In theso-calledphotocatalyticozonation(PO)synergisticeffectsbetweenphotocatalysisandozonation enhance therateofoxidationoforganiccompounds,thereforethisintegratedprocessisverypromising for useinwatertreatment.Inthepresentwork,itisdemonstratedthattheimprovementthatcanbe obtained bytheintegratedprocessincomparisonwiththeuncoupledprocessesdependsontherelative weight between photocatalysis and ozonation. In this respect, it has been found that a relatively low rate of photocatalysis (0.3 times the rate of ozonation)issufficienttogetthehighestsynergyandtomaximize the performancesintheoxidationofformate,theadoptedmodelorganiccompound.Thebenefitsof the couplingofphotocatalysistoozonationarenotlimitedtotheincreaseoftheoxidationrate,but include alsothecontroloftheozonationby-productofmainconcern(bromate).TheeffectofthepH,of the presenceofoxidizableorganiccompounds,ofthepresenceofnitrogenontheformationoronthe reduction ofbromateareexperimentallystudiedanddiscussed.Theobtainedresultshaverelevancefor the practicalapplicationsofPO,sinceonthesebasesitispossibletoidentifyproperoperatingconditions.
Parrino, F., Camera-Roda, G., Loddo, V., Palmisano, L., Augugliaro, V. (2014). Photocatalytic ozonation:Maximization of the reaction rate and control of undesired by-products. APPLIED CATALYSIS. B, ENVIRONMENTAL, 178(178), 37-43 [dx.doi.org/10.1016/j.apcatb.2014.10.081].
Photocatalytic ozonation:Maximization of the reaction rate and control of undesired by-products
PARRINO, Francesco;LODDO, Vittorio;PALMISANO, Leonardo;AUGUGLIARO, Vincenzo
2014-01-01
Abstract
In theso-calledphotocatalyticozonation(PO)synergisticeffectsbetweenphotocatalysisandozonation enhance therateofoxidationoforganiccompounds,thereforethisintegratedprocessisverypromising for useinwatertreatment.Inthepresentwork,itisdemonstratedthattheimprovementthatcanbe obtained bytheintegratedprocessincomparisonwiththeuncoupledprocessesdependsontherelative weight between photocatalysis and ozonation. In this respect, it has been found that a relatively low rate of photocatalysis (0.3 times the rate of ozonation)issufficienttogetthehighestsynergyandtomaximize the performancesintheoxidationofformate,theadoptedmodelorganiccompound.Thebenefitsof the couplingofphotocatalysistoozonationarenotlimitedtotheincreaseoftheoxidationrate,but include alsothecontroloftheozonationby-productofmainconcern(bromate).TheeffectofthepH,of the presenceofoxidizableorganiccompounds,ofthepresenceofnitrogenontheformationoronthe reduction ofbromateareexperimentallystudiedanddiscussed.Theobtainedresultshaverelevancefor the practicalapplicationsofPO,sinceonthesebasesitispossibletoidentifyproperoperatingconditions.
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