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    STUDIA CHEMIA - Issue no. 2 / 2006  
         
  Article:   REMOVAL OF SOME HEAVY METAL IONS FROM SYNTHETIC WASTEWATERS USING NATURAL ZEOLITES. A COMPARATIVE STUDY.

Authors:  MARIA STANCA, ANDRADA MĂICĂNEANU, SILVIA BURCĂ, HOREA BEDELEAN. 		 
       
         
  Abstract:  This paper presents some results obtained for removal of lead (II), zinc(II) and iron (II) ions from wastewaters by ionic exchange on natural zeolites from Transilvania. We used zeolitic (clinoptilolitic) volcanic tuffs from Măcicaş (M), Pâglişa (P) and Cepari Vultureni (CV) areas (Cluj county). The experiments were conducted in a batch reactor (static regime) and in a fixed bed column (dynamic regime). The efficiency of removal is high for all the natural zeolites and ions considered. A pretreatment of the zeolite with Na+ solutions increased the efficiency of the ionic exchange process.  
         
     
         
         
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