Improving Properties of Sealing Layers Made of Till by Adding Green Liquor Dregs to Reduce Oxidation of Sulfidic Mine Waste

Mäkitalo, Maria; Mácsik, Josef; Maurice, Christian; Öhlander, Björn

doi:10.1007/s10706-015-9886-4

Cited by 18 publications

(11 citation statements)

References 4 publications

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“…2). These would be expected to thaw during the summer and would not cause remaining channels because of GLD's high plasticity [10]. It has previously been shown that subjecting GLD to repeated freeze-thaw cycles did not affect its hydraulic properties [10].…”

Section: Changes In Physical Propertiesmentioning

confidence: 99%

“…The GPR data also revealed a section of the sealing layer that appeared paler than the rest, which was attributed to the accumulation of water above the sealing layer resulting in a weakening of the GPR signal. A rupture of the layer was considered unlikely due to the material's softness and plasticity [10]. In some places, the sealing layer had been compressed or dislocated horizontally, causing its thickness to decline from the original 50 cm at the time of application to 20 cm six years later.…”

Section: Changes In Physical Propertiesmentioning

confidence: 99%

“…However, the material's low shear strength may cause problems and reduce its long-term performance as a sealing layer because compression could reduce the layer's thickness and reduce its resistance to the passage of water and oxygen. Blending GLD with till to take advantage of the former's favorable hydraulic properties and the latter's mechanical properties has been demonstrated to produce a cover material with improved shear strength [10]. Adding fly ash has also been reported to increase the shear strength of the GLD [11,29].…”

Section: Changes In Physical Propertiesmentioning

confidence: 99%

“…This alkaline inorganic waste contains calcite, brucite, amorphous phases and insoluble solids, and is known to have low hydraulic conductivity (<10 -8 m/s) and a high water retention capacity [8]. Previous studies have shown it could be a viable alternative to traditional materials for the construction of sealing layers [8,[10][11]. However, there is a lack of information on its long-term performance, which is required before it can be considered a general solution.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Prediction of the long-term performance of green liquor dregs as a sealing layer to prevent the formation of acid mine drainage

Mäkitalo

Maurice

et al. 2016

Journal of Environmental Chemical Engineering

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Section: Changes In Physical Propertiesmentioning

confidence: 99%

Section: Changes In Physical Propertiesmentioning

confidence: 99%

Section: Changes In Physical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Prediction of the long-term performance of green liquor dregs as a sealing layer to prevent the formation of acid mine drainage

Mäkitalo

Maurice

et al. 2016

Journal of Environmental Chemical Engineering

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“…Green liquor dregs (GLD), an alkaline and inorganic residual waste, was investigated for its feasibility as an additive to improve low quality till in the construction of sealing layers in cover system designs for sulfidebearing mine waste (Makitalo et al, 2015). The hydraulic conductivity and water retention capacity of the till could be improved by the addition of 10% GLD, increasing the efficiency of the cover system.…”

Section: Roasting Of Lead-zinc Tailings In a Rotary Furnacementioning

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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Impact of Paper Mill Waste on Physicochemical Properties of Soil, Crop Yield, and Chemical Composition of Plants

Żołnowski¹,

Sadej²,

Suski³

et al. 2019

CLEAN Soil Air Water

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Paper production is among the industrial branches generating significant amounts of waste. Organic waste from paper manufacturing is mostly used in gardening and agriculture or converted for energy purposes, while inorganic waste, including green liquor dregs (GLD), is usually deposited on landfills. GLD has a highly alkaline reaction, suggestive of its possible utilization for land reclamation or for improvement of soil's physico‐chemical properties. The research results originate from a pot experiment with maize as the test plant. GLD was added to soil in doses 10–40 t ha−1. The trials consisted of two series: with and without tree bark (TB). GLD contributed to neutralization of the soil's acidic pH, enrichment of the sorption complex with alkaline cations, and to greater salinity of the soil. In the series with TB, it is demonstrated that GLD led to a decrease in the soil content of total organic carbon; while the content of total nitrogen increased, the C:N ratio is considerably narrowed. In response to GLD, the greenness of leaves significantly improves, but this does not translate into an increase in the yield of plants. Regarding the chemical composition of plants grown in soil treated with elevated GLD doses, the content of N and Na is demonstrably higher, although no such effect is discernible in the case of P and K. For the environment, safe doses of the applied waste, not causing significant deterioration of soil properties or depressing crop yields, are 10 and 20 t GLD ha−1.

show abstract

Improving Properties of Sealing Layers Made of Till by Adding Green Liquor Dregs to Reduce Oxidation of Sulfidic Mine Waste

Cited by 18 publications

References 4 publications

Prediction of the long-term performance of green liquor dregs as a sealing layer to prevent the formation of acid mine drainage

Prediction of the long-term performance of green liquor dregs as a sealing layer to prevent the formation of acid mine drainage

Mine Drainage Generation and Control Options

Impact of Paper Mill Waste on Physicochemical Properties of Soil, Crop Yield, and Chemical Composition of Plants

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