Characterizing the removal routes of seven pharmaceuticals in the activated sludge process | |
Peng, Jingjing3; Wang, Xingzu1; Yin, Fengjun1; Xu, Guihua1,2 | |
刊名 | SCIENCE OF THE TOTAL ENVIRONMENT |
2019-02-10 | |
卷号 | 650页码:2437-2445 |
关键词 | Pharmaceuticals Antibiotics Biodegradation Cod Degradation Nitrification |
ISSN号 | 0048-9697 |
DOI | 10.1016/j.scitotenv.2018.10.004 |
英文摘要 | The removal routes of pharmaceuticals especially biodegradation routes in the activated sludge process are still unclear. Some studies indicated pharmaceuticals were mainly removed via nitrification process (autotrophic biodegradation), while others suggested pharmaceuticals were mainly removed via COD degradation process (heterotrophic biodegradation). These unclear problems limited the improvements of pharmaceuticals removal. In this study, in order to elucidate three biodegradation routes (nitrification, COD degradation, or both nitrification and COD degradation), autotrophic and heterotrophic reactors were individually developed to separate nitrification and COD degradation form the activated sludge process (mix-trophic process including nitrification and COD degradation). Furthermore, the pharmaceuticals removal routes of adsorption, hydrolysis, and oxidation were also studied. Among six degradable pharmaceuticals, heterotrophic biodegradation and adsorption were the major removal routes. Two sulfonamides of five antibiotics were predominantly removed by COD degradation process, while nitrification and adsorption had no contributions. Adsorption, hydrolysis, nitrification, and COD degradation were the main elimination routes of cefalexin. COD degradation and adsorption were the dominant removal routes of norfloxacin. Tetracycline was mainly removed by the adsorption route, and hydrolysis and oxidation also played a role. For two drugs, ibuprofen was removed mainly via nitrification and COD degradation, and no adsorption occurred. Diclofenac could not be removed at all and was persistent in the aerobic conditions. Kinetic studies showed that biodegradation of the two sulfonamides, cefalexin, norfloxacin, and ibuprofen followed first-order kinetics rather than zero-order or second-order kinetics. (C) 2018 Elsevier B.V. All rights reserved. |
资助项目 | CAS Key Laboratory of Urban Pollutant Conversion, University of Science and Technology of China[KF201703] ; Natural Science Foundation of China[51878641] |
WOS研究方向 | Environmental Sciences & Ecology |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000447871400074 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.138/handle/2HOD01W0/6893] |
专题 | 中国科学院重庆绿色智能技术研究院 |
作者单位 | 1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China 2.Univ Sci & Technol China, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Anhui, Peoples R China 3.Max Planck Inst Terr Microbiol, D-35043 Marburg, Germany |
推荐引用方式 GB/T 7714 | Peng, Jingjing,Wang, Xingzu,Yin, Fengjun,et al. Characterizing the removal routes of seven pharmaceuticals in the activated sludge process[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,650:2437-2445. |
APA | Peng, Jingjing,Wang, Xingzu,Yin, Fengjun,&Xu, Guihua.(2019).Characterizing the removal routes of seven pharmaceuticals in the activated sludge process.SCIENCE OF THE TOTAL ENVIRONMENT,650,2437-2445. |
MLA | Peng, Jingjing,et al."Characterizing the removal routes of seven pharmaceuticals in the activated sludge process".SCIENCE OF THE TOTAL ENVIRONMENT 650(2019):2437-2445. |
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