Soil heavy metal hierarchy health risk assessment method based on land utilization mode

Abstract

The invention discloses a soil heavy metal hierarchy health risk assessment method based on land utilization mode. The hierarchy health risk assessment method comprises the following steps: arranging sampling points on a land utilization situation map, and acquiring the total content and the chemical form composition of heavy metal elements in appointed soil; calculating the contents of bio-available heavy metals, potential bio-available heavy metals and non-bioavailable heavy metals in soil; calculating the amounts of an orally-taken soil non-carcinogenic demasking reagent, a skin-taken soil non-carcinogenic demasking reagent and an breathing-taken soil particle non-carcinogenic demasking reagent; calculating the non-carcinogenic risk factors of the bio-available contents and the potential bio-available contents in soil; drawing a non-carcinogenic risk factor map of bio-available and potential bioavailable contents in soil, and performing hierarchy division to generate a soil heavy metal hierarchy health risk map. The soil heavy metal hierarchy health risk assessment method can provide scientific references for soil health risk management decision making.

Description

technical field [0001] The invention relates to the technical fields of environmental health risk assessment and management, soil science, 3S technology application, etc., and specifically relates to a soil heavy metal level health risk assessment method based on land use mode. Background technique [0002] "National Environmental Protection Twelfth Five-Year Plan for Environmental and Health Work" and "National Environmental and Health Action Plan (2007-2015)" both pointed out that "with the rapid development of my country's industrialization and urbanization, environmental pollution affects people's health and The issue of safety has become prominent, and protecting the environment and ensuring health have become the most urgent needs of the people.” Heavy metals in urban soil may cause short-term health hazards or long-term risks to urban residents through direct or indirect exposure routes such as soil ingestion, skin contact, and inhalation. Under the background that my...

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Problems solved by technology

In recent years, many scholars have conducted environmental health risk assessments on toxic chemicals in environmental media such as soil, dust, and surface water in different cities and towns around the world, and given corresponding environmental risk management suggestions. The author also participated in the Environmental Health The actual project of risk assessment, comprehensive literature research and practical experience shows that the current urban soil environmental health risk assessment methods and systems still have the following important deficiencies: (1) Firstly, the commonly used classical health risk assessment models lack the chemical occurrence of heavy metals in soil However, the chemical occurrence form is closely related to the bioavailability and mobility of heavy metals in soil. This deficiency is likely to be an important source of model uncertainty in the evaluation; (2) Exposure risk assessment models are often due to the lack of field The settings are too conservative based on receptor exposure information. Although the purpose of strict risk management can be achieved, the high investment is obviously not proportional to the effect, leading to a greater possibility of excessive and inefficient management; (3) most environmental health risk assessment studies In practice, the impact of a principled issue is often overlooked, that is, "without receptor exposure, there is no health risk", so that the results of health risk assessment have lost practical significance and can only mislead decision makers; (4) the present study In practice, the regional risk management strategy formulated based on the results of health risk assessment is relatively single and less feasible, and cannot meet the requirements of efficient environmental risk management under the consideration of cost-benefit, and the possibility of over-management is very high, which obviously also reduces The reference value of the evaluation conclusions in relevant domestic and foreign decision-making cannot meet the social and economic real needs of developing countries like China.

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