Pollution control and metal resource recovery for acid mine drainage

Chen, Tao; Yan, Bo; Lei, Chang; Xiao, Xianming

doi:10.1016/j.hydromet.2014.04.024

Cited by 109 publications

(37 citation statements)

References 44 publications

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“…The AMD neutralization can be verified in the sampling points P2, P3, P6, and P7 that exhibited high sulfate and low iron concentrations. Iron will precipitate if pH is above or close to 3.5 (AlHashimi et al 1996;Chen et al 2014), whereas at pH below 3.5, a few or no iron precipitation occurs (Al-Hashimi et al 1996). However, at pH values near or below 3.5, Fe(III) concentration increases in solution, acting as an oxidizing agent for pyrite in AMD (Lottermoser 2010).…”

Section: Amd Indicatorsmentioning

confidence: 99%

Hydrogeochemical features of surface water and groundwater contaminated with acid mine drainage (AMD) in coal mining areas: a case study in southern Brazil

Galhardi

Bonotto

2016

Environ Sci Pollut Res

120

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Effects of acid mine drainage (AMD) were investigated in surface waters (Laranjinha River and Ribeirão das Pedras stream) and groundwaters from a coal mining area sampled in two different seasons at Figueira city, Paraná State, Brazil. The spatial data distribution indicated that the acid effluents favor the chemical elements leaching and transport from the tailings pile into the superficial water bodies or aquifers, modifying their quality. The acid groundwaters in both sampling periods (dry: pH 2.94-6.04; rainy: pH 3.25-6.63) were probably due to the AMD generation and infiltration, after the oxidation of sulfide minerals. Such acid effluents cause an increase of the solubilization rate of metals, mainly iron and aluminum, contributing to both groundwater and surface water contamination. Sulfate in high levels is a result of waters' pollution due to AMD. In some cases, high sulfate and low iron contents, associated with less acidic pH values, could indicate that AMD, previously generated, is nowadays being neutralized. The chemistry of the waters affected by AMD is controlled by the pH, sulfide minerals' oxidation, oxygen, iron content, and microbial activity. It is also influenced by seasonal variations that allow the occurrence of dissolution processes and the concentration of some chemical elements. Under the perspective of the waters' quality evaluation, the parameters such as conductivity, dissolved sodium, and sulfate concentrations acted as AMD indicators of groundwaters and surface waters affected by acid effluents.

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Section: Amd Indicatorsmentioning

confidence: 99%

Hydrogeochemical features of surface water and groundwater contaminated with acid mine drainage (AMD) in coal mining areas: a case study in southern Brazil

Galhardi

Bonotto

2016

Environ Sci Pollut Res

120

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“…One example of mining tailing waste water from the Sudbury region of Ontario (Canada) contains 10 ppm copper, 20 ppm nickel, and an average calcium concentration of 250 ppm at a pH of approximately 4.0 . Unlike organic waste, these metal ions are never biodegradable and they will not easily precipitate into a carbonate form due to the acidic matrix . The accumulation of copper and nickel ions in the food chain may cause damage to the central nervous system of animals such as humans.…”

Section: Introductionmentioning

confidence: 99%

Selective separation of copper and nickel ions from aqueous solutions containing calcium by emulsion liquid membranes using central composite design

Kökkılıç

Langlois

et al. 2019

Can J Chem Eng

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The emulsion liquid membrane technique was utilized to selectively extract copper and nickel from a synthetic aqueous solution containing calcium, which was used to mimic a tailings stream found in the Sudbury region of Canada. The results showed copper and nickel ions were successively extracted from the synthetic solution. Two central composite designs and an analysis of the experiments were used to optimize the process and determine the main effects and interactions of experimental factors. In the first stage, copper was extracted with a minimum removal of nickel and calcium. It was found that under optimum conditions 98 % of the copper was extracted, with only 0.9 % of the nickel and 1.3 % of the calcium being extracted. The subsequent copper stripping efficiency was 95.7 %. In the second stage, the remaining aqueous solution was treated to remove nickel with minimum calcium removal. During this stage, the corresponding nickel and calcium removal percentages were 99.0 and 0.55 %, respectively, with a nickel stripping efficiency of 84.1 %. Laboratory bench‐scale tests using a two‐stage mixer‐settler showed a good correlation with these results when moving to a semi‐continuous process, which extracted 99.7 % of the copper and 98.2 % of the nickel, with only 2.2 % calcium extraction.

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“…Acid mine drainage, as one of the major environmental pollution problems, is associated with historic and current mining industries [1,23]. It causes problems to current and future generations because of its high heavy metal content and strong acidity [24].…”

Section: Introductionmentioning

confidence: 99%

The study of leachability and toxicity of sludge after neutralization of Saraka and Robule AMD wastewaters

Gardic¹,

Marković²,

Masuda³

et al. 2017

J Min Metall A

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Acid mine drainage (AMD) waters are one of the most important ecological risks at the global level because of its high heavy metals content and strong acidity. Treatment of AMD water is a complex and expensive. One of the most widely used treatment process is the neutralization process of AMD. The result of neutralization is the production of sludge which may contain various other (heavy) metals, depending on the chemical characteristics of the mine water treated. In this paper, leachability and toxicity of the sludges obtained during the neutralization process of wastewater from Saraka and Robule acid mine drainage and the sludges after the stabilization process at different temperatures is tested. Sludge produced in the neutralization process of Robule AMD R4 (40)

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Pollution control and metal resource recovery for acid mine drainage

Cited by 109 publications

References 44 publications

Hydrogeochemical features of surface water and groundwater contaminated with acid mine drainage (AMD) in coal mining areas: a case study in southern Brazil

Hydrogeochemical features of surface water and groundwater contaminated with acid mine drainage (AMD) in coal mining areas: a case study in southern Brazil

Selective separation of copper and nickel ions from aqueous solutions containing calcium by emulsion liquid membranes using central composite design

The study of leachability and toxicity of sludge after neutralization of Saraka and Robule AMD wastewaters

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