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开展了采用TiO2为光催化剂、紫外灯光源,对焦化废水进行光催化降解的研究,主要探讨了光照反应时间、TiO2投加量、溶液 pH 值等因素对焦化废水TOC去除率的影响,并对光催化氧化机理进行探讨。结果表明：TiO2光催化氧化对焦化废水TOC去除效果明显,在光照反应时间3.5 h,TiO2投加量4.0 g/L,溶液 pH 值为6.3,TOC去除率超过49%。“,”TiO2 as photocatalyst and UV light source was used to conduct the photocata-lytic degradation for coking wastewater.The effects of irradiation reaction time,TiO2 dosage and initial pH in solution on TOC removal rate of wastewater were investigated, and the mechanism of photocatalyst was also discussed.The results showed that photo-catalytic oxidation process was effective for the TOC removal of coking wastewater,and TOC removal rate could reach more than 49 % under the conditions of irradiation time 3.5 h,TiO2 dosage 4.0 g/L,and initial pH 6.3.