Performance of waste-based amendments to reduce metal release from mine tailings: One-year leaching behaviour

Rodríguez, Luis Carbajal; Gómez, R.; Sánchez, Virtudes; Villaseñor, José; Alonso-Azcárate, Jacinto

doi:10.1016/j.jenvman.2017.12.031

Cited by 26 publications

(13 citation statements)

References 28 publications

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“…Featuring low pH value and a high concentration of toxic metals, AMD can seriously contaminate the surrounding environment [32]. Meanwhile, due to the aeolian transport of tailing sand, metal pollution can spill to soils of the adjacent agricultural and pasture land [33]. Solid waste storage and landfill sites can also contaminate adjacent areas and cause serious damage [34].…”

Section: The Soil Plan's Main Investments and Associated Economic Impmentioning

confidence: 99%

The Economic-Environmental Impacts of China’s Action Plan for Soil Pollution Control

Wang

et al. 2019

Sustainability

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To effectively control soil pollution, an action plan (called Soil Plan) was carried out by Chinese government in 2016, which may cost CNY 1.14 trillion during the 2016–2020 period. To evaluate the potential impacts of this action plan on the national economy and environmental control, this study employed a closed macro input-output model to quantitatively account for the economic and environmental impacts from the view of the whole domestic supply chain. Our results show that the implementation of the Soil Plan may stimulate economic development and bring more jobs. It will help generate a gross domestic product (GDP) of CNY 2.72 trillion, with CNY 358.11 billion (15%) made from direct contributions, and CNY 2.36 trillion (85%) from indirect contributions. Meanwhile, the scheme could also produce 2 million jobs within five years, of which 580,000 (29%) are a direct contribution, and 1.42 million (71%) are an indirect contribution. On the other hands, increased demands for products and services of various sectors (such as power/heat production and supply, and chemical products) would also cause more air and water pollutants along with domestic supply chains. The emissions of sulfur dioxide(SO2), nitrogen oxide(NOx), chemical oxygen demand (COD) and ammonia nitrogen(NH3-N) would increase by a total of 5.20 × 105 t, 5.27 × 105 t, 1.62 × 105 t and 9.36 × 103 t, respectively. Our results may raise the concern about the indirect impacts of an environmental policy for the policy maker from both economic and environmental perspectives.

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Section: The Soil Plan's Main Investments and Associated Economic Impmentioning

confidence: 99%

The Economic-Environmental Impacts of China’s Action Plan for Soil Pollution Control

Wang

et al. 2019

Sustainability

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“…The stabilization of acid-generating tailings and contaminants released from oxidized tailings can be achieved using stabilization/solidification (S/S) techniques. Such techniques consist of adding amendments, such as alkaline materials, cementitious materials, and/or industrial sub-products, to mine wastes [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Mining amendments can be divided into two categories, depending on the objective of the amendments: (i) Alkaline amendments, which are used for increasing the neutralization potential of acid-generating tailings [15][16][17], and (ii) cementitious amendments, which are used for the impermeabilization/solidification of acidic tailings, but can also increase the neutralization potential [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…Alkaline amendments were successfully used to control and neutralize acid mine drainage under laboratory conditions during kinetic tests [1,8,11,[24][25][26][27]. Limestone is one of the most commonly used materials in alkaline amendments.…”

Section: Introductionmentioning

confidence: 99%

“…The limestone used in this study had a maximum particle size of 6.25 mm to ensure a mixture of fine and coarse particle sizes that would provide both short-and long-term reactivity. Calculations of the amount of limestone needed to neutralize the oxidized tailings were based on the neutralization potential (NP) and acid-generating potential (AP) of the limestone and the reactive tailings, as expressed in Equation (1):…”

Section: Introductionmentioning

confidence: 99%

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In Situ Effectiveness of Alkaline and Cementitious Amendments to Stabilize Oxidized Acid-Generating Tailings

et al. 2019

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This study investigates the effectiveness of alkaline and cementitious additives in the in situ stabilization of localized acid-generating tailings from a closed gold mine in Abitibi–Témiscamingue, Québec (Eagle/Telbel mine site). Five field cells (including one control) were constructed and equipped with mechanisms for collecting vertical water infiltration and surface runoff. The five cells included: (C1) Control cell; (C2) 5 wt % limestone amendment; (C3) 10 wt % limestone amendment; (C4) 5 wt % half ordinary Portland cement and half fly ash amendment; and (C5) 5 wt % ordinary Portland cement amendment. The control cell showed an acidic behavior (pH < 4.5) with variable concentrations of Fe, Al, Zn, and Cu. The amendments were used to neutralize the acidic leachates and decrease dissolved metal concentrations. Leachates from surface runoff samples of amended cells were less loaded with metals compared to samples of vertical infiltration. All amendment formulations increased the pH of the leachates from approximately 4 to circumneutral values. Furthermore, metal and metalloid concentrations were greatly limited, except for Cr and As for the carbonate-based amendments. Metal(-oid) stabilization was successfully achieved using the different amendment formulations, with the exception of C2, which still released As.

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“…The potential release of risk elements from mine tailings due to rainfall [14] and the leaching behavior of waste from the metallurgical industry were also investigated. For instance, Jensen et al [15] reported the low leachability of Pb, Cu, Cd and Zn from scrap dirt originating from iron scrap and metal recycling facilities, most probably due to the alkaline pH of the samples.…”

mentioning

confidence: 99%

Scrap Metal Deposits as Potential Sources of Enhanced Risk in Soil and Vegetation

Tůmová¹,

Száková²,

Najmanová³

et al. 2019

Pol. J. Environ. Stud.

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Metals and the metalliferous industry play an important role in contemporary human communities, and their use is connected to rising industrial development and living standards. Metals are used in numerous sectors of industry and other human activities [1]. Metallurgy, however, is one of the most serious polluters of the environment. Sectors such as ore mining, smelting and steel production produce high amounts of waste that differ in consistency and in physicochemical and mineralogical composition. At the end of their life,

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Performance of waste-based amendments to reduce metal release from mine tailings: One-year leaching behaviour

Cited by 26 publications

References 28 publications

The Economic-Environmental Impacts of China’s Action Plan for Soil Pollution Control

The Economic-Environmental Impacts of China’s Action Plan for Soil Pollution Control

In Situ Effectiveness of Alkaline and Cementitious Amendments to Stabilize Oxidized Acid-Generating Tailings

Scrap Metal Deposits as Potential Sources of Enhanced Risk in Soil and Vegetation

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