考察了不同温度、pH 值和水质条件下紫外/过硫酸盐(UV/PS)工艺光解 2，4-二 氯苯酚(2，4-DCP)的效果及一级反应动力学，探讨了预氧化工艺对 2，4-DCP 在氯和氯胺 消毒过程中生成的消毒副产物的种类和产量的影响． 结果表明:UV/PS 光解 2，4-DCP 的 45min 降解率可达 86. 4%，说明 UV/PS 工艺可高效去除 2，4-DCP，且其反应基本遵循拟 一级反应动力学;不同温度下，2，4-DCP 的降解率随温度的升高而增大，反应符合拟一级 反应动力学及阿累尼乌斯公式拟合模型，线性较好;pH 值从 5. 0 上升到 9. 0 的过程中，反 应速率常数先逐渐增大再降低，在 pH = 7. 0 时达最大值;锡澄水库原水、油车水库原水、 自来水、锡东水厂水源配制的 2，4-DCP 溶液的降解率分别是 73. 5%、80. 2%、82. 4%、 87. 4%;PS、UV、UV/PS 3 种工艺降解 2，4-DCP 溶液时，后续氯和氯胺消毒过程中生成的 含碳消毒副产物是三氯甲烷、二氯乙酸、三氯乙酸，生成的含氮消毒副产物主要是二氯乙 腈和三氯硝基甲烷;UV、UV/PS 工艺较大程度地降低了 2，4-DCP 作为前体物生成的消毒 副产物的总量．

The degradation efficiency and first-order reaction kinetics of 2,4-DCP with UV/PS process at 25 ℃,under different temperature and different pH conditions were investigated; meanwhile, the intermediate products and the possible reaction pathways of 2, 4-DCP degradation by UV/PS were speculated. The types and yields of disinfection by-products generated by oxidizing 2,4-DCP with PS,UV and UV/PS during chlor(am)tion processes. The results showed that the removal rate of 2, 4-DCP can reach as high as 86.4 % with UV/PS process, which indicated 2, 4-DCP can be highly degradated by UV/PS, and the reaction fitted the pseudo-first-order reaction equation. The degradation rate increased with the increase of temperature, fitted the first-order reaction kinetics and Arrhenius formula fitting model, the linear were better. PH value increased from 5 to 9, and the reaction rate constant first increased and then decreased, which was the highest at pH=7.0. The actual water including of Xi-cheng reservoir, You-che reservoir, Xi-dong water works and tap water were prepared as the background of 2, 4-DCP solution ,the photo catalytic oxidation degradation efficiency of 2,4-DCP solution were 73.5%, 80.2%, 82.4% and 87.4%, respectively. three kinds of carbonaceous disinfection by-products containing chloroform(CF) , two chloroacetic acid (DCAA)and acetic acid(TCAA), two kinds of nitrogen disinfection by-products containing dichloroacetonitrile (DCAN) and trichloronitromethane (TCNM) were determined with GC-MS during degradation 2,4-DCP by PS,UV and UV/PS processes with chlor(am)ination process, the UV and UV/PS process can significantly reduce the total yields of DBPs caused by 2,4-DCP as the precursor.