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Method for evaluating human health risks based on soil heavy metal forms

A technology for health risk assessment and human health, applied in the field of environmental pollution assessment, can solve problems such as large errors and inaccurate assessments, and achieve the effects of small assessment errors, scientific assessment, and convenient operation

Pending Publication Date: 2021-02-23
中地宝联(北京)国土资源勘查技术开发集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, the present invention provides a kind of assessment method to human health risk based on soil heavy metal form, to solve the inaccurate and large error problem of heavy metal risk assessment to human body in the prior art

Method used

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  • Method for evaluating human health risks based on soil heavy metal forms
  • Method for evaluating human health risks based on soil heavy metal forms
  • Method for evaluating human health risks based on soil heavy metal forms

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Embodiment 1, sample collection and extraction of metal occurrence form

[0058] The research area of ​​this example is located in a mining area in Hezhou, Guangxi Zhuang Autonomous Region, with a total area of ​​8.7918km 2 ; The mining area is rich in tin, tungsten, lead-zinc and iron ore resources. After decades of extensive, inefficient, disorderly mining and illegal mining of mineral resources in the later stage, a large amount of waste residue and tailings have not been effectively treated. Accumulation on the surface of the mining area has caused serious pollution to the surface soil of the mining area. The overall mining area adopts the systematic sample layout method, and the plane layout points are arranged according to 40m × 40m, and a total of 4251 sampling points are arranged; the soil samples from the surface layer 0-20cm are taken, and 5 sub-samples are taken from each sampling point, and the total weight is about 1000 grams. , Pick out debris such as gra...

Embodiment 2

[0064] Embodiment 2, the assessment of human health risk based on soil heavy metal form

[0065] This embodiment adopts the "four-step method" recommended by EPA to assess the risk of heavy metal pollutants to human health. The exposure routes include oral ingestion, skin contact and respiratory inhalation. The health risk assessment of the health risk model caused by different types of pollutants passing through the soil-human body includes a model of health hazards caused by carcinogens and a risk model of health hazards caused by non-carcinogens. On the basis of laboratory experiments, the concentration index of heavy metals is obtained, and the available content of heavy metal elements is obtained by using the proportion of heavy metals in the bioavailable state, and the health risk assessment model CDI is used for quantitative evaluation.

[0066] The CDI calculation model for each exposure route is as follows:

[0067] (1) The amount of pollutants ingested due to direc...

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Abstract

The invention discloses a method for evaluating human health risks based on soil heavy metal forms. The method comprises the following steps: collecting and processing a sample, and determining analyzed heavy metal elements; extracting a heavy metal occurrence form, and determining the content of a heavy metal bio-available state; determining the exposure concentration of the heavy metal accordingto the bio-available state content of the heavy metal; and carrying out health risk evaluation analysis according to the exposure concentration of the heavy metal. According to the method for evaluating the human health risks based on the soil heavy metal forms, the bio-availability of the heavy metal is combined with the health risk evaluation model of the heavy metal so that the uncertainty ofthe health risk model can be reduced from the perspective of reasonably estimating the exposure dose of the heavy metal. The risk evaluation method is convenient to operate, more scientific in assessment, smaller in assessment error and convenient for people to assess and prevent health risks of heavy metals in soil to human bodies.

Description

technical field [0001] The invention relates to the technical field of environmental pollution assessment, in particular to a method for assessing human health risks based on soil heavy metal forms. Background technique [0002] Heavy metal pollution sources such as industrial production discharge, sewage irrigation, and atmospheric deposition make the heavy metal content in the soil far exceed the safe value, posing a serious threat to human health. Due to the characteristics of heavy metals that are not easy to degrade and easy to enrich, people pay more and more attention to the problems caused by soil heavy metal pollution; heavy metal elements in soil are not only harmful to the environment, but also cause serious harm to human health. Therefore, Human health risk assessment of soil heavy metal elements has very important practical significance. Traditionally, the total amount is usually used in soil heavy metal risk assessment, which may lead to overestimation of huma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N1/40G01N1/28G16H50/30
CPCG01N33/24G01N1/4044G01N1/28G01N1/286G16H50/30
Inventor 李丽董桂海佟德凯李彦漫林观生申豪杰
Owner 中地宝联(北京)国土资源勘查技术开发集团有限公司
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