Aluminium (Al) fractionation and speciation; getting closer to describing the factors influencing Al3+ in water impacted by acid mine drainage

Chamier, Jessica; Wicht, Merrill M.; Cyster, Lilburne; Ndindi, Nosintu P.

doi:10.1016/j.chemosphere.2015.01.026

Cited by 21 publications

(9 citation statements)

References 34 publications

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“…EC values showed a similar trend to that of SO 4 2− , as previously reported for waters affected by pyrite mining (Chamier, Wicht, Cyster, & Ndindi, ; Hopkins et al, ), with highly significant correlations ( r = 0.97, p < 0.01) between both parameters. The sharp drop in EC values over time also coincided with strong decreases in Ca and Mg concentrations in soil solution, again showing highly significant correlations ( r = 0.89 and 0.88, respectively; p < 0.01).…”

Section: Discussionsupporting

confidence: 86%

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Efficacy of two different reclamation strategies to improve chemical properties and to reduce Al toxicity in a lignite mine dump during a 20‐year period

et al. 2019

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In this work, the efficacy of two different strategies, used for 20 years (1992–2012) to restore a lignite mine dump, was investigated. The reclamation strategies were selection of the sterile materials, avoiding surface placement of pyritic materials, or surface application of topsoil material. Representative plots corresponding to each of both strategies were selected, as well as a control plot where reclamation techniques were not applied. An increase in total C, soluble Al, and exchangeable Al, as well as a decrease in pH, electrical conductivity, sulfate, and exchangeable cations concentrations took place during the study period. Avoiding pyritic materials on surface was the strategy giving the best acid–base conditions in the whole period, showing higher pH values (6.1–6.7) than application of topsoil (4.7–5.3), as well as the highest exchangeable Ca values (0.71–6.83 vs. 0.55–3.00 cmol(+) kg−1), and less exchange Al (0.22–2.80 vs. 0.99–3.72 cmol(+) kg−1) and soluble Al (0.04–0.60 vs. 0.19–37.47 mg L−1). Regarding fractionation of Al in soil solution, labile forms predominated throughout the study period, although organic forms (nonlabile Al and acid‐soluble Al) showed an increase over time, which was in accordance with an increase in C concentration. The most toxic Al species (Al3+ and Al‐OH) were less abundant where pyritic materials were not placed on surface, compared with plots treated with topsoil (which did not differ from control plot for most parameters). The results of the study indicate that surface application of topsoil would not be justified as strategy to effectively restore lignite mine dump areas.

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Section: Discussionsupporting

confidence: 86%

“…EC values showed a similar trend to that of SO 4 2− , as previously reported for waters affected by pyrite mining (Chamier, Wicht, Cyster, & Ndindi, 2015;Hopkins et al, 2013), with highly significant correla-…”

Section: General Characteristics Of Soilssupporting

confidence: 85%

Efficacy of two different reclamation strategies to improve chemical properties and to reduce Al toxicity in a lignite mine dump during a 20‐year period

et al. 2019

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“…The toxicity of Al in water is connected to Al speciation. The effect of AMD altered water chemistry on Al speciation and Al 3+ concentration was calculated via coupled fractionation and Visual MINTEQ speciation (Chamier et al, 2015). Water in rivers impacted by AMD presented with monomeric Al (Almon) concentrations between 0.35 and 15.37mg/L which existed almost exclusively in the toxic labile form (98%).…”

Section: In Park Walton Mine In the Melrose Miningmentioning

confidence: 99%

Mine Drainage Generation and Control Options

Wei

Rodak

Zhang

et al. 2016

Water Environment Research

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This review provides a snapshot of papers published in 2015 relevant to the topic of mine drainage generation and control options. The review is broken into 3 sections: Generation, Prediction and Prevention, and Treatment Options. The first section, mine drainage generation, focuses on the characterization of mine drainage and the environmental impacts. As such, it is broken into three subsections focused on microbiological characterization, physiochemical characterization, and environmental impacts. The second section of the review is divided into two subsections focused on either the prediction or prevention of acid mine drainage. The final section focuses on treatment options for mine drainage and waste sludge. The third section contains subsections on passive treatment, biological treatment, physiochemical treatment, and a new subsection on beneficial uses for mine drainage and treatment wastes.

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“…Of the metals, Al(III) has received less attention from researchers, yet it is as much toxic as the so-called heavy metals [22,30,46]. Secondly, Al(III) is the most sensitive to high conductivity and low pH conditions, which are both characteristic of AMD, where it readily leaches from geologic material to contaminate water resources [7]. Hence in this study, Al(III) was used to investigate the adsorption efficiency of the synthesized HLIX.…”

Section: Introductionmentioning

confidence: 99%

Acid mine drainage pollution remediation using hybrid chelating ion-exchange/HZrO2 nanocomposite adsorbents

et al. 2019

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Environmental pollution due to acid mine drainage (AMD) is a worldwide concern because of its high content of toxic metals and acidity. The toxic metal species present in AMD tends to affect negatively the whole ecological system where it is discharged, and this requires an elective solution to remedy the environment. In this study, hydrated ZrO 2 nanoparticles (HZO) were irreversibly dispersed within chelating ion-exchange resins using the precipitation method, resulting in HZO-260, HZO-207, HZO-214, HZO-4195 and HZO-900 organic/inorganic nanosorbents which were used for the removal of metals from AMD. The synthesized nanosorbents were characterized using SEM-EDS, FTIR and XRD. The effect of time, adsorbent dosage and pH on Al(III) adsorption was investigated using the batch technique. The SEM-EDS confirmed the incorporation of HZO within all the parent resins, while XRD showed that the hybrid materials were amorphous. The adsorption of Al(III) occurred through physisorption and was favourable only onto HZO-260 as revealed by the data modelling. Metal levels were determined using the ICP-OES technique. The HZO-260 removed 100% Al(III) in acidic conditions and was successfully regenerated for reuse using a NaCl-NaOH binary solution (pH > 12). HZO-260 removed selected metals (Al, Cr, Mn, Fe, Ni, Co, Cu, Zn, Pb and Cd) from environmental AMD. Therefore, HZO-260 has a promising potential as an adsorbent for AMD remediation.

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Aluminium (Al) fractionation and speciation; getting closer to describing the factors influencing Al3+ in water impacted by acid mine drainage

Cited by 21 publications

References 34 publications

Efficacy of two different reclamation strategies to improve chemical properties and to reduce Al toxicity in a lignite mine dump during a 20‐year period

Efficacy of two different reclamation strategies to improve chemical properties and to reduce Al toxicity in a lignite mine dump during a 20‐year period

Mine Drainage Generation and Control Options

Acid mine drainage pollution remediation using hybrid chelating ion-exchange/HZrO2 nanocomposite adsorbents

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