The presence of some heavy metals in the sediments, water and Sarotherodon galileaus in llo-ldimu River, Ogun State, Nigeria

摘要

The Ilo-Idimu river is a river situated in the heavily industrialised part of Nigeria, with industries emptying their waste or part of their waste into the river. Also the community use the water of the river for domestic purposes such as cooking, drinking, bathing and washing. Iron (Fe) was the most abundant heavy metal amongst the four (Cu, Fe, Zn and Pb) heavy metals tested for in the Ilo-Idimu River. Though, the levels of lead was more in the littoral midstream (Lit B) and benthic upstream and downstream (Bent A and C) 1.60, 1.40 and 1.30 mg/L respectively. The fish samples of Sarotherodongalileaus tested for the four heavy metals showed that lead (Pb) was present only in the gut of the fish. Cu > Zn > Fe in the scale, in the flesh of the fish Cu > Fe > Zn, while Fe > Cu > Zn in the gills and gut of the fish. The levels of the heavy metals tested in the water and fish samples were lower than the WHO standards therefore, there is no immediate threat to the biodiversity of the aquatic species inthe river and to the health of the community using the water for various domestic uses.