Abstract:

For the assessment of the impact of health risk caused by αHCH in the atmosphere,use daily concentrations of αHCH in atmospheric of 2005 which was simulated by CanMETOP to do the studies which based on inhalation factors and cancer risk.The result shows annual αHCH intake fraction has a geographical features which is eastern>western,northern>southern.The intake fractions of middleeast and northeast regions are mainly contributed by population density and αHCH concentrations in the atmosphere.The individual health loss in east and southeast are less than in northeast.The monthly distribution of intake fraction in middleeast and southeast are more equable,but in the northeast region it is mainly in summer.The coefficient of individual cancer risk in northeast region was significantly higher than the central and south.Based on the analysis above we can get a conclusion that the exposure risk which caused by other pollutants has similar temporal and spatial distribution.Besides the factors such as the wet deposition and the rise of temperature which caused by precipitation in summer of northeast region,these make feeding exposure and skin contact exposure increasing,so the compound exposure of northeast population will be significantly higher than other areas