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Method for estimating formation adsorption retardation factor

A technology of retardation factor and formation, applied in the direction of measuring devices, suspension and porous material analysis, instruments, etc., to achieve the effect of good practicability and low cost

Active Publication Date: 2018-06-29
HOHAI UNIV
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Problems solved by technology

[0008] Purpose of the invention: the purpose of the present invention is to provide a method for calculating the stratum adsorption retardation factor, to solve the problem of evaluating the adsorption performance of pollutants by artificial clay layers or natural strata in the current problem of groundwater and soil pollution

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  • Method for estimating formation adsorption retardation factor
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  • Method for estimating formation adsorption retardation factor

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0051] Such as figure 2 As shown, a calculation method of formation adsorption retardation factor, which includes the following steps:

[0052] 1) According to the industry standard "Soil Engineering Test Regulations" SL237-1999, the formation soil material is sampled, and the particle size distribution is measured to obtain the characteristic particle size D 10 (μm), D 50 (μm) and D 90 (μm); D 10 (μm), D 50 (μm) and D 90(μm) means that the mass of soil particles smaller than this particle size accounts for 10%, 50% and 90% of the total soil mass. Particle size distribution can be measured by sieve analysis method, density meter method, pipette method and laser particle size analyzer test method;

[0053] 2) Measure the particle specific surface area S (m 2 / g); The determination of particle specific surface area can be selected volume...

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Abstract

The invention discloses a method for estimating a formation adsorption retardation factor, and belongs to the field of groundwater and soil pollution. The method comprises the following steps: 1) sampling a formation soil material and determining the particle size distribution thereof to obtain the characteristic particle diameters D10, D50 and D90; 2) determining the specific surface area S of aformation soil material; 3) carrying out a Batch test on the formation soil material, and obtaining an adsorption curve of typical pollutants on the soil material; 4) taking the average slope of the adsorption curve as the partition coefficient Kd of the pollutant on the soil material; 5) estimating the adsorption retardation factor Rd of the formation. The formation adsorption retardation factoris estimated by determining the characteristic particle size, the particle specific surface area and the partition coefficient of the formation material; meanwhile, the method disclosed by the invention does not require a large amount of on-site monitoring, and does not require long-time-scale indoor testing. The method has the advantages of low cost, simplicity and feasibility, rapidness and effectiveness, can be widely applied to the prediction and repair of groundwater and soil pollution, and has good practicability.

Description

technical field [0001] The invention belongs to the field of groundwater and soil pollution, and in particular relates to a method for calculating formation adsorption retardation factors. Background technique [0002] Groundwater pollution refers to the deterioration of groundwater quality due to human activities. Soil pollution is an important source of shallow groundwater pollution. Some pollutants in the soil are easy to leached or enter the groundwater with seepage, which will cause the quality of shallow groundwater to deteriorate over time and eventually lead to pollution. [0003] Groundwater and soil pollution are often closely related to the convection, dispersion, diffusion, and adsorption of pollutants in the formation. For example, landfill leachate penetrates the anti-pollution barrier to pollute groundwater, and pollutants in polluted sites diffuse underground, etc. . Compared with convection, dispersion and diffusion, in many cases, the adsorption of pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/08G01N15/088G01N15/0893G01N2015/0866
Inventor 朱伟舒实徐浩青范惜辉吴思麟杜瑞王飞龙李云全
Owner HOHAI UNIV
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