Evaluation de la biodisponibilité des contaminants dans les sols

Abstract

The present work is to assess the degree of contamination and metal contamination such as: Pb, Zn, Ni, Cu, Cd, Cr, and Co in agricultural soils (cultivated and uncultivated) located in Hmadna and El Matmar (Rhelizan). The results of soil science of soils showed that all four land plots have a clay texture, with a slightly basic pH (main characteristic of calcareous soils and saline soils). The rates of limestone, between 17.12 to 18.82%, are homogeneous in plots with a cation exchange capacity (CEC) average between 25.75 to 32.1%. The presences of these metals in the samples were analyzed after being put into solution using the atomic absorption spectrophotometer from Perkin Elmer mark (PinAAcle 900H). The results show that the soil samples of Zn and Cd in values greater than the recommended values, while plants contain high levels of Zn, Cr, Ni, Cd, Cu and Pb.