Comparative study of existing monitoring methods of PM2.5 for Bangkok conditions | |
| Author | Opal Prakobboon |
| Call Number | AIT Thesis no. EV-02-33 |
| Subject(s) | Aerosols, Radioactive Air quality |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science. School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-02-33 |
| Abstract | This study was conducted to compare three sampling methods for fine particulate (PM2. 5) in ambient air during July - September 2002 at two sampling sites in Bangkok Metropolitan Region. These two sites, Bansomdej and Dindang station were selected to represent residential and traffic exposure condition, respectively. Dichotomous sampler and MiniVol sampler were tested for their validity against the Federal Reference Method (FRM). The collected air samples were analysed for mass concentrations and ionic composition. Statistical analysis, sequences of analysis of variance, t-test, and correlation, were performed on monitoring results. The result showed that the PM2.5 concentrations by the dichotomous sampler and the FRM are well correlated with correlation coefficient of 0.97 and 0.98 for Bansomdej and Dindang, respectively. Statistical analysis showed no difference in the mean PM2. 5 concentrations found in air samples collected by these 2 methods from both sampling sites (p-values of 0.3259 and 0.4344). In contrast, the Mini Vol method tends to overestimate the PM2. 5 concentration as compared to the FRM method. The correlation coefficient of the PM2. 5 produced by these 2 methods are 0.57 and 0.72 for Bansomdej and Dindang, respectively. Statistical analysis confirmed the difference in the mean PM2. 5 concentrations found by these 2 methods with p-values of 0.0002 and 0.0082 for Bansomdej and Dindang, respectively. The PM2. 5 concentrations measured in this study were compiled together with results of previous studies and of Pollution Control Department. It can be seen that for both d1y and wet season, the PM2. 5 concentration was mostly below the standard limit of 65 µg/m3 set by USEPA. Ionic composition analysis of PM2 . 5 and PMJO-i.s showed similar major anions and cations of air samples collected from both stations by 3 methods. Sulfate and potassium were found to be major anion and cation in all samples, respectively. Statistical analysis confirmed that there is no difference in ionic concentration by dichotomous and FRM for 4 ionic species (out of 8) for Dindang and for 6 ionic species for Bansomdej. The analysis showed there is a difference in ionic concentration by FRM and MiniVol for all 8 species at Dindang and for 4 species at Bansomdej. Shorte1m and longte1m strategies for PM2.5 management in Bangkok Metropolitan Region (BMR) were outlined. |
| Year | 2002 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-02-33 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Nguyen Thi Kim Oanh |
| Examination Committee(s) | Muttamara, Samom ;Supat Wangwongwatana |
| Scholarship Donor(s) | Royal Thai Government |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2002 |