3种苯胺类化学品在好氧污水处理模拟系统中的降解特性  

Degradation Characteristics of Three Aniline Compounds in Simulated Aerobic Sewage Treat System

作　　者：古文 周林军[2,3] 刘济宁[2] 陈国松[1] 石利利[2] 徐炎华[3] 

机构地区：[1]南京工业大学化学与分子工程学院,南京211816 [2]环境保护部南京环境科学研究所,国家环境保护农药环境评价与污染控制重点实验室,南京210042 [3]南京工业大学环境学院,南京211816

出　　处：《环境科学》2016年第1期240-246,共7页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(2013AA060A308);环境保护公益性行业科研专项(201309028)

摘　　要：采用好氧生化污水处理模拟实验方法,研究了不同水力停留时间(hydraulic retention time,HRT)下4-硝基苯胺、4-异丙基苯胺和2-氯-4-硝基苯胺的去除率.结果表明,HRT为6 h、12 h和24 h时,系统DOC去除率依次为70.2%、80.3%和88.3%,4-硝基苯胺去除率分别为48%、64.7%和75%,4-异丙基苯胺的去除率分别为66%、76%和91%,提高HRT可促进溶解性有机碳和苯胺类化学品的去除.2-氯-4-硝基苯胺在不同HRT条件下较难去除,去除率平均值低于20%.生物降解动力学实验结果表明,4-硝基苯胺、4-异丙基苯胺和2-氯-4-硝基苯胺在3 g·L^(-1)好氧活性污泥中的降解符合一级动力学方程,回归系数大于0.95,生物降解半衰期依次为6.01 h、16.16 h和123.75 h.异丙基对苯胺类化学品生物降解具有积极作用,而硝基和氯原子等基团抑制生物降解性.The removal rates of 4-nitroaniline,4-isopropyl aniline and 2-chloro-4-nitroaniline under different hydraulic retention time（HRT） were tested by employing a simulation method of aerobic biochemical sewage treatment technology in this study.The results showed that when HRT was 6 h,12 h,and 24 h,the removal rates of dissolved organic carbon（DOC） were 70.2%,80.3%and88.3%,the removal rates of 4-nitroaniline were 48%,64.7%and 75%;and the removal rates of 4-isopropyl aniline were 66%,76%and 91%,respectively.It was concluded that increasing HRT could promote the removal rates of DOC and aniline chemicals.In contrast,2-chloro-4-nitroaniline was difficult to be removed.The removal rates were less than 20%under all tested conditions.The kinetics analysis showed that the biodegradation of 4-nitroaniline,4-isopropyl aniline and 2-chloro-4-nitroaniline in aerobic activated sewage（3 g·L^-1） accorded with the first order kinetics and the regression coefficients were 0.95.The half-life time of biodegradation was 6.01 h,16.16 h,123.75 h,respectively.In general,functional groups such as isopropyl had a positive effect on the biodegradation of aniline chemicals,whereas substituents such as nitro group and chlorine atom had an inhibitory effect.

关 键 词：苯胺类化学品 生物降解 动力学 DOC 水力停留时间 

分 类 号：X703.1[环境科学与工程—环境工程] X824