Abstract: Studies on water quality of Haihe River Basin show that pentachlorophenol（PCP）has become the major organic pollutant. As a result，to control the pollution of PCP has become vital for the pollution control in Haihe River Basin. The influence factors of photocatalytic degradation of PCP were studied and analyzed. First，photocatalysis assisted by three oxidants（O2，H2O2，K2S2O8） was investigated in terms of techbnology，environmental impact and economy，and it showed that O2 was the optimal choice. The reaction conditions of photocatalysis，including pH of solution，circulation flow rate，light intensity，dosage of catalyst，were investigated with the orthogonal method. The result showed that circulation flow rate was the least significant factor for the reaction，and the degradation rate of photocatalytic reaction increased with the pH of solution and light intensity，and there was a peak of dosage of catalyst.

摘要： 研究者对海河流域水质的调查发现，五氯苯酚是检出量最多的持久性有机污染物，因此控制五氯苯酚污染对控制海河持久性有机污染起着非常关键的作用。为此本文对五氯苯酚光催化降解的影响因素进行实验研究和分析，首先对O2、H2O2、K2S2O8三种外加氧化剂在环境、工艺和经济三方面进行比较，研究表明O2（空气）是较好的选择。通过正交实验对光催化降解五氯苯酚的操作条件pH值、流量、光强、催化剂用量进行研究，结果表明，流量对光催化降解五氯苯酚的影响很小；光催化效果随着pH值得增加和光强的增加而增加；催化剂用量对光催化降解五氯苯酚的影响存在峰值。