Biochar-based composite microspheres embedded with zero-valent iron and soybean oil efficiently remove 1,1,1-trichloroethane and reshape microbial community in simulated groundwater

Environmental Geochemistry and Health, Journal Year: 2025, Volume and Issue: 47(5)

Published: April 10, 2025

Language: Английский

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Substrate-dependent strategies to mitigate sulfate inhibition on microbial reductive dechlorination of polychlorinated biphenyls

Chemosphere, Journal Year: 2023, Volume and Issue: 342, P. 140063 - 140063

Published: Sept. 4, 2023

Language: Английский

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Combatting multiple aromatic organohalide pollutants in sediments by bioaugmentation with a single Dehalococcoides

Water Research, Journal Year: 2024, Volume and Issue: 255, P. 121447 - 121447

Published: March 11, 2024

Language: Английский

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Sulfate-Driven Microbial Collaboration for Synergistic Remediation of Chloroethene-Heavy Metal Pollution

Water Research, Journal Year: 2024, Volume and Issue: 268, P. 122738 - 122738

Published: Nov. 2, 2024

Language: Английский

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The effect of bacteria addition on DDT biodegradation by BROWN-ROT fungus Gloeophyllum trabeum

Heliyon, Journal Year: 2023, Volume and Issue: 9(7), P. e18216 - e18216

Published: July 1, 2023

DDT (1,1,1-trichloro-2,2 bis(4-chlorophenyl) ethane) is a synthetic insecticide that has several negative effects on the environment and humans. Therefore, determining an effective method to reduce may give beneficial impact. Brown-rot fungus, Gloeophyllum trabeum, well known have ability degrade DDT, even though it might require long-term remediation. In this study, effect of addition bacteria biodegradation by G. trabeum had been investigated. Bacillus subtilis, Pseudomonas aeruginosa, Ralstonia pickettii were screened for which volume at 1, 3, 5, 10 mL time range days 0, 5. The B. P. R. into culture increased approximately 62.02; 74.66; 75.72%, respectively, in was only able 54.52% 7 incubation. enhanced degradation process, bacterium day 1 possessed highest value 92.41% within DDD detected be product metabolite through dechlorination reaction. This study indicated mixed cultures can used DDT.

Language: Английский

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Alleviating Chlorinated Alkane Inhibition on Dehalococcoides to Achieve Detoxification of Chlorinated Aliphatic Cocontaminants

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(40), P. 15112 - 15122

Published: Sept. 29, 2023

Cocontamination by multiple chlorinated solvents is a prevalent issue in groundwater, presenting formidable challenge for effective remediation. Despite the recognition of this issue, comprehensive assessment microbial detoxification processes involving chloroethenes and associated cocontaminants, along with underpinning microbiome, remains absent. Moreover, strategies to mitigate inhibitory effects cocontaminants have not been reported. Here, we revealed that chloroform exhibited most potent effects, followed 1,1,1-trichloroethane 1,1,2-trichloroethane, on dechlorination dichloroethenes (DCEs) Dehalococcoides-containing consortia. The observed inhibition could be attributed suppression biosynthesis enzymatic activity reductive dehalogenases growth Dehalococcoides. Notably, more profoundly inhibited Dehalococcoides populations harboring vcrA gene than those possessing tceA gene, thereby explaining accumulation vinyl chloride under cocontaminant stress. Nonetheless, successfully ameliorated augmentation Desulfitobacterium sp. strain PR owing its ability attenuate resulting concurrent DCEs, trichloroethanes, chloroform. Microbial community analyses demonstrated obvious alterations taxonomic composition, structure, assembly dechlorinating microbiome presence introduction reshaped similar original state absence cocontaminants. Altogether, these findings contribute developing bioremediation technologies clean up challenging sites polluted solvents.

Language: Английский

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Electron transfer process in dechlorination of polychlorinated biphenyls (PCBs) by nickel/zero-valent iron: Effects of temperature and selectivity pattern

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 470, P. 144053 - 144053

Published: June 10, 2023

Language: Английский

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Enhanced in situ bioremediation of chlorinated ethenes: from in situ microcosms to full-scale application

Bioremediation Journal, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 17

Published: June 4, 2024

Concentrations greater than 20 mg/L of chlorinated volatile organic compounds (cVOCs) including tetrachloroethene (PCE), trichloroethene (TCE), and cis-1,2-dichloroethene (cDCE) have been present in site groundwater for more four decades. To promote a faster clean-up time, an situ bioremediation approach was evaluated using In-Situ Microcosms® (ISMs) followed by full-scale approach. The ISM study slow-release versus quick-release carbon substrates with without bioaugmentation the ethene degrading culture, SDC-9™. After three-month incubation period, ISMs were retrieved. amended source or displayed 93% reduction TCE, which corresponded to increase cDCE all ISMs. Dehalococcoides population gene abundances associated biodegradation (tceA, bvcA, vcrA) increased three orders magnitude bioaugmented over natural attenuation only Additionally, SDC-9™ AquaBupH®, enhanced emulsified oil substrate (EOS®) buffer, unit showed highest level vinyl chloride similar EHC®, controlled-release, organo-iron substrate, ISM. However, AquaBupH acetate, demonstrating active fermentation processes. results indicated that combined biostimulation along effectively promoted conditions conducive reductive dechlorination. system coupled successfully reduce ethenes groundwater. EOS-100® served as sustained CoBupH (buffering agent AquaBupH), facilitating production hydrogen, through fatty acid fermentation. This led subsequent years, showcasing minimal rebound contaminant levels. Two rounds notably population, accelerating processes, is setting up monitored attenuation. shows guide design resulted effective cVOC quicker sustainable clean-up.

Language: Английский

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Burning question: Rethinking organohalide degradation strategy for bioremediation applications

Microbial Biotechnology, Journal Year: 2024, Volume and Issue: 17(8)

Published: July 29, 2024

Abstract Organohalides are widespread pollutants that pose significant environmental hazards due to their high degree of halogenation and elevated redox potentials, making them resistant natural attenuation. Traditional bioremediation approaches, primarily relying on bioaugmentation biostimulation, often fall short achieving complete detoxification. Furthermore, the emergence complex halogenated pollutants, such as per‐ polyfluoroalkyl substances (PFASs), further complicates remediation efforts. Therefore, there is a pressing need reconsider novel approaches for more efficient these recalcitrant pollutants. This review proposes redox‐potential‐mediated hybrid bioprocesses, tailored physicochemical properties contexts, achieve detoxification organohalides. The possible scenarios proposed discussed. In anaerobic environments, sediment groundwater, microbial reductive dehalogenation coupled with fermentation methanogenesis can convert organohalides into carbon dioxide methane. environments anaerobic‐aerobic alternation, paddy soil wetlands, synergistic process involving reduction oxidation facilitate mineralization highly organic compounds. Future research should focus in‐depth exploration consortia, application ecological principles‐guided strategies, development bioinspired‐designed techniques. paper contributes academic discourse by proposing innovative strategies complexities organohalide pollution.

Language: Английский

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Evaluating advancements and opportunities in electro-assisted biodehalogenation of emerging halogenated contaminants

Bioresource Technology, Journal Year: 2024, Volume and Issue: unknown, P. 132011 - 132011

Published: Dec. 1, 2024

Language: Английский

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