Multimedia health risk assessment:A case study of scenario-uncertainty  

作　　者：李飞 黄瑾辉 曾光明 袁兴中 梁婕 王晓钰 

机构地区：[1]College of Environmental Science and Engineering,Hunan University [2]Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education(Hunan University)

出　　处：《Journal of Central South University》2012年第10期2901-2909,共9页中南大学学报（英文版）

基　　金：Projects(50978088,51039001,51178172,51009063) supported by the National Natural Science Foundation of China;Project(NCET-08- 180) supported by the Program for New Century Excellent Talents in University from the Ministry of Education of China

摘　　要：Assisted by framework of multimedia total exposure model for hazard waste sites(CalTOX),potential influences of scenario-uncertainty on multimedia health risk assessment(MHRA) and decision-making were quantitatively analyzed in a primary extent under the Chinese scenario case by deliberately varying the two key scenario-elements,namely conceptual exposure pathways combination and aim receptor cohorts choice.Results show that the independent change of one exposure pathway or receptor cohort could lead variation of MHRA results in the range of 3.6×10-6-1.4×10-5 or 6.7×10-6-2.3×10-5.And randomly simultaneous change of those two elements could lead variation of MHRA results at the range of 7.7×10-8-2.3×10-5.On the basis of the corresponding sensitivity analysis,pathways which made a valid contribution to the final modeling risk value occupied only 16.7% of all considered pathways.Afterwards,comparative analysis between influence of parameter-uncertainty and influence of scenario-uncertainty was made.In consideration of interrelationship among all types of uncertainties and financial reasonability during MHRA procedures,the integrated method how to optimize the entire procedures of MHRA was presented innovatively based on sensitivity analysis,scenario-discussion and nest Monte Carlo simulation or fuzzy mathematics.Assisted by framework of multimedia total exposure model for hazard waste sites （CalTOX）, potential influences of scenario-uncertainty on multimedia health risk assessment （MHRA） and decision-making were quantitatively analyzed in a primary extent under the Chinese scenario case by deliberately varying the two key scenario-elements, namely conceptual exposure pathways combination and aim receptor cohorts choice. Results show that the independent change of one exposure pathway or receptor cohort could lead variation of MHRA results in the range of 3.6× 10^-6-1.4× 10^-5 or 6.7× 10^-6-2.3×10^-5. And randomly simultaneous change of those two elements could lead variation of MHRA results at the range of 7.7× 10^-8-2.3× 10^-5. On the basis of the corresponding sensitivity analysis, pathways which made a valid contribution to the final modeling risk value occupied only 16.7% of all considered pathways. Afterwards, comparative analysis between influence of parameter-uncertainty and influence of scenario-uncertainty was made. In consideration of interrelationship among all types of uncertainties and financial reasonability during MHRA procedures, the integrated method how to optimize the entire procedures of MHRA was presented innovatively based on sensitivity analysis, scenario-discussion and nest Monte Carlo simulation or fuzzy mathematics.

关 键 词：scenario-uncertainty multimedia health risk assessment （MHRA） comparative analysis parameter-uncertainty 

分 类 号：X820.4[环境科学与工程—环境工程]