模拟苯胺废水的臭氧氧化过程初探  

Process of ozone oxidation of simulated aniline wastewater

作　　者：周珉 罗西子 ZHOU Min;LUO Xizi(Shanghai Chemical Industry Park Sino French Water Development Co.,Ltd.,Shanghai 201507,China)

机构地区：[1]上海化学工业区中法水务发展有限公司,上海201507

出　　处：《能源环境保护》2021年第2期24-29,共6页Energy Environmental Protection

摘　　要：为了提高苯胺废水处理效果,采用臭氧氧化静态试验处理模拟苯胺废水,分析了污染物去除效果和反应机理。结果表明:苯胺去除率随臭氧投加量增加而提高,当臭氧投加量116 mg/L时,苯胺去除率、COD去除率和TOC去除率分别达到99.9%、64.5%和10.8%;最佳反应pH值为7。在臭氧投加量逐步增加至116 mg/L时,氨氮浓度由7.65 mg/L升至23.33 mg/L,总氮、亚硝酸盐氮和硝酸盐氮的浓度无明显变化;苯胺氧化是臭氧直接氧化和间接氧化共同作用的结果,反应过程中产生的马来酸导致pH下降,苯胺反应过程中的副产物主要是醌类和亚胺类。This study deals with laboratory-scale ozone oxidation test of simulated aniline wastewater.Relevant water quality indicators have been analyzed,including p H,TOC,COD,N-related parameters(ammonium,TKN,nitrite,nitrate),aniline,nitrobenzene and color.Results show that all indicators reveal different change trend in process of reaction.Meanwhile,preliminary investigation on its mechanism has also been conducted by referring to change of each indicator.Finally,some advice has been given to improve engineering design.In order to improve the treatment effect of aniline wastewater,the ozone oxidation static test was used to treat simulated aniline wastewater.The pollutant removal efficiency and reaction mechanism were analyzed.The results show that the removal rate of aniline increases with the increase of ozone dosage.When the ozone dosage is 116 mg/L,the removal rates of aniline,COD and TOC are 99.9%,64.5%and 10.8%,respectively.The optimum reaction pH is 7.When the ozone dosage gradually increases to 116 mg/L,the concentration of NH4+-N increases from7.65 mg/L to 23.33 mg/L,but the concentrations of TN,NO2--N and NO3--N have no significant change.Aniline oxidation is the result of direct oxidation and indirect oxidation of ozone.The maleic acid produced during the reaction process leads to the decrease of p H.Quinones and imines are the main by-products of oxidation reaction.

关 键 词：臭氧 苯胺 静态实验 

分 类 号：X703[环境科学与工程—环境工程]