Estimation of gaseous polycyclic aromatic hydrocarbons(PAHs)and characteristics of atmospheric PAHs at a traffic site in Kanazawa,Japan  

作　　者：Xuan Zhang Hao Zhang YanWang Pengchu Bai Lulu Zhang Akira Toriba Seiya Nagao Nobuo Suzuki Masato Honda Zhijun Wu Chong Han Min Hu Ning Tang 

机构地区：[1]Graduate School of Medical Sciences,Kanazawa University,Kanazawa 920-1192,Japan [2]School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan 430068,China [3]Institute of Nature and Environmental Technology,Kanazawa University,Kanazawa 920-1192,Japan [4]Graduate School of Biomedical Sciences,Nagasaki University,Nagasaki 852-8521,Japan [5]College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China [6]School of Metallurgy,Northeastern University,Shenyang 110819,China [7]Institute of Medical,Pharmaceutical and Health Science,Kanazawa University,Kanazawa 920-1192,Japan

出　　处：《Journal of Environmental Sciences》2025年第3期57-67,共11页环境科学学报(英文版)

基　　金：supported by the Bilateral Open Partnership Joint Research Projects of the Japan Society for the Promotion of Science,Japan(No.JPJSBP120219914);the CHOZEN Project of Kanazawa University,Japan(2019);the Cooperative Research Programs of Institute of Nature and Environmental Technology,Kanazawa University,Japan(22002,22013,22007)。

摘　　要：Size-fractionated particulate matter(PM_(2.5)and PM>_(2.5))was collected at a traffic site in Kanazawa,Japan in a seasonal sampling work in 2020.Nine polycyclic aromatic hydrocarbons(4-to 6-ring PAHs)were determined in fine and coarse particles.The gas/particle partitioning coefficients(K_(p))of the PAHs were calculated from the supercooled liquid vapour pressure and octanol-air partitioning coefficient based on the relationships obtained in previous traffic pollution-related studies.Gaseous PAHs were estimated by K_(p) and the concentrations of PM and particulate PAHs.The concentrations of total PAHs were 32.5,320.1 and 5646.2 pg/m^(3) in the PM>_(2.5),PM_(2.5) and gas phases,respectively.Significant seasonal trends in PAHs were observed(particle phase:lowest in summer,gas phase:lowest in spring,particle and gas phase:lowest in spring).Compared to 2019,the total PAH concentrations(in particles)decreased in 2020,especially in spring and summer,which might be due to reduced traffic trips during the COVID-19 outbreak.The incremental lifetime cancer risk(ILCR)calculated from the toxic equivalent concentrations relative to benzo[a]pyrene(BaP_(eq))was lower than the acceptable limit issued by the US Environmental Protection Agency,indicating a low cancer risk in long-term exposure to current PAH levels.It is notable that gaseous PAHs considerably contributed to BaP_(eq) and ILCR(over 50%),which highlighted the significance of gaseous PAH monitoring for public health protection.This low-cost estimation method for gaseous PAHs can be expected to reliably and conveniently obtain PAH concentrations as a surrogate for traditional sampling in the future work.

关 键 词：Polycyclic aromatic hydrocarbons Gas-particle partitioning TRAFFIC Exposure-response relationship COVID-19 

分 类 号：X513[环境科学与工程—环境工程]