueous solutions varied when the insecticide suifoxime was combined with the surfaetants and inorganic salts such as ABS-Ca, castor oil polyethylene glycol ether (BY), Tween 80, ferric chloride (Fe~(3+)), cupric sulfate (Cu~(2+)) and magnesium sulfate (Mg~(2+)) at 1:1 ratio, respectively. ABS-Ca exhibited a significant photoextinction effect on photolysis of sulfoxime in aqueous solution, BY showed some photosensitized effect, and Tween80's effect varied with the illumination time, showing a photosensitization at the illumination time of less than 40 min, photoextinction after 40min illumination time. Fe~(3+) made the photolysis of sulfoxime in aqueous solution fast showing an obvious photosensitized effect, and Cu~(2+) and Mg~(2+) resulted in slow photodecomposition of sulfoxime in the aqueous solution revealing a strong photoextinction. Half-life of sulfoxime photolysis in the solutions containing ABS-Ca, BY, Tween 80, Fe~(3+), Cu~(2+) and Mg~(2+) was 21.63, 34.42, 15.29, 9.85, 43.95 and 32.20 min, respectively, and 22.3 min in the pure water without any surfactants and metal ions.关键词
硫肟醚(HNPC-A9908)/光解/光猝灭效应/光敏化效应/表面活性剂/金属离子Key words
sulfoxime (HNPC-A9908)/ photolysis/ photoextinction effect/ photosensitization effect/ surfactants/ metal ions分类
资源环境引用本文复制引用
罗玲,欧晓明,裴晖,余淑英,王晓光..表面活性剂和金属离子对新农药硫肟醚光解的影响[J].生态环境学报,2009,18(5):1683-1687,5.基金项目
国家科技攻关重点项目(2001BA308A02-10 （）
2004BA308A21-4) （）
湖南省自然科学基金项目(09JJ3015) （09JJ3015）
