Risk evaluation method for petroleum hydrocarbons in industrial polluted site soil and underground water

Abstract

The invention provides a risk evaluation method for petroleum hydrocarbons in industrial polluted site soil and underground water. The risk evaluation method comprises the following steps: step 1, collecting soil and underground water samples of a suspected polluted land parcel; 2, respectively carrying out pretreatment on the soil and underground water samples, and analyzing petroleum hydrocarboncomposition and reference content in the samples; 3, according to the purpose of the suspected polluted land parcel, determining the main use crowd of the suspected polluted land parcel and the exposure path of the petroleum hydrocarbons in contact with the crowd, wherein the exposure path is the process that the petroleum hydrocarbons pollutant in soil and underground water migrate to reach andenter a sensitive receptor; 4, performing toxicity evaluation according to the types of the petroleum hydrocarbon components; and step 5, according to the detection data of the petroleum hydrocarbons,calculating the non-carcinogenic hazard quotient of the petroleum hydrocarbon pollutants, carrying out risk characterization, and judging whether the risk is acceptable or not. By analyzing the composition and the content of the petroleum hydrocarbons, the treatment and restoration range is accurate, the pollutant type is accurate, the economic investment is reduced, and the environmental management cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental risk assessment, and in particular relates to a method for assessing the health risk of petroleum hydrocarbons in industrial polluted site soil and underground water. Background technique [0002] Under the scenario of high-intensity long-term economic development and high iteration of industry renewal in my country, a large number of polluted sites have been formed, involving petrochemical, smelting, metal manufacturing, coking and other industries, among which petroleum hydrocarbon polluted sites have become one of the important types of polluted sites at home and abroad . Petroleum is mainly composed of inorganic elements such as carbon, hydrogen, sulfur, nitrogen, and oxygen. ) complex mixture. Hydrocarbons are an important component, and may also contain toxic and volatile benzene series, which have high photochemical reactivity, and are resistant to photooxidants in the atmosphere (su...

AI Technical Summary

Problems solved by technology

However, petroleum hydrocarbons are a complex mixture. According to the production and discharge characteristics of different sites, the types and compositions of petroleum hydrocarbon pollutants vary greatly, and there are great differences in migration, degradation, transformation and toxicological characteristics.

Although the country currently has a policy on petroleum hydrocarbons (C 10 -C 40 ) to specify the soil screening value and control value, but in the investigation and risk assessment of soil environmental pollution, only soil petroleum hydrocarbons (C 6 -C 9 ) and petroleum hydrocarbons (C 10 -C 40 ) content is difficult to accurately assess its environmental toxicity, and it is difficult to scientifically and quantitatively reflect the degree of health risk of soil pollution

On the other hand, there is currently no risk assessment method for such pollutants in groundwater

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