Arsenic mobilization affected by extracellular polymeric substances (EPS) of the dissimilatory iron reducing bacteria isolated from high arsenic groundwater

Liu, Han; Li, Ping; Wang, Helin; Qing, Chun; Tian, Tan; Shi, Bo; Zhang, Guanglong; Jiang, Zhou; Wang, Yanhong; Hasan, Shah Zaib

doi:10.1016/j.scitotenv.2020.139501

Cited by 37 publications

(9 citation statements)

References 77 publications

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“…However, the specific proportion of EPS components is closely related to the types of microorganisms present, the microbial culture conditions, and the EPS extraction methods used. Liu et al [ 16 ] isolated three indigenous DIRB strains, including Shewanella putrefaciens IAR (iron and As reducing)-S1 , Shewanella xiamenensis IR (iron reducing)-S2 , and Klebsiella oxytoca IR-ZA from the natural groundwater samples of two tube wells of Hangjinhouqi County, China. In addition, bacteria EPS are made up of protein, polysaccharide, organic acid, and a small amount of DNA.…”

Section: Introductionmentioning

confidence: 99%

Extracellular Polymeric Substances Facilitate the Adsorption and Migration of Cu2+ and Cd2+ in Saturated Porous Media

Yang

et al. 2021

Biomolecules

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Heavy metal contamination in groundwater is a serious environmental problem. Many microorganisms that survive in subsurface porous media also produce extracellular polymeric substances (EPS), but little is known about the effect of these EPS on the fate and transport of heavy metals in aquifers. In this study, EPS extracted from soil with a steam method were used to study the adsorption behaviors of Cu2+ and Cd2+, employing quartz sand as a subsurface porous medium. The results showed that EPS had a good adsorption capacity for Cu2+ (13.5 mg/g) and Cd2+ (14.1 mg/g) that can be viewed using the Temkin and Freundlich models, respectively. At a pH value of 6.5 ± 0.1 and a temperature of 20 °C, EPS showed a greater affinity for Cu2+ than for Cd2+. The binding force between EPS and quartz sand was weak. The prior saturation of the sand media with EPS solution can significantly promote the migration of the Cu2+ and Cd2+ in sand columns by 8.8% and 32.1%, respectively. When treating both metals simultaneously, the migration of Cd2+ was found to be greater than that of Cu2+. This also demonstrated that EPS can promote the co-migration of Cu2+ and Cd2+ in saturated porous media.

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Section: Introductionmentioning

confidence: 99%

Extracellular Polymeric Substances Facilitate the Adsorption and Migration of Cu2+ and Cd2+ in Saturated Porous Media

Yang

et al. 2021

Biomolecules

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“…[137,139]. From the moment of such discovery to date, evidence from literature has consistently established the role of Shewanella oneidensis MR-1 as a typical DIRB that promotes the redox transformation of Fe(III)-oxides either directly or indirectly [49,123,[140][141][142][143]. Therefore, it is assumed that the fate and biogeochemical transformations of Fe and associated metals, e.g., As, are strongly linked [118,144].…”

Section: Effect Of Dissimilatory Iron-reducing Bacteria's Transformat...mentioning

confidence: 99%

Significance of Shewanella Species for the Phytoavailability and Toxicity of Arsenic—A Review

Darma

Yang

Zandi

et al. 2022

Biology

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The distribution of arsenic continues due to natural and anthropogenic activities, with varying degrees of impact on plants, animals, and the entire ecosystem. Interactions between iron (Fe) oxides, bacteria, and arsenic are significantly linked to changes in the mobility, toxicity, and availability of arsenic species in aquatic and terrestrial habitats. As a result of these changes, toxic As species become available, posing a range of threats to the entire ecosystem. This review elaborates on arsenic toxicity, the mechanisms of its bioavailability, and selected remediation strategies. The article further describes how the detoxification and methylation mechanisms used by Shewanella species could serve as a potential tool for decreasing phytoavailable As and lessening its contamination in the environment. If taken into account, this approach will provide a globally sustainable and cost-effective strategy for As remediation and more information to the literature on the unique role of this bacterial species in As remediation as opposed to conventional perception of its role as a mobiliser of As.

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“…The first mechanism prevails in late Pleistocene-Holocene aquifer systems, such as fluvial-lacustrine basins and deltas from As-contaminated countries, and involves various metabolic processes of iron, sulfur, and carbon [ 2 ]. For example, iron oxide reduction by dissimilatory iron-reducing bacteria can directly release absorbed As into groundwater [ 5 , 6 , 7 ]. Sulfate reduction by dissimilatory sulfate-reducing bacteria generates sulfide, which can abiotically reduce As-bearing iron oxides, to desorb As or further sequester As through co-precipitation and adsorption on derived sulfide minerals [ 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Arsenic Mobilization and Transformation by Ammonium-Generating Bacteria Isolated from High Arsenic Groundwater in Hetao Plain, China

Jiang

Shen

Shi

et al. 2022

IJERPH

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Arsenic (As) mobilization in groundwater involves biogeochemical cycles of carbon, iron, and sulfur. However, few studies have focused on the role of nitrogen-metabolizing bacteria in As mobilization, as well as in the transformation between inorganic and organic As in groundwater. In this study, the nitrogen and As metabolisms of Citrobacter sp. G-C1 and Paraclostridium sp. G-11, isolated from high As groundwater in Hetao Plain, China, were characterized by culture experiments and genome sequencing. The results showed Citrobacter sp. G-C1 was a dissimilatory nitrate-reducing bacterium. The dissimilatory nitrate reduction to ammonia (DNRA) and As-detoxifying pathways identified in the genome enabled Citrobacter sp. G-C1 to simultaneously reduce As(V) during DNRA. Paraclostridium sp. G-11 was a nitrogen-fixing bacterium and its nitrogen-fixing activity was constrained by As. Nitrogen fixation and the As-detoxifying pathways identified in its genome conferred the capability of As(V) reduction during nitrogen fixation. Under anaerobic conditions, Citrobacter sp. G-C1 was able to demethylate organic As and Paraclostridium sp. G-11 performed As(III) methylation with the arsM gene. Collectively, these results not only evidenced that ammonium-generating bacteria with the ars operon were able to transform As(V) to more mobile As(III) during nitrogen-metabolizing processes, but also involved the transformation between inorganic and organic As in groundwater.

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Arsenic mobilization affected by extracellular polymeric substances (EPS) of the dissimilatory iron reducing bacteria isolated from high arsenic groundwater

Cited by 37 publications

References 77 publications

Extracellular Polymeric Substances Facilitate the Adsorption and Migration of Cu2+ and Cd2+ in Saturated Porous Media

Extracellular Polymeric Substances Facilitate the Adsorption and Migration of Cu2+ and Cd2+ in Saturated Porous Media

Significance of Shewanella Species for the Phytoavailability and Toxicity of Arsenic—A Review

Arsenic Mobilization and Transformation by Ammonium-Generating Bacteria Isolated from High Arsenic Groundwater in Hetao Plain, China

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