Thermophilic anaerobic ethane oxidation coupled with selenate and selenite reduction.

Autor: Liu LY; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China., Dang CC; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China., Tan X; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China., Liu BF; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: lbf@hit.edu., Lu Y; Water Innovation and Smart Environment Laboratory, School of Civil and Environmental Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia., Zhao ZC; National Engineering Research Center for Ecological Environment of Yangtze River Economic Belt. Wuhan 430014, China; YANGTZE Eco-Environment Engineering Research Center, China Three Gorges Corporation, Wuhan 430014, China., Wang X; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China., Wang XW; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China., Xing DF; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China., Ren NQ; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China., Xie GJ; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: xgj@hit.edu.cn.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2024 Dec 03; Vol. 418, pp. 131934. Date of Electronic Publication: 2024 Dec 03.
DOI: 10.1016/j.biortech.2024.131934
Abstrakt: Anaerobic microorganisms are critical in regulating ethane in geothermal environments, where selenate and selenite are common contaminants. Although coupling ethane oxidation with selenate reduction has been demonstrated as feasible, such processes remain poorly explored in geothermal environments. This study addressed this gap by successfully enriching thermophilic anaerobic cultures capable of coupling ethane oxidation with selenate/selenite reduction, achieving selenate and selenite removal rate of 2.7 mg Se/L/d and 2.1 mg Se/L/d, respectively. Metagenomic analysis revealed a novel genus 'Candidatus Ethanivorans selenatireducens', which accounted for 16.0 % and 32.6 % of microbial communities in selenate- and selenite-dependent systems, respectively. This microorganism encoded pathways for anaerobic ethane oxidation via fumarate addition and genes required for the sequential reduction of selenate to elemental selenium. These findings unveiled a novel microbial mechanism linking ethane oxidation and selenate reduction in geothermal systems, providing new insights into the biogeochemical interaction between carbon and selenium in thermophilic environments.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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