268078 Polycyclic aromatic hydrocarbons exposure assessment and biological monitoring of asphalt blend workers

Monday, October 29, 2012

I-Fang Mao, ID , Department of Occpational Safety and Health, Chung Shan Medical University, Taipei City, Taiwan
Ming-Sung Li , Institute of Environmental and Occupational Health Sciences, ChangChun PetroChemical., Co. Ltd., Taipei, Taiwan, Taiwan
Chung-Jung Tsai , Department of Occupational Safety and Health, Chung Hwa University of Medical Technology, Tainan, Taiwan, Taiwan
Chin-Chi Mao , Institute of Environmental Health Sciences, National Yang Ming University, Taipei City, Taiwan
Mei-Lien Chen , Institute of Environmental Health Sciences, National Yang Ming University, Taipei, Taiwan
Asphalt-blending workers directly expose to asphalt which contains high level of polycyclic aromatic hydrocarbons (PAHs) in the meantime, the health effects on those workers were concerned. 90 asphalt-blending workers were recruited as exposure group and 40 adults with no PAH exposure relative working experiences served as control group. Individual PAH exposure levels of exposure workers were determined by the sampling method that was suggested by US/NIOSH No.5506. Urine sample of each participant was collected to measure urinary 1-hydroxypyrene (1-OHP). HPLC with fluorescence detector was performed to determine the levels of airborne PAHs and urinary 1-OHP. Exposure group was divided to 3 subgroups: field group workers were in charge with mixing the asphalt; operating group workers operated machines; management group workers controlled the quality of field. The average levels of total PAHs were 2456.31 ng/m3, 1779.34 ng/m3, and 901.67 ng/m3 for field group, operating group, and management group, respectively. Mean values of BaP concentration in particle of each group were 2.70 g/g, 1.58 g/g and 2.25 g/g, and the gaseous and particle-bound (G/P) ratios of BaP were 0.57, 1.25 and 0.2, respectively. The average concentration of urinary 1-OHP of exposure workers was 0.17 mol/mol creatinine and was 3.4 fold higher than that of control group (0.05 mol/mol creatinine, p<0.05). Urinary 1-OHP in smokers was 1.26 fold higher than non-smoker among management group (p<0.05). We confirmed asphalt-blending workers exposed to high levels of PAHs and it influenced the urinary 1-OHP levels significantly.

Key words:asphalt-blending manufacturing workers, PAHs, biological monitoring

Learning Areas:
Environmental health sciences
Occupational health and safety
Public health or related research

Learning Objectives:
Assess polycyclic aromatic hydrocarbons exposure and biological monitoring of asphalt blend workers.

Presenting author's disclosure statement:

Qualified on the content I am responsible for because: Professor, School of Occupational Safety and Health, Chung-Shan Medical University, Yaichung, Taiwan, 402
Any relevant financial relationships? No

I agree to comply with the American Public Health Association Conflict of Interest and Commercial Support Guidelines, and to disclose to the participants any off-label or experimental uses of a commercial product or service discussed in my presentation.