Ingestion of leafy vegetables is an important dietary component of most Africans due to its health benefits. High levels of polycyclic aromatic hydrocarbons (PAHs) in the leafy vegetables may pose a significant health hazard to the consumers. Rose/Hibiscus, Chinese cabbage, lettuce, and garden egg leaves from farms along the Nima Creek, Accra, were selected. At each sampling site, the vegetable was uprooted and cut into leaves, stem, and root and analyzed differently. The GC-MS method was employed in the identification and quantification of 16 PAHs in the samples. The analysis was done at CSIR – Water Research Institute Organic Laboratory. The results obtained show concentrations of acenapththylene, acenapthene, benzo[a]anthracene, benzo[b]fluoranthene, and benzo[a]pyrene (except chrysene and pyrene which were found in garden egg leaves and Chinese cabbage respectively), while naphthalene was detected in all the vegetables. The mean concentration of phenanthrene in leaves, stem, and roots of Chinese cabbage vegetable varies according to the following order: roots (0.744 ± 0.16 μg/kg) ≥ leaves (0.598 ± 1.21 μg/kg) ≥ stem (0.327 ± 1.01 μg/kg). From the results of the isomeric ratios, the source of the PAHs in the leafy vegetables are from mixed sources, i.e., either pyrogenic and petrogenic origins. This calls for the formulation of stringent policies on the importation of over-age vehicles into the countries as well as on the indiscriminate burning of materials containing PAHs.
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Aichner et al. (2007). Polycyclic aromatic hydrocarbonsand polychlorinated biphenyls in urban soils from Kathmandu, Nepal. Org Geochem, 38, 700–715.
Amellal, et al. (2006). High sorption of phenanthrene in agricultural soils Agron. Sustain. Dev, 26(2006), 99–106.
Canadian Council of Ministers of the Environment (CEQG). (2001). Canadian environmental quality guidelines. Canadian Council of Ministers of the Environment, Winnipeg.
Chien, & Huang. (2010). Sizes and polycyclic aromatic hydrocarbon composition distributions of nano, ultrafine, fine, and coarse particulates emitted from a four-stroke motorcycle. J Environ Sci Health A, 45, 1768–1774.
Iqbal, et al. (2008). Polycyclic aromatic hydrocarbons in Louisiana rivers and coastal environments: source fingerprinting and forensic analysis. Environ Forens, 9, 63–74.
Kieron, et al. (2005). Long-term fate of polychlorinated biphenyls and polycyclic aromatic hydrocarbons in an agricultural soil. Environmental Science & Technology - ENVIRON SCI TECHNOL, 39(10), 3663–3670.
Liu, Y., Chen, L., Jianfu, Z., Qinghui, H., Zhiliang, Z., & Hongwen, G. (2008). Distribution and sources of polycyclic aromatic hydrocarbons in surface sediments of rivers and an estuary in Shanghai. China. Environ Pollut, 154, 298–305 18045759.
Oanh, et al. (2013). Chaaracterisation of gaseous pollutants and PM2.5 at fixed roadsides and along vehicle traveling routes in Bangkok Metropolitan Region. Atmos Environ, 77, 674–685.
Obiri, et al. (2011). Quantification and chaaracterisation of vehicle-based polycyclic aromatic hydrocarbons (PAHs) in street dust from Tamale Metropolis. Environ. Sci. Pollut. Res., 18, 1166–1173.
Obuobie, E., Keraita, B., Danso, G., Amoah, P., Cofie, O. O., Raschid-Sally, L., Drechsel, P. (2006). Irrigated urban vegetable production in Ghana: characteristics, benefits and risks. Accra, Ghana: IWMI.
Rocher, V., Azimi, S., Moilleron, R., & Chebbo, G. (2004). Hydrocarbons and heavy metals in the different sewer deposits in the ‘Le Marais’ catchment (Paris, France): stocks, distributions and origins. Sci Total Environ, 323, 107–122 15081721.
Salvador et al. (2012) Presence of polycyclic aromatic hydrocarbons (PAHs) in semi-rural environment in Mexico City. Fossil Fuel and the Environment, Dr. Shahriar Khan (Ed.), ISBN: 978-953-51-0277-9
Savinov, et al. (2003). Polycyclic aromatic hydrocarbons (PAHs) and organochlorines (Ocs) in bottom sediments of the GubaPachenga, Barents Sea, Russia. Sci Total Environ, 306, 39–56.
Stout. (2007). Chaaracterisation and source of unknown “tar-like material” and “slag” in a former oil field in Compton, California. Environ Forens, 8, 265–282.
Tahir, et al. (2008). Polycyclic aromatic hydrocarbons in urban soils of Kemaman. The Malaysian Journal of Analytical Sciences, 12(1), 69.
Tuteja, et al. (2011). Quantification of polycyclic aromatic hydrocarbons in leafy and underground vegetables: a case study around Panipat City, Haryana, India. Journal of Environmental Science and Technology, 4, 611–620.
Vácha, et al. (2010). Polycyclic aromatic hydrocarbons in soil and selected plants. Plant Soil Environ., 56(9), 434–443.
Wang, X. C., Sun, S., Ma, H. Q., & Liu, Y. (2006). Sources and distribution of aliphatic and polyaromatic hydrocarbons in sediments of Jiaozhou Bay, Qingdao, China. Mar Pollut Bull, 52, 129–138 16194554.
Wenzl, T., Simmon, R., Anklam, E., Kleiner, J. (2006). Analytical methods for aromatic hydrocarbons (PAHs) in food and the environment needed for new food legislation in the European Union. TrAC Trends in Analytical Chemistry, 25(7), 716–725.
The authors of this research appreciate the immense support from the Director of Water Research Institute, Dr. J. A. Ampofo, and Mr. Sampon Siaw Krodua of the cartography unit of the Water Research Institute.
Funds for this study were provided by the Government of Ghana (Grant No. CSIR/WRI/16/002)
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Mohammed, S., Obiri, S., Ansa-Asare, O.D. et al. Assessment of concentration of polycyclic aromatic hydrocarbons (PAHs) in vegetables from farms in Accra, Ghana. Environ Monit Assess 191, 417 (2019). https://doi.org/10.1007/s10661-019-7538-5
- Leafy vegetables
- Nima Creek