Sulfate reduction accelerates groundwater arsenic contamination even in aquifers with abundant iron oxides

Nghiem, Athena A.; Prommer, Henning; Mozumder, Rajib Hassan; Siade, Adam; Jamieson, James; Ahmed, Kazi Matin; Geen, Alexander van; Bostick, Benjamín C.

doi:10.1038/s44221-022-00022-z

Cited by 23 publications

(3 citation statements)

References 97 publications

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“…Joint biological and chemical processes have been reported in the bioleaching of As-Fe-oxides by sulfate-reducing microorganisms in anoxic environments. The release of HSfrom the metabolism of sulfate reduction accelerates the release of As and Fe(II) by a purely chemical reaction on As-Ferrihydrite (as explained above), therefore contributing to the bioavailability of As (Nghiem et al 2023). Release of As from orpiment has also been reported under the action of S-oxidising Acidithiobacillus species (Shen et al 2022).…”

Section: Pure Chemical Interaction Between Sulfur and Arsenic Compoundsmentioning

confidence: 94%

The Complex Interplay of Sulfur and Arsenic Bioenergetic Metabolisms in the Arsenic Geochemical Cycle

D’Ermo,

Guiral,

Schoepp-Cothenet

2024

Geomicrobiology: Natural and Anthropogenic Settings

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Geochemical cycles of arsenic and sulfur are largely impacted by the activity of prokaryotes as microorganisms use these two elements for assimilatory and dissimilatory purposes.Knowledge of the enzymatic systems responsible for these processes is thus essential for understanding the geochemical cycles of both elements. But arsenic and sulfur commonly coexist in the environment, leading to the formation of thiolated arsenic species with one to four arsenic-bonded oxygen atoms substituted by sulfur. Considering these chemical species and the biological processes at the heart of their formation and transformations is therefore crucial for comprehending the complexity of the global geochemical cycles of arsenic and sulfur. This chapter offers a comprehensive overview of the well-known prokaryotic arsenic and sulfur enzyme systems responsible for use of these two elements in bioenergetics, as well as the ever growing-group of prokaryotic enzymes revealed to be able to convert thioarsenic species or to convert both arsenic and sulfur.

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Section: Pure Chemical Interaction Between Sulfur and Arsenic Compoundsmentioning

confidence: 94%

The Complex Interplay of Sulfur and Arsenic Bioenergetic Metabolisms in the Arsenic Geochemical Cycle

D’Ermo,

Guiral,

Schoepp-Cothenet

2024

Geomicrobiology: Natural and Anthropogenic Settings

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“…The first reasonable explanation is that HCO 3 produced by the respiration of Desulfovibrio competed with arsenate and caused the desorption of arsenic. On the other hand, HSproduced by the reduction of sulfate (via Desulfovibrio) created crucial conditions for the reduction of Fe(III), which could enhance the mobility of As by the reductive dissolution of iron oxides [29][30][31]. More importantly, the reduction products of sulfate could stimulate the reduction of As(V) to As(III) [32].…”

Section: Function Of Iron-sulfur-reducing Microbialmentioning

confidence: 99%

Enhanced Effect of Phytoextraction on Arsenic-Contaminated Soil by Microbial Reduction

Zhao,

Cao,

Chen

2023

Applied Sciences

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The gradually increasing presence of arsenic, a highly toxic heavy metal, poses a significant threat to both soil environmental safety and human health. Pteris vittata has long been recognized as an efficient hyperaccumulator plant for arsenic pollution. However, the pattern of arsenic accumulation in soil impacts its bioavailability and restricts the extraction efficiency of Pteris vittata. To address this issue, microorganisms have the potential to improve the arsenic accumulation efficiency of Pteris vittata. In this work, we employed anthropogenic enrichment methods to extract functional iron–sulfur-reducing bacteria from soil as a raw material. These bacteria were then utilized to assist Pteris vittata in the phytoremediation of arsenic-contaminated soil. Furthermore, the utilization of organic fertilizer produced from fermented crop straw significantly boosted the remediation effect. This led to an increase in the accumulation efficiency of arsenic by Pteris vittata by 87.56%, while simultaneously reducing the content of available arsenic in the soil by 98.36%. Finally, the experimental phenomena were studied through a soil-microbial batch leaching test and plant potting test. And the mechanism of the microorganism-catalyzed soil iron–sulfur geochemical cycle on arsenic release and transformation in soil as well as the extraction effect of Pteris vittata were systematically investigated using ICP, BCR sequential extraction and XPS analysis. The results demonstrated that using iron–sulfur-reducing microorganisms to enhance the phytoremediation effect is an effective strategy in the field of ecological restoration.

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“…Dissimilatory nitrate reduction to ammonia is enriched in the downgradient along the groundwater flow path [55]. Sulfate reduction accelerates groundwater arsenic contamination in aquifers with replete iron oxides [56]. The intrusion of produced water enhances the salinity and petroleum hydrocarbon levels in shallow groundwater, causing a transformation in the composition and functionality of bacterial and archaeal communities [34].…”

mentioning

confidence: 99%

Mobilization, Speciation, and Transformation of Organic and Inorganic Contaminants in Soil–Groundwater Ecosystems

Sheng,

Jiang,

Zhang

2023

Applied Sciences

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Sulfate reduction accelerates groundwater arsenic contamination even in aquifers with abundant iron oxides

Cited by 23 publications

References 97 publications

The Complex Interplay of Sulfur and Arsenic Bioenergetic Metabolisms in the Arsenic Geochemical Cycle

The Complex Interplay of Sulfur and Arsenic Bioenergetic Metabolisms in the Arsenic Geochemical Cycle

Enhanced Effect of Phytoextraction on Arsenic-Contaminated Soil by Microbial Reduction

Mobilization, Speciation, and Transformation of Organic and Inorganic Contaminants in Soil–Groundwater Ecosystems

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