化工园区生化出水氯代烃污染物的臭氧氧化降解

以化工园区污水处理厂生化出水为背景水样,考察了臭氧氧化对2,4,6-三氯酚、氯苯、1,2-二氯苯、对硝基氯苯、四氯酞酸5种特征氯代烃污染物的降解效果,并对其降解动力学进行了分析。实验结果表明:臭氧对2,4,6-三氯酚和氯苯的降解效果最好,反应30 min时的去除率均接近100%,其次为1,2-二氯苯和对硝基氯苯,反应30 min时的去除率分别为95.7%和36.0%,最差为四氯酞酸,反应30 min时的去除率仅为8.9%;臭氧对2,4,6-三氯酚和对硝基氯苯的降解符合零级动力学方程,对氯苯和1,2-二氯苯的降解符合一级动力学方程,对四氯酞酸的降解符合二级动力学方程。

Degradation of chlorinated hydrocarbon pollutants in biochemical effluent from chemical industry park by ozonization

Using the secondary effluent from sewage treatment plant in chemical park as background water sample,the effects of ozone on degradations of 2,4,6-trichlorophenol,chlorobenzene,1,2-dichlorobenzene,p-nitrochlorobenzene and tetrachlorophthalic acid were investigated. The degradation kinetics was analyzed. The results show that：The degradation effect of ozone to 2,4,6-trichlorophenol and chlorobenzene was better and the removal rate of 2,4,6-trichlorophenol and chlorobenzene was both close to 100% after 30-min reaction,followed by 95.7% and 36.0% of 1,2-dichlorobenzene and p-nitrochlorobenzene,and that of tetrachlorophthalic acid was the least with only 8.9%;The degradation of 2,4,6-trichlorophenol and p-nitrochlorobenzene by ozone accords with the zero-order kinetic equation,while the degradation of chlorobenzene and 1,2-dichlorobenzene accords with the first-order kinetic equation and the degradation of tetrachlorophthalic acid accords with the second-order kinetic equation.