ECOLOGICAL RISK OF CHEMICAL FRACTIONATION OF HEAVY METALS IN SEDIMENTS FROM OGBA RIVER, BENIN CITY, NIGERIA

Abstract Heavy metals have been recognized worldwide for their toxic effects in man and wildlife. The Ogba River in Benin City, Nigeria, has been reported to be contaminated to varied levels by heavy metals as a result of anthropogenic impact. However, there is paucity of scientific data on the chemical fractionation of such metals in […]