Sources appointment and health risks of PM_(2.5)-bound trace elements in a coastal city of southeastern China  

作　　者：Ziyi Lin Xiaolong Fan Gaojie Chen Youwei Hong Mengren Li Lingling Xu Baoye Hu Chen Yang Yanting Chen Zhiqian Shao Jinsheng Chen 

机构地区：[1]Center for Excellence in Regional Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China [2]Key Lab of Urban Environment and Health,Institute of Urban Environment,Chinese Academy ofSciences,Xiamen 361021,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Minnan Normal University,Zhangzhou 363000,China

出　　处：《Journal of Environmental Sciences》2024年第4期561-571,共11页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.U22A20578);the Science and Technology Department of Fujian Province(No.2022L3025);the Center for Excellence in Regional Atmospheric Environment Project(No.E0L1B20201);the Chaozhou Science and Technology Plan Project(No.2018GY03);Xiamen Atmospheric Environment Observation and Research Station of Fujian Province;Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention(Institute of Urban Environment,Chinese Academy of Sciences)。

摘　　要：To gain a comprehensive understanding of sources and health risks of trace elements in an area of China with high population densities and low PM_(2.5)concentrations,15 trace elements(Al,K,Ca,Ti,V,Cr,Mn,Fe,Ni,Cu,Zn,As,Sn,Ba,Pb)in PM_(2.5)were monitored from December 2020 to November 2021 in a representative city,Xiamen.The concentrations of trace elements in Xiamen displayed an obvious seasonal variation and were dominated by K,Fe,Al,Ca and Zn.Based on Positive Matrix Factorization analysis,source appointment revealed that the major sources of trace elements in Xiamen were traffic,dust,biomass and firework combustion,industrial manufacture and shipping emission.According to health risk assessment combined with the source appointment results,it indicated that the average noncarcinogenic risk was below the threshold and cancer risk of four hazardous metals(Cr,Ni,As,Pb)exceeded the threshold(10^(-6)).Traffic-related source had almost half amount of contribution to the health risk induced by PM_(2.5)-bound trace elements.During the dust transport period or Spring Festival period,the health risks exceeded an acceptable threshold even an order of magnitude higher,suggesting that the serious health risks still existed in low PM_(2.5)environment at certain times.Health risk assessment reminded that the health risk reduction in PM_(2.5)at southeastern China should prioritize traffic-related hazardous trace elements and highlighted the importance of controlling vehicles emissions in the future.

关 键 词：PM_(2.5)-bound trace elements Seasonal variations Source appointment Health risks Traffic-related source 

分 类 号：X513[环境科学与工程—环境工程] X820.4