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Method for judging pollution level of heavy metal polluted site by applying change rate of electrical resistivity

A pollution degree, resistivity technology, applied in the direction of material resistance, etc., can solve the problem of less research on related relationships, and achieve the effect of saving time and cost

Inactive Publication Date: 2015-12-23
SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some existing resistivity methods have some research on judging the scope of pollution in soil, but there are few studies on the correlation between resistivity and pollutant concentration, and the research on realizing the quantification of pollution degree by resistivity method needs to be further deepened

Method used

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  • Method for judging pollution level of heavy metal polluted site by applying change rate of electrical resistivity
  • Method for judging pollution level of heavy metal polluted site by applying change rate of electrical resistivity
  • Method for judging pollution level of heavy metal polluted site by applying change rate of electrical resistivity

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Embodiment 1

[0020] Embodiment 1: as figure 1 As shown, this embodiment specifically relates to a method for judging the pollution degree of heavy metal-contaminated sites by using the rate of change of resistivity. Since the resistivity method has an obvious response to the measurement of heavy metal-contaminated soil, the heavy metal concentration and resistivity value under the same conditions can be achieved. Quantification, so the degree of soil pollution by heavy metals can be judged by the change rate of resistivity, which specifically includes the following steps:

[0021] (1) Summarize the data and on-site exploration of heavy metal-contaminated sites, preliminarily determine the potential polluted areas in the site, and select an unpolluted area near the heavy metal-contaminated site;

[0022] (2) Measure the resistivity of the soil at different depths in the uncontaminated area. The resistivity test results are as follows: image 3 , then take the average value of the resistivi...

Embodiment 2

[0035] Embodiment 2: as figure 1 As shown, this embodiment specifically relates to a method for judging the pollution degree of a heavy metal-contaminated site by using the resistivity change rate, which specifically includes the following steps:

[0036] (1) Using the indoor test method, select representative soil samples and measure their natural state resistivity;

[0037] (2) Select Cu 2+ For representative heavy metal pollutants, copper chloride solution was used to prepare uncontaminated soil samples, soil samples with standard values, 1 times exceeding the standard, 2 times exceeding the standard, 6 times exceeding the standard, and 10 times, 50 times the contaminated soil samples, such as Figure 5 shown;

[0038] The preparation method is: take 500g of sieved uncontaminated soil each time, prepare a solution containing heavy metal ions according to the moisture content of 30±2% and the set concentration gradient, pour it into the soil sample, stir evenly, put it in...

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Abstract

The invention discloses a method for judging a pollution level of a heavy metal polluted site by applying change rate of electrical resistivity. The method comprises the following steps: (1) measuring the electrical resistivity of a soil body of an unpolluted area of the site; (2) measuring the electrical resistivity of a soil body of a potential heavy metal polluted area of the site; (3) calculating the change rate of the electrical resistivity of the soil body of the polluted area relative to the soil body of the unpolluted area; (4) judging the heavy metal pollution level of the site according to the change rate of the electrical resistivity. The method disclosed by the invention has the advantages that quantification of heavy metal concentration and electrical resistivity values under the same condition is realized; the heavy metal pollution level of the soil body can be judged according to the change rate of the electrical resistivity; the method is in favor of rapid diagnosis on the heavy metal polluted site; a basis is provided for follow-up survey and management, and time and cost are greatly saved.

Description

technical field [0001] The invention belongs to the technical field of environmental geotechnical engineering, and in particular relates to a method for judging the pollution degree of a heavy metal polluted site by using the resistivity change rate. Background technique [0002] The problem of land pollution in my country is becoming more and more serious, especially with the adjustment of industrial structure and the acceleration of urbanization in recent years, a large number of industrial enterprises have left behind many polluted sites that may cause harm to human health. If they are redeveloped and utilized, it is necessary to These sites carry out necessary surveys or repairs. Understanding the spatial distribution and concentration of pollutants is a prerequisite for the treatment and remediation of contaminated sites. Compared with the traditional on-site drilling sampling and laboratory chemical analysis, the contaminated site can be monitored. Compared with it, th...

Claims

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Application Information

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IPC IPC(8): G01N27/04
Inventor 许丽萍辛伟李韬王蓉叶萌沈婷婷
Owner SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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