Aerobic degradation of nonhalogenated organophosphate flame esters (OPEs) by enriched cultures from sludge: Kinetics, pathways, bacterial community evolution, and toxicity evaluation
文献类型：期刊论文
| 作者 | Hou, Rui ; Wang, Yi; Zhou, Shaofeng; Zhou, Lihua; Yuan, Yong; Xu, Yiping
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2021-03-15 |
| 卷号 | 760页码:- |
| 关键词 | Organophosphate flame esters (OPEs) Aerobic degradation Degradation pathway Sewage sludge Toxicity assessment |
| ISSN号 | 0048-9697 |
| 英文摘要 | The degradation by bacteria has been considered the main process for eliminating nonhalogenated organophosphate esters (OPEs) from wastewater treatment plants (WWTPs), but limited research has reported the biodegradation processes and clarified the microbial-mediated mechanisms for nonhalogenated OPE degradation in WWTPs. The aim of this study was to monitor the biodegradation of the most common nonhalogenated OPEs, namely, tris(2-butoxyethyl) phosphate (TBOEP), tris (n-butyl) phosphate (TNBP) and trisphenyl phosphate (TPHP), under aerobic conditions by sludge cultures from a conventional sewage plant. The microbial cultures were enriched separately with each OPE fromactivated sludge cultures, and the presence of glucose significantly enhanced degradation of the OPEs during the enrichment. The removal ratios for the three OPEs reached 29.3-89.9% after 5 cycles (25 days) of cultivation, and the first-order degradation kinetics followed the order of TPHP > TBOEP > TNBP, with their half-lives ranging between 12.8 and 99.0 h. Pathways of hydrolysis, hydroxylation, methoxylation, and substitution were confirmed for the aerobic biodegradation of these nonhalogenated OPEs, but only di-alkyl phosphates (DAPs) largely accumulated in culture medium as the most predominant transformation products. Phylotypes in Klebsiella were significantly more abundant during OPE biodegradation than in the initial sludge, which indicated that these microorganisms are associated with the biodegradation of nonhalogenated OPEs in sludge culture. Biodegradation of all investigated nonhalogenated OPEs was associated with a significant reduction in the residual toxicity to Vibrio fischeri, indicating a rather positive ecotoxicological outcome of the aerobic biotransformation processes achieved by the enriched sludge culture. (C) 2020 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46172]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.Guangdong Univ Technol, Sch Biomed & Pharmaceut Sci, Guangzhou 510006, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangdong Prov Key Lab Appl Marine Biol, Gu 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 4.Guangdong Univ Technol, Guangdong Key Lab Environm Catalysis & Hlth Risk, Sch Environm Sci & Engn, Inst Environm Hlth & Pollut Control, Guangzhou 510006, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hou, Rui,Wang, Yi,Zhou, Shaofeng,et al. Aerobic degradation of nonhalogenated organophosphate flame esters (OPEs) by enriched cultures from sludge: Kinetics, pathways, bacterial community evolution, and toxicity evaluation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,760:-. |
| APA | Hou, Rui,Wang, Yi,Zhou, Shaofeng,Zhou, Lihua,Yuan, Yong,&Xu, Yiping.(2021).Aerobic degradation of nonhalogenated organophosphate flame esters (OPEs) by enriched cultures from sludge: Kinetics, pathways, bacterial community evolution, and toxicity evaluation.SCIENCE OF THE TOTAL ENVIRONMENT,760,-. |
| MLA | Hou, Rui,et al."Aerobic degradation of nonhalogenated organophosphate flame esters (OPEs) by enriched cultures from sludge: Kinetics, pathways, bacterial community evolution, and toxicity evaluation".SCIENCE OF THE TOTAL ENVIRONMENT 760(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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