title: Atmospheric concentrations, sources and gas-particle partitioning of PAHs in Beijing after the 29th Olympic Games.
abstract: A comprehensive sampling campaign was carried out to study atmospheric concentration of polycyclic aromatic hydrocarbons (PAHs) in Beijing and to evaluate the effectiveness of source control strategies in reducing PAHs pollution after the 29th Olympic Games. The sub-cooled liquid vapor pressure (logP(L)(o))-based model and octanol-air partition coefficient (K(oa))-based model were applied based on each seasonal dateset. Regression analysis among log K(P), logP(L)(o) and log K(oa) exhibited high significant correlations for four seasons. Source factors were identified by principle component analysis and contributions were further estimated by multiple linear regression. Pyrogenic sources and coke oven emission were identified as major sources for both the non-heating and heating seasons. As compared with literatures, the mean PAH concentrations before and after the 29th Olympic Games were reduced by more than 60%, indicating that the source control measures were effective for reducing PAHs pollution in Beijing.
authors.affiliation: International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Wan-Li
authors.initials: WL
authors.lastname: Ma
authors.forename: De-Zhi
authors.initials: DZ
authors.lastname: Sun
authors.forename: Wei-Guo
authors.initials: WG
authors.lastname: Shen
authors.forename: Meng
authors.initials: M
authors.lastname: Yang
authors.forename: Hong
authors.initials: H
authors.lastname: Qi
authors.forename: Li-Yan
authors.initials: LY
authors.lastname: Liu
authors.forename: Ji-Min
authors.initials: JM
authors.lastname: Shen
authors.forename: Yi-Fan
authors.initials: YF
authors.lastname: Li
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002681:China; D004784:Environmental Monitoring; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012621:Seasons
chemical_list: D000393:Air Pollutants; D011084:Polycyclic Aromatic Hydrocarbons