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DICLOFENAC REMOVAL FROM AQUEOUS SOLUTIONS BY ELECTROOXIDATION AT BORON-DOPED DIAMOND (BDD) ELECTRODE
Autori: Monica Ihos
Data aparitiei: Iunie / 2015
Revista: Environmental Engineering and Management JournalVol. 14Nr. 6
ISSN: 1843 - 3707
Pret: 25.00 RON    
N.A.

Abstract
Diclofenac (DCF), which belongs to nonsteroidal anti-inflammatory drugs (NSAIDs), is a biorefractory micropollutant and its
removal from wastewaters has become strongly necessary. This paper dealt with the DCF removal from aqueous solutions by
electrooxidation at boron-doped diamond (BDD) electrode. In addition, the dual character of BDD electrode in electrochemical
degradation processes and their control was investigated. The electrooxidation process was assessed based on ultraviolet (UV)
spectra and total organic carbon (TOC) determinations in the electrolysed solutions. Also, the specific power consumption was
determined for various applied current densities (1 - 7.5 mA/cm2) and DCF concentrations (10 - 200 mg/L). Cyclic
voltammograms (CVs) recorded on BDD in the presence of DCF were used as analytical tool for the degradation process
characterisation. The peak currents recorded at +0.7 and +1 V/SCE allowed characterizing accurately DCF degradation process.
UV spectra, TOC removal and CV results proved that the BDD was highly effective in the DCF degradation and mineralization.
Thus, TOC removal of about 90% was obtained for all studied DCF concentrations.



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