https://scholars.lib.ntu.edu.tw/handle/123456789/446316
標題: | Microbial degradation of 4-monobrominated diphenyl ether in an aerobic sludge and the DGGE analysis of diversity | 作者: | Chen C.-Y. Wang C.-K. YANG-HSIN SHIH |
關鍵字: | Aerobic sludge; Co-metabolism; Debromination; Denaturing gradient gel electrophoresis; Polybrominated diphenyl ethers | 公開日期: | 2010 | 卷: | 45 | 期: | 5 | 起(迄)頁: | 379-385 | 來源出版物: | Journal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes | 摘要: | Polybrominated diphenyl ethers (PBDEs) were applied as flame retardant additives in polymers for many plastic and electronic products. Due to their ubiquitous distribution in the environment, potential toxicity to human and tendency for bioaccumulation, PBDEs have raised public safety concern. In this study we examined the degradation of 4-monobrominated diphenyl ether (4-BDE) in aerobic sludge, as a model for PBDE biodegradation. Degradation of 4-BDE was observed in aerobic sludge. Co-metabolism with toluene or diphenyl ether facilitated 4-BDE biodegradation in terms of kinetics and efficiency. Diphenyl ether seems to perform slightly better as an auxiliary carbon source than toluene in facilitating 4-BDE degradation. During the experiment we identified diphenyl ether by gas chromatography/mass spectrometry(GC/MS), which indicates that an anaerobic debromination has occurred. Bacterial community composition was monitored with denaturing gradient gel electrophoresis. The fragments enriched in 4-BDE-degrading aerobic sludge samples belong to presumably a novel anaerobic Clostridiales species distantly related to all known debrominating microbes. This suggests that 4-BDE biodegradation can occur in anaerobic micro-niche in an apparently aerobic environment, by a previously unknown bacterial species. These findings can provide better understandings of biodegradation of brominated diphenyl ethers and can facilitate the prediction of the fate of PBDEs in the environment. ? Taylor & Francis Group, LLC. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/446316 | ISSN: | 03601234 | DOI: | 10.1080/03601231003799945 | SDG/關鍵字: | Aerobic sludge; Bacterial community composition; Bacterial species; Brominated diphenyl ethers; Carbon source; Debromination; Denaturing gradient gel electrophoresis; Diphenyl ether; Electronic product; Flame-retardant additives; Gas chromatography/mass spectrometry; Microbial degradation; Polybrominated diphenyl ethers; Public safety; Bacteria; Bacteriology; Biochemistry; Biodegradation; Denaturation; Electronics industry; Electrophoresis; Ethers; Flame retardants; Gels; Metabolism; Organic compounds; Plastic products; Polyacrylates; Toluene; Degradation; diphenyl ether derivative; flame retardant; RNA 16S; anoxic conditions; bacterium; bioaccumulation; biodegradation; community composition; diversity index; gas chromatography; mass spectrometry; microbial activity; oxic conditions; PBDE; plastic; polymer; public health; sludge; toluene; toxicity; anaerobic growth; article; bioremediation; chemistry; genetics; metabolism; microbiology; polyacrylamide gel electrophoresis; polymerase chain reaction; sediment; sewage; time; water pollutant; Anaerobiosis; Biodegradation, Environmental; Electrophoresis, Polyacrylamide Gel; Flame Retardants; Geologic Sediments; Halogenated Diphenyl Ethers; Polymerase Chain Reaction; RNA, Ribosomal, 16S; Sewage; Time Factors; Water Pollutants, Chemical; Bacteria (microorganisms); Clostridiales |
顯示於: | 農業化學系 |
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