Natural attenuation of chlorinated ethenes in hyporheic zones: A review of key biogeochemical processes and in-situ transformation potential

Weatherill, John; Atashgahi, Siavash; Schneidewind, Uwe; Krause, Stefan; Ullah, Sami; Cassidy, Nigel J.; Rivett, Michael O.

doi:10.1016/j.watres.2017.10.059

Cited by 93 publications

(48 citation statements)

References 298 publications

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“…Sulfate and sulfide are known inhibitors of many OHRB [30, 62, 63]. However, debromination of 2,6-DBP was not affected in Desulfoluna strains in the presence of up to 20 mM sulfate (Fig.…”

Section: Resultsmentioning

confidence: 97%

Organohalide-respiringDesulfolunaspecies isolated from marine environments

Peng

Goris

et al. 2019

Preprint

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The genus Desulfoluna comprises two anaerobic sulfate-reducing strains, D. spongiiphila AA1⊤ and D. butyratoxydans MSL71⊤ of which only the former was shown to perform organohalide respiration (OHR). Here we isolated a third member of this genus from marine intertidal sediment, designed D. spongiiphila strain DBB. All three Desulfoluna strains harbour three reductive dehalogenase gene clusters (rdhABC) and corrinoid biosynthesis genes in their genomes. Brominated but not chlorinated aromatic compounds were dehalogenated by all three strains. The Desulfoluna strains maintained OHR in the presence of 20 mM sulfate or 20 mM sulfide, which often negatively affect OHR. Strain DBB sustained OHR with 2% oxygen in the gas phase, in line with its genetic potential for reactive oxygen species detoxification. Reverse transcription-quantitative PCR (RT-qPCR) revealed differential induction of rdhA genes in strain DBB in response to 1,4-dibromobenzene or 2,6-dibromophenol. Proteomic analysis confirmed differential expression of rdhA1 with 1,4-dibromobenzene, and revealed a possible electron transport chain from lactate dehydrogenases and pyruvate oxidoreductase to RdhA1 via menaquinones and either RdhC, or Fix complex (electron transfer flavoproteins), or Qrc complex (Type-1 cytochrome c3:menaquinone oxidoreductase).

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“…Sulfate and sulfide are known inhibitors of many OHRB [30, 62, 63]. However, debromination of 2,6-DBP was not affected in Desulfoluna strains in the presence of up to 20 mM sulfate (Fig.…”

Section: Resultsmentioning

confidence: 97%

Organohalide-respiringDesulfolunaspecies isolated from marine environments

Peng

Goris

et al. 2019

Preprint

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“…Sulfate and sulfide are known inhibitors for many OHRB [30,61,62]. However, debromination of 2,6-DBP was not affected in Desulfoluna strains in the presence of up to 20 mM sulfate (Fig.…”

Section: Sulfur Metabolism and Impact Of Sulfate And Sulfide On Debromentioning

confidence: 92%

Organohalide-respiring Desulfoluna species isolated from marine environments

Peng

Goris

et al. 2020

The ISME Journal

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The genus Desulfoluna comprises two anaerobic sulfate-reducing strains, D. spongiiphila AA1 T and D. butyratoxydans MSL71 T , of which only the former was shown to perform organohalide respiration (OHR). Here we isolated a third strain, designated D. spongiiphila strain DBB, from marine intertidal sediment using 1,4-dibromobenzene and sulfate as the electron acceptors and lactate as the electron donor. Each strain harbors three reductive dehalogenase gene clusters (rdhABC) and corrinoid biosynthesis genes in their genomes, and dehalogenated brominated but not chlorinated organohalogens. The Desulfoluna strains maintained OHR in the presence of 20 mM sulfate or 20 mM sulfide, which often negatively affect other organohalide-respiring bacteria. Strain DBB sustained OHR with 2% oxygen in the gas phase, in line with its genetic potential for reactive oxygen species detoxification. Reverse transcription-quantitative PCR revealed differential induction of rdhA genes in strain DBB in response to 1,4-dibromobenzene or 2,6-dibromophenol. Proteomic analysis confirmed expression of rdhA1 with 1,4-dibromobenzene, and revealed a partially shared electron transport chain from lactate to 1,4-dibromobenzene and sulfate, which may explain accelerated OHR during concurrent sulfate reduction. Versatility in using electron donors, de novo corrinoid biosynthesis, resistance to sulfate, sulfide and oxygen, and concurrent sulfate reduction and OHR may confer an advantage to marine Desulfoluna strains.

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“…; Weatherill et al. ). Quantification of CAH fluxes in groundwater from former industrialized and contaminated sites can be carried out using the contaminant mass discharge (CMD) approach, where the mass per unit time flowing through a virtual control plane is quantified (Basu et al.…”

Section: Introductionmentioning

confidence: 99%

Evidence of Spatio‐Temporal Variations in Contaminants Discharging to a Peri‐Urban Stream

Lemaire

McKnight

Schulz

et al. 2020

Groundwater Monitoring Rem

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Xenobiotic organic compounds can be discharged from contaminated groundwater inflow and may seep into streams from multiple pathways with very different dynamics, some not fully understood. In this study, we investigated the spatio‐temporal variation of chlorinated ethenes discharging from a former industrial site (with two main contaminant sources, A and B) into a stream system in a heterogeneous clay till setting in eastern Denmark. The investigated reach and near‐stream surroundings are representative of peri‐urban settings, with a mix of high channel alteration and more natural stream environment. We therefore propose an approach for risk assessing impacts arising from such complex contamination patterns, accounting for potential spatio‐temporal fluctuations and presence of multiple pathways. Our study revealed substantial variations in pathway contributions and overall contaminant mass discharge to the stream. Variable contaminant contributions arising from both groundwater seepage and urban drains were identified in the channelized part of the north stream, primarily from source A. Furthermore, variations in the hyporheic and shallow groundwater flows were found to enhance contaminant transport from source B. These processes result in an increase of the overall mass of contaminant discharged, correlating with the channels' flow. Thus, an in‐stream control plane approach was found to be an effective method for integrating multiple and variable discharge contributions quantitatively, although information on specific contaminant sources is lost. This study highlights the complexity and variability of contaminant fluxes occurring at the interface between groundwater and peri‐urban streams, and calls for the consideration of these variations when designing monitoring programs and remedial actions for contaminated sites with the potential to impact streams.

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Natural attenuation of chlorinated ethenes in hyporheic zones: A review of key biogeochemical processes and in-situ transformation potential

Cited by 93 publications

References 298 publications

Organohalide-respiringDesulfolunaspecies isolated from marine environments

Organohalide-respiringDesulfolunaspecies isolated from marine environments

Organohalide-respiring Desulfoluna species isolated from marine environments

Evidence of Spatio‐Temporal Variations in Contaminants Discharging to a Peri‐Urban Stream

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