Surface soil heavy metal pollution source quantitative identification method based on enrichment factor value calculation

A technology of surface soil and enrichment factor, which is applied in soil material testing, thermal excitation analysis, material inspection products, etc., can solve problems such as affecting the identification results of sources and reducing the contribution of ultra-trace heavy metal pollution sources.

Active Publication Date: 2019-06-18
LINYI UNIVERSITY
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Problems solved by technology

The content of different heavy metals in the surface soil will vary greatly, and this difference will inevitably affect the source identification results of statistical analysis, especially the contribution of some ultra-trace heavy metal pollution sources will be significantly reduced

Method used

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  • Surface soil heavy metal pollution source quantitative identification method based on enrichment factor value calculation
  • Surface soil heavy metal pollution source quantitative identification method based on enrichment factor value calculation
  • Surface soil heavy metal pollution source quantitative identification method based on enrichment factor value calculation

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Embodiment Construction

[0014] The present invention will be described in detail below in combination with specific embodiments.

[0015] This embodiment selects a typical agricultural area in northern my country as an example, such as figure 1 The steps shown are as follows:

[0016] step one:

[0017] Based on the grid distribution method, a total of 18 sampling points were arranged in the whole area, and soil samples were collected at two depth layers of 0-20cm and 120-150cm respectively. All samples were taken back to the laboratory to air dry naturally, ground and sieved, and passed through HNO 3 –HF–HClO 4 After digestion by method, the content of heavy metals was determined by inductively coupled plasma emission spectrometer. Taking five heavy metals, Pb, Cd, Cu, Cr, and Al as examples, the content determination results of each heavy metal in the surface (0-20cm) and bottom layer (120-150cm) soil at different sampling points are shown in Table 1. As far as trace heavy metals are concerned...

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Abstract

The invention discloses a surface soil heavy metal pollution source quantitative identification method based on enrichment factor value calculation. The method is characterized by collecting area surface soil and bottom background soil, and measuring a heavy metal content value; calculating an enrichment factor value of surface soil heavy metal; carrying out principal component analysis based on the enrichment factor value and qualitatively identifying a main pollution source of the surface soil heavy metal; taking a standardized total heavy metal enrichment factor value as a dependent variable, and taking different component loads of principal component analysis as an independent variable to establish a multiple linear regression equation; and according to a coefficient of a regression equation, quantitatively identifying relative pollution contribution rates of different source components of the area surface soil heavy metal. The relative pollution contribution rates of the differentsource components are accurately, effectively and quantitatively identified.

Description

technical field [0001] The invention belongs to the technical field of prevention and control of soil heavy metal pollution, and relates to a method for quantitatively identifying sources of heavy metal pollution in surface soil based on calculation of enrichment factor values. Background technique [0002] With the continuous improvement of the level of human resource demand and the increasing production intensity, a large number of heavy metal pollutants enter the soil environment on which human beings rely for survival and development through various channels, especially toxic heavy metals such as Pb and Cd have long been harmful ecological security and human health. Soil heavy metal pollution has become a hot environmental issue of worldwide concern. On the basis of clarifying the status quo of heavy metal pollution in surface soil, further developing source identification technology to accurately quantify the contribution ratio of different pollution sources has import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N33/24
Inventor 焦伟李宝赵敏姜永见
Owner LINYI UNIVERSITY
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