Estimation of gas-particle partitioning coefficients (Kp) of carcinogenic polycyclic aromatic hydrocarbons in carbonaceous aerosols collected at Chiang-Mai, Bangkok and Hat-Yai, Thailand.

摘要: To assess environmental contamination with carcinogens, carbonaceous compounds, water-soluble ionic species and trace gaseous were identified quantified every three hours for days at different atmospheric layers the heart of Chiang-Mai, Bangkok Hat-Yai from December 2006 to February 2007. A DRI Model 2001 Thermal/Optical Carbon Analyzer IMPROVE thermal/optical reflectance (TOR) protocol was used quantify organic carbon (OC) elemental (EC) contents in PM10. Diurnal vertical variability also carefully investigated. In general, OC EC mass concentration showed highest values monitoring period 21.00-00.00 as consequences human activities night bazaar coupled reduction mixing layer, decreased wind speed termination photolysis nighttime. Morning peaks compounds observed during sampling 06:00-09:00, emphasizing main contribution traffic emission cities. The estimation incremental lifetime particulate matter exposure (ILPE) raises concern high risk accumulation over workers residents living close observatory sites. average total Baiyoke Suit Hotel Sky are approximately ten times higher than those air samples collected Prince Songkla University campus corpse incinerator fish-can manufacturing factory but only slightly rice straw burning province. This indicates a developing lung cancer other respiratory diseases across buildings located Pratunam area. Using knowledge fractions PM10, one can estimate gas-particle partitioning polycyclic aromatic hydrocarbons (PAHs). Dachs-Eisenreich model highlights crucial role adsorption low molecular weight PAHs, whereas both absorption tend account PAHs urban residential zones Thailand. Interestingly, mode alone plays minor Hat-Yai.