Monitoring of benzene, toluene and xylenes (BTEX) was conducted along
with traffic counts at 17 roadside sites in urban areas of
HoChiMinh. Toluene was the most abundant substance, followed
byp,m-xylenes, benzene,o-xylene and ethylbenzene. The maximum
observed hour-average benzene concentration was 254μg/m3
. Motorcycles contributed to 91% of the traffic fleet. High correlations
among BTEX species, between BTEX concentrations and the volume of
on-road motorcycles, and between inter-species ratios in
air and in gasoline indicate the motorcycle-exhaust origin of BTEX
species. Daily concentrations of benzene, toluene, ethylbenzene,
p,m-xylenes ando-xylene were 56, 121, 21, 64 and 23μg/m3
, respectively. p,m-xylenes possess the highest ozone formation
potential
among the BTEX family
http://www.sciencedirect.com/science/article/pii/S100107421260045X
http://repository.vnu.edu.vn/handle/VNU_123/32862
http://www.sciencedirect.com/science/article/pii/S100107421260045X
http://repository.vnu.edu.vn/handle/VNU_123/32862
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