脱色希瓦氏菌S12对十溴联苯醚的利用及其降解特性研究

Utilization and degradation characteristics of decabromodiphenyl ether by Shewanella decolorationis S12

针对目前日益严重的多溴联苯醚污染问题,研究脱色希瓦氏菌S12在厌氧条件下对十溴联苯醚的利用及其降解特性。通过测定OD600值和电子显微镜观察分析S12菌的生长情况,并采用GC-MS分析十溴联苯醚(BDE-209)及其代谢产物的含量和组成。结果表明,在二甲基亚砜助溶条件下脱色希瓦氏菌S12能以BDE-209为厌氧呼吸的电子受体获得生长,且培养75d后,初始浓度为50mg·L^(-1)的BDE-209降解率达81.07%,其降解产物主要为九溴代和八溴代产物。本研究为多溴联苯醚的污染生物修复提供了参考数据和指导作用。

In view of the increasingly serious pollution problem of polybrominated diphenyl ethers(PBDEs),the utilization and degradation characteristics of decabromodiphenyl ether(BDE-209)by Shewanella decolorationis S12 under anaerobic conditions were studied.The growth of S12 was analyzed by measuring OD600 value and electron microscope,and the content and composition of decabromodiphenyl ether(BDE-209)and its metabolites were analyzed by GC-MS.The results indicated that S12 could grow with BDE-209 as the electron acceptor of anaerobic respiration.Meanwhile,after 75 days incubation,81.07%BDE-209 was transformed by S12 when the initial amount of BDE-209 was 50 mg·L^(-1).Its degradation products were mainly nine brominated and eight brominated products.The research findings provide some helpful scientific information for the anaerobic bioremediation of PBDEs.reduction.