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    STUDIA CHEMIA - Ediţia nr.1 din 2003  
         
  Articol:   AN INVESTIGATION INTO THE CU, PB AND ZN POLLUTION OF THE SOMES AND LAPUS RIVERS OF BAIA-MARE AREA, ROMANIA.

Autori:  MICHAELA PONTA, FRENÅ¢IU TIBERIU, CHRISTOPHER MCCORMICK, CECILIA ROMAN, EMIL CORDOÅž. 		 
       
         
  Rezumat:  An evaluation of Cu, Pb and Zn in sediment and water collected in the catchment of the Somes river one year and a half after the cyanide spill accident in January 2000 is presented. The sediments show a high content of heavy metals in the range (mg Kg-1): 8.9 – 339 (Cu); 59 – 465 (Pb) and 56 – 2060 (Zn) that demonstrate their potential toxicity for the ecosystem. As compared to data recorded after the accident, the content of heavy metals decreased at the station near the place of cyanide spill and increased downstream. Copper exceeds the admissible level in water near the place of cyanide spill (0.070 mg L-1), while Pb is below the admissible level. The high concentration of Zn up to 1.038 mg L-1 in water can not be attributed exclusively to the pollution but is also due to natural background. The situation in the investigated period is better than that after the accident, when Cu and Zn exceeded up to 10 and 68 times, respectively the permissible limits.  
         
     
         
         
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