Photocatalytic and photo-Fenton-like degradation of methylparaben on monolith-supported perovskite-type catalysts

Heterogeneous photo-Fenton degradation of organics using highly efficient Cu-doped LaFeO3 under visible light

“…The LaMeO3 (Me = Fe, Co, Mn, Ni, Cu) perovskites supported on cordierite monolith, which were prepared by impregnation method, exhibited photo-Fenton activity to remove acetic acid; especially the use of 10.5 wt% LFO supported on cordierite monolith reached 93% TOC removal after 7 h under a variable addition of H2O2 (0.014 M/h after 1 h and 0.007 M/h in the rest of test) at pH = 3.9 under UV light irradiation [19]. Orak et al prepared LFO on a monolithic structure by sol-gel method and yielded almost complete removal of methylparaben (MP) after 30 min under the reaction conditions of 0.1 g/L catalyst, 5 ppm MP, 1 mM of H2O2, initial pH 7 and UV light power of 12 W [20]. However, these photo-Fenton-like decontamination processes need a relatively long reaction time or special UV light source to complete.…”

Ti-Modified LaFeO3/β-SiC Alveolar Foams as Immobilized Dual Catalysts with Combined Photo-Fenton and Photocatalytic Activity

“…However, these foam-based catalysts usually suffer from a low stability of the Fe-containing supported active phase, and from uncomplete mineralization of the effluent. It is worth noting that photo-Fenton-like degradation was recently achieved on perovskite-type catalysts supported on cordierite honeycomb monoliths , 29 and on TiO2-FeSO4 immobilized on metallic foams 30 .…”

Paraben Compounds—Part II: An Overview of Advanced Oxidation Processes for Their Degradation

“…The use of UV with H 2 O 2 reagent leads to the generation of two hydroxyl radicals (Equation (31)) which should enhance the removal performance [35,75,76] compared to a single H 2 O 2 reagent that cannot produce these types of radicals. Furthermore, organic and inorganic peroxyl radicals can be generated using H 2 O 2 /UV in the presence of oxygen and other organic compounds [45].…”

“…AOP technologies such as ozonation [23][24][25]; catalytic ozonation [26]; photocatalytic ozonation [27,28]; Fenton's process [29,30]; photo-Fenton [31]; photocatalysis with UV radiation [7,32], visible radiation [6,33], and solar radiation [34]; photolysis using UV radiation [35]; photoelectrocatalysis [36]; photo-sonochemical degradation [37]; or sonochemical oxidation [38,39] were already used for parabens abatement.…”