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    STUDIA CHEMIA - Issue no. Special Issue 1 / 2009  
         
  Article:   DETECTION OF ELECTROACTIVE PRODUCTS RESULTED FROM ELECTROCHEMICAL NITRATE REDUCTION IN ALKALINE MEDIA.

Authors:  FLORICA IMRE-LUCACI, SORIN-AUREL DORNEANU, PETRU ILEA.
 
       
         
  Abstract:  Nowadays, the damage of the environment quality has reached alarming levels requiring severe measures for stopping this process. In order to harmonise with the maximum admitted concentrations of nitrate in the discharged effluents, the electrochemical procedures represent a clean, flexible and efficient alternative of decontamination. Electrochemical reduction of nitrate/nitrite (ERNN) can be advantageously applied to the treatment of industrial waste water, whereby this species can be transformed into harmless products. In this context, the present paper describes the results of our researches concerning the design of an original technique for on-line detection of electroactive products resulted from ERNN in alkaline media. The obtained results shows that, using an adequate pH value, at least three electroactive species generated from the NO3- reduction (NO2-, NH2-OH and NH4+) could be electrochemically detected at different applied potentials on the Pt-ring electrode.

Keywords: nitrate, nitrite, waste waters, electroactive products detection
 
         
     
         
         
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