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A Quantitative Identification Method of Heavy Metal Pollution Sources in Surface Soil Based on Enrichment Factor Value Calculation

An enrichment factor and surface soil technology, applied in soil material testing, material stimulation analysis, thermal stimulation analysis, etc., can solve the problems of affecting source identification results and reducing the contribution proportion of ultra-trace heavy metal pollution sources, etc.

Active Publication Date: 2022-01-25
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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  • A Quantitative Identification Method of Heavy Metal Pollution Sources in Surface Soil Based on Enrichment Factor Value Calculation
  • A Quantitative Identification Method of Heavy Metal Pollution Sources in Surface Soil Based on Enrichment Factor Value Calculation
  • A Quantitative Identification Method of Heavy Metal Pollution Sources in Surface Soil 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 method for quantitatively identifying sources of heavy metal pollution in surface soil based on the calculation of enrichment factor values. It collects regional surface soil and bottom background soil, and measures heavy metal content values; calculates the enrichment factor value of heavy metals in the surface soil; based on the enrichment factor Values, principal component analysis was carried out to qualitatively identify the main pollution sources of heavy metals in the surface soil; the standardized total heavy metal enrichment factor was used as the dependent variable, and the different component loads of the principal component analysis were used as independent variables to establish a multiple linear regression equation; according to The size of the coefficient of the regression equation can quantitatively identify the relative pollution contribution rate of different sources of heavy metals in the regional surface soil. The invention has the beneficial effect of accurately and effectively quantitatively identifying the relative pollution contribution rates of components from different sources.

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...

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Application Information

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