[Adekola, F.A. & Eletta O.A.A. (2007). A study of heavy metal pollution of Asa River, Ilorin, Nigeria; trace metal monitoring and geochemistry. Environ. Monit. Assess., 125, 157–163. DOI: 10.1007/s10661-006-9248-z.10.1007/s10661-006-9248-z17058013]Search in Google Scholar
[Akpor, O.B. & Munchie M. (2010). Remediation heavy metals in drinking water and waste water treatment systems: Processes and applications. International Journal of the Physical Sciences, 5(12), 1807−1817. http://www.academic-journals.org/IJPS]Search in Google Scholar
[Cempel, M. & Nikel G. (2006). Nickel: A review of its sources and environmental toxicology. Pol. J. Environ. Stud., 15(3), 375−382.]Search in Google Scholar
[Cheremisinoff, N.P. (2002). Handbook of water and wastewater treatment technologies. Massachusetts: Butterworth-Heinemann Ltd.]Search in Google Scholar
[Degrémont (2007). Water treatment handbook. Cedex: Lavoisier Publisher.]Search in Google Scholar
[Idowu, R.T., Inyang, N.M. & Ezenwaji H.M.G. (2004). Heavy metal concentrations in a west African Sahel reservoir. Animal Research International, 1(1), 12–15. DOI: 10.4314/ari.v1i1.40733.10.4314/ari.v1i1.40733]Search in Google Scholar
[Järup, L., Berglund, M., Elinder, C.G., Nordberg, G. & Vahter M. (1998). Health effects of cadmium exposure — a review of the literature and a risk estimate. Scand. J. Work Environ. Health, 24, 1–51. www.ncbi.nlm.nih.gov/pubmed/9569444.]Search in Google Scholar
[Järup, L. (2003). Hazards of heavy metal contamination. Br. Med. Bull., 68, 167–182. DOI: 10.1093/bmb/ldg032.10.1093/bmb/ldg03214757716]Search in Google Scholar
[Krishna, R., Fulekar, M.H. & Bhawana P. (2012). Rhizofiltration: A green technology for remediation of heavy metals. International Journal of Innovations in Bio-Sciences, 2(4), 193−199. http://parees.co.in/ijibs.htm.]Search in Google Scholar
[Le Cloirec, P. & Andrès Y. (2005). Bioremediation of heavy metals using microorganisms. In M. Fingerman & R. Nagabhushanam (Eds.), Bioremediation of aquatic and terrestrial ecosystems (pp. 97−140). Plymouth: Science Publishers.]Search in Google Scholar
[Martin, S. & Griswold P.G. (2009). Human health effects of heavy metals. Environmental Science and Technology Briefs for Citizens, 15, 1−6. http://www.engg.ksu.edu/CHSR/.]Search in Google Scholar
[Mohod, C.V. & Dhote J. (2013). Review of heavy metals in drinking water and their effect on human health. International Journal of Innovative Research in Science, Engineering and Technology, 2(7), 2992−2996. www.ijirset.com]Search in Google Scholar
[Mustapha, M.K. (2008). Assessment of the water quality of Oyun Reservoir Offa, Nigeria, using selected physico-chemical parameters. Turkish Journal of Fisheries and Aquatic Sciences, 8, 309−319.]Search in Google Scholar
[Mustapha, M.K. (2009a). Influence of watershed activities on the water quality and fish assemblages of a tropical African reservoir. Turkish Journal of Fisheries and Aquatic Sciences, 9, 01−08.]Search in Google Scholar
[Mustapha, M.K. (2009b). Phytoplankton assemblage of a small shallow tropical African reservoir. Rev. Biol. Trop., 57(4), 1009−1025. DOI: 10.15517/rbt.v57i4.5443.10.15517/rbt.v57i4.544320073331]Search in Google Scholar
[Mustapha, M.K. (2009c). Zooplankton assemblage of Oyun Reservoir, Offa, Nigeria. Rev. Biol. Trop., 57(4), 1027−1047. DOI: 10.15517/rbt.v57i4.5444.10.15517/rbt.v57i4.544420073332]Search in Google Scholar
[Mustapha, M.K. (2009d). Limnological evaluation of the fisheries potentials and productivity of a small shallow African reservoir. Rev. Biol. Trop., 57(4), 1093−1106. DOI: 10.15517/rbt.v57i4.5449.10.15517/rbt.v57i4.544920073337]Search in Google Scholar
[Mustapha, M.K. (2009e). Problems, challenges and management of small, shallow tropical African reservoirs – a case study of Oyun Reservoir, Offa, Nigeria. International Journal of Lakes and Rivers, 2(1), 163−174.]Search in Google Scholar
[Mustapha, M.K. (2009f). Conservation strategies for saving Barbus occidentalis, a declining fish species from Oyun Reservoir, Offa, Nigeria. American-Eurasian Journal of Sustainable Agriculture, 3(4), 658−662.10.15517/rbt.v57i4.5444]Search in Google Scholar
[Mustapha, M.K. (2010a). Application of biomanipulation in reducing high algal biomasss in eutrophicated shallow tropical African Reservoirs. Limnetica Internet, 4, 1−7. http://www.limnetica.org/internet/Mustapha_2010_biomanipulation.pdf]Search in Google Scholar
[Mustapha, M.K. (2010b). Seasonal influence of limnological variables on plankton dynamics of a small shallow, tropical African reservoir. Asian Journal of Experimental Biological Sciences, 1(1), 60−79. www.ajebs.com]Search in Google Scholar
[Mustapha, M.K. (2010c). Heterotis niloticus, a threatened Fish species in Oyun Reservoir, Offa, Nigeria. Asian Journal of Experimental Biological Sciences, 1(1), 1−7. www.ajebs.com]Search in Google Scholar
[Mustapha, M.K. (2010d). Fish fauna of Oyun Reservoir, Offa, Nigeria. Journal of Aquatic Sciences, 25(1), 106−114. http://journalofaquaticsciences.com/]Search in Google Scholar
[Mustapha, M.K. (2011). Perspectives in the limnology of shallow tropical African reservoirs in relation to their fish and fisheries. The Journal of Transdisciplinary Environmental Studies, 10(1), 16−23. http://www.journal-tes.dk/]Search in Google Scholar
[Nolte, J. (1988). Pollution source analysis of river water and sewage sludge. Environmental Technology Letters, 9, 857–868. DOI: 10.1080/09593338809384642.10.1080/09593338809384642]Search in Google Scholar
[Nriagu, J. (2007). Zinc deficiency in human health. http://www.extranet.elsevier.com/homepage_about/mrwd/nvrn/Zinc%20Deficiency%20in%20Humans.pdf]Search in Google Scholar
[Paz-Alberto, M.A. & Sigua G.C. (2013). Phytoremediation: A green technology to remove environmental pollutants. American Journal of Climate Change, 2, 71−86. DOI: 10.4236/ajcc.2013.21008.10.4236/ajcc.2013.21008]Search in Google Scholar
[Prasad, M.N.V. (2008). Trace elements as contaminants and nutrients: consequences in ecosystems and human health. New York: John Wiley and Sons Inc.10.1002/9780470370124]Search in Google Scholar
[Salem, H.M., Eweida, A.E. & Faraq A. (2000). Heavy metals in drinking water and their environmental impact on human health. In International Conference for Environmental Hazards Mitigation (pp. 542−556), September 2000, Cairo: University Egypt.]Search in Google Scholar
[Sanayei, Y., Ismail, N. & Talebi S.M. (2009). Determination of heavy metals in Zayandeh rood, Isfahan-Iran. World Applied Sciences Journal, 6(9), 1209−1214.]Search in Google Scholar
[Volesky, B. (1992). Removal of heavy metals by biosorption. In M.R. Ladisch & A. Bose (Eds.), Harnessing Biotechnology for the 21st Century. Washington: American Chemical Society.]Search in Google Scholar
[WHO (2011). Guidelines for drinking water quality. Geneva: World Health Organization.]Search in Google Scholar