雾化-UV/O_3氧化TNT废水的实验研究

STUDY ON TNT WASTEWATER TREATMENT BY THE METHOD OF SPRAYING AND UV/O_3

为了提高臭氧利用效率,寻求一种更加有效的处理TNT废水的方法。实验采用雾化和UV/O3氧化相结合,通过雾化头把废水打成雾状,同时,在装置中通入O3,引入紫外光,在装置中进行雾化-氧化。实验表明:整个体系中,液滴粒径、TNT浓度、pH值、反应时间等因素对TNT去除率影响最大。实验得到的最佳反应条件为:液滴粒径控制在50μm,TNT浓度为50mg/L;pH值为8.0;臭氧反应时间30min,TNT去除率达到94.34%。本实验采用雾化-UV/O3氧化TNT废水,取得了很好的去除效果。该方法对其他工业废水的处理具有借鉴意义。

In order to improve the ozone utilization efficiency,and find out a more effective treatment process for the TNT wastewater,the experiment adopted the associative method of atomization and UV/O_3,the wastewater was atomized through pressure-type nozzle and low pressure pump.Meanwhile,O_3 was sent to the system,and UV ray was used in the experiment.The result showed that the effects of reaction condition such as drop size,pH value,reaction time and concentration of TNT were important to the removal rate of nitrobenzene in the system.The research result showed the associative method of multilevel atomization and UV/O_3 was effective to remove TNT wastewater.The optimum reaction conditions were as follows:the drop size was 50 micrometer;the concentration of TNT was 50 mg/L;pH was about 8.0;reaction time was 30 min.The removal rate of TNT reached 94.34%.The method was used as a reference for other industrial wastewater treatment.