Sources, migration and transformation of antimony contamination in the water environment of Xikuangshan, China: Evidence from geochemical and stable isotope (S, Sr) signatures

Wen, Bing; Zhou, Jianwei; Zhou, Aiguo; Liu, Cunfu; Xie, Lan

doi:10.1016/j.scitotenv.2016.05.124

Cited by 59 publications

(14 citation statements)

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“…Its geographical coordinates are 111°27 0 30″-111°3 0 0 30″ east and 27°30 0 44 00 -27°48 0 00 00 north (Figure 1). This mine covers an area of 26 km 2 , divided into southern mining area and northern mining area, known as the 'antimony capital of the world' (Wen et al 2016).…”

Section: Study Area Descriptionmentioning

confidence: 99%

“…The concentrations of bicarbonate were determined by acid-base titration (Wen et al 2018). The Sb concentration was measured using an Agilent 7700Â inductively coupled mass spectrometer (ICP-MS) with indium as the internal standard (Wen et al 2016). The values for pH and total dissolved solids (TDS) were obtained in the field using a portable pH meter (HANNA H18424) and a portable conductivity meter (HANNA H1833), respectively (Wen et al 2016(Wen et al , 2018.…”

Section: Sample Analysismentioning

confidence: 99%

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Spatial distribution, geochemical behaviors and risk assessment of antimony in rivers around the antimony mine of Xikuangshan, Hunan Province, China

Sheng

Hao

Guan

et al. 2022

Water Science and Technology

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Pollutants derived from antimony (Sb) mining can easily cause pollution of surrounding water bodies. However, qualitative source analysis of river pollution is mostly conducted, and quantitative source analysis is still lacking. A total of 21 water samples were collected to analyze the pollution status of the heavy metal element Sb, explore the Xikuangshan (XKS) area river heavy metals pollution mechanism, quantitative analysis the sources of pollution, and carry out irrigation water suitability assessment and potential ecological risk assessment. The results showed that, compared with the mining non-affected area, the maximum excess multiple of Sb in surface water and rivers in Hunan XKS area is 411.31. When the river fluid flows through the mining-affected area, the heavy metal element Sb content increases rapidly, and then decreases due to dilution process. Positive matrix factorization (PMF) source analysis showed that the main source of Sb pollution in the rivers is the impact of mining and smelting (83.60%), followed by the role of waste rock leaching (16.40%). After irrigation, 27.78% of the river water had strong ecological risks, and 16.67% had extremely strong ecological risks. This achievement provides a theoretical basis and technical guarantee for protecting and using the local water body of the mining area.

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Section: Study Area Descriptionmentioning

confidence: 99%

Section: Sample Analysismentioning

confidence: 99%

Spatial distribution, geochemical behaviors and risk assessment of antimony in rivers around the antimony mine of Xikuangshan, Hunan Province, China

Sheng

Hao

Guan

et al. 2022

Water Science and Technology

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“…Water drains out mainly through springs and flows into the Qingfeng River. Residential areas and factories, as well as some waste rocks and slags from mining and smelting, are stacked above D 3 x 4 (Wen et al, 2016;Xie et al, 2016).…”

Section: Study Areamentioning

confidence: 99%

Morphological Distribution and Formation Mechanisms of Antimony in the Shallow Groundwater of the Xikuangshan Antimony Mine in Hunan, China

Sun

Li²,

Liu

et al. 2022

Front. Environ. Sci.

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The century-old mining development and utilization of antimony (Sb) ore in Xikuangshan (XKS) mine, groundwater antimony pollution has attracted great attention. At present, the sources and geochemical behaviors of high Sb groundwater in this area have been widely recognized, but morphological distribution and formation mechanisms of Sb(V) and Sb(III) in shallow groundwater were still little known. Forty-three groundwater samples of Magunao aquifer (D3x4) were collected between June and September 2020 to determine morphological distribution and formation mechanisms of Sb valence state in the recharge area, runoff area and discharge area. The range of Sb content in the recharge area, runoff area, and discharge area of the D3x4 water was 3.300 × 10−3–7.982 mg/L, 1.760 × 10−2–17.326 mg/L and 1.230 × 10−2–16.773 mg/L, respectively. The D3x4 water is dominated by Sb(V), which form was Sb(OH)6−. The Sb(V) mainly comes from the oxidative dissolution of Sb2S3, the mining activities, and the leaching of arsenic alkali residues. The silicate mineral weathering, carbonate mineral dissolution, and ion exchange promote the dissolution of Sb2S3. At the same time, redox and competitive adsorption in the runoff area increase the Sb(V) content in the water environment. The results of this research provide an understanding of the mechanism of Sb pollution in shallow groundwater and will help in controlling water-environment pollution and securing water-resource in mining areas.

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“…Although Sb is ubiquitously present at low concentrations (0.2-1 µg g − 1 ) in nature [4], anthropogenic activities such as mining and smelting have led to Sb contamination in the environment [5][6][7]. Typically, two oxidation states of Sb, namely antimonite (Sb(III)) and antimonate (Sb(V)), are the main forms of Sb in nature [9,10].…”

Section: Introductionmentioning

confidence: 99%

Bacteria Responsible for Nitrate-dependent Antimonite Oxidation in Antimony-contaminated Paddy Soil Revealed by the Combination of DNA-SIP and Metagenomics

Zhang

Häggblom

et al. 2020

Preprint

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Background: Antimonite (Sb(III)) oxidation (SbO) can decrease the toxicity of antimony (Sb) and its uptake into plants (e.g., rice), thus serving an ecological role in bioremediation of Sb contamination. In some anoxic environments, Sb(III) can be oxidized coupled with nitrate as the electron acceptor. Here we investigate the potential for nitrate-dependent SbO in Sb contaminated rice paddies and identify nitrate-dependent Sb(III)-oxidizing bacteria (SbOB) using stable isotope probing (SIP) coupled with amplicon and shotgun metagenomic sequencing.Results: Anaerobic SbO was exclusively observed in the paddy soil amended with both Sb(III) and NO3-, whereas no apparent SbO was detected in the soil amended with Sb(III) only. The increasing abundance of the arsenite oxidase (aioA) gene suggests that nitrate-dependent SbO was catalysed by microorganisms harbouring the aioA gene. After 60-day DNA-SIP incubation, obvious shift in the aioA gene to heavy DNA fractions only in the treatment amended with 13C-NaHCO3, Sb(III) and NO3- suggested the incorporation of 13C by nitrate-dependent SbOB. Accordingly, DNA-SIP identified a number of putative nitrate-dependent SbOB in the paddy soil, including Azoarcus, Azospira and Chelativorans. Metagenomic analysis further revealed that they contained aioA gene and genes involved in denitrification and carbon fixation, supporting their capability for nitrate-dependent SbO.Conclusions: These observations in this study suggested the occurrence of nitrate-dependent SbO in paddy soils. A number of putative nitrate-dependent SbOB (i.e., Azoarcus, Azospira and Chelativorans) were reported here, which expands our current knowledge regarding the diversity of nitrate-dependent SbOB. In addition, this study provides a proof of concept using DNA-SIP to identify nitrate-dependent SbOB.

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Sources, migration and transformation of antimony contamination in the water environment of Xikuangshan, China: Evidence from geochemical and stable isotope (S, Sr) signatures

Cited by 59 publications

References 56 publications

Spatial distribution, geochemical behaviors and risk assessment of antimony in rivers around the antimony mine of Xikuangshan, Hunan Province, China

Spatial distribution, geochemical behaviors and risk assessment of antimony in rivers around the antimony mine of Xikuangshan, Hunan Province, China

Morphological Distribution and Formation Mechanisms of Antimony in the Shallow Groundwater of the Xikuangshan Antimony Mine in Hunan, China

Bacteria Responsible for Nitrate-dependent Antimonite Oxidation in Antimony-contaminated Paddy Soil Revealed by the Combination of DNA-SIP and Metagenomics

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