Method for calculating health risk exposure of residents around irregular landfill

Abstract

The invention discloses a method for calculating health risk exposure of residents around an irregular landfill. The method comprises the following steps: carrying out carcinogenicity and non-carcinogenicity classification on pollutants in the landfill; land types in the landfill are divided, and population gathering areas within the range of 1 km away from the boundary of the landfill are identified; according to the land use type division condition and the actual life and production condition of surrounding residents, constructing an exposure scene; analyzing the exposure scenes one by one to obtain exposure behavior parameters of surrounding residents and resident exposure characteristic parameters; and constructing an exposure conceptual model of a corresponding receptor population under a specific exposure scene, and calculating a corresponding carcinogenic risk exposure amount and a corresponding non-carcinogenic hazard exposure amount. The method has the advantages that a specific human health risk assessment system is constructed according to the landfill environment survey result based on the historical and current use conditions of the irregular landfill, the exposure level of the landfill behavior to the surrounding public is quantified, and data support is provided for human health risk assessment.

Description

technical field [0001] The invention belongs to the technical field of human health risk assessment, and in particular relates to a method for calculating the health risk exposure of residents around informal landfills. Background technique [0002] According to the analysis of the inspection results of the Ministry of Construction on the operation of landfills in many cities across the country, a considerable number of areas are still using informal landfills, and there are more than 3,000 unregulated informal landfills in the country. It is even more impossible to estimate the number of sites that have been illegally landfilled in the past. [0003] With the development of environmental protection supervision and the frequent occurrence of soil pollution in recent years, more and more informal landfill incidents have been exposed. As one of the main sources of soil pollution, informal landfills have serious impact on the surrounding residents or related personnel. Cause s...

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Problems solved by technology

[0004] On the one hand, due to the lack or weak awareness of environmental protection in the past, the construction of isolation and anti-seepage facilities in the historical informal landfill site was not carried out; It is very complicated, and the source is equally difficult to find out. After several years or even decades of migration and transformation, the soil, groundwater, surface water and other environments in adjacent areas have been seriously polluted

[0005] Currently, the technical guidelines or specifications for risk assessment published in China are only applicable to construction sites. When assessing sensitive receptors, it is assumed that the site has not been treated, and the pollutants in the soil and groundwater in the plot will be exposed to follow-up work or potential people living in the site. Risk, when calculating the receptor exposure, the parameters are mostly recommended values ​​in the technical guidelines issued by the country (national census data), but this is not suitable for evaluating the impact of sudden environmental accidents or informal landfills on the surrounding residents. Long-term health hazard level during the process

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