Combination of ozonation and photocatalysis for purification of aqueous effluents containing formic acid as probe pollutant and bromide ion
- Autori: Parrino, F.; Camera-Roda, G.; Loddo, V.; Palmisano, G.; Augugliaro, V.
- Anno di pubblicazione: 2014
- Tipologia: Articolo in rivista (Articolo in rivista)
- Parole Chiave: Advanced oxidation processes; Bromate; Ozonation; Photocatalysis; Photocatalytic ozonation; Water purification; Bromates; Bromides; Catalysis; Formates; Ions; Kinetics; Oxidation-Reduction; Ozone; Time Factors; Water Pollutants, Chemical; Ultraviolet Rays; Waste Disposal, Fluid; Water Purification; Water Science and Technology; Waste Management and Disposal; Pollution; Ecological Modeling
- OA Link: http://hdl.handle.net/10447/151027
Abstract
The treatment by advanced oxidation processes (AOPs) of waters contaminated by organic pollutants and containing also innocuous bromide ions may generate bromate ions as a co-product. In the present work heterogeneous photocatalysis and ozonation have individually been applied and in combination (integrated process) to degrade the organic compounds in water containing also bromide anions. The results show that: i) the sole photocatalysis does not produce bromate ions and in the case of its presence, it is able to reduce bromate to innocuous bromide ions; ii) the integration of photocatalysis and ozonation synergistically enhances the oxidation capabilities; and iii) in the integrated process bromate ions are not produced as long as some oxidizable organics are present. © 2013 Elsevier Ltd.