Photochemical degradation of carbaryl in various solvents | 甲萘威在液相中的光化学降解研究
2013
Wu Ni, Nanjing Agricultural University, Nanjing (China), College of Plant Protection | Liu Xiaofeng, Nanjing Agricultural University, Nanjing (China), College of Plant Protection | Wang Minghua, Nanjing Agricultural University, Nanjing (China), College of Plant Protection
中国人. 以高压汞灯为光源，研究了甲萘威在液相中的光化学降解及影响因素。结果表明：甲萘威在不同溶剂中的光解均符合一级动力学方程。甲萘威的光解速率随初始浓度的增加而减小。在不同有机溶剂中的光解速率大小依次为正己烷甲醇乙腈，在碱性溶液中比中性和酸性溶液中光解快。NO3-、NO2-和SDS对甲萘威光解有一定的抑制作用，而H2O2则对甲萘威在水中的光解起到促进作用。
显示更多 [+] 显示较少 [-]英语. The photochemical degradation of carbaryl in various solvents and the relevant effect factors were studied under the irradiation of high-pressure mercury lamp. The results showed that the photolysis rate of carbaryl could be characterized by first-order kinetics equation. The photolysis rate of carbaryl decreased with the increase of initial concentration. The photolytic rates of carbaryl in different organic solvents showed the following sequence: n-hexane methanol acetonitrile. The photolytie rate of carbaryl in alkaline buffer solution was much greater than in acid or in neutral buffer solution. The presence of NO3-, NO2- and SDS inhibited carbaryl photodegradation. The H2O2 could increase photolysis rate.
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