03900nas a2200433 a 4500 20260817163723.0 050929s2005 th uu|m rtt 0| a1eng d .b11971770 AIT Thesis no.EV-05-33 Vo Thi Quynh Truc Assessment of VOC levels from motor vehicle exhaust and potential health effects in Hanoi, Vietnam Pathum Thani, Thailand : Asian Institute of Technology, 2005 99 p. : ill. Thesis ; no. EV-05-33 Thesis (M.Sc.) - Asian Institute of Technology, 2005 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science Road side levels of CO, NO, SO,, Benzene, Toluene, Ethylbenzene, m,p-Xylene, and oXylene (BTEX) were monitored at three streets in Hanoi, Vietnam in November, 2004. Peak hourly traffic volumes were also monitored. The three streets were representative of different characteristics: Tniong Chinh street of high traffic volume (TC), Dien Bien Phil of low traffic volume (DBP), and Nguyen Trai street of high traffic volume located in an industrial zone (NT). BTEX were collected by charcoal tubes at the ground level, while other pollutants, CO, NO, and SO,, were measured by automatic instruments. The BTEX collected in the charcoal tubes were analyzed by GC - FID technique. The geometric mean concentrations of benzene, toluene, ethylbenzene, m,p-xylene and o-xylene were, respectively, 64, 62, 15, 43, and 22 pg/m3 in TC, 31, 38, 9, 26 and 25 pg/m3 in DBP street, and 123, 87, 48, 56, and 30g/m3 in NT. The 24h - average concentrations of CO, NO2 and SO2, respectively, in TC were 5.2, 0.0047 and 0.039 mg/m3, in DBP were 4.5, 0.0007 and 0.025 mg/m3, and in NT were 6, 0.0016 and 0.035 mg/m3, which are all lower than Vietnam ambient air quality standards. Measurements for BTEX in TC were also conducted at 3m, 10m, 30m and 50m downwind of the street, which showed that, toluene, ethylbenzene and xylene decreased with the distance, while benzene concentrations did not follow the same pattern. The Principal Component Analysis showed that pollutant concentrations were correlated with vehicle patterns in Hanoi and that CO and BTEX were mainly emitted from the same sources, though benzene may also come from other sources. The annual mean concentration of benzene in Tniong Chinh street was in the range of 1345pg/m3, which might cause leukemia to the people from life time exposure. Air Pollution potential Vietnam Hanoi Motor vehicles Vietnam Hanoi Pollution control devices Nguyen, Thi Kim Oanh, Chairperson Visvanathan, C., Examination Committee Thammarat Koottatep, Examination Committee Shim, Shang-Gyoo, Examination committee Norwegian Agency for International Development Cooperation (NORAD), Scholarship donor Asian Institute of Technology. Thesis ; no. EV-05-33 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B09403 .b11971770 mnait u 240329 0 050929 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050160056502 CREATED : 2004-02-05 RECORD # : i12461301 LPATRON : 1022174 LCHKIN : 2017-05-14 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 26 TOT RENEW : 16 Barcode : 30050120737308 CREATED : 2004-02-05 RECORD # : i12461313 LPATRON : 1024717 LCHKIN : 2015-05-15 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 2 TOT CHKOUT : 21 TOT RENEW : 21 Barcode : 30050160050489 CREATED : 2016-05-25 RECORD # : i12991557 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 9536 9536 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-05-33 30050160056502 2026-08-17 16:37:23 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-05-33 30050120737308 2026-08-17 16:37:23 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.EV-05-33 30050160050489 2026-08-17 16:37:23 2026-08-17 40