Sulfidised nanoscale zerovalent iron-modified pitaya peel-derived carbon for enrofloxacin degradation and swine wastewater treatment: Combination of electro-Fenton and bio-electro-Fenton process

Urea and ammonium fluoride di-nitrogen and Cu & Fe bi-metal co-doped carbon felt as cathode for electro-Fenton degradation of norfloxacin: 1O2-dominated oxidation pathway

“…36 The vibrational peaks at 1441 cm −1 and 1720 cm −1 correspond to C–O and CO, respectively, and the broad vibrational peaks at 2865 cm −1 and 2921 cm −1 are attributed to C–H bonds. 21,49 The C–N stretching vibration was observed at 1321 cm −1 on C–CuFe/UN, C–CuFe/FN and C–CuFe/N. 50 A vibrational peak at 697 cm −1 corresponding to M–OH could be seen in C–CuFe/FN and C–CuFe/N, 51 which can be attributed to Fe(OH) 2 according to the XRD results.…”

“…16,17 However, the prominent disadvantage of metal-loaded carbon catalysts is the leaching of the metal ions, especially under acidic conditions, 18,19 which may cause secondary pollution. Thus, to solve the problem of secondary pollution caused by leaching, some studies loaded non-metallic heteroatoms instead of metals on carbon materials, such as N, 20 S, 21 and B, 22 for the construction of metal-free electro-Fenton cathode catalysts. Among them, the N heteroatom not only has abundant sources including endogenous and exogenous, but also abundant in the nitrogen species generated during the doping process on carbons, and thus has been widely applied.…”

Bio-Fenton-Assisted Biological Process for Efficient Mineralization of Polycyclic Aromatic Hydrocarbons from the Environment

“…Bio-Fenton, an alternative to the Fenton reaction, which generates hydrogen peroxide at a nearly neutral pH condition, has overcome the limitation of the Fenton reaction [17,18]. With help of glucose oxidase (GOD), glucose could be oxidized to gluconic acid and hydrogen peroxide, where the chelating effect of gluconic acid facilitates the Bio-Fenton reaction to be performed under a neutral pH level, and the generated hydrogen peroxide could effectively oxidize the organic pollutants [19][20][21]. According to the existing literature, the Bio-Fenton reaction has proven its efficacy in degrading several types of recalcitrant organics, such as trichloroethylene (TCE), dyes, PAHs, etc.…”