Multi-microenvironment exposed PM2.5 heavy metal health risk evaluation method

Abstract

The invention belongs to the field of environment health risk evaluation, and discloses a multi-microenvironment exposed PM2.5 heavy metal health risk evaluation method. The method comprises the following steps of 1, performing dynamic monitoring and sampling at a human body breathing height; 2, analyzing heavy metal concentration and chemical form composition thereof; 3, calculating heavy metal biological effectiveness; 4, calculating an average exposure breathing dosage; 5, calculating a risk value, by means of a dosage-reaction coefficient, calculating the harm quotient and the carcinogenesis risk value of the heavy metal element corresponding to an evaluated exposure group; and 6, performing risk evaluation according to a health standard critical value. The multi-microenvironment exposed PM2.5 heavy metal health risk evaluation method realizes high information integrity, high method rationality and high result accuracy of a heavy metal health risk evaluation model.

Description

technical field [0001] The invention belongs to the fields of environmental health risk assessment, environmental sanitation and health science, and environmental management, and specifically relates to a health risk assessment method for PM2.5 heavy metals exposed to various microenvironments. Background technique [0002] Studies have confirmed that the intake of fine particulate matter represented by PM2.5 can lead to various diseases such as cardiovascular disease, respiratory infection, lung failure and cancer, and it will also reduce the weight of newborns and increase the rate of fetal malformation; as early as In 2013, the World Health Organization listed PM2.5 as a primary carcinogen. [0003] The harmfulness of PM2.5 is closely related to its heavy metal composition. Because it is difficult to degrade and has bioaccumulation, it causes extremely strong health hazards to various organs: for example, Cr, Ni, Cd, and As have been identified as carcinogenic by the US E...

AI Technical Summary

Problems solved by technology

[0007] The above health risk methods of heavy metals in atmospheric PM2.5 have the following shortcomings: (1) The original method is based on the total amount of heavy metals, and lacks consideration of the chemical form of heavy metals in PM2.5

Therefore, using the total amount of heavy metals in PM2.5 as the source of evaluation data cannot accurately reflect the potential harm and activity of heavy metals to human health.

(2) The original method is based on atmospheric background concentration, lacking data information of different exposure microenvironments

In the existing literature on health risk assessment, the concentration of heavy metals in the local atmospheric background is taken, and the sampling points are generally located in campuses or open green spaces far away from pollution sources, which do not reflect the actual differences between various exposure microenvironments and atmospheric background environments nature, causing the evaluation results to be too conservative

(3) The original method is based on the general breathing rate of adults or children, ignoring the different types of activities of the crowd in different microenvironments and the allocation time in various microenvironments

[0008] In the existing technology, the differences in the types of activities of exposed groups are not reflected, especially the differences with special groups exposed to particulate matter pollution such as road cycling commuting, material processing workshop labor, etc.

A single sampling point is used, and it is far away from traffic pollution sources, which cannot reflect the actual exposure of the human body

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