Effects of carbonaceous materials on microbial bioavailability of 2,2 ',4,4 '-tetrabromodiphenyl ether (BDE-47) in sediments

文献类型: 外文期刊

第一作者: Zhu, Baotong

作者: Zhu, Baotong;Xia, Xinghui;Zhang, Xiaotian;Xia, Na;Liu, Ting;Wu, Shan;Lu, Xiaoxia

作者机构:

关键词: Polybrominated diphenyl ethers;Carbonaceous materials;Desorption;Bioavailability;Microorganisms

期刊名称:JOURNAL OF HAZARDOUS MATERIALS ( 影响因子:10.588; 五年影响因子:10.129 )

ISSN:

年卷期:

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收录情况: SCI

摘要: In this study, we investigated the influence of various types of carbonaceous materials (CMs) on the bioavailability of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) to polybrominated diphenyl ether (PBDE)degrading microorganisms in CM -amended sediments. The microbial debromination ratio of BDE-47 was reduced by 92.8%-98.2% in the 5.0% CM -amended sediment compared with in sediment without CM amendment after 100 d of anaerobic incubation. The concentrations of lower brominated products also decreased when the content of CMs increased from 0.2% to 5.0%. The inhibitory effects of CMs on BDE-47 debromination were CM content- and characteristic -specific. The reciprocals of BDE-47 debromination ratios and lower brominated product concentrations showed positive linear correlations with CM contents in sediments (p <0.01), and the slopes of linear regression fitting generally correlated with specific surface areas (SSAs) of CMs. Desorption of BDE-47 from CMs indicated the declined desorbing fraction of BDE-47 was responsible for the reduction in BDE-47 bioavailability to microorganisms, thus decreasing its debromination in sediments amended with CMs. This study revealed that CM amendment could reduce the PBDE bioavailability to PBDE-degrading microorganisms in sediments, and it is expected to help deepen our understanding of the environmental behaviors and risks of PBDEs. (C) 2016 Elsevier B.V. All rights reserved.

分类号: TB1

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