Diurnal variation of particulate matter and their contributory sources during the dry season at a suburb in Bangkok. | |
| Author | Do Thi Thanh Canh |
| Call Number | AIT Thesis no.EV-07-12 |
| Subject(s) | Air quality--Thailand--Bangkok Air|xPollution--Thailand--Bangkok |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Environmental Engineering and Management. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-07-12 |
| Abstract | Samples of ambient particulate matter (PM) were routinely collected during the dry season from November 2006 to February 2007 at the Asian Institute of Technology (AIT). a suburban site of the Bangkok Metropolitan Region (BMR). This is a long-term research on PM source apportionment in BMR conducted at AIT. Total of one hundred and two pairs (102) of PM2.5 and PM10-2.5 were collected during the daytime (6:30 a.m. to 6:30 p.m.) and nighttime (6:30 p.m. to 6:30 a.m.), separately, using two collocated Dichotomous samplers. Mass concentration and concentrations of 20 elements, 8 water-soluble ions and black carbon were quantified. PM2.5 and PM10.2.5 average 12-h concentrations were 46±20 and 35±10 g/m3, respectively during the daytime, while the corresponding values for the nighttime were 68±32 and 34±9 g/m3, respectively. Generally, both PM2.5 concentrations and BC during the nighttime were higher than the daytime, which is possibly due to open burning near the site in the evening and the more atmospheric stagnant conditions at night. The most dominant constituents of the fine particles by mass were sulfate, ammonium and BC whereas the most abundant species in coarse particles were calcium, sulfate and nitrate. The results of receptor modeling indicated that during the daytime the major sources contributing to PM10-2.5 were construction (68%) and secondary (14%) whereas for the fine fraction biomass burning (40%) and secondary (NHa)2SO4 (30%) were major contributors. During the nighttime, biomass burning was the major contributing source to fine particles (75%) while the construction was the major source (72%) for the coarse fraction. High levels, especially PM2.5, observed are potentially harmful and the major contributing sources such as the biomass open burning should be properly controlled to reduce the health risks. |
| Year | 2007 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-07-12 |
| 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 and Management (EV) |
| Chairperson(s) | Nguyen Thi Kim Oanh; |
| Examination Committee(s) | Chettiyappan Visvanathan;Shipin, Oleg; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2007 |