Clay, Zeolite and Oxide Minerals: Natural Catalytic Materials for the Ozonation of Organic Pollutants

N INCHAURRONDO; J. FONT

MOLECULES

MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL-MDPI

Lugar: Basel; Año: 2022

1420-3049

Abstract: Ozone has been successfully employed in water treatment due to its ability to oxidize awide variety of refractory compounds. In order to increase the process efficiency and optimize itseconomy, the implementation of heterogeneous catalysts has been encouraged. In this context, theuse of cheap and widely available natural materials is a promising option that would promote theutilization of ozone in a cost-effective water treatment process. This review describes the use ofnatural clays, zeolites and oxides as supports or active catalysts in the ozonation process, with emphasis on the structural characteristics and modifications performed in the raw natural materials;the catalytic oxidation mechanism; effect of the operating parameters and degradation efficiencyoutcomes. According to the information compiled, more research in realistic scenarios is needed(i.e., real wastewater matrix or continuous operation in pilot scale) in order to transfer this technology to the treatment of real wastewater streams.