Abstract
The study on concentrations of metal pollutants as an index of pollution in sediments and water samples of Porto-Novo Lagoon ecosystem was carried out for 12 months within two seasons (July-December 2014 and January-June 2015). Metal pollutants including Hg, Cd, Cu, Zn, Cr, Fe, Mn, Pd, Ni, Va, and Methyl mercury were investigated. This study employed the application of exploratory data analysis statistics, laboratory analysis and sampling techniques to reveal all tested metal pollutants and identify their sources. There is a significant difference in the metal pollutants in the sediments and water of Porto-Novo lagoon during rainy and dry seasons at 5% level of significance and correlation analysis showed that the mean concentration of metal pollutants in sediments and water were positive correlated values. The results proved that the sediments and water of Porto-Novo Lagoon are highly polluted with metal Pollutants, which might affect human health as well as the health of the ecosystem. National Priority List (NPL) on Porto-Novo Lagoon ecosystem is therefore, recommended for the revamping of the aquatic ecosystem.
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