紫外-微臭氧工艺降解饮用水中邻氯对硝基苯胺的研究  

DEGRADATION OF 2-CHLORO-4-NITROANILINE IN DRINKING WATER BY UV-MICROO_3 REACTOR

作　　者：周易[1] 张冬 单国平 吕锡武[1] 

机构地区：[1]东南大学能源与环境学院,南京210096 [2]南京市自来水总公司,南京210002

出　　处：《环境工程》2013年第S1期192-195,共4页Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项资助项目(2008ZX07421-004)

摘　　要：以水中持久性有机物邻氯对硝基苯胺为目标物质,用紫外-微臭氧工艺对其进行降解,同时研究了紫外,紫外-臭氧和紫外-空气三种工艺的降解效果。结果表明:紫外-微臭氧工艺对水中持久性有机物的降解过程符合一级动力学反应。对于邻氯对硝基苯胺的3种初始浓度0.625,1.32,3.125 mg/L,紫外-微臭氧去除率分别达71.4%、78.8%、54.5%,降解效果低于紫外-臭氧工艺,但远好于其余三种工艺。紫外-微臭氧工艺的去除效果受到初始浓度,叔丁醇和初始pH值的影响。初始浓度在1.32 mg/L时去除率最高,初始浓度不应过高或者过低。加入叔丁醇使得去除率下降13%~31%。随着pH由4增加到9,去除率逐渐升高,较高的pH值有利于反应的进行。The degradation of 2-Chloro-4-nitroaniline by UV-microO3,UV,UV/O3and UV/air was investigated in this paper. The results indicate that the degradation by UV-microO3 followed pseudo-first order kinetics. With the initial concentrations of 0. 625 mg/L,1. 32 mg/L and 3. 125 mg/L,the removal rates were 71. 4%,78. 8% and 54. 5%,respectively,which were lower than that of UV/O3,but much higher than that of other three methods. The removal rates were affected by initial concentrations,tert-Butanol and initial pH. According to the experiments,initial concentrations should be kept in a proper level,that is to say,neither too high nor too low,to reach expected results. With tert-Butanol in the reactor,the removal rates decreased by about 13%~31%. As the pH increased from 4 to 9,the removal rates increased,which means higher pH is beneficial to the removal of 2-Chloro-4-nitroaniline.

关 键 词：邻氯对硝基苯胺 紫外-微臭氧工艺 

分 类 号：X703[环境科学与工程—环境工程]