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    STUDIA CHEMIA - Ediţia nr.2 din 2021  
         
  Articol:   REMOVAL OF RHODAMINE FROM AQUEOUS SOLUTIONS USING NATURAL ZEOLITE.

Autori:  LACRIMIOARA SENILA, EMILIA NEAG, DANIELA ALEXANDRA SCURTU, OANA CADAR, ANCA BECZE, CALIN HOREA TOMOIAG, MARIN SENILA.
 
       
         
  Rezumat:  
DOI: 10.24193/subbchem.2021.2.15

Published Online: 2021-06-30
Published Print: 2021-06-30
pp.171-180


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ABSTRACT: The aim of this study was to evaluate the adsorption of rhodamine B (RB) from synthetic water using natural zeolites from Romania. The adsorption capacity of zeolite for RB removal was improved by heat treatment at 200, 400 and 600 °C. The chemical and structural characterization of untreated and thermally treated zeolites was performed using advanced techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis. The adsorption behavior of RB on activated zeolites was studied using Langmuir, Freundlich and Dubinin-Radushkevich isotherms. The thermally treated zeolite at 200°C gave the highest adsorption efficiency (97.9%) for RB adsorption from aqueous solutions. According to the obtained results, it can be concluded that thermally treated zeolite can be used as an effective adsorbent for the removal of RB from wastewater.

Key words: zeolites, rhodamine B, thermal activation
 
         
     
         
         
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