Characterization of nanostructured allophane clays and their use as support of iron species in a heterogeneous electro-Fenton system
Source abstract
Abstract
Nanostructured allophane clays supported with iron oxide (AlSi2Fe6) were characterized by X-ray photoelectron spectroscopy (XPS) and Mössbauer spectroscopy showing the presence of both Fe 3 + and Fe 2 + species on the allophane surface. A glassy carbon disk (GC) modified with a film obtained by the deposition of drops of a dispersion formed by graphite and AlSi2Fe6 in water was used as working electrode in a heterogeneous electro-Fenton system (HE-Fenton) for the oxidation of atrazine. The effect of the initial pHs and the proportion of AlSi2Fe6/graphite in the mixture were studied and compared with the heterogeneous Fenton process. The HE-Fenton system using AlSi2Fe6-GC electrodes showed higher efficiency towards the oxidation of atrazine than the heterogeneous Fenton one; mainly due to the continuous and simultaneous electro-regeneration of iron species (Fe 3 +/Fe 2 + ) and electro-generation of hydrogen peroxide by the oxygen reduction process. The degradation of atrazine in this HE-Fenton system reached almost 100% at pH 3.0 after 8 h, whereas at more neutral pH (~ 6) a 76% of degradation was obtained. Two reaction products were identified by HPLC: desethyl-atrazine (DEA) and desethyl-desisopropyl-atrazine (DEIA).
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced oxidation water treatment · Iron oxide chemistry and applications · Arsenic contamination and mitigation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (55)
Show source-provided references
1. Fe@Fe2O3 core–shell nanowires as an iron reagent. Their combination with CNTs as an effective oxygen-fed gas diffusion electrode in a neutral electro-Fenton system10.1021/jp073617c ↗
2. Electro-Fenton degradation of rhodamine B based on a composite cathode of Cu2O nanocubes and carbon nanotubes10.1021/jp803243t ↗
3. Application of advanced oxidation processes for TNT removal: a review10.1016/j.jhazmat.2010.02.042 ↗
4. Degradation of atrazine in aqueous medium by electrocatalytically generated hydroxyl radicals. A kinetic and mechanistic study10.1016/j.watres.2009.01.021 ↗
5. X-ray photoelectron spectroscopic study of the possible interactions of biocells with the surfaces of select silicates10.1002/(SICI)1096-9918(199602)24:2<99::AID-SIA98>3.0.CO;2-I ↗
6. ESCA studies of the coordination state of aluminium in oxide environments. J. Chem. Soc10.1039/a604061f ↗
7. Oxidative decomposition of atrazine by a Fenton-like reaction in a H2O2/ferrihydrite system10.1016/j.watres.2006.09.016 ↗
8. Degradation studies of ciprofloxacin on a pillared iron catalyst10.1016/j.apcatb.2008.01.029 ↗
9. Degradation of atrazine by electrochemical advanced oxidation processes using a boron-doped diamond anode10.1021/jp1035647 ↗
10. Nanoclays from an Andisol: extraction, properties and carbon stabilization10.1016/j.geoderma.2010.12.013 ↗
11. Electro-oxidation of phenol on zeolite/graphite composite electrodes: part 1. Electrochemical behaviour over NaYzeolite10.1016/j.molcata.2005.12.004 ↗
12. Catalytic wet peroxide oxidation of phenol over Fe-exchanged pillared beidellite10.1016/S0043-1354(02)00449-9 ↗
13. Modeling the reaction kinetics of Fenton's process on the removal of atrazine10.1016/S0045-6535(02)00812-3 ↗
14. X-ray photoelectron spectroscopic characterization of silica spring allophone10.1180/claymin.1997.032.4.07 ↗
15. Phenol hydroxylation using Fe-MCM-41 catalysts10.1016/j.cattod.2005.10.037 ↗
16. Chorkendorff · 2003 · 149
17. Characterisation of adsorbed iron in montmorillonite by Mössbauer spectroscopy A10.1346/CCMN.1982.0300108 ↗
18. Síntesis de aluminosilicatos semejantes a los existentes en suelos volcánicos
19. Effect of iron oxide coatings in electrophoretic mobility and dispersion of allophone10.1016/0021-9797(83)90386-7 ↗
20. Mineral iron oxides as iron source in electro-Fenton and photoelectron-Fenton mineralization processes10.1149/1.2744134 ↗
21. Design of an electro-Fenton system with a novel sandwich cathode for wastewater treatment10.1016/j.jhazmat.2009.11.085 ↗
22. Kinetic modelling of Fe(III)/H2O2 oxidation reactions in dilute aqueous solution using atrazine as a model organic compound10.1016/S0043-1354(00)00074-9 ↗
23. Clays and oxide minerals as catalysts and nanocatalysts in Fenton-like reactions — a review10.1016/j.clay.2009.11.044 ↗
24. Catalytic wet peroxide oxidation of phenol over iron or copper oxide-supported allophane clay materials: influence of catalyst SiO2/Al2O3 ratio10.1016/j.micromeso.2012.06.038 ↗
25. Electrochemical determination of methocarbamol on a montmorillonite-Ca modified carbon paste electrode in formulation and human blood10.1016/j.bioelechem.2010.06.005 ↗
26. Iron-enriched natural zeolite modified carbon paste electrode for H2O2 detection10.1016/j.electacta.2010.02.058 ↗
27. Characterization of a carbon paste electrode modified with tripolyphosphate-modified kaolinite clay for the detection of lead10.1016/j.talanta.2011.06.014 ↗
28. A surface spectroscopic study of the corrosion of ultrathin 57Fe evaporated and Langmuir–Blodgett films in humid SO2 environments10.1002/(SICI)1096-9918(200001)29:1<82::AID-SIA696>3.0.CO;2-2 ↗
29. Impact of pesticides used in agriculture and vineyards to surface and groundwater quality (North Spain)10.1016/j.watres.2008.04.009 ↗
30. Studies of the surface charge of amorphous aluminosilicates using surface complexation models10.1016/j.jcis.2005.05.083 ↗
31. Treatability of chloro-s-triazines by conventional drinking water treatment technologies10.1016/j.watres.2006.02.013 ↗
32. Destruction of lindane and atrazine using stabilized iron nanoparticles under aerobic and anaerobic conditions: effects of catalyst and stabilizer10.1016/j.chemosphere.2007.06.070 ↗
33. Removal of herbicide from aqueous solutions by adsorption on Al-pillared clays, Fe–Al Pillared clays and mesoporous alumina aluminium phosphates10.1016/S0043-1354(00)00071-3 ↗
34. Rates of hydroxyl radical generation and organic compound oxidation in mineral-catalyzed Fenton-like systems10.1021/es020874g ↗
35. Source and persistence of pesticides in a semi-confined chalk aquifer of southeast England10.1016/j.envpol.2005.12.055 ↗
36. Selected chloro-organic detoxications by polychelate (poly(acrylic acid)) and citrate-based Fenton reaction at neutral pH environment10.1021/ie070393b ↗
37. Design of a neutral electro-Fenton system with Fe@Fe2O3 composite cathode for wastewater treatment10.1016/j.jhazmat.2008.07.109 ↗
38. Catalytic decomposition of hydrogen peroxide on iron oxide: kinetics, mechanism, and implications10.1021/es970648k ↗
39. Oxidation of the pesticide atrazine at DSA® electrodes10.1016/j.jhazmat.2006.02.045 ↗
40. X-ray photoelectron spectroscopic studies of iron oxides10.1021/ac50019a016 ↗
41. Síntesis y caracterización de suelos alofanicos
42. Heterogeneous Fenton catalysts based on clays, silicas and zeolitas10.1016/j.apcatb.2010.07.006 ↗
43. Trends in electro-Fenton process for water and wastewater treatment: an overview10.1016/j.desal.2012.05.011 ↗
44. Fundamentos e aplicacoes ambientais dos processos Fenton e Foto-Fenton10.1590/S0100-40422007000200030 ↗
45. Combination of advanced oxidation processes and biological treatments for wastewater decontamination—a review10.1016/j.scitotenv.2010.08.061 ↗
46. Unprecedented total mineralization of atrazine and cyanuric acid by anodic oxidation and electro-Fenton with a boron-doped diamond anode10.1007/s10311-011-0337-z ↗
47. Carbon sponge as a new cathode material for the electro-Fenton process: comparison with carbon felt cathode and application to degradation of synthetic dye basic blue 3 in aqueous medium10.1016/j.jelechem.2008.01.002 ↗
48. Allophane and imogolite: role in soil biogeochemical processes10.1180/claymin.2009.044.1.135 ↗
49. In situ electrochemical and photo-electrochemical generation of the Fenton reagent: a potentially important new water treatment technology10.1016/j.watres.2006.03.004 ↗
50. Corrosion and corrosion control, an introduction to corrosion science and engineering
51. Goethite as a more effective iron dosage source for mineralization of organic pollutants by electro-Fenton process10.1016/j.elecom.2006.08.023 ↗
52. Atrazine and simazine monitoring data in community water systems in the United States during 1993 to 2000
53. Chlorophenol electrooxidation on iron oxide-covered aluminosilicates deposited on glassy carbon10.1023/A:1021680420834 ↗
54. Electrochemical generation of the Fenton's reagent: application to atrazine degradation10.1016/S0043-1354(02)00064-7 ↗
55. Physicochemical property effects of three herbicides and three soils on herbicide mobility in field lysimeters10.1016/j.cropro.2006.01.020 ↗