03986nas|a2200397 i 4500 20260817172549.0 040430s2003 th u m rtt 00| a1eng d .b11924019 AIT Thesis no. EV-03-15 Pham Huong Giang Chemical composition of airborne particles and organic compound phase distribution : a regional comparative study Pathum Thani, Thailand : Asian Institute of Technology, 2003 144 p. : ill. Thesis ; no. EV-03-15 Thesis (M.Sc.) - Asian Institute of Technology, 2003 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science. This research aimed to determine and compare the levels and phase distribution of airborne PCBs, pesticides, P AHs and ions at two sites in the tropical region during the dry season 2002-2003. These two sites are located in Bangkok and Hanoi and represent suburban areas of the cities. An Anderson-type high volume sampler was used to take sample for a the period of 24 hours. Gas phase pollutants were adsorbed by Polyurethane Foam (PUF) and particulate matter was trapped by Quartz Fiber Filter (QFF). Pesticides and PCBs were analyzed by GC/ECD. HPLC/FLD/UV was used to determine P AHs while IC was used to analyzed ions. 16 selected pesticides were sorted into 6 groups (BHCs, DDT, Endosulfan, Aldrin, Endrin, Heptachlor). 14 compounds of PCBs were sorted into 7 groups (PCBs-3CI, PCBs- 4CI, PCBs-5CI, PCBs-6CI, PCBs-7Cl, PCBs-1 OCl). The average levels of individual PCBs and pesticides at both sites vary but remained less than 1 ng m-3. Total concentration of PCBs in Bangkok was 949 ng/m3 which is slightly higher as compared to Hanoi (729 ng/m3) whereas the total concentration of pesticides in Bangkok was 1076 ng/m3 which is lower than that in Hanoi. However the levels of PCBs and pesticides still can be considered to be in the same range. These levels were several times higher as compared to some other sites in the world, which is probably due to higher source strength. Both sites in this study are suburban areas surrounded by residential households. The levels of selected P AHs in Bangkok were around a dozen of ng m-3 which was nearly 3 times higher than that in Hanoi. Source of PAHs in ambient air in Bangkok may be mainly from traffic and industrial emission. The levels of selected ions in particulate matter were the same range at both sites and less than 10 og/m3. High levels ofN03- and SO/ are consistent to the fact that emissions from transport and industries are predominant anthropogenic sources of air pollution in Hanoi and Bangkok. Na+, Mg2+. Ca2+ and er is probably related to sea salt, road dust, soils, cement and lime at both sites. The obtained database from this research may be useful for setting up the air-quality management programs to reduce health risks and environmental air pollution caused by the pollutants. Organic compounds Persistent pollutents Nguyen, Thi Kim Oanh, Chairperson Preeda Pakpian, Examination Committee Satoh, Hiroyasu, Examination Committee Electricity of Vietnam, Scholarship donor Asian Institute of Technology. Thesis ; no. EV-03-15 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B08233 .b11924019 mnait u 240417 0 040430 m a u 0 mnait mnarc 22 40 Barcode : 30050120706683 CREATED : 2014-04-02 RECORD # : i12755916 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160051255 CREATED : 2016-05-25 RECORD # : i12990413 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 16562 16562 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no. EV-03-15 30050120706683 2026-08-17 17:25:49 3 2026-08-17 22 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. EV-03-15 30050160051255 2026-08-17 17:25:49 2026-08-17 40