Device for testing gas diffusion coefficients of GM/GCL under different contact conditions

A technology of gas diffusion and diffusion chamber, which is applied in the direction of measuring device, permeability/surface area analysis, suspension and porous material analysis, etc. It can solve the problem that the contact degree of GM/GCL and compacted clay layer cannot be quantitatively calculated, etc. Achieve the effects of convenient calculation, simple operation, and reduced research difficulty
CN111024579AInactive Publication Date: 2020-04-17SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2020-04-17
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a test instrument and method for testing gas diffusion coefficients of a horizontal barrier system of a geomembrane, a bentonite waterproof pad and a compacted clay layer underdifferent contact conditions. The instrument consists of a pressurizing part, a permeable stone, a soil sample, a porous breathable material, an air inlet, an air outlet, a valve, an air storage chamber, a geomembrane or geosynthetic liner and an oxygen sensor. According to the invention, loads with different sizes and different types of concentration conditions can be autonomously and conveniently applied to the GM / GCL and the upper end of the soil body or the size of a gap between the soil and the geomembrane is changed, thus the different contact degrees of the two can be changed. On the other hand, by calculating the gas diffusion coefficient of the sample structure, the gas diffusion coefficient indirectly corresponds to the contact mode between the GM / GCL and the soil body one to one, and therefore quantitative calculation and research are conducted on the contact mode of the GM / GCL and the soil body.
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Description

technical field

[0001] The invention relates to the field of gas diffusion coefficient measurement, and in particular discloses a test instrument and method for testing the gas diffusion coefficient of a horizontal barrier system of a geomembrane, a bentonite waterproof pad and a compacted clay layer under different contact conditions. Background technique

[0002] During the landfill treatment of municipal solid waste, landfill gas represented by methane, as a greenhouse gas, has seriously affected the natural environment. Due to the accelerated urbanization process in our country, many polluted sites left over from the relocation of industrial sites have been left in the original city limits. Statistical results show that volatile and semi-volatile organic pollutants (VOCs / SVOCs) include petroleum pollutants, organochlorine solvents, persistent organic pollutants (POPs) such as polychlorinated biphenyls, polycyclic aromatic hydrocarbons, organochlorine pesticides, etc. It ...

Claims

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