| 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 |
| 摘要点击 1414 全文点击 881 投稿时间：2015-07-05 修订日期：2015-08-28 |
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| 中文关键词 苯胺类化学品 生物降解 动力学 DOC 水力停留时间 |
| 英文关键词 aniline chemicals biodegradation kinetics DOC hydraulic retention time |
| 作者 | 单位 | E-mail | | 古文 | 南京工业大学化学与分子工程学院, 南京 211816
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 | guwen_1224@163.com | | 周林军 | 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
南京工业大学环境学院, 南京 211816 | | | 刘济宁 | 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 | ljn@nies.org | | 陈国松 | 南京工业大学化学与分子工程学院, 南京 211816 | gschen3303@sina.com | | 石利利 | 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 | | | 徐炎华 | 南京工业大学环境学院, 南京 211816 | |
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| 中文摘要 |
| 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. |
| 英文摘要 |
| 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% and 88.3%, 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 (3g ·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. |
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