| Author | Pongsakorn Pavanavivat |
| Call Number | AIT Thesis no.EV-06-32 |
| Subject(s) | Air--Pollution--Thailand--Bangkok
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| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-06-32 |
| Abstract | Airborne particles were investigated in the AIT sampling site during dry season, from October 2005 to February 2006. Mass, black carbon, ionic and elemental concentrations of airborne particles were measured on Quartz and Mixed cellulose-ester filters from two collocated Sierra Anderson dichotomous samplers, which collected 24-hour of fine (size <2.5.tm or PM2.S) and coarse (size in the range of 2.5-10m or PM10-2.5) fractions of particles. Mixed cellulose-ester sampled filters were analyzed for 20 elements by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) and for black carbon (BC) by a reflectometer. Quartz sampled filters were analyzed for mass by a gravimetric method using a microbalance and ionic composition by ion chromatography (IC). During the study period, four samples of PM2.5 exceeded the U.S. EPA PM2.5 standards of 65 g/m3 and no samples of PM10 exceeded the Thai National Ambient Air Quality Standard (NAAQS) of 120 g/m3. The overall ranges of PM2.5 and PM10 were 6-91 g/m3 and 9-109 g/m3, respectively. The average PM2,5-to-PM10 ratios at sampling site was 0.81, indicating that the fine fraction was dominant over the coarse fraction. The correlation between PM2.5 and PM10 was 0.93. The BC (23%) was the major component of PM2.5 followed by the sulfate (14%). In PM10-2.5 the crustal elements (15%) and sulfate ion (11%) were significant. Results of the chemical mass balance receptor model (CMB8) show that the major contributions to PM2.5 at AIT are from biomass burning (38%), diesel traffic (33%) and secondary sulfate (23%). The major sources of the coarse particles include resuspended soil (47%) and biomass burning (26%). The potential long-range transport of PM to the study site was tracked on the days with high sulfate and nitrate content in PM. The 10-day backward trajectories were calculated using the HYSPLIT model. The results indicate that there is a possible contribution from long-range transported of sulfate and nitrate PM, originated from East China land and South China Sea to the study site. |
| Year | 2006 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-06-32 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Nguyen Thi Kim Oanh |
| Examination Committee(s) | Aramaki, Toshiya;Wanna Chueinta |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2006 |