Arsenic release from arsenopyrite weathering in acid mine drainage: Kinetics, transformation, and effect of biochar

Cen, Ling; Cheng, Hongguang; Liu, Qingyou; Wang, Shuai; Wang, Xi

doi:10.1016/j.envint.2022.107558

Cited by 9 publications

(5 citation statements)

References 60 publications

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“…Arsenic released from the pyrite mineral structure can be retained by co-precipitation (e.g., ferric arsenates) and adsorption to Fe (oxyhydr)oxides that slows As release into solution (Tabelin et al 2020). Additionally, Cen et al (2022) found that the release of As 3+ from the oxidative dissolution of arsenopyrite decreases with the presence of biochar, a similar inorganic/organic carbon form to coal. Such factors indicate the likelihood of the limiting of As release until full oxidation of the element and degradation or transport of sorbing surfaces.…”

Section: Ini Al Arsenic Model Vs Leach Columnmentioning

confidence: 98%

“…The delay in leachate As release likely is a result of the multi-step release of As from pyrite where As is initially released from the degrading mineral as a non-soluble species (As 3+ or AsO3 −3 ) that will be sorbed before full oxidation to the more soluble As 5+ or AsO4 −3 (Silva et al 2017;Cen et al 2022). Arsenic released from the pyrite mineral structure can be retained by co-precipitation (e.g., ferric arsenates) and adsorption to Fe (oxyhydr)oxides that slows As release into solution (Tabelin et al 2020).…”

Section: Ini Al Arsenic Model Vs Leach Columnmentioning

confidence: 99%

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Kinetic Model Evaluation of Arsenic and Selenium Sources and Mobility in Waste Rock of the Powder River Basin, USA

Langman

2024

Preprint

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Groundwater quality can be impacted through the backfilling of coal pits with waste rock containing new mineral surfaces and transportable particles. Reaction fronts may propagate with the saturation of these backfill aquifers as the previously bound minerals and newly created nanomaterials provide additional release of potential contaminants. This study was implemented to identify newly available arsenic and selenium sources and effectively model their release with the weathering of waste rock from the Cordero Rojo Mine in the Powder River Basin, Wyoming. Basic forward models were constructed to replicate the typical modeling scenario for the identified mineral sources of arsenic and selenium in the Powder River Basin overburden—pyrite and gypsum, respectively. The basic forward models were unable to capture the arsenic and selenium trends recorded for leachate from a kinetic column loaded with waste rock from the Cordero Rojo Mine. Enhanced models were constructed to capture nanomaterial contributions to supplement the initially identified processes of the oxidation of arsenic-bearing pyrite and dissolution of selenium-bearing gypsum. Incorporation of the nanomaterial contributions produced modeled arsenic and selenium trends similar to the observed trends in the column leachate. The identification and modeling of newly available contaminant sources in backfill waste rock is necessary to predict the exceedance of water quality criteria for overburden formations that have not previously shown the potential for water quality contamination.

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Section: Ini Al Arsenic Model Vs Leach Columnmentioning

confidence: 98%

Section: Ini Al Arsenic Model Vs Leach Columnmentioning

confidence: 99%

Kinetic Model Evaluation of Arsenic and Selenium Sources and Mobility in Waste Rock of the Powder River Basin, USA

Langman

2024

Preprint

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“…The fate of arsenic is determined by physico-chemical conditions such as pH, redox potential, and the presence of other ions [7]. Arsenic minerals, specifically arsenopyrite which is the most prominent of them, escort bismuth-cobalt-nickel, lead-zinc-silver, tintungsten, and gold deposits [4].…”

Section: Introductionmentioning

confidence: 99%

“…Extensive studies on the oxidation of arsenopyrite underscore its role in liberating arsenic into the environment [1,7,8]. During this process, both elements, sulfur and arsenic, undergo various oxidation states.…”

Section: Introductionmentioning

confidence: 99%

Integrated Hydrological and Hydrochemical Analysis of Arsenic and Iron Behavior in Waters of a Decommissioned Tin Mine in Ehrenfriedersdorf, Germany

Rafique,

Grimmer,

Scheermann

et al. 2024

Hydrology

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Arsenic contamination poses significant challenges to environmental and public health, with mining activities contributing to its wider distribution. This study investigates the fate of arsenic and iron in mine waters at a decommissioned tin mine, now a visitor mine, located in Ehrenfriedersdorf, Germany, situated in the Free State of Saxony. Despite the general shortage of data, which is common for old mining sites, we explored the complex interplay of climatic conditions, hydrological processes, and arsenic and iron behavior in the mine waters through a comprehensive approach encompassing general site characterization, mine water monitoring, and analysis of local weather data. Over a period of three years, we conducted 14 sampling campaigns, collecting a total of 95 water samples, each consisting of three filtration subsamples, resulting in the analysis of 285 water samples. These samples were collected both aboveground and underground. Aboveground samples included mine outflows, a tailing outflow, and an adjacent creek, while underground sampling points were scattered throughout the mine initially and later focused on the identified “main” mine water system. The chemical data from the analyses were correlated with local climatic water balances to reveal distinctive patterns in arsenic and iron concentrations at various locations within the mine system. Our findings shed light on the hydrological behavior of the mine, helping to elucidate the impact of precipitation and potential evapotranspiration on arsenic and iron concentrations in a tailing outflow, in the flooded mine body, and at the portal of the main dewatering gallery. Our findings emphasize the importance of sustained monitoring and the utilization of local weather data to comprehend metalloid and metal contamination risks in similar mining environments.

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“…Numerous studies have shown that the release, migration and transformation of arsenic are closely related to organic matter [20,21] and iron-sulfur geochemical cycling processes in anaerobic environments involving soil and groundwater [22]. For example, bacterial-accelerated oxidative acidification of sulfides leads to the release of arsenic by mineral dissolution [23]. And bacterial-induced reductive dissolution of iron oxides causes the release and reduction of arsenic in the adsorbed state [24].…”

Section: Introductionmentioning

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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Arsenic release from arsenopyrite weathering in acid mine drainage: Kinetics, transformation, and effect of biochar

Cited by 9 publications

References 60 publications

Kinetic Model Evaluation of Arsenic and Selenium Sources and Mobility in Waste Rock of the Powder River Basin, USA

Kinetic Model Evaluation of Arsenic and Selenium Sources and Mobility in Waste Rock of the Powder River Basin, USA

Integrated Hydrological and Hydrochemical Analysis of Arsenic and Iron Behavior in Waters of a Decommissioned Tin Mine in Ehrenfriedersdorf, Germany

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

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