Source identification of PM2.5 particles measured in Gwangju, Korea

摘要: Abstract The UNMIX and Chemical Mass Balance (CMB) receptor models were used to investigate sources of PM 2.5 aerosols measured between March 2001 February 2002 in Gwangju, Korea. Measurements particles for the analysis carbonaceous species (organic (OC) elemental carbon (EC)) using thermal manganese dioxide oxidation (TMO) method, investigation seven ionic ion chromatography (IC), twenty-four metal Inductively Coupled Plasma (ICP)-Atomic Emission Spectrometry (AES)/ICP-Mass (MS). According annual average source apportionment results obtained from CMB calculations, diesel vehicle exhaust was major contributor, accounting 33.4% mass (21.5 μg m − 3 ), followed by secondary sulfate (14.6%), meat cooking (11.7%), organic (8.9%), nitrate (7.6%), urban dust (5.5%), Asian (4.4%), biomass burning (2.8%), sea salt (2.7%), residual oil combustion (2.6%), gasoline (1.9%), automobile lead (0.5%), components unknown (3.4%). Seven including vehicles (29.6%), (17.4%), (14.7%), (12.6%), (12.4%), (5.8%) (1.9%) identified analysis. two are compared reasons differences qualitatively discussed better understanding sources. Additionally, impact air pathways on evaluated trajectories calculated with Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) backward trajectory model. Source contributions collected during four patterns event periods model analyzed. Results revealed that contribution traffic (47.0%) stagnant conditions (S) much higher than (33.4%) sampling period. During (AD) when passed over Korean peninsula, accounted 25.2 23.0% mass, respectively, whereas contributed only 10.8% AD Yellow Sea. (BB) equaled 63.8%.