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Method and device for fast detecting content and spatial distribution of heavy metals in soil

A technology of spatial distribution and heavy metals, applied in the direction of material magnetic variables, etc., can solve the problems of inaccurate heavy metal pollution data, influence of testing personnel, destructive samples, etc., to reduce professional skills requirements, shorten the testing period, and visualize the testing results. Effect

Inactive Publication Date: 2014-07-09
CHANGZHOU CHEFF ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology

[0003] The existing traditional methods for determining the content of heavy metals in soil usually collect soil samples at the polluted site first, and then bring the soil samples back to the laboratory for corresponding pretreatment and chemical analysis. The pretreatment of samples is cumbersome and takes a long time, which is destructive to samples, and different analysis and processing methods are required for different heavy metals. The accuracy of the experiment is affected by human operation factors, and the experiment has a certain impact on the health of the testing personnel.
In addition, there is currently a lack of on-site detection technology for heavy metals in soil, and the results of on-site testing are often affected by various site conditions, and the accuracy is not high. Heavy metal pollution within the concentration range is measured, and the data measured for heavy metal pollution exceeding the concentration range is inaccurate. For example, laser-induced plasma spectroscopy is only accurate when measuring elements with a content below 300ppm

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  • Method and device for fast detecting content and spatial distribution of heavy metals in soil
  • Method and device for fast detecting content and spatial distribution of heavy metals in soil
  • Method and device for fast detecting content and spatial distribution of heavy metals in soil

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Effect test

Embodiment 1

[0026] See Table 1 and figure 1

[0027] The urban soil in Xuzhou City, Jiangsu Province was selected as the research object, and the concentration of heavy metals in urban soil was characterized by magnetic method.

[0028] (1) Measure the magnetic parameters of 27 points near Xuzhou Iron and Steel Works with a magnetic susceptibility meter, and obtain the relationship between the target heavy metal concentration and magnetic parameters as y=8.91764+0.04212*X, and extract the parameter of the heavy metal concentration formula as a=8.91764 , b=0, c=0, d=0.04212, e=0, f=0.

[0029] (2) Simultaneously determine the geographic coordinates of the site, see Table 1.

[0030] (3) Obtain the operational characterization formula for the concentration of heavy metal copper in the area to be tested (Xuzhou): copper concentration=28.91764+0.04212*X, r=0.7167, p<0.0001 to calculate the concentration of copper at each point to be tested.

[0031] (4) Using GIS system to generate visuali...

Embodiment 2

[0036] See Table 2 and figure 2

[0037] The urban soil in Xuzhou City, Jiangsu Province was selected as the research object, and the concentration of heavy metal lead in urban soil was characterized by magnetic method.

[0038] (1) Measure the magnetic parameters of 27 points near the Xuzhou Iron and Steel Works with a magnetic susceptibility meter, obtain the target heavy metal lead concentration and the magnetic parameter relational expression as y=22.5+0.062x, extract the parameter of the heavy metal lead concentration formula as a= 22.5, b=0, c=0, d=0.062, e=0, f=0.

[0039] (2) Simultaneously determine the geographic coordinates of the site, see Table 2.

[0040] (3) Obtain the operational characterization formula of heavy metal lead concentration in the area to be tested: Pb concentration=22.5+0.062x r=0.570p<0.005n=27, and calculate the concentration of lead at each point to be tested.

[0041] (4) Using GIS system to generate visualized spatial distribution map of...

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Abstract

The invention relates to a method and a device for fast detecting content and spatial distribution of heavy metals in soil. Through in-situ measurement of magnetic susceptibility and Beidou navigation system-based positioning determination of geographic coordinates and altitude, damage-free, fast and convenient determination of a heavy metal concentration of soil is realized and accuracy reaches to 1ppm, and through combination with a land use map and a regional topographic map, a heavy metal concentration spatial distribution map can be drawn. The method solves the problem that the traditional heavy metal concentration measurement method has complex processes and consumes long time, realizes fast, real-time and accurate determination of a heavy metal concentration of soil by non-professionals, does not damage a soil sample, solves the problem that different heavy metals are detected by different detection methods and realizes multiparameter measurement by only one device. The method can be used for tracking a soil pollution source and has an important meaning for controlling soil heavy metal pollution.

Description

technical field [0001] The invention relates to a method and a device for detecting the content of heavy metals in soil, in particular to a method and a device for rapidly detecting the content and spatial distribution of heavy metals in soil. Background technique [0002] Soil is one of the elements of natural geography, and it is the place where plants grow and humans live. The pollution of heavy metals in soil not only affects the properties of soil, but also affects the health of plants, animals and even humans. Once the soil is polluted by heavy metals, it is difficult to completely eliminate. Under the influence of industrial, mining, agricultural activities and urbanization process, soil heavy metals continue to accumulate, the degree of pollution is aggravated, and the harm is becoming more and more serious. At present, my country has entered a period of high incidence of environmental pollution accidents, and heavy metal pollution accidents occur from time to time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/72
Inventor 王学松邱立伟袁莉萍
Owner CHANGZHOU CHEFF ENVIRONMENTAL PROTECTION TECH
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