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    STUDIA CHEMIA - Issue no. 3, Tom II / 2016  
         
  Article:   THE EVALUATION OF THE METAL CONTAMINATION OF DRINKING WATER SOURCES FROM MEDIAS TOWN, ROMANIA USING THE METAL POLLUTION INDICES.

Authors:  CECILIA ROMAN, DUMITRU RISTOIU.
 
       
         
  Abstract:  Drinking water represents a direct source for the toxic and persistent metals entrance in the organisms. Their bioaccumulation makes them harmful for living organisms, including humans. Assessing the quality of the drinking water sources represents a significant prevention and protection measure. Quality assessment methods such as heavy metal pollution index, degree of contamination and heavy metal evaluation index are applied worldwide. The aim of current study was to evaluate the metal contamination of drinking water sources from Medias town using the pollution and quality assessment indices. The concentrations of As, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn were assessed in 21 drinking water sources (19 well waters and 2 public springs). Results indicate Mn and Cd concentrations exceeding the threshold limits of the drinking water quality guidelines, only in summer season, in three samples. In the spring season the regulatory limits were not exceeded. The quality assessment indices show low contamination degree, all values being lower than the critical ones. Positive correlations were observed between pollution indices, As, Cd, Mn, Zn, Ni and Cu concentrations.

Keywords: drinking water sources, contamination index (Cd), heavy metal evaluation index (HEI), heavy metal pollution index (HPI)
 
         
     
         
         
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