Oxidation of pollutants via an electro-Fenton-like process in aqueous media using iron–zeolite modified electrodes

Abstract

Eco-friendly modified electrodes based on zeolites are applied for electro-Fenton dye oxidation without the addition of H2O2 at room temperature.

Degradation of pollutants in water by Fenton-like oxidation over LaFe-catalysts: Optimization by experimental design

“…In the absence of Caf, two redox processes were identified: one recorded at -0.30 vs. SCE and another at 0.56 V vs. SCE. These values are related to the different metal species, the first one probably attributed to the La(0)/La(III) couple while the second one is attributed to Fe(II)/Fe(III) couple [24,41,51].…”

“…The catalysts were prepared by an ion-exchange method using the adapted procedure described elsewhere [24,25]. Aqueous solutions (250 mL) containing different lanthanum amounts (0.90x10 -2 mmol for (NH4)ZSM5 and ClayM, and 2.70x10 -2 mmol for NaY) were mixed with 4 g of the pristine support at pH 4.…”

“…Electrochemical measurements were performed as described elsewhere [24,28,29]. The electroactivity of the modified electrode was investigated by cyclic voltammetry (CV) in the absence and in the presence of Caf in Na2SO4 (0.10 M).…”