An innovative ultrasound, Fe2+ and TiO2 photoassisted process for bisphenol a mineralization

作者：Torres Palma Ricardo A; Nieto Jessica I; Combet Evelyne; Petrier Christian; Pulgarin Cesar^*

来源：Water Research, 2010, 44(7): 2245-2252.

DOI：10.1016/j.watres.2009.12.050

• Sonochemical degradation
• Photocatalysis
• Photo-Fenton
• Sonophotocatalysis
• Endocrine-disrupting chemical
• Bisphenol A elimination
• Water treatment
• Advanced oxidation

This paper explores the degradation of a model pollutant, bisphenol A, by an advanced oxidation process that combines sonolysis, Fe2+, and TiO2 in a photoassisted process. Experiments were done under saturated oxygen conditions. The effect of different Fe2+ (0.56 and 5.6 mg/L) and TiO2 (10 and 50 mg/L) concentrations was investigated on both the elimination and mineralization of the pollutant. A pronounced synergistic effect that led to the complete and rapid elimination of dissolved organic carbon (DOC) was observed even at low catalyst loadings. In this system, almost a complete removal of DOC (93%) was observed after 4 h using 10 and 5.6 mg/L of TiO2 and Fe2+, respectively, whereas at the same time, only 5, 6, and 22% of DOC was removed by an individual process alone (TiO2 photocatalysis, ultrasound, and photo-Fenton, respectively). In this system, ultrasound has the principal role of eliminating the initial substrate and providing hydrogen peroxide for the photocatalytic systems, while photo-Fenton and TiO2 photocatalysis are mainly responsible for the transformation of the intermediates in CO2 and H2O. The role of H2O2 generated from the sonochemical process is also discussed.

• 出版日期2010-4