AI SearchChemical composition of airborne particles and organic compound phase distribution : a regional comparative study
Call Number: AIT Thesis no. EV-03-15 Material type:
SeriesSeries: Asian Institute of Technology. Thesis ; no. EV-03-15Publication details: Pathum Thani, Thailand : Asian Institute of Technology, 2003Description: 144 p. : illSubject(s): Online resources: Dissertation note: Thesis (M.Sc.) - Asian Institute of Technology, 2003 Summary: 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.
| Cover image | Item type | Current library | Home library | Collection | Shelving location | Call number | Materials specified | Vol info | URL | Copy number | Status | Notes | Date due | Barcode | Item holds | Item hold queue priority | Course reserves | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
22-AIT Thesis (Replacement)
|
Asian Institute of Technology Library AIT Publications | AIT Thesis no. EV-03-15 (Browse shelf(Opens below)) | 3 | Available | 30050120706683 | |||||||||||||
40-Archives
|
Asian Institute of Technology Library Archives | AIT Thesis no. EV-03-15 (Browse shelf(Opens below)) | Available | 30050160051255 |
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.
There are no comments on this title.