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ASSESSMENT OF HEAVY METALS CONTAMINATION IN RICE AT DADINKOWA DAM BASIN GOMBE STATE

Heavy metals accumulations at Dam basin originated from mining sites through erosion and water transportations find themselves in a soil, water bodies and plants contaminated soil through their roots and those that settle on the plants get in to the plants and animals organs. This study explored the concentration of these heavy metals levels present in rice grown at vicinity of the Dam, which were compared with their [1] maximum recommendation levels safer for human ingesting. Some proximate analysis of the rice investigated showed mean crude fiber = 0.82%, crude fats = 2.81%, and crude protein = 1.12%. Atomic Absorption Spectroscopy was adopted for the determination of the heavy metals concentrations showed Fe =0.00670 mg/kg; Zn= 0.0065402 mg/kg then Ni = 0.006224 mg/kg. Others Cd =0.005308 mg/kg, Pb = 0.005254 mg/kg, Mn = 0.001212 kg/mg, Co = 0.0010084 mg/kg, As = 0.0000665 mg/kg, Cu = 0.0000696 mg/kg, Se = 0.0000042 mg/kg. Their concentrations were expressed in decreasing order of Fe > Zn > Ni > Cd > Pb > Mn > Co > As > Cu > Se respectively. The result obtained showed all the heavy metals were within the value of 0.001- 0.005 mg/kg except Zn and Ni. Thus rice grown at Dadinkowa dam basin were only contaminated with excess Zn and Ni high concentrations. Constant utilization of rice grown there can be harmful to health of humans and the ecosystem