New Perspectives about Health Risk Assessment of Soil Heavy Metal Pollution-Origin and Prospects of Probabilistic Risk Analysis
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X53

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The National Natural Science Foundation of China(General Program, Key Program, Major research Plan),Joint Research Fund for Overseas Chinese Young Scholars

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    Abstract:

    Health hazard assessment of soil heavy metal pollution is the paramount premise of soil environmental risk management. Probabilistic risk assessment (PRA) that upholds the idea of uncertainty and variability of characterization has opened up new perspectives about health risk assessment of soil heavy metal pollution. In order to strengthen the theoretical cognition of PRA and to promote in-depth application of PRA in the field of soil heavy metals exposure risk assessment, this paper systematically elaborated the theoretical basis and connotation evolution of PRA, with the aid of the bibliometric and integrating analysis methods, and compared PRA with the traditional deterministic risk assessment (DRA), with emphases on dynamics of its application and development and trends and directions of the research on PRA in future. The research indicates that being an important supplement to DRA, PRA is an integration of a set of concepts and technologies that include both variability and uncertainty into the environment risk assessment. It has broken through the limit of the traditional conservative single-point risk estimation, and is applicable to fine assessment of the risk of soil heavy metals exposure to human health. However, the current PRA framework fails to explain clearly the definition of parameter boundaries and uncertainty handling of exposure scenarios, thus leading to arguments over its accuracy, applicability and resource costs. Another challenge originates from its integration with source apportionment and biomarkers analysis of soil heavy metals and development towards a multi-media, multi-receptor and multi-scale PRA framework. It is, therefore, essential for us to unfold in-depth research on PRA from the aspects of theoretical basis, technology and practical application, so as to enhance the policy implications in drafting benchmarks and developing management systems of soil environment risks.

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YANG Shiyan, LIU Xingmei, XU Jianming. New Perspectives about Health Risk Assessment of Soil Heavy Metal Pollution-Origin and Prospects of Probabilistic Risk Analysis[J]. Acta Pedologica Sinica,2022,59(1):28-37.

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History
  • Received:September 12,2020
  • Revised:December 15,2020
  • Adopted:January 29,2021
  • Online: February 02,2021
  • Published: January 11,2022