Reductive transformation of hexabromocyclododecane (HBCD) by FeS

Li, Dan; Peng, Ping’an; Yu, Zhiqiang; Huang, Weilin; Zhong, Yin

doi:10.1016/j.watres.2016.05.066

Cited by 47 publications

(18 citation statements)

References 51 publications

(85 reference statements)

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“…It is important to note, however, that our recent study (Li et al, 2016b) demonstrated no reaction of chemically synthesized pure FeS phase with TBBPA under similar experiment conditions of this study. Thus, iron sulfides on the S-nZVI surface are less likely to have directly participated in the reaction between TBBPA and SnZVI.…”

Section: Overall Performances Of S-nzvi and Ns-nzvi In Tbbpa Transforsupporting

confidence: 69%

Reductive transformation of tetrabromobisphenol A by sulfidated nano zerovalent iron

et al. 2016

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Section: Overall Performances Of S-nzvi and Ns-nzvi In Tbbpa Transforsupporting

confidence: 69%

Reductive transformation of tetrabromobisphenol A by sulfidated nano zerovalent iron

et al. 2016

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“…As shown in Figure 3 , there were three metabolites produced during anaerobic degradation of HBCD, i.e., Peaks I, II, and III. As shown in Figure 4 , Peaks I and II were tentatively identified as tetrabromocyclododecene and dibromocyclododecadiene, respectively, by comparison with mass spectral of debromination products of HBCD reported in previous studies ( Li et al, 2016 , 2017 ). Peak III was identified by 1,5,9-cyclododecatriene by comparison with the respective retention time and mass spectrum of external standards.…”

Section: Resultsmentioning

confidence: 62%

Diastereoisomer-Specific Biotransformation of Hexabromocyclododecanes by a Mixed Culture Containing Dehalococcoides mccartyi Strain 195

Zhong

Wang

et al. 2018

Front. Microbiol.

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Hexabromocyclododecane (HBCD) stereoisomers may exhibit substantial differences in physicochemical, biological, and toxicological properties. However, there remains a lack of knowledge about stereoisomer-specific toxicity, metabolism, and environmental fate of HBCD. In this study, the biotransformation of (±)α-, (±)β-, and (±)γ-HBCD contained in technical HBCD by a mixed culture containing the organohalide-respiring bacterium Dehalococcoides mccartyi strain 195 was investigated. Results showed that the mixed culture was able to efficiently biotransform the technical HBCD mixture, with 75% of the initial HBCD (∼12 μM) in the growth medium being removed within 42 days. Based on the metabolites analysis, HBCD might be sequentially debrominated via dibromo elimination reaction to form tetrabromocyclododecene, dibromocyclododecadiene, and 1,5,9-cyclododecatriene. The biotransformation of the technical HBCD was likely diastereoisomer-specific. The transformation rates of α-, β-, and γ-HBCD were in the following order: α-HBCD > β-HBCD > γ-HBCD. The enantiomer fractions of (±)α-, (±)β-, and (±)γ-HBCD were maintained at about 0.5 during the 28 days of incubation, indicating a lack of enantioselective biotransformation of these diastereoisomers. Additionally, the amendment of another halogenated substrate tetrachloroethene (PCE), which supports the growth of strain 195, had a negligible impact on the transformation patterns of HBCD diastereoisomers and enantiomers. This study provided new insights into the stereoisomer-specific transformation patterns of HBCD by anaerobic microbes and has important implications for microbial remediation of anoxic environments contaminated by HBCD using the mixed culture containing Dehalococcoides.

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“…The minerals capable of abiotic contaminant transformation include iron sulfides (mackinawite (FeS), pyrite (FeS2), greigite (Fe3S4)) and additional iron (II) minerals such as magnetite (Lee and Batchelor, 2002), green rust (Ayala-Luis et al, 2012), and phyllosilicate clays (biotite (Kriegman-King and Reinhard, 1992) and vermiculite (Bae and Lee, 2012)). Among the most important of these iron (II) minerals is iron sulfide (FeS), a mineral with reductive properties that appears naturally in various anoxic environments (in concentrations often exceeding 10 μmol/g dry weight (Li et al, 2016)), being associated with sulfate-reducing bacteria that grow in anoxic aquifers and sediments. The natural formation of FeS involves two steps.…”

Section: Introductionmentioning

confidence: 99%

“…FeS nanoparticles have also been synthesized under laboratory conditions by various methods and they were used in the elimination of different organohalogen contaminants. Previous studies have reported the capacity of FeS to reductively dehalogenate various halogenated organic pollutants, such as hexachloroethane (Butler and Hayes, 1998), trichloroethylene (Butler et al, 2013;He et al, 2010), γ-hexachlorocyclohexane (γ-HCH) (Liu et al, 2003) and hexabromocyclododecane (HBCD) (Li et al, 2016). (Nie et al, 2020) recently showed that the degradation of trichloroethylene by biotic FeS was six time faster than its degradation by abiotic FeS.…”

Section: Introductionmentioning

confidence: 99%

Dehalogenation of α-hexachlorocyclohexane by iron sulfide nanoparticles: Study of reaction mechanism with stable carbon isotopes and pH variations

Badea¹,

Stegarus²,

Niculescu³

et al. 2021

Science of The Total Environment

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Reductive transformation of hexabromocyclododecane (HBCD) by FeS

Cited by 47 publications

References 51 publications

Reductive transformation of tetrabromobisphenol A by sulfidated nano zerovalent iron

Reductive transformation of tetrabromobisphenol A by sulfidated nano zerovalent iron

Diastereoisomer-Specific Biotransformation of Hexabromocyclododecanes by a Mixed Culture Containing Dehalococcoides mccartyi Strain 195

Dehalogenation of α-hexachlorocyclohexane by iron sulfide nanoparticles: Study of reaction mechanism with stable carbon isotopes and pH variations

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