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Application of an Fe-TAML/H2O2 system for rapid degradation of organic matter

Abstract:

Combining iron with the tetra-amido macrocyclic ligand (Fe-TAML) results in an efficient catalytic complex that, in the presence of an oxidant such as hydrogen peroxide (H<inf>2</inf>O<inf>2</inf>), efficiently promotes the degradation of organic pollutants via oxidants. To date, various synthesis methods have been employed, resulting in seven different Fe-TAML/H<inf>2</inf>O<inf>2</inf> compounds (i.e., generations) that have many applications. Nevertheless, the catalytic activity of each generation depends on the pH of the medium; while the first generation has been the most used for water treatment purposes and has achieved efficiencies of over 90% in alkaline pH, the potential applications of the other generations are still under investigation. Thus, this mini-review summarizes the synthesis methods of the different Fe-TAML generations, presents the mechanism of action of the Fe-TAML/H<inf>2</inf>O<inf>2</inf> compound in pollutant degradation, and analyzes the most recent studies on applying this compound to degrade different pollutants in aqueous media.