Diffusion ability of contaminants of coal gangue leachate in geosynthetic clay liners

DONG Xingling; DONG Shuning; ZHOU Zhenfang; WANG Qiangmin; LIU Ji

doi:10.3969/j.issn.1001-1986.2019.03.020

Volume 47 Issue 3

Jun. 2019

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COAL GEOLOGY & EXPLORATION > 2019 > 47(3): 124-129,139. > DOI: 10.3969/j.issn.1001-1986.2019.03.020

DONG Xingling, DONG Shuning, ZHOU Zhenfang, WANG Qiangmin, LIU Ji. Diffusion ability of contaminants of coal gangue leachate in geosynthetic clay liners[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(3): 124-129,139. DOI: 10.3969/j.issn.1001-1986.2019.03.020

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Diffusion ability of contaminants of coal gangue leachate in geosynthetic clay liners

1. Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China;
2. Shaanxi Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology, Xi'an 710077, China

Funds:

Tiandi Science and Technology Co. Ltd. Science and Technology Innovation Venture Capital Special Project(2018-TD-MS073)

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Received Date: August 23, 2018
Published Date: June 24, 2019

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Abstract

Abstract

To verify the feasibility of geosynthetic clay liners(GCL) as liners material for coal gangue impoundment, diffusion tests were conducted with vertical double reservoir method to determine the diffusion ability of heavy metals(Zn²⁺、Mn²⁺) and sulfate from coal gangue leachate in GCL-S(Sodium-activated bentonite), and POLLUTE V7 based on finite layer method was used to draw the fitting curve of pollutant changing with time in the diffusion device, which calculated the diffusion coefficient of contaminants in GCL. The data show that the diffusion coefficient in GCL was lower than that in compacted clay liners, so GCL could control the diffusion and migration of pollutants more effectively.
- coal gangue leachate,
- geosynthetic clay liners,
- diffusion ability,
- heavy metals,
- sulphate

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Diffusion ability of contaminants of coal gangue leachate in geosynthetic clay liners

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