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Ecological Risk Assessment of High Molecular Weight Polycyclic Aromatic Hydrocarbons in Sediments from Qua Iboe River Estuary, South-South, Nigeria
International Journal of Ecotoxicology and Ecobiology
Volume 1, Issue 3, December 2016, Pages: 76-81
Received: Aug. 7, 2016; Accepted: Sep. 12, 2016; Published: Oct. 14, 2016
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Eno Anietie Moses, Department of Chemistry, Faculty of Science, University of Uyo, Uyo, Akwa Ibom State, Nigeria
Bassey Annie Etuk, Department of Chemistry, Faculty of Science, University of Uyo, Uyo, Akwa Ibom State, Nigeria
Essien Daniel Udosen, Department of Chemistry, Faculty of Science, University of Uyo, Uyo, Akwa Ibom State, Nigeria
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This study sought to assess ecological risk of Polycyclic aromatic hydrocarbons (PAHs) in sediments collected from Qua Iboe River Estuary (QIRE).Sediment samples were collected from five stations and a control station along the estuary in the dry and wet seasons. PAHs in sediments were measured using gas chromatography coupled with a flame ionisation detector (GC/FID), and ecological risk on benthic organisms exposed to PAHs in sediment were evaluated using threshold effect concentration hazard quotient (TEC-HQ) and mean effect range median quotient (m –ERM-q) method prescribed by USEPA. The concentration of high molecular weight PAHs (HMW-PAHs) in the dry season ranged from1.225E-03 to 1.328E-01 whereas during the wet season it ranged from 2.420E-03 to 7.690E-02. The were no significant differences (P<0.05) between the PAH levels for the wet and dry seasons.The results for the TEC-HQ and m –ERM-q values of HMW-PAHs for both seasons were less than the threshold values of 1 and 0.1, respectively. Hence, exposure to PAHs in sediments from QIRE may not pose any adverse biological effect on benthic organisms. However, regular monitoring of the level of HMW-PAHs in the sediment within QIRE is advocated to avoid bioaccumulation of organic pollutants.
Polycyclic Aromatic Hydrocarbons, Ecological Risks, Qua Iboe River Estuary, Sediments
To cite this article
Eno Anietie Moses, Bassey Annie Etuk, Essien Daniel Udosen, Ecological Risk Assessment of High Molecular Weight Polycyclic Aromatic Hydrocarbons in Sediments from Qua Iboe River Estuary, South-South, Nigeria, International Journal of Ecotoxicology and Ecobiology. Vol. 1, No. 3, 2016, pp. 76-81. doi: 10.11648/j.ijee.20160103.13
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This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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