基于多孔介质煤矸石路基汞元素的扩散规律研究

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Abstract There are many kinds of trace pollution elements, mainly mercury, in the road base of coal gangue. Based on the theory of solute transport mechanics in porous media, a mathematical model of coal gangue roadbed mercury soil atmospheric precipitation groundwater porous media was established to study the diffusion rule of mercury in coal gangue roadbed. The results show that: the pH value of coal gangue subgrade solution is related to the material composition, and has nothing to do with the external environment such as rainfall; under different pH values, the pH value of coal gangue solution has a greater impact on the release of mercury, but has little impact on the release rate of mercury. The lower the initial pH value, the higher the release of mercury; with the time of atmospheric rainfall, the mercury element in coal gangue subgrade is released to the surrounding soil mass and the effective diffusion of groundwater, in 18 years to meet the sanitary standards of drinking water, if continue to spread, will seriously affect the surrounding environment. It can provide a theoretical support and reference for the environmental assessment and treatment of coal gangue subgrade.

Key words： gangue roadbed mercury porous media diffusion law surrounding environment

Published: 01 July 2020

CLC number:

X523

Fund:This work was financially supported by the Science and Technology Project in Department of Transport of Shandong Province (2019B24).

About author:: Deqin Ran, received his master's degree in Shandong University in 2012. He is currently an engineer in Shandong Transportation Institute. His research interests are traffic environment monitoring, pollution prevention and consultation.

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	RAN Deqin
	AN Bin
	LI Yiran
	HUI Bing
	LI Yanzhao
	SONG Guangyuan
	SONG Haimin

Cite this article:

RAN Deqin,AN Bin,LI Yiran, et al. Research on the Diffusion Law of Mercury in Roadbed of Coal Gangue Based onPorous Media[J]. Materials Reports, 2020, 34(Z1): 255-257.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2020/V34/IZ1/255

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