Journal of Research in Environmental Science and Toxicology

Journal of Research in Environmental Science and Toxicology (ISSN: 2315-5698) Vol. 5(2) pp. 018-025,  May 2016. DOI: http:/dx.doi.org/10.14303/jrest.2016.015. Copyright © 2016 International Research Journals

 

Full Length Research Paper

Distribution and risk assessment of polycyclic aromatic hydrocarbons in vegetables and agricultural soils from two communities in Rivers State, Nigeria

1Okereke Chioma Joy*, 2Essien, Eka Bassey, 3Wegwu, Matthew O

1Department of Biochemistry, University of Port Harcourt, Nigeria

*Corresponding Author’s Email: chioma.okereke@uniport.edu.ng

Received March 14, 2016;  Accepted April 15, 2016

Abstract

 

The present study investigated the polycyclic aromatic hydrocarbon (PAH) contents of farm soils and three commonly consumed vegetables grown in farmlands in two communities- Alakahia and Eleme, Rivers state, Nigeria and their potential impacts on human health. The total PAH concentrations in vegetables and soil ranged from 1.34 to 9.51 and 51.02 to 93.14 µg/kg, respectively. Samples from the Eleme community had higher PAH concentration than samples from Alakahia community. Pyrene and Fluoranthene were the predominant PAH in the farm soil samples from Alakahia and Eleme respectively. The profile of PAH in the vegetable samples were dissimilar at both communities when compared to the farm soil samples. The Low molecular weight PAH to High molecular weight PAH ratio (LMW-PAH/HMW-PAH) showed that the high molecular PAH were predominant in the Alakahia farm soil while the low molecular PAH dominated the Eleme soil sample. The carcinogenic Potency equivalent concentration (µg/kg) were estimated to be 0.31- 1.51 and 0.37 - 0.97 for vegetablescollected from Alakahia and Eleme communities respectively. These values exceeded the screening value (0.23) for vegetables, thus indicating that the consumption of such vegetables is risky for the exposed population.


Keywords: PAH, Vegetables, Rivers state, Health risk, Carcinogenic.

 

The present study investigated the polycyclic aromatic hydrocarbon (PAH) contents of farm soils and three commonly consumed vegetables grown in farmlands in two communities- Alakahia and Eleme, Rivers state, Nigeria and their potential impacts on human health. The total PAH concentrations in vegetables and soil ranged from 1.34 to 9.51 and 51.02 to 93.14 µg/kg, respectively. Samples from the Eleme community had higher PAH concentration than samples from Alakahia community. Pyrene and Fluoranthene were the predominant PAH in the farm soil samples from Alakahia and Eleme respectively. The profile of PAH in the vegetable samples were dissimilar at both communities when compared to the farm soil samples. The Low molecular weight PAH to High molecular weight PAH ratio (LMW-PAH/HMW-PAH) showed that the high molecular PAH were predominant in the Alakahia farm soil while the low molecular PAH dominated the Eleme soil sample. The carcinogenic Potency equivalent concentration (µg/kg) were estimated to be 0.31- 1.51 and 0.37 - 0.97 for vegetablescollected from Alakahia and Eleme communities respectively. These values exceeded the screening value (0.23) for vegetables, thus indicating that the consumption of such vegetables is risky for the exposed population.

 

Keywords: PAH, Vegetables, Rivers state, Health risk, Carcinogenic. 

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