Aerobic debromination of BDE-209 by Rhodococcus sp. coupled with zerovalent iron/activated carbon
| Autor: | Yilun Chen, Kuangfei Lin, Yacong Zhang, Ruihong Liu, Feng Xu, Zhiping Wang, Lili Liu |
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| Rok vydání: | 2015 |
| Předmět: |
China
Halogenation Iron Health Toxicology and Mutagenesis 0208 environmental biotechnology chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Solid Waste 01 natural sciences Gas Chromatography-Mass Spectrometry Halogenated Diphenyl Ethers medicine Rhodococcus Environmental Chemistry Organic chemistry Soil Microbiology 0105 earth and related environmental sciences Zerovalent iron Bromine biology General Medicine Contamination biology.organism_classification Pollution Aerobiosis 020801 environmental engineering chemistry Charcoal Environmental chemistry Degradation (geology) Energy source Carbon Activated carbon medicine.drug |
| Zdroj: | Environmental Science and Pollution Research. 23:3925-3933 |
| ISSN: | 1614-7499 0944-1344 |
| Popis: | In this study, an aerobic strain identified as Rhodococcus sp. was isolated from the sediment of a typical electronic waste disassemble site, Taizhou, China. This strain could use BDE-209 as the sole carbon and energy source and degrade 65.1% of BDE-209 (initial concentration being 50 mg/L) within 144 h. To explore the BDE-209 degradation properties of this strain with the co-existed electronic donor, zerovalent iron/activated carbon (ZVI/AC) was introduced to build a microbial-chemical coupling system, which was found to promote the degradation of BDE-209 slightly (74.7% in 144 h). Moreover, the debromination products in both of the batch experiments were determined with GC/MS, which showed that lower brominated PBDE congeners were produced almost in order of the number of bromine ions, ranged from nona- to di-BDEs. In addition, the possible debromination pathways of BDE-209 for each system were proposed respectively, which confirmed the microbial activity of BDE-209 debromination. Since some of the lower-brominated BDE congeners are much toxic than BDE-209, these microbial activities might bring potential hazards to the environment with BDE-209 contamination. It is the first time to investigate the transformation of BDE-209 with microbial-chemical coupling system, which is universal in the nature, thus suggesting that the ecological safety of environment exposed to PBDEs should be focused in the future. |
| Databáze: | OpenAIRE |
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