Calculation method for risk control value of arsenic in soil and application thereof

A technology of risk control and calculation method, applied in the field of risk assessment of contaminated sites, to achieve the effect of scientific and reasonable risk control value, avoiding excessive restoration and economic waste

Active Publication Date: 2022-03-04
北京市生态环境保护科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the risk assessment method specified in the current national and local guidelines is not valid for the calculation of the risk control value of arsenic in soil

Method used

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  • Calculation method for risk control value of arsenic in soil and application thereof
  • Calculation method for risk control value of arsenic in soil and application thereof
  • Calculation method for risk control value of arsenic in soil and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The concentration limit of arsenic in my country's existing "Drinking Water Quality Standards" (GB5749-2006) is 10 μg / L, and the concentration limit of arsenic in "Ambient Air Quality Standards" (GB 3095-2012) is 0.006 μg / m 3 . 10μg / L and 0.006μg / m respectively 3 As the exposure concentration of arsenic in drinking water and ambient air, the oral intake route of arsenic is calculated based on the parameters recommended in the first category of land use scenarios in the "Technical Guidelines for Soil Pollution Risk Assessment of Construction Land" (HJ25.3-2019) The equivalent doses of the carcinogenic effects of the skin contact route and the respiratory inhalation route are 0.0766 μg / kg / d, 0.0766 μg / kg / d, and 0.000618 μg / kg / d, respectively, and the oral intake is reversed based on the equivalent dose The soil arsenic risk control values ​​of the route, skin contact route, and inhalation route were 59.91 mg / kg, 624.42 mg / kg, and 92.66 mg / kg respectively, and the final s...

Embodiment 2

[0097] The difference from Example 1 is that based on the population exposure parameters of a certain city in the north, some human exposure parameters are determined in combination with the population exposure characteristics at that time, and the calculated equivalent doses of carcinogenic effects of arsenic through oral intake, skin contact, and respiratory inhalation They are 0.13μg / kg / d, 0.13μg / kg / d, and 0.00063μg / kg / d, respectively. Based on the equivalent dose, the risk control value of soil arsenic by oral intake, skin contact, and respiratory inhalation is reversed. They were 163.64mg / kg, 1263.05mg / kg, and 139.68mg / kg respectively, and the final soil total risk control value based on the equivalent dose was 71.11mg / kg.

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Abstract

The invention discloses a calculation method for a risk control value of arsenic in soil and application thereof. The calculation method comprises the following steps: S1, calculating equivalent doses of various approaches based on different media; s2, calculating a soil risk control value of each approach based on an equivalent dose; and S3, calculating a soil total risk control value Cs based on the equivalent dose. According to the calculation method, the basis is provided for formulating the soil remediation target value of the arsenic-contaminated site in China based on the equivalent doses of different media, and excessive remediation of the contaminated site is avoided.

Description

technical field [0001] The invention belongs to the technical field of risk assessment of contaminated sites, and in particular relates to a calculation method and application of arsenic risk control values ​​in soil based on equivalent doses of different media. Background technique [0002] Since the first introduction of risk assessment methods and concepts in 2000, the risk assessment of contaminated sites in my country has gone through nearly 20 years and accumulated a lot of application experience, but many problems have also been found in practice. [0003] Arsenic is a common pollutant in industrially polluted sites in my country, and it is also a background element in the earth's crust. The mining and smelting of arsenic and arsenic-containing metals, the production of glass, pigments, technical materials, and paper using arsenic or arsenic compounds as raw materials, and the burning of coal can all produce arsenic-containing waste water, waste gas and waste residue,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C10/00G16H50/30
CPCG16C10/00G16H50/30
Inventor 夏天翔贾晓洋
Owner 北京市生态环境保护科学研究院
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