Evaluation of Selected Heavy Metal Concentration of Soil Along Some Highways in Imo State, Nigeria
This study evaluated the concentration of selected heavy metals (Pb, As, Zn, Cu, Hg) in soils along two major highways, Owerri–Aba and Owerri–Okigwe, and a non-highway control site at Egbeada in Imo State, Nigeria. Soil samples were collected at depths of 0–15 cm and 15–30 cm, and at distances of 0–50 m and 50–100 m from the road. Laboratory analyses were conducted at the Soil Science Departmen...