Abstract
This study is aimed to determine the levels of Pb, Cd, Fe, Zn and Mn in four fish species from Lake Njuwa Yola Adamawa State using energy dispersive x-ray fluorescence (EDXRF) spectrophotometer. The concentration of heavy metals in both the flesh and head of the four fish species have higher values than the maximum permissible limits in fish by World Health Organization and Federal Environmental Protection Agent. The order of heavy metals concentration in the flesh of the four fish species were as follows: Tilapia zilli Fe > Zn > Mn > Cd; Synodontis ocellifer Fe > Zn > Mn > Cd; Clarias geriepinus Fe > Zn > Mn > Cd and Alestes baremose Fe > Zn > Cd > M. Similarly concentrations of heavy metals in the head of four fish species was observed in the order of Tilapia Zilli Fe > Zn > Mn > Cd; Synodontis ocellifer Fe > Zn > Cd > Mn; Claries geriepinus Fe > Zn > Mn > Cd and Alestes baremose Fe > Zn > Cd > Mn > Pb.
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