title: Effects of oil pipeline explosion on ambient particulate matter and  their associated polycyclic aromatic hydrocarbons.
abstract: Effects of the oil pipeline explosion on PM(2.5)-associated polycyclic aromatic hydrocarbons (PAHs) and their substituted (alkylated, nitrated, oxygenated, hydroxyl and chlorinated) derivatives are assessed near the accident scene of Qingdao, China. Compared with those in TSP-PM(2.5), gaseous phase, burn residue and unburned crude oil, eighty-nine PAHs in PM(2.5) are identified and quantified to investigate the composition, temporal and spatial distribution, and sources. The concentrations of PM(2.5)-associated parent PAHs increase approximately seven times from the non-explosion samples to the explosion samples (mean ± standard deviation: 112 ± 2 vs 764 ± 15 ng/m(3)), while some substituted products (nitro- and oxy-) increase by two orders of magnitude (3117 ± 156 pg/m(3) vs 740 ± 37 ng/m(3)). The toxicity evaluation indicates the BaP equivalent concentrations (based on the US EPA's toxicity factors) in PM(2.5) are much higher than those in the other phases, especially for a long duration after the tragic accident.
authors.affiliation: Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao, 266100, China. yuezhao@ouc.edu.cn
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhao
authors.forename: Lixin
authors.initials: L
authors.lastname: Cao
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhou
authors.forename: Qiming
authors.initials: Q
authors.lastname: Que
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002681:China; D004784:Environmental Monitoring; D005107:Explosions; D052638:Particulate Matter / Q000032:analysis*; D059392:Petroleum Pollution; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; D011084:Polycyclic Aromatic Hydrocarbons