Determination of Bio-concentration Factor of Heavy metal from Soil to Onion around Mojo, Meki and Ziway area of Oromia Ethiopian

Abstract

This study was conducted on the transfer of heavy elements from soil to plant edible part is best described by considering the bio-concentration factor. The soil and onion sample were collected purposely and determined the concentrations of heavy metals (Fe, Cu, Zn,Mn, Cr, Cd, and Pb) mg/kg. The samples were extracted using wet digestion method and measured by with AAS. The result shows that all the results were below 1, that indicating the bio-concentration factors was high in soil relative to onion bulb. On the other word; BCF below 1.0 indicates high heavy metal concentration in soil in relation to levels in onion bulb.