Benzene and lead exposure assessment among occupational bus drivers in Bangkok traffic.

Benzene and lead exposure assessment among occupational bus drivers in Bangkok traffic. Research Abstract Details 

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Benzene and lead exposure assessment among occupational bus drivers in Bangkok traffic. Abstract Text:

S Muttamara,Shing Tet Leong,M Arayasiri,

Four environmental and biological monitoring sites were strategically established to evaluate benzene and lead exposure assessment at various traffic zones of Bangkok Metropolitan Region(BMR). Biological measurement of 48 non air-conditioned, male bus drivers was carried to study the relationship between individual exposure levels and exposure biomarkers. The study group was further subdivided into four age groups(16-25, 26-35, 36-45 and 46-55 years old) to monitor the age-related exposure effects. A total of 12 unexposed persons were deliberately chosen as the control group. Measurement of unmetobolized benzene in blood and analysis of urinary tt-Muconic acid urine and urinary creatinine are recommended as biomarkers of benzene exposure. Measurement of lead in blood and urine is also recommended for the biological monitoring of lead exposure. During the monitoring period, benzene and lead levels at Yaowarat Road was C6H6: 42.46 +/- 3.88 microg/m3 , Pb: 0.29 +/- 0.03 microg/m3 and decreased to C6H6: 33.5 +/- 1.35 microg/m3, Pb: 0.13 +/- 0.01 microg/m3 at Phahonyothin Road. Significant difference was established between the nonsmoking exposed group and nonsmoking control group for blood benzene concentrations (P < 0.001, two-tailed, Mann-Whiteney U test). Strong correlations were also found between trans-trans-Muconic acid concentrations in post shift samples and atmospheric benzene concentrations. Similarly, good correlation between all of biomarkers and lead level in air is established from automobile emissions. The analysis revealed that among the occupational population in the urban sites, the driver groups were found to have the highest risk of benzene and lead exposures derived from automobile emission.

Benzene and lead exposure assessment among occupational bus drivers in Bangkok traffic. Publishing Authors By Initials

S Muttamara,ST Leong,M Arayasiri,

For similar complex mixtures: vehicle emissions research abstracts see: complex mixtures: vehicle emissions research

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Benzene and lead exposure assessment among occupational bus drivers in Bangkok traffic. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of environmental sciences (China)

VOLUME: 16

Page Numbers: 61-6

Journal Abbreviation: J Environ Sci (China)

ISSN: 1001-0742

DAY: 8

MONTH: 02

YEAR: 2004

Benzene and lead exposure assessment among occupational bus drivers in Bangkok traffic. Information

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LANGUAGE: eng

NlmUniqueID: 100967627

Benzene and lead exposure assessment among occupational bus drivers in Bangkok traffic. Keywords Mesh Terms:

KEYWORDS: Vehicle Emissions

MESH TERMS: analysis

Chemical & Substance for Abstract: Benzene and lead exposure assessment among occupational bus drivers in Bangkok traffic. Information

Substance Name: Lead

Registry Number: 7439-92-1

Grant and Affiliation Information for Benzene and lead exposure assessment among occupational bus drivers in Bangkok traffic.

AFFILIATION: Research Lab Supervisor, Urban Environmental Engineering and Management Program, School of Environment, Resource and Development, Asian Institute of Technology, G.P.O. Box 4, Klong Luang, Pathumthani 12120, Thailand. tet@ait.ac.th

Country: Netherlands

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MEDLINETA: J Environ Sci (China)

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