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    STUDIA BIOLOGIA - Issue no. 1 / 2002  
         
  Article:   ACCUMULATION OF SOME HEAVY METALS FROM MINE SPOILS.

Authors:  SILVIA ONAC, MIHAI TRIFU.
 
       
         
  Abstract:  The accumulation of Zn, Pb, Cu and Cd from mine spoils in Cavnic (Baia Mare mining area, Romania) by two soybean (Glycine max) cultivars, Agat and Diamant, was studied under field conditions. Three experimental variants were organised: V1 control (unpolluted soil), V2 50% spoils+50% unpolluted soil, V3 100% spoils. The heavy metal concentrations in the cultivation substrata, as well as in soybean leaves and roots were measured. As compared to the control, the heavy metal concentrations in spoils increased as follows: Cd>Zn>Pb>Cu. The translocation of heavy metals (% of the total amount in the cultivation substrata) to soybean leaves followed the order: Zn>Cd>Cu>Pb. In all the experimental variants, the amount of Cu, Cd and Pb translocated to the leaves of the Agat and Diamant soybean cultivars ranged between the normal values, whereas Zn accumulation exceeded these values in both soybean cultivar plants grown in the variants with spoils. Reported to the total metal concentrations in the cultivation substrata and to the total amount of heavy metals absorbed by soybean plants, the percentage of the metals translocated to the leaves decreased, except for Pb in 100% spoils. With few exceptions, in all the experimental variants the Diamant cultivar plants accumulated higher amounts of heavy metals in their roots and leaves than did the Agat cultivar plants.  
         
     
         
         
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