The progress of catalytic technologies in water purification: A review

Abstract

Catalytic technologies have been paid increasing attention in refractory pollutants abatement due to its practical and potential values in water purification. As effective and efficient approaches for water purification, Fenton's reagent, ozonation, electrochemical and photocatalytic methods have been widely studied and applied in different aspects and have been reviewed by several articles. In recent years, some novel catalytic processes based on above processes have been developed for enhancing the efficiency of removing the organics from water. This review emphasized on the recent development of heterogeneous catalytic ozonation, electrocatalysis in respect of novel electrodes and electro-Fenton method, photoelectrocatalysis process and photoelectron-Fenton in water purification. It was also an attempt to propose general ideas about mechanism and principle enhancing the catalytic efficiency for the degradation and the mineralization of organics in water.

Effect of phosphate on heterogeneous Fenton oxidation of catechol by nano-Fe 3 O 4 : Inhibitor or stabilizer?

“…The heterogeneous Fenton reaction, as one of the advanced oxidation processes (AOPs), has drawn extensive attention due to its unique advantages in the removal of organic pollutants from contaminated waters and soils (Pignatello et al, 2006;Li and Qu, 2009). Similar to the classic Fenton reaction, the heterogeneous Fenton reaction of a Fe-containing solid catalyst could generate hydroxyl radicals from H 2 O 2 (Pignatello et al, 2006;Matta et al, 2008;Duan et al, 2014).…”

Treatment of a simulated phenolic effluent by heterogeneous catalytic ozonation using Pt/Al2O3

“…Among them, catalytic ozonation has revealed high capacity for the degradation * Corresponding author. Email: martins@eq.uc.pt and mineralization of phenolic contaminants, lowering the negative effects on water quality [13][14][15][16]. In general, heterogeneous oxidation has shown to be promisingly efficient for the removal of organic compounds [17,18]; it is necessary, however, to pay attention to the activity and stability of the catalysts whose characteristics depend on the operating conditions.…”

Treatment Technologies for Organic Wastewater

“…The major advantage of a heterogeneous over a homogeneous catalytic system is the ease of catalytic retrieval from the reaction media. Results suggest that catalytic ozonation with MnOx/MZ, CoOx/MZ and CuOx/Al2O3 is a promising technique for the mineralization of refractory organic compounds in water [20].…”