中文摘要：

考察了在玫瑰红（RB）存在下γ-六氯环己烷（γ-HCH）在冰中的光降解.结果表明,光敏剂RB通过其激发态[RB]＊及其产生的1O2＊加速了γ-HCH的光降解,RB浓度是影响光降解率最显著的因素;γ-HCH在较低初始浓度下的光敏化降解更快;无机盐离子的种类和浓度可以改变冰表面上类液层（LLL）的比例从而影响γ-HCH的光解.通过分析γ-HCH光降解产物提出了RB存在时冰中γ-HCH的光降解作用机理.

英文摘要：

Rose bengal （ RB ） -sensitized photolysis of gamma-hexachlorocyclohexane （γ-HCH ） in ice was investigated. The results show that the photosensitizer RB accelerate the photolysis of γ-HCH by the excited state [ RB ] ＊ and its product singlet oxygen （1O2 ＊ ）, and RB concentration is the most significant factor affecting the photolysis rate; the sensitized photolysis of γ-HCH at lower initial concentrations on the μg/L scale is faster; the type and concentration of inorganic salts can change the proportion of liquid like layer （LLL） on the surface of ice and thus affect the photolysis of γ-HCH. Based on the results above, the photo- products were analyzed and the sensitized photolysis mechanism of γ-HCH in the presence of RB was pro- posed.