Effect of pH and H2O2 dosage on catechol oxidation in nano-Fe3O4 catalyzing UV–Fenton and identification of reactive oxygen species

Effectiveness of the dispersion of iron nanoparticles within micropores and mesopores of activated carbon for Rhodamine B removal in wastewater by the heterogeneous Fenton process

“…The catalytic activity was tested through several series of experiments (operated in triplicate) in 200 mL of Rhodamine B solution at a given concentration under magnetic stirring (300 rpm) with the required doses of catalyst and H 2 O 2 (30 wt%) in Erlenmeyer flasks. At the selected time, 1 mL was collected from the reaction solution and diluted in 4 mL of distilled water, and then, 0.3 mL of Na 2 SO 3 (0.1 mol/L) was added to deactivate the hydroxyl radicals (Li et al 2014). The solution was thus centrifuged with a centrifuge at 3000 rpm to recover the supernatant without fines particles and analyzed by UV-visible spectrophotometry (Cary scan 50) at 554 nm to determine the Rhodamine…”

Microwave-enhanced catalytic wet peroxide oxidation of quinoline: the influence of pH and H2O2dosage and identification of reactive oxygen species

“…† Samples were taken at set time intervals: some sample was promptly quantied for H 2 O 2 concentration; Na 2 SO 3 was introduced to the remainder to impede the ongoing redox reaction before TOC (Total Organic Carbon) measurement. 27 In probing the oxygen radicals included in the heterogeneous MW-CWPO catalyzed by supported Cu/Ni bimetallic oxides, NB and carbon CT were utilized as scavengers for cOH and O2c À , respectively, assessing the variation of the removal rate of 100 mg L À1 quinoline with 22.75 mmol L À1 H 2 O 2 , 4 g L À1 Cu/Nicatalyst, temperature of 333 K, and initial pH of 7.0 under MW (500 W) irradiation to identify relevant radicals.…”

Preparation and photocatalytic activity of lepidocrocites obtained byphotocatalytic oxidation of Fe(II) in the presence of citric acid

“…And most iron oxides are semiconductors, capable of exhibiting photocatalytic activity under solar irradiation [2][3]. γ-FeOOH seems to be a suitable representative among the iron oxides, because it has higher activity as a metastable phase [4].…”