Method for improving adsorption performance of clay through loess additive

A technology of adsorption properties and additives, which is applied in the field of improving the adsorption properties of clay with loess additives, to achieve the effect of improving adsorption properties and saving manpower and material resources

Inactive Publication Date: 2017-07-07
中国人民解放军沈阳军区司令部工程科研设计所
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] According to literature reports, loess has a high adsorption capacity for heavy metals, but there

Method used

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  • Method for improving adsorption performance of clay through loess additive

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Embodiment Construction

[0026] A method for improving the adsorption performance of clay by using loess additives, comprising the following steps:

[0027] Step 1, selecting soil material and measuring its geotechnical parameters;

[0028] Step 2, material preparation and testing;

[0029] Step 3, measuring the adsorption and permeability coefficient of the modified clay under different addition ratios;

[0030] Step 4: Select the most appropriate proportion of loess to improve the clay.

[0031] The soil materials selected in the step 1 are clay and loess obtained locally; the geotechnical parameters measured include particle gradation curve, permeability coefficient, liquid limit, plastic limit, maximum dry density, optimum water content, porosity and specific gravity.

[0032] Said step 2 material preparation comprises the following steps:

[0033] First, the soil sample is air-dried, sieved, dried, cooled to room temperature, and then stored in a plastic bag for later use;

[0034] Then, pre...

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Abstract

The invention belongs to the technical field of environmental geotechnics, and particularly relates to a method which is used for improving the adsorption performance of clay through a loess additive and effectively improving the adsorption performance of a traditional clay landfill liner. The method comprises the following steps that 1, a clay material is selected, and geotechnical engineering parameters of the clay material are determined; 2, material preparation and testing are conducted; 3, the adsorption performances and permeability coefficients of improved clay obtained in different addition proportions are determined; 4, the clay is improved by selecting the most appropriate loess addition proportion. The clay improved by the loess not only can ensure the stable structure, but also can greatly increase the pollutant removal rate; the ambient soil materials can be effectively utilized in the adopted method, and compared with a traditional improvement method, the method is more economical and more convenient to operate, and a large quantity of manpower and material resources can be saved; according to the method of adding a certain proportion of loess into the clay, the adsorption performance of the traditional clay landfill liner can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of environmental geotechnical engineering, and in particular relates to a method for improving the adsorption performance of clay by using loess additives. Background technique [0002] Municipal solid waste landfills are used more and more, and the landfill leachate contains a large amount of heavy metal pollutants and other harmful substances. Lining systems are usually constructed at the bottom of landfills to prevent contamination of groundwater by heavy metals. Pollutants such as heavy metals have extremely strong penetrating power. Even if the permeability coefficient of the landfill lining system is small, it cannot prevent the migration of these heavy metals under the action of diffusion and eventually cause pollution. Therefore, in order to prevent landfill leachate from polluting the surrounding environment under the action of diffusion, it is necessary to use materials with high adsorption capaci...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/30
CPCB01J20/12
Inventor 杨清雷龙凡于德浩杨庆张金利王李韩坦王康李霞韩天成张宣宣杨彤边玉龙赵立波
Owner 中国人民解放军沈阳军区司令部工程科研设计所
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