10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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Individual Exposure of PM2.5 and Health Risk Assessment of Heavy Metals in Nanchong Traffic Police
GUO JIALING, Li Youping, China West Normal University, Nanchong, Sichuan
Abstract Number: 659 Working Group: Air Quality in Megacities: from Sources to Control
Abstract In order to explore the situation of PM2.5 accepted by traffic police in Nanchong and the potential risk of heavy metal elements in PM2.5 by breathing into human body. On July 12,2013~July 21,we carried out on-site online monitoring of individual exposure of traffic police in Nanchong, and we also collected PM2.5 samples from air by using filter membrane. Then, we analyzed the composition of heavy metals in PM2.5 which had been collected . Finally, we made the health risk assessment according to the analytic result. The result showed that the average individual exposure concentration of PM2.5 accepted by traffic police in Nanchong during the monitoring period was 74.8μg/m3 which was slightly lower than the national secondary standard daily average concentration of 75μg/m3. The correlation analysis showed that the wind speed had a negative correlation with the exposure concentration of PM2.5 ,as well as, the correlation of temperature, relative humidity and other meteorological parameters to the exposure concentration of PM2.5 was poor. The order of the concentrations of heavy metals in PM2.5 in Nanchong city was: Fe> Zn> Mn> Pb> Sb> Ni> Cu > Cr> Co> V. The study found that Mn had a serious non carcinogenic risk to traffic police in Nanchong which with a non-carcinogenic risk index of 2.48. While the Cr had a high risk of carcinogenesis in Nanchong and should pay attention to it.