6533b852fe1ef96bd12abc38

RESEARCH PRODUCT

Photocatalytic ozonation:Maximization of the reaction rate and control of undesired by-products

Francesco ParrinoVittorio LoddoLeonardo PalmisanoVincenzo AugugliaroG Camera Roda

subject

Settore ING-IND/24 - Principi Di Ingegneria ChimicaSettore CHIM/03 - Chimica Generale E InorganicaSettore ING-IND/25 - Impianti ChimiciPhotocatalysis Photocatalytic ozonation Ozone Bromate Process intensification

description

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.

yearjournalcountryeditionlanguage
2014-01-01
http://hdl.handle.net/10447/176191