title: Synergistic effect of microscale zerovalent iron particles combined with anaerobic sludges on the degradation of decabromodiphenyl ether.
abstract: 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.
authors.affiliation: Department of Agricultural Chemistry, National Taiwan University, Taipei 106, Taiwan ROC. yhs@ntu.edu.tw
authors.forename: Yang-hsin
authors.initials: YH
authors.lastname: Shih
authors.forename: Hsi-Ling
authors.initials: HL
authors.lastname: Chou
authors.forename: Yu-Huei
authors.initials: YH
authors.lastname: Peng
authors.forename: Chih-yuan
authors.initials: CY
authors.lastname: Chang
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism*; D001673:Biodegradation, Environmental; D004785:Environmental Pollutants / Q000378:metabolism*; D005411:Flame Retardants / Q000378:metabolism*; D055768:Halogenated Diphenyl Ethers / Q000378:metabolism*; D007501:Iron / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology*; D013045:Species Specificity
chemical_list: D004785:Environmental Pollutants; D005411:Flame Retardants; D055768:Halogenated Diphenyl Ethers; D012722:Sewage; D007501:Iron; C010902:decabromobiphenyl ether