Evaluation of Trace Metals in Water and Fish Meat, from Lake Nubia and Khartoum City, Sudan

The purpose of this work was to investigate the concentrations of some heavy metals, cadmium, nickel and lead, in two commercial fish species (Oreochromis niloticus and Bagrus bayad) procured from River Nile and Nubia Lake fisheries sites, during the period of time from May 2015 to January 2016. Desired fish and water samples from every species and water were randomly gathered via occasionally from the two fisheries production sites. In order to perform those three heavy metals level by utilizing atomic absorption spectroscopy (AAS(. The results of concentrations of heavy metals in fish flesh were revealed a significantly differences (P˂ 0.01). The concentration level of Ni, Pb were detected a higher in fish flesh of Bagrus bayad of Nubia Lake than the Oreochromis niloticus. Likewise level of Cd demonstrated the highest value in Oreochromis niloticus only. Heavy metals contents in water samples at various sites were demonstrated that the most note worthy concentration of Pb in Nile River (Khartoum city), which was (0.056 ppm) as significantly higher than that (0.042ppm) from Lake Nubia tests. The level of Cd and Ni were (0.011, 0.027ppm) in Nile River (Khartoum city) and (0.005 and 0.015ppm) in Lake Nubia, there were no significant diverse between them. Overall results showed none of the trace metals examined at both studied sites and fish flesh was over the prescribed admissible level showed by FAO/WHO and EC Committees.