Mechanisms of arsenic attenuation in acid mine drainage from Mount Bischoff, western Tasmania

Gault, A. G.; Cooke, David R.; Townsend, Ashley T.; Charnock, John; Polya, David A.

doi:10.1016/j.scitotenv.2004.10.030

Cited by 71 publications

(26 citation statements)

References 45 publications

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“…/As 5? bond as inner sphere bidentate complexes or substitute for SO 4 2-in jarosite and schwertmannite (Gault et al 2005). Similar findings were also reported from the Iberian pyritic belt, in Spain, with a predominant pentavalent state of As on Fe precipitates, while both As 5?…”

Section: H N (Aso 3 ) N23 -H N (Aso 4 ) N23 Redox Dynamicssupporting

confidence: 84%

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Arsenic Geochemistry of Acid Mine Drainage

Paikaray

2014

Mine Water Environ

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Due to geochemical similarity between arsenic and sulphur, polymetallic sulphide deposits and pyrite/ arsenopyrite-bearing coal beds often contain exceptionally high concentrations of arsenic. Arsenic release from mine waste occurs after oxidative dissolution of sulphide minerals. Both arsenite and arsenate forms coexist in many mine drainage localities, with the latter oxidation state more common. The rate of arsenite oxidation to arsenate in such environments is mostly controlled by the availability of oxygen and arsenic-oxidizing microbes. Most released arsenic gets naturally attenuated within few meters downstream by adsorption and co-precipitation; amorphous precipitates such as schwertmannite or hydrous ferric oxides are better sinks than crystalline counterparts, such as goethite and jarosite. Because arsenate has a stronger affinity than arsenite for sorbents at acidic pH, arsenatedominated mine water often contains lower levels of arsenic than arsenite-dominated mine water. Secondary mineral precipitation is largely controlled by distribution of acid-neutralizing minerals, such as carbonates and aluminosilicates. In addition to natural attenuation, active and passive treatment of mine water can lower arsenic levels to meet legal limits.

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Section: H N (Aso 3 ) N23 -H N (Aso 4 ) N23 Redox Dynamicssupporting

confidence: 84%

“…, is the most commonly observed state (Table 3). Gault et al (2005) reports As 5? associated with hydrous ferric oxides (HFO) and jarosite 40 m downstream of a mine adit.…”

Section: H N (Aso 3 ) N23 -H N (Aso 4 ) N23 Redox Dynamicsmentioning

confidence: 99%

Arsenic Geochemistry of Acid Mine Drainage

Paikaray

2014

Mine Water Environ

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“…4 AMD and acid rock drainage (ARD) are typically associated with sulfide mineral leaching, 5 so acid mining environments are of particular concern because of the potential hazard posed by arsenic pollution. 4,6 Because pyrite (Fe 2 S) and/or other iron-bearing sulfides such as chalcopyrite (CuFeS 2 ) are the main source of acidity in AMD and ARD environments, these fluids are typically rich in iron.…”

Section: Introductionmentioning

confidence: 99%

The surface of enargite after exposure to acidic ferric solutions: an XPS/XAES study

Fantauzzi

Elsener

Atzei

et al. 2007

Surface & Interface Analysis

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Enargite surface reactivity in acidic ferric solutions simulating the acid mine drainage (AMD) environment has been investigated by X-ray photoelectron (XPS) and X-ray excited Auger electron spectroscopy (XAES) surface analysis. Natural enargite samples from a Peruvian mine with close to the nominal composition Based also on the quantitative XPS determinations, the surface of the reacted enargite can be described as a layered structure: a thin copper-deficient enargite layer (up to 0.7 nm) is formed on a slightly sulfurenriched enargite surface, the arsenic content remaining constant.

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“…It has abundant minerals such as copper, silver, and gold, which have been extracted since 1885, and produces large amounts of copper pyrite, quartz, hematite, and dolomite (Raymond 1996;Corbett 2001). Intensive exploitation for more than 100 years has inevitably brought negative effects on the ecosystem in this area, including a drop in the water level, land subsidence, soil acidification, decreased vegetation coverage, and a vulnerable ecological environment (Featherstone and O'Grady 1997;Stauber et al 2000;Gault et al 2005). Dexing copper mine is the largest open-cast mine in China and is the second largest in the world.…”

Section: Study Area and Remote Sensing Datamentioning

confidence: 99%

Application of hyperspectral remote sensing for environment monitoring in mining areas

Zhang

et al. 2011

Environ Earth Sci

116

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Environmental problems caused by extraction of minerals have long been a focus on environmental earth sciences. Vegetation growing conditions are an indirect indicator of the environmental problem in mining areas. A growing number of studies in recent years made substantial efforts to better utilize remote sensing for dynamic monitoring of vegetation growth conditions and the environment in mining areas. In this article, airborne and satellite hypersectral remote sensing data-HyMap and Hyperion images are used in the Mount Lyell mining area in Australia and Dexing copper mining area in China, respectively. Based on the analyses of biogeochemical effect of dominant minerals, the vegetation spectrum and vegetation indices, two hyperspectral indices: vegetation inferiority index (VII) and water absorption disrelated index (WDI) are employed to monitor the environment in the mining area. Experimental results indicate that VII can effectively distinguish the stressed and unstressed vegetation growth situation in mining areas. The sensitivity of VII to the vegetation growth condition is shown to be superior to the traditional vegetation index-NDVI. The other index, WDI, is capable of informing whether the target vegetation is affected by a certain mineral. It is an important index that can effectively distinguish the hematite areas that are covered with sparse vegetation. The successful applications of VII and WDI show that hyperspectral remote sensing provides a good method to effectively monitor and evaluate the vegetation and its ecological environment in mining areas.

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Mechanisms of arsenic attenuation in acid mine drainage from Mount Bischoff, western Tasmania

Cited by 71 publications

References 45 publications

Arsenic Geochemistry of Acid Mine Drainage

Arsenic Geochemistry of Acid Mine Drainage

The surface of enargite after exposure to acidic ferric solutions: an XPS/XAES study

Application of hyperspectral remote sensing for environment monitoring in mining areas

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