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- W3191444664 endingPage "117542" @default.
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- W3191444664 abstract "The wish for rapid degradation of chlorinated organic pollutants along with the increase concern with respect to greenhouse effect and bioenergy methane production have created urgent needs to explore synchronous regulation approach. Microbial electrolysis cell was established under four degressive cathode potential settings (from -0.15V to -0.60V) to regulate γ-hexachlorocyclohexane (γ-HCH) reduction while CH4 cumulation in this study. The synchronous facilitation of γ-HCH reduction and CH4 cumulation was occurred in -0.15V treatment while the facilitation of γ-HCH reductive removal together with the inhibition of CH4 cumulation was showed in -0.30V treatment. Electrochemical patterns via cyclic voltammetry and morphological performances via scanning electron microscopy illustrated bioelectrostimulation promoted redox reactions and helped to construct mature biofilms located on bioelectrodes. Also, bioelectrostimulated regulation pronouncedly affected the bacteria and archaeal communities and subsequently assembled distinctly core sensitive responders across bioanode, biocathode and plankton. Clostridum, Longilinea and Methanothrix relatively accumulated in the plankton, and Cupriavidus and Methanospirillum, and Perimonas and Nonoarcheaum in biocathode and bioanode, respectively; while Pseudomonas, Stenotrophomonas, Methanoculleus and Methanosarcina were diffusely enriched. Microbial interactions in the ecological network were more complicated in -0.15V and -0.30V cathodic potential treatments, coincident with the increasement of γ-HCH reduction. The co-existence between putative dechlorinators and methanogens was less significant in -0.30V treatment when compared to that in -0.15V treatment, relevant with the variations of CH4 cumulation. In all, this study firstly corroborated the availability to synchronously regulate γ-HCH reductive removal and methanogenesis. Besides, it paves an advanced approach controlling γ-HCH reduction in cooperation with CH4 cumulation, of which to achieve γ-HCH degradation facilitation along with biogas (CH4) production promotion with -0.15V cathode potential during anaerobic γ-HCH contaminated wastewater digestion, or to realize γ-HCH degradation facilitation with the inhibition of CH4 emission with -0.30V cathode potential for an all-win remediation in γ-HCH polluted anaerobic environment such as paddy soil." @default.
- W3191444664 created "2021-08-16" @default.
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- W3191444664 date "2021-09-01" @default.
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- W3191444664 title "Regulating the dechlorination and methanogenesis synchronously to achieve a win-win remediation solution for <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si1.svg><mml:mi>γ</mml:mi></mml:math>-hexachlorocyclohexane polluted anaerobic environment" @default.
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- W3191444664 doi "https://doi.org/10.1016/j.watres.2021.117542" @default.
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