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    STUDIA CHEMIA - Ediţia nr.Special Issue 1 din 2009  
         
  Articol:   ELECTROCHEMICAL REDUCTION-ADSORPTION PROCEDURE FOR THE REMOVAL OF NITROPHENOL CONTAMINANTS FROM AQUEOUS MEDIA.

Autori:  MIHAELA-CLAUDIA TERTIŞ, MARIA JITARU, VIRGINIA COMAN, MIUŢA FILIP, DANIEL A. LOWY. 		 
       
         
  Rezumat:  Work reported here was performed with the goal of reducing the concentration of 4-nitrophenol (4-NP) and 2,6-dinitrophenol (2,6-DNP), present in synthetic solutions to values below 0.5 mg L-1, the maximum concentration level tolerated by international environmental regulations [1, 2]. In the electrochemical reduction of 4-NP the final product was 4-aminophenol, as assessed by HPLC. Three methods were used for decreasing 4-NP and 2,6-DNP concentrations: electrochemical reduction, adsorption on active carbon, and the combined electrochemical reduction-adsorption. Best results were obtained by applying the combined procedure, which employed as the cathode granular activated carbon in fluidized bed. In these experiments 95-97% removal of 4-NP and 2,6-DNP from solutions occurred within the first 20 min.

Keywords: nitrophenol removal, electrochemical reduction, removal by adsorption, activated carbon, fluidized bed cathode.
  
         
     
         
         
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