Profiling microbial community structures and functions in bioremediation strategies for treating 1,4-dioxane-contaminated groundwater

Yu, Miao; Heintz, M. B.; Bell, Caitlin H.; Johnson, Nicholas W.; Polasko, Alexandra; Favero, David Del; Mahendra, Shaily

doi:10.1016/j.jhazmat.2020.124457

Cited by 32 publications

(12 citation statements)

References 73 publications

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“…However, studies on engineered co‐metabolic biodegradation targeted a DO concentration of at least 4 mg/L (Lippincott et al 2015), modeled a lower limit of 1.5 mg/L (Barajas‐Rodriguez and Freedman 2018), and found reduced degradation rates when DO was below 0.9 to 1.7 mg/L (Aoyagi et al 2018). Additionally, providing macronutrients such as nitrogen and phosphorous to facilitate microbial processes in the presence of the added carbon substrate (e.g., propane) should be considered for engineered systems (Horst et al 2019; Miao et al 2021). Another consideration is the presence of chlorinated solvents, as some of them have been shown to inhibit 1,4‐dioxane biodegradation.…”

Section: Introductionmentioning

confidence: 99%

First Full‐Scale In Situ Propane Biosparging for Co‐Metabolic Bioremediation of 1,4‐Dioxane

Bell¹,

Wong²,

Parsons³

et al. 2022

Groundwater Monitoring Rem

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1,4‐Dioxane is an emerging contaminant of environmental concern, probable human carcinogen, and it can result in diffuse groundwater plumes and is not readily treated using common remedial techniques (e.g., via air stripping or granular activated carbon). In situ bioremediation of 1,4‐dioxane has been studied at the bench‐scale and pilot‐scale. This work documents the full‐scale application of in situ propane biosparging for the treatment of 1,4‐dioxane. The subject site is located at Vandenberg Space Force Base in California. Installation of the full‐scale treatment system came after several pilot tests (e.g., Lippincott et al. 2015), stable isotope testing (Bell et al. 2016), and rebound testing conducted from 2012 to 2016. The full‐scale propane biosparge system supplies air and propane at an average of 5 kg (11 pounds) of propane per day to a network of 97 biosparge wells, or 52 g (0.11 pounds) of propane per day per biosparge well. Additionally, a bioaugmentation culture and macronutrients were delivered to the subsurface. After approximately 6 months of operation, 1,4‐dioxane was reduced at up to 99.2%, with an average global reduction of 64.1% (excluding two anomalous monitoring wells) across a treatment area of approximately 30.5 by 61 m (100 by 200 ft).

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Section: Introductionmentioning

confidence: 99%

First Full‐Scale In Situ Propane Biosparging for Co‐Metabolic Bioremediation of 1,4‐Dioxane

Bell¹,

Wong²,

Parsons³

et al. 2022

Groundwater Monitoring Rem

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“…In phase 0, the genes of the dominant family Rhodocyclaceae mostly clustered to the genus Methyloversatilis (48.7% relative abundance; Figure B), a typical methylotroph that can utilize various single-carbon compounds. , Methyloversatilis was abundant in ethane-incubated cultures and probably capable of utilizing short-chain alkanes, including ethane. , The relatively high abundance of these phylotypes suggests that Methyloversatilis was the potential ethanotroph in the inoculum. In the biofilms from the synergistic phases, the relative abundance of Methyloversatilis phylotypes significantly decreased due to lower ethane loadings: to 1.5% in phase III (∼1/8 of the ethane loading in phase 0) and 0.3% in phase IV (∼1/40 of the ethane loading in phase 0).…”

Section: Resultsmentioning

confidence: 99%

A Synergistic Platform for Continuous Co-removal of 1,1,1-Trichloroethane, Trichloroethene, and 1,4-Dioxane via Catalytic Dechlorination Followed by Biodegradation

Luo

Long

Wang

et al. 2021

Environ. Sci. Technol.

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Groundwater co-contaminated with 1,4-dioxane, 1,1,1-trichloroethane (TCA), and trichloroethene (TCE) is among the most urgent environmental concerns of the U.S. Department of Defense (DoD), U.S. Environmental Protection Agency (EPA), and industries related to chlorinated solvents. Inspired by the pressing need to remove all three contaminants at many sites, we tested a synergistic platform: catalytic reduction of 1,1,1-TCA and TCE to ethane in a H2-based membrane palladium-film reactor (H2-MPfR), followed by aerobic biodegradation of ethane and 1,4-dioxane in an O2-based membrane biofilm reactor (O2-MBfR). During 130 days of continuous operation, 1,1,1-TCA and TCE were 95–98% reductively dechlorinated to ethane in the H2-MPfR, and ethane served as the endogenous primary electron donor for promoting 98.5% aerobic biodegradation of 1,4-dioxane in the O2-MBfR. In addition, the small concentrations of the chlorinated intermediate from the H2-MPfR, dichloroethane (DCA) and monochloroethane (MCA), were fully biodegraded through aerobic biodegradation in the O2-MBfR. The biofilms in the O2-MBfR were enriched in phylotypes closely related to the genera Pseudonocardia known to biodegrade 1,4-dioxane.

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“…Specific functions can be broadly distributed in distant microbial taxa to counteract environmental stress ( 31 ). Miao et al ( 32 ) conducted bench experiments to assess the taxonomic and genetic functions in response to 1,4-dioxane-contaminated groundwater under different biostimulation and bioaugmentation treatments. The taxonomic composition of the microbial community changed dynamically under different treatment conditions, while the functional pathways either remained stable or eventually returned to the original state.…”

Section: Discussionmentioning

confidence: 99%

Metagenomic Sequencing Reveals that the Assembly of Functional Genes and Taxa Varied Highly and Lacked Redundancy in the Earthworm Gut Compared with Soil under Vanadium Stress

et al. 2022

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Metagenomic sequencing revealed the variation of functional genes in the microbial community in soil and earthworm gut with increasing vanadium concentrations, which provided a new insight to explore the effect of vanadium stress on microbial community assembly from the perspective of functional genes. Our results reinforced the view that functional genes and taxa do not appear to have a simple corresponding relationship.

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Profiling microbial community structures and functions in bioremediation strategies for treating 1,4-dioxane-contaminated groundwater

Cited by 32 publications

References 73 publications

First Full‐Scale In Situ Propane Biosparging for Co‐Metabolic Bioremediation of 1,4‐Dioxane

First Full‐Scale In Situ Propane Biosparging for Co‐Metabolic Bioremediation of 1,4‐Dioxane

A Synergistic Platform for Continuous Co-removal of 1,1,1-Trichloroethane, Trichloroethene, and 1,4-Dioxane via Catalytic Dechlorination Followed by Biodegradation

Metagenomic Sequencing Reveals that the Assembly of Functional Genes and Taxa Varied Highly and Lacked Redundancy in the Earthworm Gut Compared with Soil under Vanadium Stress

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