Catalyst reutilization in phenol homogeneous cupro-Fenton oxidation

The pH effect on the kinetics of 4-nitrophenol removal by CWPO with doped carbon black catalysts

“…This can be explained by the fact that the concentration of H 2 O 2 was considered to be the stoichiometric amount needed to mineralize 4-NP, thus the consumption of H 2 O 2 is not directly related to the conversion of 4-NP, but rather to the mineralization extent (not included in this work). Interestingly, most of the works in the literature studied how the pH affects the conversion of the model pollutant under study, but not the effect of the pH on the consumption of H 2 O 2 [34,36,43,60]. A significant effect of the pH on the conversion of both pollutant and H 2 O 2 has been found in the CWPO of phenol with Fe/γ-Al 2 O 3 [41].…”

Modified diatomites for Fenton-like oxidation of phenol

“…Metal leaching is hard to avoid during the heterogeneous Fenton oxidation of organic pollutants. In order to remove the metal leached, the heterogeneous Fenton process could be coupled with a precipitation or filtration step [56,57] which would generate a reduced volumen of sludge in comparison with a homogeneous process.…”

Chemical vapor deposition of CuO on ZSM-5 membrane for catalytic wet peroxide oxidation of phenol in a fixed bed reactor

“…The existence of Cu 2+ can promote the conversion of H 2 O 2 at high temperatures and in a wide-working pH range (pH 3-7). 13 Due the continues removal of Cu 2+ in the xed bed reactor, the homogeneous reaction is limited in this system. Fig.…”

“…Phenol oxidation has been approached using CWPO with homogeneous catalysts and heterogeneous catalysts under hydrogen. [11][12][13] Hydrogen peroxide is easily decomposed to powerful oxidizing hydroxyl radicals in the present of transition metals (Fe 3+ , Fe 2+ , Cu 2+ ) with redox properties. 7 However, the use of homogeneous catalysts causes difficulties in the catalyst separation and regeneration.…”