Population Exposure Risk Assessment of Black Carbon and PM2.5 in China
Using nationwide(except Hong Kong,Macao and Taiwan)PM2.5(2015-2020)and black carbon(2015-2017)concentra-tion monitoring data,which is combined with population distribution data,this study measured the population-weighted concentra-tion(PWC)of air pollutants in Chinese population,and assessed the risk and characteristics of population air pollution exposure qualitatively and quantitatively.The results are showed as follows:(1)From 2015 to 2020,the average exposure rate of PM2.5 in Chi-na was 48％,and Yunnan,Hainan,Guangdong,Xizang met all standards during the period;(2)From 2015 to 2017,the spatial dis-tribution of average exposure concentration of black carbon in Chinese population was unbalanced,showing a situation of low con-centration in the west and high concentration in the east.The regions with serious black carbon pollution were mainly Central Chi-na(Hunan,Henan,Jiangxi)and Southwest China(Sichuan,Chongqing);(3)From 2015 to 2017,the average annual exposure con-centration ratio of black carbon and PM2.5 in Chinese population ranged from 0.01 to 0.16,and the ratio showed a decreasing trend year by year.This study provides a reference for understanding the environmental health effects of PM2.5 and black carbon in China,and also provides a scientific basis for formulating preventive measures and policies.
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