UV-Fenton光催化氧化处理高浓度邻苯二甲酸二辛酯生产废水
Treatment of high concentration dioctyl phthalate (DOP) production wastewater by UV-Fenton process
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摘要: 采用UV-Fenton技术光催化氧化高浓度邻苯二甲酸二辛酯（DOP）生产废水，确定最佳操作条件为：初始pH=3.8，H2O2浓度为9.99 g/L，H2O2/Fe2+摩尔比为20∶1，光照反应60 min。此条件下的废水COD去除率为89.1%，出水COD值在570 mg/L左右。经正交试验确定影响处理效果各因素的重要性顺序为：H2O2浓度＞H2O2/Fe2+摩尔比＞光照反应时间＞pH。UV的加入与单独的Fenton体系存在正相关的协同作用。废水降解的表观过程符合一级反应动力学模式。Abstract: The UV-Fenton light catalysis oxidization process was adopted to treat a high concentration dioctyl phthalate (DOP) production wastewater. The optimal operation conditions were determined as follows: initial pH=3.8, H2O2concentration=9.99 g/L, H2O2/Fe2+ molar ratio=20∶1, and UV radiation time=60 min. The COD removal rate of the wastewater could reach 89.1% under above experimental conditions, and the effluent COD was approximately 570 mg/L. According to the orthogonal test results, the significance of various influencing factors followed the decreasing order: H2O2 concentration ＞H2O2/Fe2+ molar ratio ＞UV radiation time＞pH. UV radiation enhanced the treatment efficacy of the Fenton process. The apparent process of DOP degradation by UV-Fenton could be well expressed by the first order kinetic equation.
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