Acid mine drainage: Challenges and opportunities

Simate, Geoffrey S.; Ndlovu, Sehliselo

doi:10.1016/j.jece.2014.07.021

Cited by 504 publications

(288 citation statements)

References 91 publications

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“…The generation of AMD is a series of complicated chemical and biological reactions and mineral dissolution processes [13]. The mechanism of the generation of AMD is as follows [14] 3. When H + ions are generated, toxic metal ions in the tailings should be dissolved and AMD comes into being [15].…”

Section: Pollution Of Traditional Mine Tailings Storage Facilitiesmentioning

confidence: 99%

Improvement of Traditional Mining Tailings Storage Facilities

Wang¹,

Zhao²,

Li³

et al. 2016

JRST

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ABSTRACT:Traditional mining tailings storage facilities may generate calamities and contaminants that cause the infiltration of tailings dam and even lead to dam failures. In view of this, new tailings storage facilities are designed in this paper by combining traditional tailings storage facilities with barrier systems including a vertical drainage system, a compound liner system, a fluid collection system and a caps system. With the vertical drainage system, water in contact with tailings can be transported into the fluid collection system. With the compound liner system, fluid can find a waterproof environment, which prevents the contamination of the environment such as surface water, groundwater, soil and food chain. With the fluid collection system, water in contact with tailings and fluid can be collected and removed to wastewater treatment plants, thus avoiding dam failure and aMD generation caused by the reaction of iron sulphides with water and oxygen.

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Section: Pollution Of Traditional Mine Tailings Storage Facilitiesmentioning

confidence: 99%

Improvement of Traditional Mining Tailings Storage Facilities

Wang¹,

Zhao²,

Li³

et al. 2016

JRST

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“…AMD is a result of the oxidation of sulphide-containing ores (such as pyrite) from mining activities, due to the increase in exposure of these minerals to water, air and microorganisms (Simate and Ndlovu, 2014). AMD is characterised by a low pH and the acidity of the water liberates metals, including toxic metals and radionuclides, from the rocks with which it interacts.…”

Section: Introductionmentioning

confidence: 99%

“…Ettringite represents a group of acicular calcium aluminate hydrates (Damons and Petersen, 2002). The crystal structure of ettringite is illustrated in Figure 1 (Sapsford et al, 2015). The channels between these columns are made up of SO 4 2-and water (Damons and Petersen, 2002 Figure 2 shows the stability region of ettringite in alkaline environments.…”

Section: Introductionmentioning

confidence: 99%

Case study modelling for an ettringite treatment process

Germishuizen

Franzsen²,

Grobler³

et al. 2018

WSA

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Several technologies have been developed to treat acid mine drainage (AMD) and attention is shifting towards the removal of sulphate. The formation of ettringite, a hydrous calcium aluminium sulphate mineral, is an option to treat AMD and can reduce the sulphate concentration to well below the discharge specifications. The process modelled in this study includes the formation of ettringite and the recovery of gibbsite through the decomposition of recycled ettringite. The modelling of this process was done using PHREEQC and the results presented in this paper are based on the outcome of different case studies that investigated how the process is affected by a change in parameters. These include, changing the feed water pH, altering the split fractions in the hydrocyclone for the gibbsite recovery and varying the pH for ettringite formation.

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“…[48][49][50][51] However, out of above technology, some have disadvantage like, production of secondary waste (sludge), toxicity, high operation and maintenance costs, skilled personal requirement, reduced efficiency, required excess land and expenses for treatment and management of acid mine drainage, which bound the use of the majority of developed technologies. [52][53][54] However the adsorption process relatively appears to be a suitable method for treatment of acid mine …”

Section: Introductionmentioning

confidence: 99%

Treatment of Acid Mine Drainage Using a Sandstone Column

2017

RJC

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Acid mine drainage (AMD) or Acid rock drainage (ARD) from mining industry poses worldwide severe environmental problems including India also. In this study, heavy metal removal was tested in AMD samples collected from the Gorbi abandoned coal mine (India), having iron concentrations of 75 mg/L. Sandstone was collected from mine sites and converted into powders form and used as low-cost adsorbent in a column to treat acid mine drainage (AMD) obtained from the inactive Gorbi opencast coal mines (Singrauli coalfields, NCL). The pH value of the pit water sample improved from 2.48 to 3.90, along with the removal of, 100 % total iron, Lead (Pb), Cadmium (Cd), 71% of the electrical conductivity, 73% total dissolved solids and 50% of the salinity.

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Acid mine drainage: Challenges and opportunities

Cited by 504 publications

References 91 publications

Improvement of Traditional Mining Tailings Storage Facilities

Improvement of Traditional Mining Tailings Storage Facilities

Case study modelling for an ettringite treatment process

Treatment of Acid Mine Drainage Using a Sandstone Column

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