Distribution of Heavy Metals in Sediments of Selected Streams in Ibadan Metropolis, Nigeria
Author(s)- Ladigbolu, I.A, Balogun, K.J
The concentration of Zinc (Zn), Copper (Cu), Nickel (Ni), Cadmium (Cd), Lead (Pb), Chromium (Cr) and Colbalt (Co) were determined in the five major streams sediment of Ibadan city; Odo-ona (S-1),Ogunpa (S-2),Ogbere (S-3),Kudeti (S-4) and Gege (S-5) to investigate consequences of population growth, urbanization, agricultural activities and uncontrolled direct dumping of wastes and sewages into aquatic environment. The order of the concentration of most of these studied metals in all the streams sediments were found to be Gege>Ogunpa>Kudeti>Ogbere>Odo-ona. This is clear indication of effect of population growth, urbanization, agricultural activities, traffic congestion of Automobile and indiscriminate dumping of domestic waste and sewage into the aquatic environment.
The highest mean total concentration of all studied trace metals Zn (429.1μg/g), Cu(249.5μg/g), Ni(15.30μg/g), Cd(2.02μg/g), Pb(405.0μg/g), and Cr(67.4μg/g) were observed in Gege stream sediment(S-5) while that of Co was observed in Ogunpa stream sediment(S-2).There was no significant difference (p>0.01) in the distribution of Zn, Cr and Co in all the streams studied but significant difference (p<0.01) were observed in the distribution of Cu, Ni, Cd and Pb in all the streams sediment studied. Heavy metal concentration for all studied sediments showed a high level of pollution in comparism to GESAMP, 1982, Solomon and Forstner, 1984 and Prater and Anderson, 1977