Study of Contamination by Copper and Zinc of some Spontaneous Plant at Telamine Lake

Résumé

One of the major current issues in environment is soil contamination by many toxic elements and compounds including heavy metals. These contaminated sites, often have a very diverse flora tolerating high levels of heavy metals. The objective of this work is to study the behavior of some wild plants towards copper and zinc contamination and to test the hypothesis that the zinc (Zn) and copper (Cu) concentration may be explained by the availability in the soil and biomass of the organ. The obtained results showed that the metal concentration in plants is weakly correlated with its presence in soil. Our survey, in agreement with many previous studies, shows that there is no direct link between the total content of Cu and Zn in soil and concentration in plants. In fact, for an element to be assimilated by a plant, it must be in the soil solution and bioavailable. As this study also confirmed, absorption capacity vary according to plant species and, in a plant, according to the considered organ.

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