Pollution Load of Heavy Metals in Ilupeju, Ikeja and Isolo Industrial Wastewaters and Seasonal Impacts on Quality of Water Downstream and Upstream in Lagos Metropolis

Abstract

Profiles of heavy metals in Ilupeju, Ikeja and Isolo industrial wastewaters and seasonal impacts on quality of water downstream and upstream in Lagos metropolis were determined. Wastewater samples from industrial estate were collected at the point of discharge of effluents into the streams and at spatial interval of 50 to 200 meters upstream and downstream of the discharge point over a two- year period (2005-2007) .The effluents were analyzed for heavy metals using standard methods. At the point of wastewater discharge into water bodies, during dry and rainy seasons, only Manganese showed significant difference (p