This research used high-volume air sampling (PS-1) and micro-orifice uniform deposit impactor (MOUDI) to measure concentrations of polycyclic aromatic hydrocarbons (PAHs) in the air of a agricultural residue open burning area in Jhushan and Singang station during the rice straw non-burning and burning periods. And PAHs of different size distributions are analyzed. Finally, absolute principal component analyze (APCA) model confer the probable sources of pollution in open burning area. The average PAHs concentrations were 330.04 and 567.81 ng/m3 during the rice straw non-burning and burning period in Jhushan station, the average PAHs concentrations were 427.16 and 571.80 ng/m3 during the rice straw non-burning and burning period in Singang station, respectively, in the rice straw burning period, which were higher than those on the non-burning days. The results of APCA model analysis showed that the contributions of PAHs from mobile source (gasoline and diesel) were 66.50 ¡Ó 7.99 %, burning incense in temple source were 14.83 ¡Ó 6.68 % and burning coal and wood source were 18.67 ¡Ó 6.17 % during the rice straw non-burning period. PAHs from mobile (gasoline) and rice straw non-burning source were 57.27 ¡Ó 6.90 %, mobile source (diesel) were 42.73 ¡Ó 6.89 % during the rice straw burning period in Jhushan station. The results of APCA model analysis showed that the contributions of PAHs from mobile (diesel) and burning incense in temple source were 45.67 ¡Ó 6.43 %, mobile (gasoline) and plastics incinerator source were 54.33 ¡Ó 6.39 % during the rice straw non-burning period. PAHs from burning incense in temple, rice straw, mobile (gasoline and diesel) source were 50.69 ¡Ó 4.55 %, plastics incinerator source were 36.78 ¡Ó 4.24 % and other source were 12.53 ¡Ó 2.71 %¡C

The high-volume air sampling (PS-1) and micro-orifice uniformdeposit impactor (MOUDI) were used to measure the concentrations ofpolycyclic aromatic hydrocarbons (PAHs) in the atmosphere for fourseasons at Tuzo-Yin and Hsiung-Kong site in Kaohsiung city, in the airof a agricultural residue open burning area in Jhu-Shan and Sin-Gang siteduring the rice straw non-burning and burning periods, together with thesize distributions. Also, the receptor model was employed to determinethe potential sources of PAHs. The results show that the highest concentrations of PAHs occurred inwinter, being 143.9 ng/m3 and 182.9 ng/m3 at Tzuo-Yin and Hsiung-Kongsite, respectively; while the lowest concentrations of PAHs occurred insummer, being 81.4 ng/m3 and 95.2 ng/m3. The low-weight PAHs in thetwo sites were abundant in gaseous phase, being 43.8−96.7% and65.2−97.5% at Tzuo-Yin and Hsiung-Kong site, respectively. Meanwhile,the high-weight PAHs were almost present in particulate phase, being40.5−95.2% and 24.8−94.1 % at Tzuo-Yin and Hsiung-Kong site,respectively. The average PAHs concentrations were 330.04 and 567.81 ng/m3during the rice straw non-burning and burning period in Jhu-Shan site, theaverage PAHs concentrations were 427.16 and 571.80 ng/m3 during therice straw non-burning and burning period in Sin-Gang site, respectively,in the rice straw burning period, which were higher than those on thenon-burning days. The results of by CMB receptor modeling indicated that the major sources of pollution was exhaust emission (49.5−63.3%) in Tzuo-Yin site,and was burning source (49.1−63.7%) in Hsiung-Kong site in Kaohsiungcity. The results of APCA model analysis indicated that the major sourcesof pollution was mobile source (gasoline and diesel) were 66.5¡Ó8.0%during the rice straw non-burning period, and was mobile (gasoline) andrice straw non-burning source were 57.3¡Ó6.9% during the rice strawburning period in Jhu-Shan site in Central Taiwan. The results of APCAmodel analysis indicated that the major sources of pollution was mobile(gasoline) and plastics incinerator source were 54.3¡Ó6.4% during the ricestraw non-burning period, and was burning incense in temple, rice straw,mobile (gasoline and diesel) source were 50.7¡Ó4.6% during the rice strawburning period in Sin-Gang site in Central Taiwan.