摘要
研究了光源种类、溶液pH、水温和表面活性剂对百菌清光解的影响.结果表明,百菌清水溶液在高压汞灯、紫外灯和太阳光照射下的光解半衰期分别为22.4、82.5和123.8min;在太阳光和高压汞灯照射下,百菌清在碱性溶液中比中性和酸性溶液中光解快;随着水温的升高,百菌清光解速率加快,水温平均每升高10℃,光解速率大约增大1倍.表面活性剂十二烷基磺酸钠、Tween60和Span20对百菌清的光解表现出显著的光敏化效应,十六烷基三甲基溴化铵对百菌清光解有强烈的光猝灭效应.
The study on the effects of light source, solution pH and temperature, and surfactant on the photochemical degradation of chlorothalonil showed that the half-life of chlorothalonil photodegradation under high pressure mercury lamp （ HPML）, UV lamp and sunlight was 22. 4, 82.5 and 123.8 min, respectively. Under HPML and sunlight, chlorothalonil had a higher photolysis rate in alkaline solution than in neutral and acid solution. The photolysin rste increased with increasing solution temperature in the range of 10 ℃ ～40 ℃, which was doubled when the temperature increased every 10 ℃. Sodium laurylsttheonate （SDS）, sodium dodeeylbenzene sulfonate （SDBS） , Tween 60 and Span 20 showed significant photosensitizing effects, while eetyhrimethylammonium bromide （CTAB） had significant photoquench effect on the photolysis of chlorothalonil.
出处
《应用生态学报》
CAS
CSCD
北大核心
2006年第6期1091-1094,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(20277001)
安徽省优秀青年基金资助项目(04041067).
关键词
百菌清
光源
PH
水温
表面活性剂
光化学降解.
Chlorothalonil, Light source, pH, Solution temperature, Suffaetant, Photochemical degradation.
