Characterization of plasma-induced phenol advanced oxidation process in a DBD reactor
Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy
2 Dipartimento di Ingegneria Elettrica, Università degli Studi di Padova, via Gradenigo 6, 35131 Padova, Italy
Revised: 2 April 2011
Accepted: 4 April 2011
Published online: 21 July 2011
Using phenol as a model organic pollutant we studied and characterized an innovative advanced oxidation process in water using a prototype dielectric barrier discharge (DBD) reactor in which electrical discharges are produced in the air above the water surface. Phenol is decomposed quite efficiently in this reactor operated at room temperature and atmospheric pressure. The process selectivity to form CO2 is, however, to be improved since a large fraction of the treated organic carbon is unaccounted for. The rate of phenol conversion increases linearly with the reciprocal of the pollutant initial concentration, suggesting the operation of a mechanism of inhibition by products as found earlier for oxidation of volatile organic pollutants in air plasmas.
© EDP Sciences, 2011