Health risk assessment of inhalation exposure to metallic elements in PM2.5 in four cities of the Pearl River Delta in 2022

• Published in: Shanghai Yufang Yixue Vol. 36; no. 4; pp. 393 - 398
• Main Authors: NIU Jiwei, HUANG Suli, LI Xiaoheng, ZHANG Zhen, JI Jiajia, LIU Ning
• Format: Journal Article
• Language: Chinese
• Published: Shanghai Preventive Medicine Association 01.04.2024
• Subjects: air pollution; health risk assessment; inhalation; metal; pm2.5
• DOI: 10.19428/j.cnki.sjpm.2024.23509
• ISSN: 1004-9231

ObjectiveTo understand the characteristics of PM2.5 pollution in the air of Pearl River Delta city in Guangdong Province under the COVID-19 epidemic and the health risks of inhaling elements in PM2.5.MethodsIn 2022， 10 PM2.5 monitoring points were set up in 10 districts in Guangzhou， Shenzhen， Foshan and Zhuhai， and air samples were collected for 7 consecutive days every month to analyze the concentration of PM2.5 and the 12 elements in PM2.5. The classic "four-step" method was used to evaluate the carcinogenic risk and chronic non-carcinogenic risk of the elements in air PM2.5 on health. The age-sensitive characteristics of metal elements were combined in the carcinogenic risk assessment， and age-sensitive factors were introduced to analyze the impact of air pollution on population health.ResultsA total of 818 samples were collected. and the average annual PM2.5 concentration in the four cities of the Pearl River Delta was 30.17 （1.00-166.00， s=21.06） μg·m-3， which was lower than the concentration limit of t