中文摘要：

以125W高压汞灯为光源，在低温（-12～-14℃）条件下研究了冰相中有亚硝酸盐存在时对氯苯酚（4-CP）的光转化反应．考察了各种因素对冰相中4-CP光转化的影响以及冰相中4-CP光转化的动力学和机理．实验结果表明，4-CP初始浓度、亚硝酸盐初始浓度、pH值和光强对冰相中4-CP光转化均有较大影响．在180min内，4-CP和总有机碳（TOC）的转化率分别达到80％和32％，在实验条件下，NO2ˉ的存在能够改变4-CP在冰相中光转化的产物和机理．

英文摘要：

Environmental photochemistry of organic pollutants is an important research field, but the ice photochemistry of organic pollutants is still a unknown field and it is attracting more and more attention recently. The ice photochemistry of p-chlorophenol（4-CP）, as an important pollutant, is studied a little. In this paper, the UV lamp（125 W high-pressure mercury lamp） was lamp-house and the photoreaction of 4-CP in ice was the object of this research. Some influencing factors and the kinetics and mechanism of the photoconversion was investigated in the range of the temperature of - 12- - 14 ℃ in the presence of nitrite. According to the results, the initial concentration of the 4-CP, the initial concentration of the nitrite, a commen photoreaction reagent in environment, the initial pH and the intensity of the light had serious effects on the conversion of the 4-CP. The disposal rates of 4-CP and TOC in ice respectively reached 80% and 32% within 180 min. Four reaction products are characterized by MS-GC analysis, it is not completely the same as that reported by other researchers. On this basis the photoconversion mechanism of 4-CP is deduced. It is concluded that the mecha- nism and photoproducts of 4-CP photoconversion in ice would be changed because of the presence of NO2ˉ