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    STUDIA CHEMIA - Ediţia nr.2 din 2009  
         
  Articol:   THE STUDY OF HEAVY METALS TRANSFER FACTORS ON DIFFERENT TYPES OF AQUATIC VEGETATION.

Autori:  LILIANA TEODOROF, CRISTINA NASTASE, IRINA ANUTI. 		 
       
         
  Rezumat:   In this study, there were selected two sample types: sediments and three types of aquatic vegetation from Danube Delta Biosphere Reserve: Scirpo- Phragmitetum, Typha angustofila and Stratiotetum aloides. The samples were taken during 2008, from may to august. For the aquatic vegetations the humidity, the total carbon and the heavy metals (Cd, Mn, Ni, Pb, Zn) concentrations in the dry samples were measured. For the sediments the heavy metals concentrations were measured. Accumulation factor ratios of aquatic vegetations were calculated, and the three species were compared. The bioaccumulation ratios of S. aloides were higher comparing with T. angustofila and S. phragmitetum for nickel, lead and manganese. The study of the humidity and total organic carbon proves the fact that the T. angustofila is an important viable source of biocombustible (minimum humidity, maximum content of carbon), than S. phragmitetum (medium humidity, medium content of carbon) and S. aloides (maximum humidity and minimum content of carbon).

Keywords: heavy metals, total carbon, humidity, Scirpo-Phragmitetum, S. aloides , T. angustofila, Danube Delta 		 
         
     
         
         
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