Microbial communities involved in arsenic mobilization and release from the deep sediments into groundwater in Jianghan plain, Central China

Chen, Xiaoming; Zeng, Xian‐Chun; Wang, Jianbo; Deng, Yamin; Ma, Teng; Guoji, E; Mu, Yao; Yang, Ye; Li, Hao; Wang, Yanxin

doi:10.1016/j.scitotenv.2016.11.024

Cited by 68 publications

(13 citation statements)

References 59 publications

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“…The k 1 values obtained for this study were within the same order of magnitude as those measured in previous microbial reduction studies for Fe and Mn. 60,25,23 For instance, the kinetics of microbial Fe(III) reduction during the anaerobic incubation of wetland sediments followed first order rates (0.075−0.138 d −1 ) in the presence of organic matter. 61 Recently, similar microbial reduction rates of As(V) were obtained using a kinetic model for systems with microorganisms and Fe oxides.…”

Section: Redox Cycling Experimentsmentioning

confidence: 99%

Mobilization of As, Fe, and Mn from Contaminated Sediment in Aerobic and Anaerobic Conditions: Chemical or Microbiological Triggers?

DeVore

Rodríguez-Freire

Villa

et al. 2022

ACS Earth Space Chem.

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We integrated aqueous chemistry, spectroscopy, and microbiology techniques to identify chemical and microbial processes affecting the release of arsenic (As), iron (Fe), and manganese (Mn) from contaminated sediments exposed to aerobic and anaerobic conditions. The sediments were collected from Cheyenne River Sioux Tribal lands in South Dakota, which has dealt with mining legacy for several decades. The range of concentrations of total As measured from contaminated sediments was 96 to 259 mg kg–1, which co-occurs with Fe (21 000–22 005 mg kg–1) and Mn (682–703 mg kg–1). The transition from aerobic to anaerobic redox conditions yielded the highest microbial diversity, and the release of the highest concentrations of As, Fe, and Mn in batch experiments reacted with an exogenous electron donor (glucose). The reduction of As was confirmed by XANES analyses when transitioning from aerobic to anaerobic conditions. In contrast, the releases of As, Fe and Mn after a reaction with phosphate was at least 1 order of magnitude lower compared with experiments amended with glucose. Our results indicate that mine waste sediments amended with an exogenous electron donor trigger microbial reductive dissolution caused by anaerobic respiration. These dissolution processes can affect metal mobilization in systems transitioning from aerobic to anaerobic conditions in redox gradients. Our results are relevant for natural systems, for surface and groundwater exchange, or other systems in which metal cycling is influenced by chemical and biological processes.

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Section: Redox Cycling Experimentsmentioning

confidence: 99%

Mobilization of As, Fe, and Mn from Contaminated Sediment in Aerobic and Anaerobic Conditions: Chemical or Microbiological Triggers?

DeVore

Rodríguez-Freire

Villa

et al. 2022

ACS Earth Space Chem.

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“…Increasing evidences suggest that the microbial communities play major roles in the transformation, mobilization or immobilization of arsenic in the arsenic-rich sediments ( Das et al, 2016 ; Chen et al, 2017 ). Diverse AOB and DARPs catalyze the redox reactions of arsenic in the sediments ( Oremland and Stolz, 2003 ; Rhine et al, 2005 ; Islam et al, 2013 ; Kulp, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

“…As(V) can also be directly reduced into As(III) by DARPs using lactate, pyruvate, acetate, or other organic/inorganic materials as the sole electron donor ( Sierra-Alvarez et al, 2005 ; Lear et al, 2007 ; Song et al, 2009 ; Kudo et al, 2013 ; Ohtsuka et al, 2013 ; Osborne et al, 2015 ). DARPs were found to be the major driver of the dissolution and release of arsenic from sediments into groundwater ( Kudo et al, 2013 ; Ohtsuka et al, 2013 ; Osborne et al, 2015 ; Chen et al, 2017 ; Wang et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

“…Geochemical surveys indicated that groundwater in some areas in Jianghan Plain was contaminated by arsenic ( Gan et al, 2014 ). Previously, we found that DARPs widely exist in the deep sediments of this plain, and significantly catalyze the dissolution, reduction, and release of arsenic from sediments into groundwater ( Chen et al, 2017 ). Our group also found that sulfate markedly enhances the DARPs-mediated dissolution, reduction and release of arsenic and iron from mineral phase into groundwater ( Wang et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

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Microbially Mediated Methylation of Arsenic in the Arsenic-Rich Soils and Sediments of Jianghan Plain

et al. 2018

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Almost nothing is known about the activities and diversities of microbial communities involved in As methylation in arsenic-rich shallow and deep sediments; the correlations between As biomethylation and environmental parameters also remain to be elucidated. To address these issues, we collected 9 arsenic-rich soil/sediment samples from the depths of 1, 30, 65, 95, 114, 135, 175, 200, and 223 m in Jianghan Plain, China. We used microcosm assays to determine the As-methylating activities of the microbial communities in the samples. To exclude false negative results, we amended the microcosms with 0.2 mM As(III) and 20.0 mM lactate. The results indicated that the microbial communities in all of the samples significantly catalyzed arsenic methylation. The arsM genes were detectable from all the samples with the exception of 175 m, and 90 different arsM genes were identified. All of these genes code for new or new-type ArsM proteins, suggesting that new As-methylating microorganisms are widely distributed in the samples from shallow to deep sediments. To determine whether microbial biomethylation of As occurs in the sediments under natural geochemical conditions, we conducted microcosm assays without exogenous As and carbons. After 80.0 days of incubation, approximately 4.5–15.5 μg/L DMAsV were detected in all of the microcosms with the exception of that from 30 m, and 2.0–9.0 μg/L MMAsV were detected in the microcosms of 65, 114, 135, 175, 200, and 223 m; moreover, approximately 18.7–151.5 μg/L soluble As(V) were detected from the nine sediment samples. This suggests that approximately 5.3, 0, 8.1, 28.9, 18.0, 8.7, 13.8, 10.2, and 14.9% of total dissolved As were methylated by the microbial communities in the sediment samples from 1, 30, 65, 95, 114, 135, 175, 200, and 223 m, respectively. The concentrations of biogenic DMAsV show significant positive correlations with the depths of sediments, and negative correlations with the environmental NH4+ and NaCl concentrations, but show no significant correlations with other environmental parameters, such as NO3-, SO42+, TOC, TON, Fe, Sb, Cu, K, Ca, Mg, Mn, and Al. This work helps to better understand the biogeochemical cycles of arsenic in arsenic-rich shallow and deep sediments.

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“…In natural sediments, various reductants (Fe(II), S(II), organic materials, etc.) can coexist that can reduce redox-sensitive metals and contaminants such as Cr(VI), Tc(VII), U(VI), and As(V), etc. ,− Multi-rate models have been used to describe reaction properties in a sediment containing various reactive components ,,, or single component with species of different reactivity, such as Fe(II). ,, These models are mathematically analogous to the GC approach for scaling sorption processes. Because of the difficulty in identifying all of the redox species and their redox reactivity in natural sediments, the rate constants fitted from one sediment are usually not applicable to other sediments, even at the same field site.…”

Section: Introductionmentioning

confidence: 99%

A Generalized-Rate Model for Describing and Scaling Redox Kinetics in Sediments Containing Variable Redox-Reactive Materials

Liu

2018

Environ. Sci. Technol.

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This study developed a generalized modeling approach for describing and scaling redox reactions from reactive components to the sediments and their assemblages, using Cr(VI) reduction as an example. Batch experiments were performed to characterize the rates of Cr(VI) reduction in four Fe(II)-containing sediments and their assemblages. The experimental data were first used to calibrate a generalized-rate model of Cr(VI) reduction with generic rate parameters. The generalized-rate model was then used to describe the kinetics of Cr(VI) reduction in the sediment assemblages by linearly scaling the rate parameters from the individual sediments. Via comparison with the experimental results, this study found that the generalized-rate model with generic rate parameters can describe Cr(VI) reduction in individual sediments and their assemblages with different redox reactivity toward Cr(VI) reduction. The sediment-associated Fe(II) and its reactivity were found to be the key variables in the generalized model for describing the Cr(VI) reduction in the studied sediments. A three-step extraction method was subsequently developed to estimate the rate-specific Fe(II) pools that can facilitate the application of the scaling approach in field systems.

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Microbial communities involved in arsenic mobilization and release from the deep sediments into groundwater in Jianghan plain, Central China

Cited by 68 publications

References 59 publications

Mobilization of As, Fe, and Mn from Contaminated Sediment in Aerobic and Anaerobic Conditions: Chemical or Microbiological Triggers?

Mobilization of As, Fe, and Mn from Contaminated Sediment in Aerobic and Anaerobic Conditions: Chemical or Microbiological Triggers?

Microbially Mediated Methylation of Arsenic in the Arsenic-Rich Soils and Sediments of Jianghan Plain

A Generalized-Rate Model for Describing and Scaling Redox Kinetics in Sediments Containing Variable Redox-Reactive Materials

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