Fractional and step-wise recovery of chemical species from acid mine drainage using calcined cryptocrystalline magnesite nano-sheets: An experimental and geochemical modelling approach

Masindi, Vhahangwele; Ndiritu, John; Maree, J. P.

doi:10.1016/j.jece.2018.02.005

Cited by 37 publications

(20 citation statements)

References 45 publications

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“…PHREEQC is a computer program designed to perform a variety of aqueous geochemical calculations [24], and in numerous research works [12,13,25,26], it was used to explain and support the experimental results addressed to the behavior of contaminants during a specific treatment. Here, the PHREEQC software (USGS, Reston, VA, USA) was applied for the modelling of the aqueous speciation of the water from Lake Robule and the saturation index calculations of the solid phases formed during the treatment of lake water by flotation tailings based on the pH and concentrations In order to compare the results obtained by lake water neutralization with flotation tailings, the lake water was also neutralized with NaOH.…”

Section: Simulation Of Metal Precipitation Using Phreeqc Softwarementioning

confidence: 99%

“…Stopic et al[10] used red mud from Greece and Germany firstly for neutralization of AMD (pH value of 2.3) from South Africa and for precipitation of copper. Mwewa et al [11] performed precipitation of poly-alumino-ferric sulfate coagulant for wastewater treatment using AMD solution from South Africa.There are active and passive methods in the treatment of AMD [12,13]. The conventional method for active neutralization of the acid mine drainage is the application of Ca(OH) 2 .…”

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confidence: 99%

“…There are active and passive methods in the treatment of AMD [12,13]. The conventional method for active neutralization of the acid mine drainage is the application of Ca(OH) 2 .…”

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confidence: 99%

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Application of the Flotation Tailings as an Alternative Material for an Acid Mine Drainage Remediation: A Case Study of the Extremely Acidic Lake Robule (Serbia)

Petronijević

Stanković

Radovanović³

et al. 2019

Metals

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Flotation tailings rich in carbonate minerals from the tailings deposit of the copper mine Majdanpek (Serbia) were applied for neutralization of the water taken from the extremely acidic Lake Robule (Bor, Serbia). Tests conducted in Erlenmeyer flasks showed that after neutralization of the lake water to pH 7, over 99% of aluminum (Al), iron (Fe), and copper (Cu) precipitated, as well as 92% of Zn and 98% of Pb. In order to remove residual Mn and Ag, the water was further treated with NaOH. After treatment with NaOH, all concentrations of the metals in the lake water samples were below discharge limits for municipal wastewater according to the national legislation of the Republic of Serbia. The results of this work suggest that mining waste could be used for active neutralization of the acid mine drainage. The use of the mining waste instead of lime could reduce the costs of the active treatment of the acid mine drainage.Metals 2020, 10, 16 2 of 15 conducted by Pavlović et al. [8]. They used a laboratory scale cascade line system with three reactors for selective precipitation of metals such as iron, copper, nickel, and arsenic from the synthetic solution that resembled acidic effluent from the open pit mine from the Bor area. The neutralizing agent was 1 M NaOH. Recently, Masuda et al. [9] applied hydrated lime (Ca(OH) 2 ) for neutralization of acidity and selective precipitation of metals from the water collected from Lake Robule using semi-industrial scale equipment for active AMD treatment with two chemical reactors. Stopic et al.[10] used red mud from Greece and Germany firstly for neutralization of AMD (pH value of 2.3) from South Africa and for precipitation of copper. Mwewa et al. [11] performed precipitation of poly-alumino-ferric sulfate coagulant for wastewater treatment using AMD solution from South Africa.There are active and passive methods in the treatment of AMD [12,13]. The conventional method for active neutralization of the acid mine drainage is the application of Ca(OH) 2 . This process is fast and efficient; hydrated lime increases the pH of the solution, resulting in precipitation of the dissolved metals in the form of metal hydroxides [14]. The main disadvantage of this technology is generation of the voluminous sludge. The price of the lime and need for the dehydration, solidification, and stabilization of the sludge after treatment increase the capital and operational costs of the AMD neutralization process [14][15][16]. More recently, passive methods have been attracting more attention due to reduced energy and maintenance costs [13]. With a view toward sustainable development, many studies have focused on finding alternative materials for AMD neutralization. Kaur et al. [17] investigated the application of the waste material from the alumina refining industry (Bayer liquor and precipitates formed by sea water neutralization of the Bayer liquor) to treat AMD from mine pit water. Kefeni et al. [18] reviewed technologies for AMD treatment, including alternative approaches for AMD neutra...

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Section: Simulation Of Metal Precipitation Using Phreeqc Softwarementioning

confidence: 99%

mentioning

confidence: 99%

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Application of the Flotation Tailings as an Alternative Material for an Acid Mine Drainage Remediation: A Case Study of the Extremely Acidic Lake Robule (Serbia)

Petronijević

Stanković

Radovanović³

et al. 2019

Metals

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“…Recently, researchers have focused attention on adding a precursor to synthesize struvite from wastewater as shown in Eqn. 1 [14]. (1) Researchers have explored the use of magnesium-based-salts (magnesium hydroxide (Mg(OH) 2 ), magnesium oxide and magnesium chloride, (MgCl 2 ) as magnesium inputs for struvite production [14].…”

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confidence: 99%

“…1 [14]. (1) Researchers have explored the use of magnesium-based-salts (magnesium hydroxide (Mg(OH) 2 ), magnesium oxide and magnesium chloride, (MgCl 2 ) as magnesium inputs for struvite production [14]. These are commercial cost and it also inflates the operational cost of the proposed technology.…”

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confidence: 99%

Facile Synthesis of Struvite from Municipal Wastewater Using Pre-Treated Magnesite

2018

ASETH-18,ACABES-18 &Amp; EBHSSS-18 Nov. 19-20 2018 Cape Town (South Africa)

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In this study, the use of South African, vibratory ball milled and calcined cryptocrystalline magnesite was used for the synthesis of struvite. Employed conditions were observed to be 30 mins of mixing, 1 g of dosage at 1g: 100 mL S/L ratios. The product mineral was analyzed using X-ray diffraction and FT-IR. The water quality was observed to be safer for irrigation and discharge purposes. In that regard, this study successfully proved that the use of locally available cryptocrystalline magnesite is viable and it can be used to sustainably manage effluents emanating from municipal wastewater treatment process.

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Innovative Routes for Acid Mine Drainage (AMD) Valorization

Masindi

Tekere

2020

Recovery of Byproducts From Acid Mine Drainage Treatment

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Fractional and step-wise recovery of chemical species from acid mine drainage using calcined cryptocrystalline magnesite nano-sheets: An experimental and geochemical modelling approach

Cited by 37 publications

References 45 publications

Application of the Flotation Tailings as an Alternative Material for an Acid Mine Drainage Remediation: A Case Study of the Extremely Acidic Lake Robule (Serbia)

Application of the Flotation Tailings as an Alternative Material for an Acid Mine Drainage Remediation: A Case Study of the Extremely Acidic Lake Robule (Serbia)

Facile Synthesis of Struvite from Municipal Wastewater Using Pre-Treated Magnesite

Innovative Routes for Acid Mine Drainage (AMD) Valorization

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