title: The roles of ozone and zeolite on reactive dye degradation in electrical discharge reactors.
abstract: In this study high voltage pulsed corona electrical discharge advanced oxidation processes (AOPs) were applied to bleach and degrade C.I. Reactive Green 8 and C.I. Reactive Red 45 organic dyes in water solutions. Two types of hybrid gas/liquid high voltage electrical discharge (corona) reactors, known as hybrid series and hybrid parallel were studied. The difference between these reactors relates to electrode configuration, which affects the amounts of ozone, hydrogen peroxide and hydroxyl radicals produced. Experiments were conducted using dye concentrations of 20 mgl(-1) and 75 mgl(-1), with and without NH4ZSM5 zeolite addition in order to determine possible effects of added solid particles to total process efficiency. The role of ozone in combination with zeolites was assessed through comparative direct ozonation experiments with ozone supplied by an ozone generator. UV/VIS spectrophotometric measurements and measurements of total organic carbon (TOC) were used for the determination of decolorization and mineralization rates.
authors.affiliation: Faculty of Chemical Engineering and Technology, University of Zagreb, Marulicev trg 19, Zagreb 10000, Croatia.
authors.forename: L
authors.initials: L
authors.lastname: Peternel
authors.forename: H
authors.initials: H
authors.lastname: Kusic
authors.forename: N
authors.initials: N
authors.lastname: Koprivanac
authors.forename: B R
authors.initials: BR
authors.lastname: Locke
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D004560:Electricity; D006861:Hydrogen Peroxide / Q000737:chemistry; D017665:Hydroxyl Radical / Q000737:chemistry; D010126:Ozone / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017641:Zeolites / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D017641:Zeolites; D017665:Hydroxyl Radical; D010126:Ozone; D006861:Hydrogen Peroxide