Biodegradation of 1,4-dioxane: Effects of enzyme inducers and trichloroethylene

Hand, Steven; Wang, Baixin; Chu, Kung-Hui

doi:10.1016/j.scitotenv.2015.03.031

Cited by 81 publications

(32 citation statements)

References 40 publications

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“…Although TCE and PCE are often commingled with 1,4-dioxane in contaminated soil and groundwater, only a limited number of studies have examined simultaneous degradation of multiple contaminants, with emphasis on binary mixtures of TCE and 1,4-dioxane or TCE and PCE (26,(41)(42)(43). The present study is the first report of simultaneous transformation of source zone levels of ternary mixtures of TCE, PCE, and 1,4-dioxane.…”

Section: Discussionmentioning

confidence: 83%

“…Although TCE and PCE are often commingled with 1,4-dioxane in contaminated groundwater, only a limited number of studies have examined simultaneous transformation of multiple contaminants, with emphasis on binary mixtures of TCE and 1,4-dioxane or TCE and PCE (26,(41)(42)(43). The main objectives of the present study were to do the following: (i) design a new fed batch, microbially driven Fenton reaction system that minimizes contaminant loss due to volatility by separating the Fe(II)-generating, H 2 O 2 -generating, and contaminant transformation phases and (ii) apply the new microbially driven Fenton reaction system to simultaneously transform single, binary, and ternary mixtures of TCE, PCE, and 1,4-dioxane.…”

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confidence: 99%

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Simultaneous Transformation of Commingled Trichloroethylene, Tetrachloroethylene, and 1,4-Dioxane by a Microbially Driven Fenton Reaction in Batch Liquid Cultures

Sekar

Taillefert

DiChristina

2016

Appl Environ Microbiol

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Improper disposal of 1,4-dioxane and the chlorinated organic solvents trichloroethylene (TCE) and tetrachloroethylene (also known as perchloroethylene [PCE]) has resulted in widespread contamination of soil and groundwater. In the present study, a previously designed microbially driven Fenton reaction system was reconfigured to generate hydroxyl (HO˙) radicals for simultaneous transformation of source zone levels of single, binary, and ternary mixtures of TCE, PCE, and 1,4-dioxane. The reconfigured Fenton reaction system was driven by fed batch cultures of the Fe(III)-reducing facultative anaerobe Shewanella oneidensis amended with lactate, Fe(III), and contaminants and exposed to alternating anaerobic and aerobic conditions. To avoid contaminant loss due to volatility, the Fe(II)-generating, hydrogen peroxide-generating, and contaminant transformation phases of the microbially driven Fenton reaction system were separated. The reconfigured Fenton reaction system transformed TCE, PCE, and 1,4-dioxane either as single contaminants or as binary and ternary mixtures. In the presence of equimolar concentrations of PCE and TCE, the ratio of the experimentally derived rates of PCE and TCE transformation was nearly identical to the ratio of the corresponding HO˙radical reaction rate constants. The reconfigured Fenton reaction system may be applied as an ex situ platform for simultaneous degradation of commingled TCE, PCE, and 1,4-dioxane and provides valuable information for future development of in situ remediation technologies. IMPORTANCE A microbially driven Fenton reaction system [driven by the Fe(III)-reducing facultative anaerobe S. oneidensis] was reconfigured to transform source zone levels of TCE, PCE, and 1,4-dioxane as single contaminants or as binary and ternary mixtures.The microbially driven Fenton reaction may thus be applied as an ex situ platform for simultaneous degradation of at least three (and potentially more) commingled contaminants. Additional targets for ex situ and in situ degradation by the microbially driven Fenton reaction developed in the present study include multiple combinations of environmental contaminants susceptible to attack by Fenton reaction-generated HO˙radicals, including commingled plumes of 1,4-dioxane, pentachlorophenol (PCP), PCE, TCE, 1,1,2-trichloroethane (TCA), and perfluoroalkylated substances (PFAS).T he chlorinated organic solvents trichloroethylene (TCE) and tetrachloroethylene (also known as perchloroethylene [PCE]) have been historically employed as solvents in a variety of industrial processes, including vapor degreasing of metal surfaces, paint stripping, and dry cleaning (1, 2). TCE and PCE are carcinogenic, and improper disposal practices at industrial sites have resulted in widespread contamination of soil and groundwater (1-6). Due to their high density and low aqueous phase solubility, TCE and PCE are also highly persistent in contaminated environments (3, 4). The potential carcinogen 1,4-dioxane is generally employed as a stabilizer for TCE and PCE i...

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Section: Discussionmentioning

confidence: 83%

mentioning

confidence: 99%

Simultaneous Transformation of Commingled Trichloroethylene, Tetrachloroethylene, and 1,4-Dioxane by a Microbially Driven Fenton Reaction in Batch Liquid Cultures

Sekar

Taillefert

DiChristina

2016

Appl Environ Microbiol

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“…Previous studies have reported that the co-presence of VOCs, such as trichloroethene (TCE) and 1,1-dichloroethene, diminished 1,4-dioxane degradation by several 1,4-dioxanedegrading bacteria by (1) competition between 1,4-dioxane and VOCs on monooxygenases that catalyze the initial oxidation of 1,4-dioxane and also the oxidation of VOCs, (2) repression of degradation gene expression, and (3) toxic effects of themselves or their degradation products [35,36]. It has also been reported that some metals have inhibitory effects on 1,4-dioxane degradation by P. dioxanivorans CB1190 [37].…”

Section: On-site Treatment Of 14-dioxane-contaminated Groundwater Usmentioning

confidence: 99%

Field Test of On-Site Treatment of 1,4-Dioxane-Contaminated Groundwater Using <i>Pseudonocardia</i> sp. D17

Yamamoto

Inoue

Sei

et al. 2018

J. of Wat. & Envir. Tech.

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Contamination of groundwater by 1,4-dioxane has been detected in many regions worldwide, especially in illegal industrial waste dumping sites. As 1,4-dioxane is a potential human carcinogen that is highly resistant to most conventional biological and physicochemical treatments, the development of a practical application method for treating 1,4-dioxane-contaminated groundwater is strongly desirable. Therefore, this study aimed to develop an on-site treatment system for 1,4-dioxane-contaminated groundwater using Pseudonocardia sp. D17, and assess the feasibility of the developed system for long-term treatment. This bacterial strain is capable of constitutively degrading 1,4-dioxane and using it as a source of carbon and energy. The on-site treatment of 1,4-dioxane-contaminated groundwater was performed in a 450-L continuous-flow bioreactor using strain D17 with a hydraulic retention time of 12 -18 h. To maintain a sufficiently high microbial concentration, strain D17 was monitored by qPCR, targeting the thmC gene associated with 1,4-dioxane degradation, and inoculated when needed. 1,4-Dioxane removal to meet the Japanese environmental quality standard for groundwater pollution (0.05 mg/L) was achieved for nearly 3 months by the additional inoculation of strain D17. These results suggest that on-site treatment using strain D17 could provide a practical solution for the treatment of 1,4-dioxane-contaminated groundwater.

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“…Therefore, aerobic microorganisms are a more attractive choice for bioaugmentation at sites requiring bioremediation. Rhodococcus jostii strain RHA1, which was isolated from a γ-hexachlorocyclohexane-contaminated site, can degrade a broad range of organic compounds, such as gasoline components, highly chlorinated PCB, and TCE under aerobic conditions (Hand et al, 2015;Iino et al, 2012;Seto et al, 1995). RHA1 has three linear plasmids, i.e., pRHL1…”

Section: Introductionmentioning

confidence: 99%

Ecological impact assessment of a bioaugmentation site on remediation of chlorinated ethylenes by multi-omics analysis

Watahiki

Kimura

Yamazoe

et al. 2019

J. Gen. Appl. Microbiol.

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Bioremediation may affect the ecological system around bioremediation sites. However, little is known about how microbial community structures change over time after the initial injection of degraders. In this study, we have assessed the ecological impact of bioaugmentation using metagenomic and metatranscriptomic approaches to remove trichlorinated ethylene/cis-dichloroethylene (TCE/cDCE) by Rhodococcus jostii strain RHA1 as an aerobic chemical compound degrader. Metagenomic analysis showed that the number of organisms belonging to the genus Rhodococcus, including strain RHA1, increased from 0.1% to 76.6% of the total microbial community on day 0 at the injection site. Subsequently, the populations of strain RHA1 and other TCE/cDCE-degrading bacteria gradually decreased over time, whereas the populations of the anaerobic dechlorinators Geobacter and Dehalococcoides increased at later stages. Metatranscriptomic analysis revealed a high expression of aromatic compound-degrading genes (bphA1-A4) in strain RHA1 after RHA1 injection. From these results, we concluded that the key dechlorinators of TCE/cDCE were mainly aerobic bacteria, such as RHA1, until day 1, after which the key dechlorinators changed to anaerobic bacteria, such as Geobacter and Dehalococcocides, after day 6 at the injection well. Based on the α-diversity, the richness levels of the microbial community were increased after injection of strain RHA1, and the microbial community composition had not been restored to that of the original composition during the 19 days after treatment. These results provide insights into the assessment of the ecological impact and bioaugmentation process of RHA1 at bioremediation sites.

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Biodegradation of 1,4-dioxane: Effects of enzyme inducers and trichloroethylene

Cited by 81 publications

References 40 publications

Simultaneous Transformation of Commingled Trichloroethylene, Tetrachloroethylene, and 1,4-Dioxane by a Microbially Driven Fenton Reaction in Batch Liquid Cultures

Simultaneous Transformation of Commingled Trichloroethylene, Tetrachloroethylene, and 1,4-Dioxane by a Microbially Driven Fenton Reaction in Batch Liquid Cultures

Field Test of On-Site Treatment of 1,4-Dioxane-Contaminated Groundwater Using <i>Pseudonocardia</i> sp. D17

Ecological impact assessment of a bioaugmentation site on remediation of chlorinated ethylenes by multi-omics analysis

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