Detection of concentrations of some heavy metals in two fresh water fish species at Wdi Halfa Fisheries, Sudan

Abstract EN

This study was undertaken to evaluate the detection of heavy metals in the fish lead (pb),cadmium (Cd)and chromium (Cr) in Two Spp of fish (Oreochromis nilotica) Bulti Spp and (Labeo niloticus ) Dabsa Spp in Nuba lake Wadi Halfa Northern State , as well as to correlate the detected elements with their respective concentrations with weight and length of the two fish Spp In Winter .10 samples Orechromis niloticus (Bulti spp) and other 10 samples of Labeo niloticu (Dabsa Spp.) were collected from the Nubian lake in Northern state in December 2016 in (Winter) and were analyzed to measure the concentrations (mg/Kg DW) Cadmium (Cd), Chromium (Cr) by atomic absorption spectrometry 210 / 211VG Atomic Absorption Spectrophotometer 3 Sudan Academy of Sciences (SAS), National Center for research.

.

The measured concentration of heavy metals in the present study was in order of, Cd, Cr and Pb The ranges of the measured concentrations Cd (mg/kg) in the10 samples of Oreochromis niloticus (Bulti Spp) samples were 0.065,0.057,0.035,0.032,0.017,0.056,0.021,0.045,0.062and0.066 for the Cr were 0.115,0.085,0.050,0.055,0.075,0.035,0.175,0.465,0.072and0.055 for Pb were 0.0315,0.130,0.175,0.165,0.160,0.150,0.375,0.485,0.195 and0.235 and for the Lbeo niloticus was as follows Cd 0.021,0.055,0.0285,0.058, ,0.076, 0.054,0.046,0.049,0.067 and 0.056 for the( Cr) were 0.260,0.075,0.080,0.095, ,0.065,0.095,0.220,0.072,0.090 and 0.070 and for Pb were 0.205,0.105, ,0.185,0.550,0.290,0.210,0.205,0.075,0.245and 0.160 which are all less than the permissible range .

The mean concentrations of, Cd, Cr,and Pb observed in the present study in Bulti were 0.0456,0.1152 and 0.2385 mg/kg respectively and for Dabsa were 0.0767,0.1122 and 0.2233 respectively Therefore, the study results revealed that the Nubian lake at Wadi halfa Northern state quality might be considered as not polluted with the these heavy metal.