1 Ecotoxicology and Conservation Unit, Department of Zoology, Faculty of Science,University of Lagos, Lagos, Nigeria

2 Department of Marine Sciences, Faculty of Science, University of Lagos, Lagos,Lagos. Nigeria

3 Department of Chemistry, Faculty of Science, University of Lagos, Lagos, Nigeria


Polychlorinated biphenyls (PCBs) are a health risk for high trophic level predators and the Stockholm Convention requires measures to reduce or eliminate their release into the environment. The study was conducted an ecological survey on River Ogun, Lagos, Nigeria, quarterly over a period of two years (March 2013-February 2015). Water physicochemistry and the levels of nine PCB congeners were analyzed in water and sediment samples from five river zones: Agboyi, Maidan, Owode Elede, Kara, and Akute. Water physicochemistry showed significant (p<0.05) increases in conductivity, turbidity, temperature, salinity, total dissolved solids, and dissolved oxygen in the dry season compared to rainy season across the zones, while there was an increase in pH, transparency and depth in the rainy season across the zones. Mean temperature in the range of 28.53 -28.95°C, the mean pHranged between 5.58-7.74, mean total dissolved solid ranged between 0.67 -1.69 g/L, mean conductivity ranged between 0.77 mS/cm -0.94 mS/cm, mean salinity ranged between 0.05 -0.42%, mean turbidity ranged between 29.30-30.50NTU, mean Secchi-disc transparency ranged between 2.88-3.16m, mean depth ranged between 3.21-3.65m while meaning dissolved oxygen ranged between 14.54- 22.65mg/L.PCB congeners were analyzed in sediment and water samples. The analyzed categories were the IUPAC numbers: non-ortho PCBs (CBs 8, 18 and 58), mono-ortho PCBs (CBs 87, 128,170 and 195) and dl-PCBs(CBs 206 and 209). The mean concentrations of PCBs in the sediment samples for all zones ranged from 0.000078-0.01μg/kg, while the mean concentrations of PCBs in the water samples for all the sampled zones ranged from 0.00006-0.006mg/L. The total PCBs concentrations in all water samples in this study for the rainy and dry seasons were 0.0296 mg/Land 0.0299 mgL-1, respectively. The hazard quotient (HQ) values for the rainy season ranged from 0.0039 - 0.014 and between 0.0047 - 0.013571 for the dry season. The cancer risk for the rainy season ranged from 3.90 × 10-6 - 9.82 ×10-6, while that of the dry season ranged from 1.57× 10-7 - 3.17 × 10-7. There was no significant difference between the congeners when the samples were subjected to descriptive (mean and standard error) and analysis of variance statistics and P<0.05 was considered to indicate statistical significance. Means were separated using Bonferroni’s multiple comparison tests, p<0.05). PCB concentrations in all the zones were above US EPA limits in surface waters (0.0005 mg/L), which is a cause for environmental concern for River Ogun.


  1. Aguayo, S., Munoz., M.J., De la Torre, A., Roset, J., E .De la Pena and M. Carballo, 2004. Identification of organic compounds and ecotoxicological assessment of sewage treatment plants (STPs) effluents. Science Total Environment. 328:69-81.
  2. U.S. Environmental Protection Agency.2000.Guidance for assessing chemical contaminant data for use in fish advisories: Volume 1: Fish sampling and analysis, 3rd ed. Washington, DC: Office of Water. EPA 823-B-00-008.
  3. Grote, K., Niemann, L., Selzsam, B., Haider W., Gericke, C., M.Herzler and I. Chahoud, 2008. Epoxiconazole causes changes in testicular histology and sperm production in the Japanese Quail (Coturnix coturnix japonica). Environmental Toxicology and Chemistry. 27 (11): 2368-2374.
  4. Health Canada. Canadian handbook on health impact assessment. 2004. Vol. 1.The basics. Published by authority of the Minister of Health, Ottawa Canada.
  5. Wang, W.T., Simonich, S.M., Xue, M., Zhao J.Y, N. Zhang, and R. Wang, 2010.Concentrations, sources and spatial distribution of polycyclic aromatic hydrocarbons in soils from Beijing, Tianjin and surrounding areas, North China. Environ Pollut. 158:1245–51.
  6. Xu, M.X., Yan, J.H., Lu, S.Y., Li, X.D., Chen, T., Ni, M.J., Dai, H.F., F. Wang, and K.F. Cen,2009.Concentrations, profiles, and sources of atmospheric PCDD/Fs near a municipal solid waste incinerator in Eastern China. Environmental Science & Technology. 43(4):1023-1029.
  7. Erickson, M.D and R.G.Kaley, 2011.Applications of polychlorinated biphenyls. Environ. Sci.Pollut. Res. 18: 135–151.
  8. U.S. Environmental Protection Agency, USEPA, 1996.PCBs: Cancer dose-response assessment and application to environmental mixtures. Washington DC.
  9. Agency for Toxic Substances and Disease Registry (ATSDR), 2000.Toxicological Profile for Polychlorinated Biphenyls. U.S. Department of Health and Human Services. 1–758.
  10. Zhao, X., Zheng, M., Zhang, B. Zhang and W.Liu, 2006. Evidence for the transfer of polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans from soil into biota Science of the Total Environment. 368: 744–752.
  11. Totten, L.A., Stenchikov, G., Gigliotti, C.L., Nilesh L and S.J Eisenreich, 2006. Measurement and modeling of urban atmospheric PCB concentrations on a small (8 km) spatial scale. Atmospheric Environment. 40:7940–7952.
  12. Duan, J.J., Bauer, L.S., Abell, K.J., J.P. Lelito and R.Van Driesche, 2013. Establishment and abundance of Tetrastichus planipennisi (Hymenoptera: Eulophidae) in Michigan: potential for success in classical biocontrol of the invasive emerald ash borer (Coleoptera: Buprestidae). Journal of Economic Entomology.106 (3):1145-54.
  13. Dang, V.D., D.M. Walters and C.M. Lee, 2010. Transformation of chiral polychlorinated biphenyls (PCBs) in a stream food web. Environmental Science Technology. 44: 2836–2841.
  14. Li, Y.F., Harner, T., Liu, L., Zhang, Z., N.Q Ren and H. Jia, 2010. Polychlorinated biphenyls in global air and surface soil: distributions, air-soil exchange, and fractionation effect. Environ Sci Technol, 44(8):2784–90.
  15. Marie, Noël. 2013. Bioaccumulative Contaminants in Marine Mammals: Uptake and Effects. Ph.D. thesis.169 pp.
  16. Cousins, I.T and K.C. Jones, 1998.Air-soil exchange of semi-volatile organic compounds (SOCs) in the UK. Environ Pollut. 102:105–18.
  17. Motelay-Massei, A., Ollivon, D., Garban, B., Teil, M.J., M. Blanchard and M. Chevreuil, 2004. Distribution and spatial trends of PAHs and PCBs in soils in the Seine River basin, France. Chemosphere. Apr; 55(4):555-65.
  18. Schmid, D., Lederer, I., Munch, P., AM. Pichler and F. Allerber-ger, 2005.An outbreak of norovirus infection associated with contaminated flood water, Salzburg. Euro Surveil. l 10, E050616.3.
  19. Rodenburg, L.A., Guo, J., S. Du and G.J. Cavallo, 2010. Evidence for unique and ubiquitous environmental sources of 3, 30-dichlorobiphenyl (PCB 11). Environmental Science Technology.44: 2816–2821.
  20. Antunes, P., Viana, P., Vinhas, T., J. and Rivera E.M.S.M. Gaspar, 2012. Emission profiles of polychlorinated dibenzodioxins, polychlorinated dibenzofurans (PCDD/Fs), dioxin-like PCBs and hexachlorobenzene (HCB) from secondary metallurgy industries in Portugal. Chemosphere. 88(11): 1332-1339.
  21. Van der Oost, R., J. Beyer and N.P.E.Vermeulen 2003. Fish bioaccumulation and biomarkers in environmental risk assessment: a review. Environmental Toxicology and Pharmacology. 13: 57-149.
  22. Ministry of the Environment, (MOE). 2009, Ambient Water Quality Criteria for Polychlorinated Biphenyl (PCBs [Online]:
  23. Beyer, A and M. Biziuk, 2009. Environmental fate and global distribution of polychlorinated biphenyls. Rev. Environ. Contam. Toxicol. 201:137–158.
  24. Federal Environmental Protection Agency, Lagos, 1991a. FEPA. Guidelines and Standards for Environmental Pollution Control in Nigeria.
  25. Mai, B.X., Zeng, EY., Luo, X.J., Yang, Q.S., Zhang, G., Li, X.D., G.Y Sheng and J.M. Fu, 2005. Abundances, depositional fluxes and homolog patterns of polychlorinated biphenyls in dated sediment cores from the Pearl River Delta, China. Environ. Sci. Technol. 39:49-56.
  26. Adeyemi, D., Ukpo, G., C, Anyakora and J. Uyimadu, 2009. Polychlorinated biphenyls in fish samples from Lagos lagoon Nigeria. African Journal of Biotechnology. 8(12):2811-2815.
  27. Ezemonye,  L.I.N. 2005. Polychlorinated biphenyls (PCBs) levels and distribution in Ethiope and Benin Rivers of the Niger Delta, Nigeria: surface water and sediments. International Journal of Environmental Studies.  62(5): 491-504.
  28. Osibanjo, O. and O. Bamgbose, 1990. Chlorinate Hydrocarbons in marine fish and shell fish of Nigeria. Marine Pollution Bulletin. 21:581-586.
  29. Nwankwo, D.I., Adesalu, T.A., Amako, C.C., S.C Akagha and J.D. Keyed, 2013. Temporal variations in water chemistry and chlorophyll-a at the Tomaro creek Lagos, Nigeria. Journal of Ecology and the Natural Environment. 5(7):144-151.
  30. The United States Environmental Protection Agency EPA, 2008 Method 1668B: Chlorinated Biphenyl congeners in water, soil, sediment, biosolids, and tissue by HRGC/HRMS. EPA-821-R-08–020. Washington (DC): Office of Water, Office of Science and Technology, Engineering and Analysis Division.
  31. Environmental Protection Agency (US), 1992. Guidelines for exposure assessment. Fed Regist. 29; 57(104):22888-938.
  32. Exposure factors sourcebook for European population (with a focus on UK data), 2001. Brussels, Belgium: European Centre for Ecotoxicology and Toxicology of Chemicals; Report No.: 79. 128 p.
  33. Risk assessment guidance for Superfund, 1989. Human health evaluation manual (Part A). Vol. I, Washington, D.C.: Environmental Protection Agency; 289 p.
  34. Guidelines for carcinogen risk assessment, 2005.Washington, D.C.: Environmental Protection Agency; 166 p.
  35. PCBS, 1996.Cancer dose-response assessment and application to environmental mixtures Washington, D.C.: Environmental Protection Agency; 83 p.
  36. Guidelines for drinking-water quality, 2011. 4th ed. Geneva, Switzerland: World Health Organization; 564 p.
  37. Anyakora, C., Ogbeche, A., P. Palmer and H. Coker, 2005. Determination of Polynuclear aromatic hydrocarbons in marine samples of Siokolo Fishing Settlement. J. Chroma. A. 1073: 323–330.
  38. Adeosun, F.I., Akin-Obasola, B.J., Jegede, T., F.B Oyekanmi and J.O. Kayode, 2014. Abundances, depositional fluxes, and homolog patterns of polychlorinated biphenyls in dated sediment cores from the Pearl River Delta. China. Environ. Sci. Technol. 39: 49–56.
  39. Anago, J., I.K. Esenowo and A.A.A. Ugwumba, 2013.The Physico-chemistry and Plankton Diversity of the Awba Reservoir University of Ibadan. Ibadan Nigeria Research Journal of Environmental and Earth Sciences. 5(11): 638-644.
  40. Wang, W., Wang, A., Chen, L., Y. Liu and R. Sun, 2002.Effects of pH on survival, phosphorus concentration, acetylate energy charge and Na (+)-K (+) ATPase activities of Penaeus chinensis Osbeck juveniles. Aquat Toxicol. 60: 75-83.
  41. Idowu, E.O and A.A.A. Ugwumba, 2005. Physical, chemical and benthic faunal characteristics of a southern Nigerian reservoir. The Zoologist. 3: 15-25.
  42. Ayoade, A.A, Fagade S.O, Adebisi A.A, 2006. Dynamics of limnological features of two man-made lakes in relation to fish production. Afr. J. Biotechnol.5(10): 1013-1021.
  43. Moore, R.D., G. Richards and A. Story, 2008. Electrical Conductivity as an Indicator of Water Chemistry and Hydrologic Process. Streamline Watershed Management Bulletin. 11: 2.
  44. Khan, R.F., Jadhav, M.J., Ustad I.R, 2012.Physicochemical Analysis of Triveni lake the water of Amravati district in (Ms) India. Bioscience. Discovery. 3: 64-66.
  45. Boyd, C.E. and F.R. Lichtkoppler, 1985.Water Quality Management in Pond Fish Culture. Research Development Service: 22 Auburn University Auburn Alabama.
  46. Verma, P., Chandawat, D., U. Gupta and H. Solanki, 2012. Water quality analysis of an organically polluted lake by investigating different physical and chemical parameters. Int J Res Chem Environ.2: 105-111.
  47. Das, A.K, N.P. Shrivastava, 2003. Ecology of Sarni Reservoir (M. P.) in the context of Fisheries. Poll Res. 22(4):533 – 539.
  48. Mariappan, P. and T. Vasudevan, 2002. Correlation of some physicochemical parameters of drinking water ponds in Eastern Parts of Sivagangai district, Tamil Nadu. Poll Res. 21(4):403-407.
  49. Suber, E.W. 1953. Biological effect of Pollution in Michigan Waters, Sew Industry. Wastes. 25:79 - 86.
  50. Ssebugere, P., Kiremire, BT., Henkelmann, B., Bernhöft, S., Wasswa, J., G.N Kasozi and K.W. Schramm, 2013. PCDD/Fs and dioxin-like PCBs in surface sediments from Lake Victoria, East Africa. The science of the Total Environment. 454-455: 528-33.
  51. Adebisi, A.A, 1981.The Physico-chemical properties and hydrology of tropical seasonal River-upper Ogun River. Hydrobiologia. 79: 157-165.
  52. American Public Health Association, APHA, 1992. Standard methods for the examination of water and wastewater 19th edition. 472pp.
  53. Ufodike, E.B.C., A.S Kwanasie and .L.A Chude, 1991.Volunteer Lake monitoring: EPA 440/4-91-002.U.S Government Protection Agency USEPA Washington DC, USA.
  54. Dagaonkar, A. and D.N. Saksena, 1992. Physico-chemical and biological characterization of a temple tank Kailasagar, Gwalior, Madhya Pradesh. Journal of Hydrobiology. 8:11-19.
  55. Ogunwenmo, C.A and K. Kusemiju, 2004. Annelids of a West African estuarine system. J. Environ. Biol. 25(2): 227 – 237.
  56. Deekay, S.N., J.F.N Abowei and O.J.F. Alfred, 2010. Seasonal variation of some physical and chemical parameters of Luubara creek, Ogoni land, Niger Delta, Nigeria. Research Journal of Environmental and Earth Science. 2: 208-215.
  57. Chagas, G.G. and M.S. Suzuki, 2005. Seasonal Hydrochemical Variation in a tropical Coastal Lagoon (Açu Lagoon, Brazil). Braz. J. Biol. 65(4): 597-607
  58. Beyer, A. and M. Biziuk, 2009. Environmental fate and global distribution of Polychlorinated biphenyls. Rev. Environ. Contam. Toxicol. 201: 137–158.
  59. Lohmann, R., Breivik, K., J. Dachs and D. Muir, 2007. The global fate of POPs: current and future research directions. Environ. Pollut..150: 150–165.
  60. Mai, B.X, Zeng, E.Y., Luo, X.J., Yang, Q.S., Zhang, G., Li, X.D., G.Y Sheng and J.M Fu, 2005.Abundances, depositional fluxes and homologue patterns of polychlorinated biphenyls in dated sediment cores from the Pearl River Delta, China. Environ. Sci. Technol. 39: 49-56
  61. Hien, P.T., Tue, N.M., Suzuki, G., Takahashi S and S. Tanabe, 2012.Polychlorinated biphenyls and polybrominated diphenyl ethers in fishes collected from Tam Giang-Cau Hai Lagoon, Vietnam. Interdisciplinary. Stud. Environ. Chem. Environ. Pollut. Ecotoxicol. 6: 221–227.
  62. Anyasi, R.O and H.L.Atagana, 2013. Biological remediation of polychlorinated biphenyls (PCB) in the environment by microorganisms and plants. Afr. J. Biotechnol. 10: 18916–18938.
  63. Passatore, L., Rossetti, S., A.A Juwarkar and A. Massacci, 2014. Phytoremediation and bioremediation of polychlorinated biphenyls (PCBs): State of knowledge and research perspectives. J. Hazard Mater. 278: 189–202.
  64. Okeniyia, S.O, Egwaikhideb, P.A., E.E Akporhonorc and I.E. Obazed, 2009. Distribution of organochlorine and Polychlorinated pesticide residue in water bodies of some rivers in Northern Nigeria. EJEAF Che. 8 (11): 1269-1274.
  65. Aina. O.A., Azubuike, V.C., Chukwunonso P.O and A .Augustine, 2016.Concentration of Polychlorinated biphenyls (PCB) Congeners in the muscle of Clarias gariepinus And Sediment from inland rivers of southwest Nigeria and estimated potential human Consequences. Journal of Toxicology and Environmental Health. Part A
  66. Amdany, R., Chimuka, L., Cukrowska, E., Kukučka, P., Kohoutek, Jiří., P .Tölgyessy and B.Vrana, 2014. “Assessment of bioavailable fraction of POPS in surface water bodies in Johannesburg City, South Africa, using passive samplers: an initial assessment,” Environmental Monitoring and Assessment, 186(9): 5639–5653, 
  67. National primary drinking water regulations. 2009. Washington, D.C.: Environmental Protection Agency; 6 p.
  68. Risk assessment guidance for Superfund. 2001. Vol. III: Part A, a process for conducting probabilistic risk assessment. Washington, D.C.: Environmental Protection Agency; 385 p.          
  69. Olayinka, O.O., Adedeji, H. O., A. A. Akinyemi and O. J Oresanya, 2017. Assessment of the Pollution Status of Eleyele Lake, Ibadan, Oyo State, Nigeria. Journal of Health & Pollution.7:15