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035 _a.b11687071
099 9 _aAIT Thesis no. EV-97-35
100 0 _aPongsit Siriroughudomporn
245 1 0 _aBenzene and toluene emission from vehicles in Bangkok ambient air
260 _aBangkok :
_bAsian Institute of Technology,
_c1997
300 _a98 leaves
490 1 _aThesis ;
_vno. EV-97-35
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Developmen6
502 _aThesis (M.Sc.) - Asian Institute of Technology, 1997
520 _aA monitoring program for benzene and toluene concentrations in ambient air was conducted to evaluate the air pollution problems in Bangkok city arising from vehicle exhaust emission. Four air sampling stations were strategically established to cover the Bangkok Metropolitan Area. The ambient air samples were carried out to determine the correlation of different traffic configurations between peak hour and non peak hour, weekday and weekend, finally between day-time and night-time. The minimum and maximum concentrations of benzene and toluene in ambient air of the study areas were in the range of 12.34-35.82 æg/m3 and 17.43-93.55 æg/m 3 for 8-hour average, respectively. The highest benzene and toluene concentrations were found at Yaowaraj sampling station while the lowest benzene and toluene concentrations were found at Land Development Division sampling station. From the results, it should be noted that benzene and toluene concentrations for peak hour were unexpected to be lower than non peak hour. On the other hand, benzene and toluene concentrations for weekday and day-time were considerably higher than weekend and night time respectively. The finding also shown that there was a correlation between the average benzene and toluene concentrations with average traffic speed in each traffic zones. In general, the benzene concentrations were exceeded WHO guidelines while the toluene concentrations were well below this guidelines, in respect to all the traffic zones in Bangkok.
650 1 0 _aVolatile organic compounds
700 0 _aSamorn Muttamara,
_eChairperson
700 1 _aVisvanathan, C.,
_eExamination Committee
700 1 _aHa, Sung Ryong,
_eExamination committee
710 2 _aThe Electricity Generating Authority of Thailand (EGAT),
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. EV-97-35
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B13929
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