Analysis of Benzene Exposure Levels on Commuters Traveling within the Metropolitan Area of Costa Rica

DOI: 10.4236/ojap.2015.41005   PDF   HTML   XML   4,333 Downloads   4,870 Views   Citations

Abstract

This study reports the benzene exposure levels of commuters traveling within the metropolitan area of Costa Rica using personal cars, buses, and urban trains. 47 in-vehicle samples were collected in the 2014 wet season under three different driving conditions: rush hour traffic, normal traffic and weekends. Samples were collected in Tedlar bags and analyzed using 75 μm carboxenpolydimethylsiloxane (CAR/PDMS) and gas chromatography with flame ionization detection (GC-FID). Additionally, duplicate samples were collected on adsorption tubes filled with Tenax TA and analyzed by thermal desorption (TD) and GC-FID. Results indicate that travelling in cars and buses under rush hour conditions exposes commuters to statistically equal average benzene concentration of 48.7 and 51.6 μg/m3, respectively. Average benzene levels in urban trains (33.0 μg/m3) were measured only during morning rush hours. Greater benzene levels in buses than personal cars concentrations may be attributable to the immersion of traffic-related emission within the bus cabins. Factors, such as the driving pattern, the number of vehicles on the route, the road infrastructure, and the prevalence of gasoline-fueled vehicles in Costa Rica, may increase ambient benzene concentrations. Benzene levels inside car cabins reported in this study are in the range of those reported in other urban areas; however, the corresponding concentrations inside buses and urban trains (rush hour only) are higher than previously published exposure levels.

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Villalobos-Gonzalez, W. , Esquivel-Hernandez, G. , Sanchez-Murillo, R. , Corrales-Salazar, J. and Valdes-Gonzalez, J. (2015) Analysis of Benzene Exposure Levels on Commuters Traveling within the Metropolitan Area of Costa Rica. Open Journal of Air Pollution, 4, 38-46. doi: 10.4236/ojap.2015.41005.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] L?fgren, L., Persson, K. and Petersson G. (1991) Exposure of Commuters to Volatile Aromatic Hydrocarbons of Petrol Exhaust. Science of the Total Environment, 108, 225-233.
http://dx.doi.org/10.1016/0048-9697(91)90359-M
[2] Barrefors, G. and Petersson, G. (1996) Exposure to Volatile Hydrocarbons in Commuter Trains and Diesel Buses. EnvironmentalTechnology, 17, 643-647.
http://dx.doi.org/10.1080/09593331708616429
[3] Gomez-Perales, J.E., Colvilea, R.N., Nieuwenhuijsena, M.J., Fernandez-Bremauntz, A., Gutierrez-Avedoy, V.J., Paramo-Figueroa, V.H., Blanco-Jimenez, S., Bueno-Lopez, E., Mandujanoc, F., Bernabe-Cabanillas, R. and Ortiz-Segovia, E. (2003) Commuters’ Exposure to PM2.5, CO, and Benzene in Public Transport in the Metropolitan Area of Mexico City. Atmospheric Environment, 38, 1219-1229.
http://dx.doi.org/10.1016/j.atmosenv.2003.11.008
[4] Ongwandee, M. and Chavalparit, O. (2010) Commuter Exposure to BTEX in Public Transportation Modes in Bangkok, Thailand. Journal of Environmental Sciences, 22, 397-404. http://dx.doi.org/10.1016/S1001-0742(09)60121-2
[5] Rivett, A.C., Martin, D., Gray, D.J., Price, C.S., Nickless, G., Simmonds, P.G., O’Doherty, S.J., Greally, B.R., Knights, A. and Shallcross, D.E. (2003) The Role of Volatile Organic Compounds in the Polluted Urban Atmosphere of Bristol, UK. Atmospheric Chemistry and Physics Discussions, 3, 769-796. http://dx.doi.org/10.5194/acpd-3-769-2003
[6] Steinemann, A. (2004) Human Exposure, Health Hazards, and Environmental Regulations. Environmental Impact Assessment Review, 24, 695-710.
http://dx.doi.org/10.1016/j.eiar.2004.06.002
[7] Zhao, L., Wang, X., He, Q., Wanga, H., Sheng, G., Chanb, L.Y., Fua, J. and Blake, D.R. (2004) Exposure to Hazardous Volatile Organic Compounds, PM10 and CO While Walking along Streets in Urban Guangzhou, China. Atmospheric Environment, 38, 6177-6184.
http://dx.doi.org/10.1016/j.atmosenv.2004.07.025
[8] Chan, L.Y., Lau, W.L., Wang, X.M. and Tang, J.H. (2003) Preliminary Measurements of Aromatic VOCs in Public Transportation Modes in Guangzhou, China. Environment International, 29, 429-435 http://dx.doi.org/10.1016/S0160-4120(02)00189-7
[9] Chertok, M. (2004) Comparison of Air Pollution Exposure for Five Commuting Modes in Sydney—Car, Train, Autobus, Bicycle and Walking. Health Promotion Journal of Australia, 15, 63-67.
[10] Esquivel-Hernandez, G., Sibaja-Brenes, J.P., Mora-Barrantes, J.C. and Valdes-Gonzalez, J. (2014) First Measurements of Methyl Tert-Butyl Ether (MTBE) in the Ambient Air in San Jose, Costa Rica. WIT Transactions on Ecology and the Environment, Environmental Impact II, 181, 435-442. http://dx.doi.org/10.2495/EID140371
[11] Herrera, J., Rodriguez, S. and Baez, A.P. (2009) Chemical Composition of Bulk Precipitation in the Metropolitan Area of Costa Rica, Central America. Atmospheric Research, 94, 151-160. http://dx.doi.org/10.1016/j.atmosres.2009.05.004
[12] Lee, J., Man Hwang, S., Woon, D. and Suk Heo, G. (2002) Determination of Volatile Organic Compounds (VOCs) Using Tedlar Bag/Solid-Phase Microextraction/Gas Chromatography/Mass Spectrometry (SPME/GC/MS) in Ambient and Workplace. Air Bulletin of Korean Chemistry Society, 23, 488-496. http://dx.doi.org/10.5012/bkcs.2002.23.3.488
[13] Bouvier-Brown, B.C., Holzinger, R., Palitzsch, K. and Goldstein, A.H. (2007) Quantifying Sesquiterpene and Oxygenated Terpene Emissions from Live Vegetation Using Solid-Phase Microextraction Fibers. Journal of Chromatography (A), 1161, 113-120.
http://dx.doi.org/10.1016/j.chroma.2007.05.094
[14] Pawliszyn, J. (1997) Solid Phase Microextraction, Theory and Practice. Wiley-VCH, New York.
[15] Isidorov, V.A., Vinogorova, V.T. and Rafalowski, K. (2003) HS-SPME Analysis of Volatile Organic Compounds of Coniferous Needle Litter. Atmospheric Environment, 37, 4645-4650.
http://dx.doi.org/10.1016/j.atmosenv.2003.07.005
[16] Thorenz, R., Kundel, M., Muller, L. and Hoffman, T. (2012) Generation of Standard Gas Mixtures of Halogenated, Aliphatic, and Aromatic Compounds and Prediction of the Individual Output Rates Based on Molecular Formula and Boiling Point. Analytical and BioanalyticalChemistry, 404, 2177-2183. http://dx.doi.org/10.1007/s00216-012-6202-5
[17] Leung, P.L. and Harrison, R.M. (1999) Roadside and In-Vehicle Concentrations of Monoaromatic Hydrocarbons. Atmospheric Environment, 33, 191-204. http://dx.doi.org/10.1016/S1352-2310(98)00147-2
[18] Jo, W.K. and Yu, C.H. (2001) Public Bus and Taxicab Driver’s Exposure to Aromatic Work-Time Volatile Organic Compounds. Environmental Research Section (A), 86, 66-72.
http://dx.doi.org/10.1006/enrs.2001.4257
[19] Direccion General de Calidad Ambiental (2007)
http://www.digeca.go.cr/documentos/sustancias%20quimicas/Capitulo%201%20COPs%20noviembre.pdf.
[20] O’Donoghue, R.T., Gill, L.W., McKevitt, R.J. and Broderick, B. (2007) Exposure to Hydrocarbon Concentrations While Commuting or Exercising in Dublin. Environment International, 33, 1-8. http://dx.doi.org/10.1016/j.envint.2006.05.005

  
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