Efficiency of edta on zn and cu phytoremediation

الملخص EN

Phytoextraction of heavy metal from contami-nated soils is promising remediation technology.

In the present study, hyper-accumulator plants, indian mustard (Brassica juncea.( L) czern) and ryegrass (Lolium multiflorum Lam) have been used to remove the excess undesirable concentrations of zinc and copper from contaminated soil.

Zinc and copper uptake have been enhanced by adding EDTA to the contaminated soil using two concen-trations (2.5 and 7.5 mmol/Kg soil).

Accumulation of Zn by the indian mustard shoots and roots under the effect of EDTA recorded 4 to 6 times as ad-sorbed by the control while less enhancement of Zn uptake was recorded by the ryegrass shoots and roots.

On the other hand, Cu accumulation showed significant enhancing by the ryegrass shoot comparing to the indian mustard shoot at the both employed EDTA concentrations.

The ryegrass roots gave enhanced Cu uptake at the EDTA conc.

7.5 mmol/Kg soil only while the indian mustard roots recorded an increasing in the Cu-uptake with the two EDTA concentrations.