| Author | Thai Phuong Vu |
| Call Number | AIT Thesis no.EV-07-51 |
| Subject(s) | Air--Pollution--Korea--Seoul
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| 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 |
| Abstract | The intermittent measurements were conducted from November 22, 2006 to March 27, 2007 in an apartment of three bedrooms on the fourth floor of a building which is located at about 50-m from a main road in Seoul, Korea. Two bedrooms were used for measuring penetration of outdoor air particles (0.016-20 um) and NOx into indoor environment. A monitoring site (R1) was in a bedroom with a window directly facing a road. A reference site (R2) was in another bedroom with a window also facing the road but through a small buffering space. Results of measurements show that outdoor NOx, indoor and outdoor particle number concentrations were closely related with traffic volume, wind speed and direction which were in good agreement with a previous study. Snow affected concentrations of submicron particles, but not larger particles and NOx. Ventilation conditions affected oxidization of NO to NO2. Averaged I/O ratios (for R1) of particles 20-100 nm, 100-600 nm and 0.5-20 um were 0.57±0.26, 0.99±0.30 and 0.84±0.28, respectively. The corresponding I/O ratios (for R2) were 20% of those for R1. Peak outdoor NOx, outdoor and indoor particle number concentrations occurred when the apartment was located downwind from the road as at well as calm wind. The stronger wind lower outdoor NO, outdoor and indoor particle number concentrations when the apartment was located upwind. Indoor particle number and NO, concentrations were sometimes higher than those outdoor. It means that in the absence of known indoor pollution sources, outdoor pollutant concentrations are not always higher than indoor concentrations. Decay rates of particles (20-500 nm) by using an air cleaning device were 30-60 times faster than those by natural decay process |
| Year | 2007 |
| 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;Gwi-Nam Bae(Co-Chairperson) |
| Examination Committee(s) | Chongrak Polprasert.;Annachhatre, Ajit P; |
| Scholarship Donor(s) | MOET, Vietnam - AIT Fellowship; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2007 |