Catalytic activity of metals in heterogeneous Fenton-like oxidation of wastewater contaminants: a review

Abstract Innovations in water technology are needed to solve challenges of climate change, resource shortages, emerging contaminants, urbanization, sustainable development and demographic changes. In particular, conventional techniques wastewater treatment limited by the presence poorly biodegradable organic matter. Alternatively, recent Fenton, Fenton-like hybrid processes appear successful for cleaning different types liquid wastewaters. Here, we review application metallic catalyst-H 2 O systems heterogeneous Fenton process. Each system has unique redox properties due metal oxidation state. Solution pH is a major influencing factor. Catalysts made iron cerium form stable complexes with products H , thus resulting reduced activities. Copper forms transitory products, but copper catalytic activity restored during reaction. Silver manganese do not complexes. The catalyst performance degradation mineralization decreases order: manganese, copper, iron, silver, cerium, yet easiness practical cerium.