Production of hydroxyl radicals by electrochemically assisted Fenton's reagent

Kinetic study of the degradation/mineralization of aqueous solutions contaminated with Rosuvastatin drug by Electro-Fenton: Influence of experimental parameters

“…Mineralization rate is optimum for 0.2 mM concentration. Similar observations have been reported in the previous studies [62,63]. …”

Mineralization of an azo dye Acid Red 14 by photoelectro-Fenton process using an activated carbon fiber cathode

“…The Fe 2+ was also continuously regenerated in small extent for the reaction of Fe 3+ in the medium with electrogenerated H 2 O 2 by reaction (14) with k 2 = 3.1 Â 10 À3 M À1 s À1 , with hydroperoxyl radical by reaction (15) with k 2 < 1 Â 10 À3 M À1 s À1 , and/or with organic radical intermediates R by reaction (16) [19,21]. Moreover, in PEF process, the electrogeneration of Fe 2+ could also be enhanced by reaction (5) and (6), so the type of iron ion has little influence on the EF and PEF reaction for degradation of AR14.…”

“…In recent years indirect electrooxidation methods with hydrogen peroxide electrogeneration, such as electro-Fenton (EF) and photoelectro-Fenton (PEF) reactions, are being developed for the treatment of toxic and refractory organic pollutants in acid waters . In these environmentally friendly electrochemical techniques, hydrogen peroxide is continuously generated in an acidic contaminated solution from the two-electron reduction of O 2 which takes place on graphite [3][4][5], reticulated vitreous carbon [6][7][8][9], mercury pool [10][11][12], carbon-felt [13][14][15][16][17][18] O 2 -diffusion [19][20][21][22][23][24][25][26][27][28][29] and activated carbon fiber (ACF) [30] cathodes. In acidic aqueous medium the oxidation power will be enhanced by addition of ferrous ions to the solution that allows the production of a very reactive one-electron oxidizing agent hydroxyl radical ( OH) (E8 = 2.8 V/NHE) from the well-known Fenton reaction between both species with a secondorder rate constant k 2 = 53 M À1 s À1 [11].…”

Silver nanoparticles decorated anatase TiO 2 nanotubes for removal of pentachlorophenol from water

“…It exists in water and soil, which can migrate to groundwater, thereby causing a potential risk to animals and human [2]. Many methods such as sorption [3][4][5], biodegradation [6][7][8], oxidation [9][10][11][12][13][14][15], photocatalytic degradation [16,17], and electrochemical methods [18][19][20] have been used to remove PCP from environment. Sorption only transfers pollutants from the aqueous phase to the surface of adsorbents, it does not eliminate pollutants.…”