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• W4221021937 endingPage "118277" @default.
• W4221021937 startingPage "118277" @default.
• W4221021937 abstract "Intrusion of salinity and petroleum hydrocarbons (e.g., benzene, toluene, ethylbenzene, and xylenes, BTEX) into shallow groundwater by so-called 'produced water' (the water associated with oil and gas production) has recently drawn much attention. However, how this co-contamination affects the groundwater microbial community remains unknown. Herein, geochemical methods (e.g., ion ratios) and high-throughput sequencing (amplicon and shotgun metagenomic) were used to study the contaminant source, hydrogeochemical conditions, microbial community and function in salinity and BTEX co-contaminated shallow groundwater in an oil field, northwest China. The desulfurization coefficient (100rSO42-/rCl-), coefficient of sodium and chloride (rNa+/rCl-), and coefficient of magnesium and chloride (rMg2+/rCl-) revealed an intrusion of produced water into groundwater, resulting in elevated levels of salinity and BTEX. The consumption of terminal electron acceptors (e.g., NO3-, Fe3+, and SO42-) was likely coupled with BTEX degradation. Relative to the bacteria, decreased archaeal diversity and enriched community in produced water-contaminated groundwater suggested that archaea were more susceptible to elevated BTEX and salinity. Relative to the nitrate and sulfate reduction genes, the abundance of marker genes encoding fermentation (acetate and hydrogen production) and methanogenesis (aceticlastic and methylotrophic) was more proportional to BTEX concentration. The produced water intrusion significantly enriched the salt-tolerant anaerobic fermentative heterotroph Woesearchaeia in shallow groundwater, and its co-occurrence with BTEX-degrading bacteria and methanogen Methanomicrobia suggested mutualistic interactions among the archaeal and bacterial communities to couple BTEX degradation with fermentation and methanogenesis. This study offers a first insight into the microbial community and function in groundwater contaminated by produced water." @default.
• W4221021937 created "2022-04-03" @default.
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• W4221021937 date "2022-05-01" @default.
• W4221021937 modified "2023-10-14" @default.
• W4221021937 title "Microbial compositional and functional traits of BTEX and salinity co-contaminated shallow groundwater by produced water" @default.
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• W4221021937 doi "https://doi.org/10.1016/j.watres.2022.118277" @default.
• W4221021937 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35305487" @default.
• W4221021937 hasPublicationYear "2022" @default.

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