title: Levels and Sources of PAHs in Air-borne PM2.5of Hefei City, China.
abstract: This work studied the concentrations and sources of polycyclic aromatic hydrocarbons (PAHs) in air-borne particulate matter of Hefei, China. Samples of PM2.5were collected daily at two sites during May, 2014, and January, 2015. The average daily concentration of PM2.5was 96.88 µg m-3, which is higher than the 2012 China Ambient Air Quality Standard (GB3095-2012 24-h grade II) of 75 µg m-3. The concentrations of 16 EPA priority polycyclic aromatic hydrocarbons (PAHs) were analyzed by gas chromatography-mass spectrometry. The PM2.5-bound PAH concentrations ranged from 4.92 to 71.00 ng m-3(mean = 21.34 ng m-3), and exhibited obvious seasonal (31.38 ng m-3in winter and 14.05 ng m-3in summer) and spatial variability (27.23 ng m-3at site ME and 18.20 ng m-3at site MS). Meteorological conditions such as ambient temperature, wind speed and humidity had influences on the concentrations of PAHs. As an index for PAH carcinogenicity, the annual average concentration of benzo(a)pyrene ranged from 0.46 to 2.31 ng m-3, with a mean of 1.15 ng m-3. This mean was lower than the China Ambient Air Quality Standard (GB3095-2012) of 2.5 ng m-3. The diagnostic PAH ratios and principal component analysis (PCA) suggested that combustion of coal and vehicle emissions were the main sources of PAHs in PM2.5.
authors.affiliation: CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China.|State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi, 710075, China.
authors.forename: Ruoyu
authors.initials: R
authors.lastname: Hu
authors.affiliation: CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China. 18256078710@163.com.|State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi, 710075, China. 18256078710@163.com.
authors.forename: Guijian
authors.initials: G
authors.lastname: Liu
authors.affiliation: CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.affiliation: CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China.
authors.forename: Huaqin
authors.initials: H
authors.lastname: Xue
authors.affiliation: CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001564:Benzo(a)pyrene / Q000032:analysis; D002681:China; D002947:Cities; D004784:Environmental Monitoring; D052638:Particulate Matter / Q000032:analysis / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D025341:Principal Component Analysis; D012621:Seasons; D014887:Weather
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; D011084:Polycyclic Aromatic Hydrocarbons; D001564:Benzo(a)pyrene
keywords: Meteorology; PM2.5; Polycyclic aromatic hydrocarbons; Sources apportionment