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035 _a.b11765203
099 9 _aAIT Thesis no. EV-99-31
100 0 _aNguyen Tan Phong
245 1 0 _aAir pollutant levels associated with traffic volume :
_ba case study of motorcycles in Bangkok
260 _aBangkok :
_bAsian Institute of Technology,
_c1999
300 _a50, [18] leaves
490 1 _aThesis ;
_vno. EV-99-31
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1999
520 _aThis study focused on exhaust gas em1ss1on from two-stroke and four-stroke motorcycle engines. Ambient air quality and traffic volume of vehicle in Bangkok was also examined. Testing exhaust gas emission under idle conditions shows that concentration emission from two-stroke is higher than four-strokes. Carbon monoxide (CO) emission is relatively low in both two and four-stroke engine. Hydrocarbon (HC) emission from two stroke engines is higher than standard. Driving cycle test shows that exhaust gas emission from two and four-stroke engine is higher than standard, while HC emitted from four-stroke is lower. The study also shows that benzene in ambient air exceeded the WHO guidelines. The main air pollution problem in Bangkok is suspended particulate matter (SPM) and particulate matter (PM-10). Particulate concentration in Bangkok streets is relatively high and reaches alarming levels due to the poor engine tuning and maintenance, and engine overloading. Carbon monoxide (CO) during the daytime varies from peak to non-peak hours and vehicle emission contributes to the concentration of CO in ambient air. The number of motorcycles takes into account of 25-30 percent of total number of vehicles. Finally, air pollution in Bangkok has reached alarming level, requiring immediate measure to reduce and minimize impact on human health and the environment.
650 0 _aMotorcycles
_zThailand
_zBangkok
650 0 _aAir
_xPollution
_zThailand
_zBangkok
700 0 _aSamorn Muttamara,
_eChairperson
700 1 _aNguyen, Cong Thanh,
_eExamination Committee
700 0 _aPreeda Pakpian,
_eExamination Committee
710 2 _aSwedish International Development Cooperation Agency (Sida),
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. EV-99-31
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B12097
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