Enhancement of Fenton oxidation for removing organic matter from hypersaline solution by accelerating ferric system with hydroxylamine hydrochloride and benzoquinone

Removal of persistent textile dyes from wastewater by Fe(ii)/H2O2/H3NOH+ integrated system: process performance and limitations

“…57 The complexation of Fe(II)/Fe(III) with Cl À through reactions ( 24)-( 27) is another pathway that may cause a decline in oxidation efficiency via consumption of free iron. 19 Cl À + cOH / ClOHc À , k 21 ¼ 4.3 Â 10 9 M À1 s À1 (21)…”

Enhanced Photo–Fenton Removal Efficiency with Core-Shell Magnetic Resin Catalyst for Textile Dyeing Wastewater Treatment

“…However, the MAER sample had a slight red-shift near the low frequency region at 1200-1300 cm −1 . This may be due to the combination of certain functional groups on the resin surface with Fe atom [24]. The XPS analysis was further performed to understand the compositions of Fe(II) and Fe(III) in the MAER catalyst, as shown in Figure S3.…”

Improving the efficiency of Fenton reactions and their application in the degradation of benzimidazole in wastewater

“…38 The H 2 O 2 concentrations were measured via a titanium potassium oxalate colorimetric method using a Hitachi U2910 UV-vis spectrometer at a wavelength of 388 nm. 39 The Fe 2+ concentration was determined via photometric measurement with 1,10-phenanthroline according to ISO 6332 using a UV-vis spectrophotometer (Zuzi 4418PC). 40 Quantification of ˙OH was carried out using methylene blue spectrophotometry at 666 nm.…”

“…The Fenton 1,2 reaction, as one of the most successful advanced oxidation processes (AOPs), 3–9 has attracted great interest in recent years due to its advantages of high performance, procedural simplicity, low cost and low reagent toxicity. 10 The reaction is based on the in situ production of hydroxyl radicals (˙OH), which are one of the most reactive free radicals and exhibit non-selective reactivity, with reactive rate constants commonly in the order of 10 7 –10 10 M −1 S −1 , 11 and oxidizing potentials of 2.8 V, second only to fluorine gas. 12–14 The Fenton reaction can be applied to degrade a wide range of recalcitrant and toxic pollutants found in pharmaceutical and dye wastewaters, 15,16 especially aromatic compounds with electron-donating groups.…”