Human health risk assessment method for heavy metal contaminated soil

Abstract

The invention discloses a human health risk assessment method for heavy metal contaminated soil. The method comprises the following steps: firstly, respectively constructing functional relationships C1 (pH) and C2 (pH) between the leaching concentration and acid dissolution state concentration of heavy metals in a soil sample and the pH value of an extracting agent; then, calculating the human health risk concentration Crisk in the soil sample, enabling the Crisk to meet a formula: Crisk = 0.5*C1 (pH)+0.5*C2 (pH); then, calculating the total carcinogenic risk and / or hazard index of heavy metalin the soil sample by referring to related parameters provided in "Technical Guidelines for Soil Pollution Risk Assessment of Construction Land (HJ 25.3-2019)" and a calculation model; and finally, evaluating whether the heavy metal contaminated soil has human health risks or not by referring to (HJ 25.3-2019) evaluation standards. The method is stricter, and dynamic evaluation of the human health risk of reutilization of the heavy metal contaminated soil after remediation under different pH environmental conditions is achieved.

Description

technical field

[0001] The invention belongs to the fields of soil pollution risk management and control and human health risk assessment, and in particular relates to a human health risk assessment method for heavy metal polluted soil. Background technique

[0002] With the acceleration of my country's urbanization process and the transformation of industrial structure, a large number of people have flooded into cities, resulting in more scarce urban land resources and rising land costs. The adjustment of industrial structure directly leads to the closure or relocation of traditional enterprises with backward production capacity and old factories. According to incomplete statistics, in recent years, more than 100,000 enterprises across the country need to be closed or relocated. In the Pearl River Delta region alone, more than 2,000 polluting enterprises have been or will be relocated in recent years. Most of these enterprises are engaged in electroplating, printing and dy...

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