Use of organic covers for acid mine drainage control

Peppas, Athanasios; Komnitsas, Kostas; Halikia, I.

doi:10.1016/s0892-6875(00)00036-4

Cited by 126 publications

(55 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is an acidic leachate with high concentrations of heavy metals and sulfate that result from the oxidation of sulfidic minerals. AMD can severely contaminate surface and ground-water, as well as soils [74][75][76]. For example, at the Summitville gold mine in Colorado, AMD polluted seventeen miles of the Alamosa River, severely impacting aquatic life.…”

Section: Negative Impactsmentioning

confidence: 99%

Eliciting Drivers of Community Perceptions of Mining Projects through Effective Community Engagement

et al. 2016

View full text Add to dashboard Cite

Sustainable mining has received much attention in recent years as a consequence of the negative impacts of mining and public awareness. The aim of this paper is to provide mining companies guidance on improving the sustainability of their sites through effective community engagement based on recent advances in the literature. It begins with a review of the literature on sustainable development and its relationship to stakeholder engagement. It then uses the literature to determine the dominant factors that affect community perceptions of mining projects. These factors are classified into five categories: environmental, economic, social, governance and demographic factors. Then, we propose a new two-stage method based on discrete choice theory and the classification that can improve stakeholder engagement and be cost-effective. Further work is required to validate the proposed method, although it shows potential to overcome some of the challenges plaguing current approaches.

show abstract

Section: Negative Impactsmentioning

confidence: 99%

Eliciting Drivers of Community Perceptions of Mining Projects through Effective Community Engagement

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Acid mine drainage (AMD) is highly acidic and contains large quantities of Fe ions (Fe 2+ and Fe 3+ ) and heavy metal elements [1][2][3][4][5][6]. It not only corrodes the pipes in mine wells and other related equipment, but also heavily pollutes surface water and land resources [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…At present, lime neutralization has been widely adopted owing to its convenience and speed. This process has been reported to raise the pH level and remove Fe and SO 4 2− ions from the AMD system through the formation of Fe(OH) 3 , Fe(OH) 2 , and CaSO 4 . However, this method has serious disadvantages with respect to the higher operating costs and difficulty of dewatering the waste residue [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Influence of Monovalent Cations on the Efficiency of Ferrous Ion Oxidation, Total Iron Precipitation, and Adsorptive Removal of Cr(VI) and As(III) in Simulated Acid Mine Drainage with Inoculation of Acidithiobacillus ferrooxidans

Song

Wang

Yang

et al. 2018

Metals

View full text Add to dashboard Cite

Acid mine drainage is highly acidic and contains large quantities of Fe and heavy metal elements. Thus, it is important to promote the transformation of Fe into secondary iron minerals that exhibit strong heavy-metal removal abilities. Using simulated acid mine drainage, this work analyzes the influence of monovalent cations (K + , NH 4 + , and Na + ) on the Fe 2+ oxidation and total Fe deposition efficiencies, as well as the phases of secondary iron minerals in an Acidithiobacillus ferrooxidans system. It also compares the Cr(VI) (K 2 Cr 2 O 7 ) and As(III) (As 2 O 3 ) removal efficiencies of different schwertmannites. The results indicated that high concentrations of monovalent cations (NH 4 + ≥ 320 mmol/L, and Na + ≥ 1600 mmol/L) inhibited the biological oxidation of Fe 2+ . Moreover, the mineralizing abilities of the three cations differed (K + > NH 4 + > Na + ), with cumulative Fe deposition efficiencies of 58.7%, 28.1%, and 18.6%, respectively [n(M) = 53.3 mmol/L, cultivation time = 96 h]. Additionally, at initial Cr(VI) and As(III) concentrations of 10 and 1 mg/L, respectively, the Cr(VI) and As(III) removal efficiencies exhibited by schwertmannites acquired by the three mineralization systems differed [n(Na) = 53.3 > n(NH 4 ) = 53.3 > n(K) = 0.8 mmol/L]. Overall, the analytical results suggested that the removal efficiency of toxic elements was mainly influenced by the apparent structure, particle size, and specific surface area of schwertmannite.

show abstract

“…Exposure of SS to atmospheric oxygen in surface layer applications has been found to result in rapid aerobic degradation and nitrification (Peppas et al 2000). Applications may be more applicable as a subsurface SL, which would minimise dehydration and oxygen exposure, but that may be prone to anaerobic degradation processes such as methanogenesis and sulphate reduction.…”

Section: Introductionmentioning

confidence: 99%

Using sewage sludge as a sealing layer to remediate sulphidic mine tailings: a pilot-scale experiment, northern Sweden

2013

View full text Add to dashboard Cite

At the Kristineberg mine, northern Sweden, sulphidic mine tailings were remediated in an 8-year pilotscale experiment using sewage sludge to evaluate its applicability as a sealing layer in a composite dry cover. Sediment, leachate water, and pore gas geochemistry were collected in the aim of determining if the sludge was an effective barrier material to mitigate acid rock drainage (ARD) formation. The sludge was an effective barrier to oxygen influx as it formed both a physical obstruction and functioned as an organic reactive barrier to prevent oxygen to the underlying tailings. Sulphide oxidation and consequential ARD formation did not occur. Sludge-borne trace elements accumulated in a reductive, alkaline environment in the underlying tailings, resulting in an effluent drainage geochemistry of Cd, Cu, Pb and Zn below 10 lg/L, high alkalinity (810 mg/L) and low sulphate (38 mg/L). In contrast, the uncovered reference tailings received a 0.35-m deep oxidation front and typical ARD, with dissolved concentrations of Cd, Zn and sulphate, 20.8 lg/L, 16,100 lg/L and 1,390 mg/L, respectively. Organic matter degradation in the sludge may be a limiting factor to the function of the sealing layer over time as 85 % loss of the organic fraction occurred over the 8-year experimental period due to aerobic and anaerobic degradation. Though the cover may function in the short to medium term (100 years), it is unlikely to meet the demands of a longterm remedial solution.

show abstract

Use of organic covers for acid mine drainage control

Cited by 126 publications

References 4 publications

Eliciting Drivers of Community Perceptions of Mining Projects through Effective Community Engagement

Eliciting Drivers of Community Perceptions of Mining Projects through Effective Community Engagement

Influence of Monovalent Cations on the Efficiency of Ferrous Ion Oxidation, Total Iron Precipitation, and Adsorptive Removal of Cr(VI) and As(III) in Simulated Acid Mine Drainage with Inoculation of Acidithiobacillus ferrooxidans

Using sewage sludge as a sealing layer to remediate sulphidic mine tailings: a pilot-scale experiment, northern Sweden

Contact Info

Product

Resources

About