title: Characteristics of nano-/ultrafine particle-bound PAHs in ambient air at an international airport.
abstract: Concentrations of 22 polycyclic aromatic hydrocarbons (PAHs) were estimated for individual particle-size distributions at the airport apron of the Taipei International Airport, Taiwan, on 48 days in July, September, October, and December of 2011. In total, 672 integrated air samples were collected using a micro-orifice uniform deposition impactor (MOUDI) and a nano-MOUDI. Particle-bound PAHs (P-PAHs) were analyzed by gas chromatography with mass selective detector (GC/MSD). The five most abundant species of P-PAHs on all sampling days were naphthalene (NaP), phenanthrene (PA), fluoranthene (FL), acenaphthene (AcP), and pyrene (Pyr). Total P-PAHs concentrations were 152.21, 184.83, and 188.94 ng/m(3) in summer, autumn, and winter, respectively. On average, the most abundant fractions of benzo[a]pyrene equivalent concentration (BaPeq) in different molecular weights were high-weight PAHs (79.29 %), followed by medium-weight PAHs (11.57 %) and low-weight PAHs (9.14 %). The mean BaPeq concentrations were 1.25 and 0.94 (ng/m(3)) in ultrafine particles (<0.1 μm) and nano-particles (<0.032 μm), respectively. The percentages of total BaPeq in nano- and ultrafine particulate size ranges were 52.4 % and 70.15 %, respectively.
authors: Department of Safety Health and Environmental Engineering, Central Taiwan University of Science and Technology, Taichung, Taiwan, Republic of China. chlai2@ctust.edu.tw
authors: Chia-Hsiang
authors: CH
authors: Lai
authors: Kuen-Yuan
authors: KY
authors: Chuang
authors: Jin-Wei
authors: JW
authors: Chang
mesh_terms: D000073:Acenaphthenes / Q000032:analysis / Q000737:chemistry; D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D059028:Airports; D005449:Fluorenes / Q000032:analysis / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D053758:Nanoparticles / Q000737:chemistry; D009281:Naphthalenes / Q000032:analysis / Q000737:chemistry; D052638:Particulate Matter / Q000032:analysis / Q000737:chemistry; D010616:Phenanthrenes / Q000032:analysis / Q000737:chemistry; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000737:chemistry; D011721:Pyrenes / Q000032:analysis / Q000737:chemistry; D013624:Taiwan
chemical_list: D000073:Acenaphthenes; D000393:Air Pollutants; D005449:Fluorenes; D009281:Naphthalenes; D052638:Particulate Matter; D010616:Phenanthrenes; D011084:Polycyclic Aromatic Hydrocarbons; D011721:Pyrenes; C007738:fluoranthene; C031181:phenanthrene; C030984:pyrene; C042552:acenaphthene