噁草酮在液相中的光化学降解研究

Photodegradation of Oxadiazon in Various Solvents

摘要: 以高压汞灯为光源,研究了噁草酮在环己烷、甲醇、乙腈、丙酮及水溶液中的光化学降解。结果表明:在环己烷、甲醇、乙腈、水中, 噁草酮光降解效应显著,其半衰期分别为4.45、15.34、57.58、54.69 min; 噁草酮在丙酮溶剂中降解缓慢,半衰期为293.83 min;丙酮对噁草酮在水中的光解有显著的光敏作用,光敏效应与丙酮的量显著相关,光敏效率最高达95.84%。

Abstract: Under the high pressure mercury lamp,the photodegradation of oxadiazon in different solvents was studied. In cyclohexane, methanol, actonitrile and distilled water, the photolytic rate was rapid, the half-life of oxadiazon was 4.45, 15.34, 57.58 and 54.69 min. But the photolytic rate in acetone was slow; its half-life was 293.83 min. The photolysis of oxadiazon in water could be activated by acetone. The photoactive rate was found distinctly related to quantity of acetone.