Assessment of heavy metals concentrations in soil and siam weed

Abstract

Soils located at sites near road traffic and a waste dump site at Ibadan and leaf samples of Chromolaena odorata (Sian weed) at the sites were analsyed for Pb, Cd, Zn, Co, Ni, Cu and Fe. Average values (ppm) for the elements in the soils were Pb-28,87,Cd-4.31, Zn-27.02, Cr-5.19, Co- 4.30, Ni- 7.32, Cu- 15.13 and Fe-2213.00. The values were less than the critical values. Vehicular traffic and waste dumping tended to increase that presence of Pb, Cd, Zn, Co and Ni in soil and plant, and Fe in plant.

Nigerian Journal of Soil Science Vol. 17 2007: pp. 130-132