光催化氧化法处理焦化废水中难以生物降解的有机毒物

Treatment of Nonbiodegradable Toxic Organic Substance in Coking Waste Water with photo—Catalytic Oxidation Method

焦化废水中加入催化剂,在紫外光照射下鼓入空气,可将包括多环芳烃在内的所有有毒物和颜色全部去除。通过实验获得的最佳光解条件为:反应时间50分钟,催化剂浓度0.375%,空气流量37ml/min.1,反应温度60℃,PH 值为2。影响反应的主要因素是 PH,温度和光照时间。此法具有去除能力很强,反应迅速等特点,颇有发展前途。

The coking waste water is treated with ultra-violet(UV)photo-cataly-tic oxidation method,and the experiments prove that all kinds of toxic po-lycyclic aromatic hydrocarbons and color of the waste water are destroyed.The optimal photo—catalytic oxidation conditions are determined—the react-ion tempertaure,60℃;the reaction time,50min.;the concentration of thecatalyst,0.375%;and air flow rate,37ml/min.l.The chief factors affectingthe reaction consist mainly of temperature,PH—value and time of UV pho-to-catalytic oxidation.