title: Atmospheric levels and health risk of polycyclic aromatic hydrocarbons (PAHs) bound to PM2.5 in Guangzhou, China.
abstract: The polycyclic aromatic hydrocarbons (PAHs) in PM2.5 contribute significantly to health risk. The objectives of this study were to assess the occurrence and variation in the concentrations and sources of PM2.5-bound PAHs sampled from the atmosphere of a typical southeastern Chinese city (Guangzhou) from June 2012 to May 2013, with the potential risks being investigated. The annual average concentration of PM2.5 was 64.88μgm(-3). The annual average concentration of PAHs in PM2.5 was 33.89ngm(-3). Benzo(a)pyrene (BaP) was found to be the predominant PAH in all PM2.5 samples throughout the year, constituting approximately 8.78% of the total PAH content. The significant meteorological parameters for most of the PAHs were sunshine time, air pressure, and humidity, together representing 10.7-52.4% of the variance in atmospheric PAH concentrations. Motor-vehicle exhaust and coal combustion were probably the main sources of PAHs in PM2.5 in Guangzhou. The average inhalation cancer risk (ICR) for a lifetime of 70years was 5.98×10(-4) (ranging from 8.39×10(-5) to 1.95×10(-3)).
authors.affiliation: School of Chemistry Engineering, Central South University, Changsha City, Hunan Province, China; Changsha Environmental Protection College, Changsha City, Hunan Province, China; Key Laboratory of Nonferrous Metal Resource Chemistry, Central South University, Changsha City, Hunan Province, China.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Liu
authors.affiliation: School of Chemistry Engineering, Central South University, Changsha City, Hunan Province, China; Key Laboratory of Nonferrous Metal Resource Chemistry, Central South University, Changsha City, Hunan Province, China. Electronic address: rlman@mail.csu.edu.cn.
authors.forename: Ruilin
authors.initials: R
authors.lastname: Man
authors.affiliation: South China Institute of Environmental Sciences, MEP, Guangzhou City, China. Electronic address: mashexia@scies.org.
authors.forename: Shexia
authors.initials: S
authors.lastname: Ma
authors.affiliation: Changsha Environmental Protection College, Changsha City, Hunan Province, China.
authors.forename: Juansheng
authors.initials: J
authors.lastname: Li
authors.affiliation: School of Chemistry Engineering, Central South University, Changsha City, Hunan Province, China; Key Laboratory of Nonferrous Metal Resource Chemistry, Central South University, Changsha City, Hunan Province, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wu
authors.affiliation: Changsha Environmental Protection College, Changsha City, Hunan Province, China.
authors.forename: Juanying
authors.initials: J
authors.lastname: Peng
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere; D001564:Benzo(a)pyrene / Q000032:analysis; D002681:China; D002947:Cities; D003031:Coal / Q000032:analysis; D006801:Humans; D006813:Humidity; D052638:Particulate Matter / Q000032:analysis / Q000737:chemistry; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D011634:Public Health; D018570:Risk Assessment; D012621:Seasons; D001335:Vehicle Emissions / Q000032:analysis
chemical_list: D000393:Air Pollutants; D003031:Coal; D052638:Particulate Matter; D011084:Polycyclic Aromatic Hydrocarbons; D001335:Vehicle Emissions; D001564:Benzo(a)pyrene
keywords: Health risk assessment; Meteorology effect; PAHs; PM(2.5); Source analysis