Synergistic effect of microscale zerovalent iron particles combined with anaerobic sludges on the degradation of decabromodiphenyl ether

被引:48
作者
Shih, Yang-hsin [1 ]
Chou, Hsi-Ling [2 ]
Peng, Yu-Huei [1 ]
Chang, Chih-yuan [1 ]
机构
[1] Natl Taiwan Univ, Dept Agr Chem, Taipei 106, Taiwan
[2] Natl Chung Hsing Univ, Dept Soil & Environm Sci, Taichung 402, Taiwan
关键词
Polybrominated diphenyl ethers; Microscale zerovalent iron; Anaerobic sludge; Debromination; Denaturing gradient gel electrophoresis (DGGE); POLYBROMINATED DIPHENYL ETHERS; ZERO-VALENT IRON; FLAME RETARDANTS; REDUCTIVE DEBROMINATION; PERCHLORATE REDUCTION; AUTOTROPHIC BACTERIA; SYSTEM; PHOTODEGRADATION; MICROORGANISMS; PERFORMANCE;
D O I
10.1016/j.biortech.2011.12.049
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Polybrominated diphenyl ethers (PBDEs) are widely used flame retardants. Owing to their toxicity and increasing accumulation in the environment, the fate of PBDEs in nature is of serious concern. The combined effects of microscale zerovalent iron (MZVI) and anaerobic sludge in decabromodiphenyl ether (BDE-209) degradation were investigated. The co-incubation resulted in 63% and 29% enhancement of removal ability when compared to the single component conditions. By-products generated during the entire process followed a stepwise sequence with non-uniform accumulation rates. Microbes hindered the accessibility of MZVI to BDE-209 and reduced the removal ability in the initial stage (<12 h). According to the analysis of the microbial community change, co-incubation with MZVI leads to the enrichment of heterotrophic microbial populations bearing nitrate- or iron-reducing activities. The interaction between MZVI and microbes contributed to the synergistic effect. Our findings provide evidence for this synergistic effect and offer an alternative for developing better remediation strategies. (c) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:14 / 20
页数:7
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