Health-based And Ecological Risk Assessment Of Contaminated Sites

Contaminated sites exist in all of the world, and its often cause serious environmental problems. Integrated risk assessment is a combination of human health risk assessment and ecological risk assessment, which is considering the harm of human and ecology suffered. Integrated risk assessment is useful than human health risk assessment and ecological risk assessment.In this paper, the framework of integrated risk assessment based on comprehensive human health risk assessment's methods and ecological risk assessment's methods. Integrated risk assessment given the basic ideas, methods, and calculation formula. In this paper, In this paper, the research contents and results is:(1)In the problem formulation phase of Integrated risk assessment, it contain integration of available information and selecting assessment endpoints and conceptual models. In the selecting assessment endpoints phase, we provide criteria for selection.(2)In the exposure assessment phase, it contain contaminations analysis and exposure analysis and exposure calculation formulas. In the contaminations analysis, it analysis the migration path of the contaminations, and the exposure manners of human and ecological. In the exposure analysis phase, it analysis the exposure time and exposure manner.(3) In the dose-effect analysis phase, given the effect - dose curves established method, and the criteria for selection of test substances and extrapolation models;(4)In risk characterization phase, it is the culmination of the problem formulation, analysis endpoints, exposure analysis, dose-effect analysis. It given formulas of quantitative and qualitative risk characterization and risk description. Also analysis uncertainty in the problem formulation, exposure analysis, dose-effect analysis. It can help adequately characterizing variability.