Benchmarking recent advances and innovative technology approaches of Fenton, photo-Fenton, electro-Fenton, and related processes: A review on the relevance of phenol as model molecule

Abstract Water contamination with persistent organic pollutants is one of the great engineering challenges of this century. Development of technologies to completely remove these compounds from water sources to avoid human and environmental health risks is a hot topic of research and a societal need in the sustainable development goals. Fenton-based technologies are advanced oxidation processes showing very promising results on water pollution control. This critical review provides a benchmark framework of understanding on the state of the art of Fenton, photo-Fenton, electro-Fenton and related technologies and their recent advances based on the oxidation of phenol as model compound. Fundamental principles and oxidation mechanisms to understand niche application and competitiveness of these technologies are thoroughly described. Especial emphasis is given to recent breakthroughs to overcome technology implementation barriers such as the narrow pH conditions. This review points out the utility of phenol as reference to evaluate impact of cutting edge advances.

[1]  M. Entezari,et al.  Solar-Fenton catalytic degradation of phenolic compounds by impure bismuth ferrite nanoparticles synthesized via ultrasound , 2014 .

[2]  H. García,et al.  Sunlight-assisted Fenton reaction catalyzed by gold supported on diamond nanoparticles as pretreatment for biological degradation of aqueous phenol solutions. , 2011, ChemSusChem.

[3]  Qun Chen,et al.  Benzenoid-like CuFeO2@reduced graphene oxide: Facile synthesis and its excellent catalytic performance in selective oxidation , 2016 .

[4]  Francisco Medina Cabello,et al.  Improved Fe2O3/Al2O3 as heterogeneous Fenton catalysts for the oxidation of phenol solutions in a continuous reactor , 2014 .

[5]  Xiaochun Chen,et al.  Visible-light photo-Fenton oxidation of phenol with rGO-α-FeOOH supported on Al-doped mesoporous silica (MCM-41) at neutral pH: Performance and optimization of the catalyst. , 2017, Chemosphere.

[6]  Xiaofeng Xu,et al.  An integrated catalyst of Pd supported on magnetic Fe3O4 nanoparticles: simultaneous production of H2O2 and Fe2+ for efficient electro-Fenton degradation of organic contaminants. , 2014, Water research.

[7]  N. Gondrexon,et al.  Coupling between high-frequency ultrasound and solar photo-Fenton at pilot scale for the treatment of organic contaminants: an initial approach. , 2015, Ultrasonics sonochemistry.

[8]  N. Behary,et al.  Bio-Fenton and Bio-electro-Fenton as sustainable methods for degrading organic pollutants in wastewater , 2018 .

[9]  J. M. Doña-Rodríguez,et al.  Performance and economic assessment of the treatment of phenol with TiO2 photocatalysis, photo-fenton, biological aerated filter, and wetland reactors , 2017 .

[10]  J. Tuček,et al.  Micro–mesoporous iron oxides with record efficiency for the decomposition of hydrogen peroxide: morphology driven catalysis for the degradation of organic contaminants , 2016 .

[11]  Sergi Garcia-Segura,et al.  Photoelectrocatalytic decolorization of azo dyes with nano-composite oxide layers of ZnO nanorods decorated with Ag nanoparticles. , 2019, Chemosphere.

[12]  J. Jia,et al.  Visible Light Assisted Heterogeneous Fenton-Like Degradation of Organic Pollutant via α-FeOOH/Mesoporous Carbon Composites. , 2017, Environmental science & technology.

[13]  Yangcheng Lu,et al.  Synthesis of single-crystal dendritic iron hydroxyl phosphate as a Fenton catalyst , 2013 .

[14]  Zhongping Yao,et al.  A novel solid acid coating catalyst on Q235 carbon steel for Fenton-like oxidation of phenol under circumneutral pH , 2017 .

[15]  W. Koppenol,et al.  Standard electrode potentials involving radicals in aqueous solution: inorganic radicals , 2013 .

[16]  Jie Ren,et al.  Phosphate-induced differences in stabilization efficiency for soils contaminated with lead, zinc, and cadmium , 2018, Frontiers of Environmental Science & Engineering.

[17]  R. Köferstein,et al.  LaFeO3 and BiFeO3 perovskites as nanocatalysts for contaminant degradation in heterogeneous Fenton-like reactions , 2014 .

[18]  Pan Gao,et al.  An effective and magnetic Fe2O3-ZrO2 catalyst for phenol degradation under neutral pH in the heterogeneous Fenton-like reaction , 2018, Separation and Purification Technology.

[19]  J. M. Pinto,et al.  A mechanistic kinetic model for phenol degradation by the Fenton process. , 2010, Journal of hazardous materials.

[20]  Helmut Baltruschat,et al.  Chlorine species evolution during electrochlorination on boron-doped diamond anodes: In-situ electrogeneration of Cl2, Cl2O and ClO2 , 2018, Electrochimica Acta.

[21]  Y. Huang,et al.  Degradation of phenol using low concentration of ferric ions by the photo-Fenton process , 2010 .

[22]  Zhongping Yao,et al.  Preparation of immobilized coating Fenton-like catalyst for high efficient degradation of phenol. , 2017, Environmental pollution.

[23]  Yang Wang,et al.  Degradation of phenol by a heterogeneous photo-Fenton process using Fe/Cu/Al catalysts , 2016 .

[24]  H. García,et al.  Influence of hydrogen annealing on the photocatalytic activity of diamond-supported gold catalysts. , 2013, ACS applied materials & interfaces.

[25]  K. Parida,et al.  Quick photo-Fenton degradation of phenolic compounds by Cu/Al2O3-MCM-41 under visible light irradiation: small particle size, stabilization of copper, easy reducibility of Cu and visible light active material. , 2013, Dalton transactions.

[26]  C. Minero,et al.  Role of H2O2 in the photo-transformation of phenol in artificial and natural seawater. , 2012, The Science of the total environment.

[27]  K. Parida,et al.  Fe/meso-Al2O3: An Efficient Photo-Fenton Catalyst for the Adsorptive Degradation of Phenol , 2010 .

[28]  Lau Yien Jun,et al.  An overview of immobilized enzyme technologies for dye and phenolic removal from wastewater , 2019, Journal of Environmental Chemical Engineering.

[29]  Jans H. Alzate-Morales,et al.  A characterization of the two-step reaction mechanism of phenol decomposition by a Fenton reaction , 2015 .

[30]  S. Hong,et al.  Magnetite/mesocellular carbon foam as a magnetically recoverable fenton catalyst for removal of phenol and arsenic. , 2012, Chemosphere.

[31]  A. Karimi-Jashni,et al.  Comparison of photo-Fenton, O3/H2O2/UV and photocatalytic processes for the treatment of gray water. , 2018, Ecotoxicology and environmental safety.

[32]  Haibo Xu,et al.  Electrogeneration of hydrogen peroxide for electro-Fenton via oxygen reduction using polyacrylonitrile-based carbon fiber brush cathode , 2015 .

[33]  J. Marco,et al.  Preparation and characterization of bimetallic Fe-Cu allophane nanoclays and their activity in the phenol oxidation by heterogeneous electro-Fenton reaction , 2016 .

[34]  E. Mousset,et al.  Electrocatalytic activity enhancement of a graphene ink-coated carbon cloth cathode for oxidative treatment , 2016 .

[35]  Changha Lee,et al.  Chloride-enhanced oxidation of organic contaminants by Cu(II)-catalyzed Fenton-like reaction at neutral pH. , 2018, Journal of hazardous materials.

[36]  Jianxun Hu,et al.  Study of phenol removal using fluidized-bed Fenton process , 2012 .

[37]  M. Triki,et al.  Pd–Fe/TiO2 catalysts for phenol degradation with in situ generated H2O2 , 2014, Journal of Sol-Gel Science and Technology.

[38]  K. Muthukumar,et al.  Degradation of Phenol in Aqueous Solution by Fenton, Sono‐Fenton and Sono‐photo‐Fenton Methods , 2011 .

[39]  Chengzhi Hu,et al.  Enhanced catalytic activity of α-FeOOH-rGO supported on active carbon fiber (ACF) for degradation of phenol and quinolone in the solar-Fenton system. , 2018, Chemosphere.

[40]  Sergi Garcia-Segura,et al.  Implementation of fluidized-bed Fenton as pre-treatment to reduce chemical oxygen demand of wastewater from screw manufacture: Influence of reagents feeding mode , 2018, Separation and Purification Technology.

[41]  H. García,et al.  Influence of pretreatments on commercial diamond nanoparticles on the photocatalytic activity of supported gold nanoparticles under natural Sunlight irradiation , 2013 .

[42]  M. I. Pariente,et al.  Extrusion of Fe 2 O 3 /SBA-15 mesoporous material for application as heterogeneous Fenton-like catalyst , 2015 .

[43]  Sergi Garcia-Segura,et al.  Enhancement of biodegradability of o-toluidine effluents by electro-assisted photo-Fenton treatment , 2017 .

[44]  D. Sedlak,et al.  pH-Dependent reactivity of oxidants formed by iron and copper-catalyzed decomposition of hydrogen peroxide. , 2013, Chemosphere.

[45]  Bo-Tao Zhang,et al.  Synthesis of mesoporous MCM-41 supported reduced graphene oxide-Fe catalyst for heterogeneous Fenton degradation of phenol , 2015 .

[46]  Á. Blanco,et al.  Assessing the use of zero-valent iron microspheres to catalyze Fenton treatment processes , 2016 .

[47]  Y. Kawase,et al.  Phenol removal using zero-valent iron powder in the presence of dissolved oxygen: roles of decomposition by the Fenton reaction and adsorption/precipitation. , 2012, Journal of hazardous materials.

[48]  Mohammad. Rasul,et al.  Heterogeneous photocatalytic degradation of phenols in wastewater: A review on current status and developments , 2010 .

[49]  M. Nemati,et al.  Oxidation of phenol in a bioremediation medium using Fenton's reagent , 2010, Environmental technology.

[50]  A. Eslami,et al.  Comparison of phenol photodegradation by UV/H2O2 and photo-Fenton processes. , 2010 .

[51]  N. Biswas,et al.  A Short Review of Techniques for Phenol Removal from Wastewater , 2016, Current Pollution Reports.

[52]  Xu Zhao,et al.  Synergetic activation of H 2 O 2 by photo-generated electrons and cathodic Fenton reaction for enhanced self-driven photoelectrocatalytic degradation of organic pollutants , 2018, Applied Catalysis B: Environmental.

[53]  Lixiang Zhou,et al.  Assessment of catalytic activities of selected iron hydroxysulphates biosynthesized using Acidithiobacillus ferrooxidans for the degradation of phenol in heterogeneous Fenton-like reactions , 2017 .

[54]  P. Costa,et al.  Fe-clay-plate as a heterogeneous catalyst in photo-Fenton oxidation of phenol as probe molecule for water treatment , 2014 .

[55]  Vinod K. Gupta,et al.  Preparation, characterizations and its application of heterogeneous Fenton catalyst for the treatment of synthetic phenol solution , 2013 .

[56]  Changha Lee,et al.  Synergistic effects of TiO2 photocatalysis in combination with Fenton-like reactions on oxidation of organic compounds at circumneutral pH , 2012 .

[57]  Jianfeng Chen,et al.  Study on the treatment of simulated coking wastewater by O3 and O3/Fenton processes in a rotating packed bed , 2015 .

[58]  Stefanos Giannakis,et al.  Solar disinfection is an augmentable, in situ-generated photo-Fenton reaction—Part 2: A review of the applications for drinking water and wastewater disinfection , 2016 .

[59]  Jianguo Liu,et al.  Reuse of Fenton sludge as an iron source for NiFe2O4 synthesis and its application in the Fenton-based process. , 2017, Journal of environmental sciences.

[60]  Xiangke Wang,et al.  Enhanced degradation of organic pollutants over Cu-doped LaAlO3 perovskite through heterogeneous Fenton-like reactions , 2018 .

[61]  E. Aneggi,et al.  Degradation of phenol in wastewaters via heterogeneous Fenton-like Ag/CeO2 catalyst , 2017 .

[62]  O. Chiavone-Filho,et al.  Analysis of solar and artificial UVA irradiations on the photo-Fenton treatment of phenolic effluent and oilfield produced water , 2018, Chemical Engineering Communications.

[63]  Jiashun Cao,et al.  Highly efficient degradation of phenol wastewater by microwave induced H 2 O 2 -CuO x /GAC catalytic oxidation process , 2018 .

[64]  C. Luca,et al.  Iron–alumina synergy in the heterogeneous Fenton-type peroxidation of phenol solutions , 2015 .

[65]  Jun Ma,et al.  A new insight into Fenton and Fenton-like processes for water treatment. , 2010, Journal of hazardous materials.

[66]  H. L. Brandão,et al.  Low-cost iron-doped catalyst for phenol degradation by heterogeneous Fenton. , 2018, Journal of hazardous materials.

[67]  D. Duprez,et al.  Shape-controlled nanostructured magnetite-type materials as highly efficient Fenton catalysts , 2014 .

[68]  Xu Han,et al.  Schwertmannite as a new Fenton-like catalyst in the oxidation of phenol by H2O2. , 2013, Journal of hazardous materials.

[69]  P. Westerhoff,et al.  Challenges in photocatalytic reduction of nitrate as a water treatment technology. , 2017, The Science of the total environment.

[70]  A. Ustinov,et al.  Characterization and photocatalytic activity of SiO2, FeOx coatings formed by plasma electrolytic oxidation of titanium , 2016 .

[71]  Jinlong Zhang,et al.  S-doped α-Fe2O3 as a highly active heterogeneous Fenton-like catalyst towards the degradation of acid orange 7 and phenol , 2010 .

[72]  Mingce Long,et al.  Magnetically separable core-shell structural γ-Fe2O3@Cu/Al-MCM-41 nanocomposite and its performance in heterogeneous Fenton catalysis. , 2014, Journal of hazardous materials.

[73]  Kai Sun,et al.  Controllable synthesis of coralloid Fe3O4 nanoclusters in an ionic liquid for catalytic applications , 2016 .

[74]  V. Vilar,et al.  Electrochemical advanced oxidation processes: A review on their application to synthetic and real wastewaters , 2017 .

[75]  S. Ookawara,et al.  Investigation of optimum conditions and costs estimation for degradation of phenol by solar photo-Fenton process , 2017, Applied Water Science.

[76]  Hongwu Cui,et al.  Ecotoxicity of phenol and cresols to aquatic organisms: A review. , 2018, Ecotoxicology and environmental safety.

[77]  I. Nambi,et al.  Synthesis, characterization and performance of high energy ball milled meso-scale zero valent iron in Fenton reaction. , 2016, Journal of environmental management.

[78]  Chaolin Li,et al.  Cathodic indirect oxidation of organic pollutant paired to anodic persulfate production , 2017 .

[79]  L. Da̧bek,et al.  Assessing the Influence of the Presence of Heavy Metals Adsorbed on Activated Carbon on the Efficiency of Degradation of Phenol Using Selected Oxidizing Agents , 2012 .

[80]  F. Stüber,et al.  Phenol Degradation by Heterogeneous Fenton-Like Reaction Using Fe Supported Over Activated Carbon , 2012 .

[81]  C. Nascimento,et al.  Feasibility Study of a Solar Reactor for Phenol Treatment by the Photo‐Fenton process in Aqueous Solution , 2012 .

[82]  A. Ustinov,et al.  FeOx,SiO2,TiO2/Ti composites prepared using plasma electrolytic oxidation as photo-Fenton-like catalysts for phenol degradation , 2018 .

[83]  H. García,et al.  Graphenes as Efficient Metal-Free Fenton Catalysts. , 2015, Chemistry.

[84]  I. Yeom,et al.  Combinative treatment of phenol-rich retting-pond wastewater by a hybrid upflow anaerobic sludge blanket reactor and solar photofenton process. , 2018, Journal of environmental management.

[85]  Manash R. Das,et al.  Ammonia-modified graphene sheets decorated with magnetic Fe3O4 nanoparticles for the photocatalytic and photo-Fenton degradation of phenolic compounds under sunlight irradiation. , 2017, Journal of hazardous materials.

[86]  Dairong Chen,et al.  Enhanced Catalytic Activity in Liquid-Exfoliated FeOCl Nanosheets as a Fenton-Like Catalyst. , 2016, Chemistry.

[87]  Ming-hua Zhou,et al.  Highly efficient in-situ metal-free electrochemical advanced oxidation process using graphite felt modified with N-doped graphene , 2018 .

[88]  Adrián M.T. Silva,et al.  Impact of water matrix on the removal of micropollutants by advanced oxidation technologies , 2019, Chemical Engineering Journal.

[89]  E. Brillas.  A review on the degradation of organic pollutants in waters by UV photoelectro-Fenton and solar photoelectro-Fenton , 2013 .

[90]  O. Chiavone-Filho,et al.  Effect of Inorganic Salt Mixtures on Phenol Mineralization by Photo-Fenton-Analysis via an Experimental Design , 2013, Water, Air, & Soil Pollution.

[91]  Kun Li,et al.  Heterogeneous photo-Fenton degradation of organic pollutants with amorphous Fe-Zn-oxide/hydrochar under visible light irradiation , 2017 .

[92]  J. Garrido,et al.  Comparative degradation of the diazo dye Direct Yellow 4 by electro-Fenton, photoelectro-Fenton and photo-assisted electro-Fenton , 2012 .

[93]  Andrzej Przyjazny,et al.  Wastewater treatment by means of advanced oxidation processes based on cavitation – A review , 2018 .

[94]  Sergi Garcia-Segura,et al.  Anodic oxidation, electro-Fenton and photoelectro-Fenton degradations of pyridinium- and imidazolium-based ionic liquids in waters using a BDD/air-diffusion cell , 2016 .

[95]  Enric Brillas,et al.  Fluidized-bed Fenton process as alternative wastewater treatment technology—A review , 2016 .

[96]  Zhongping Yao,et al.  A Fe3O4/FeAl2O4 composite coating via plasma electrolytic oxidation on Q235 carbon steel for Fenton-like degradation of phenol , 2016, Environmental Science and Pollution Research.

[97]  H. Akbari,et al.  Evaluation of Efficacy of Advanced Oxidation Processes Fenton, Fenton-like and Photo-Fenton for Removal of Phenol from Aqueous Solutions , 2015 .

[98]  P. Chiang,et al.  Catalytic oxidative degradation of phenol using iron oxide promoted sulfonated-ZrO2 by Advanced Oxidation Processes (AOPs) , 2018, Journal of the Taiwan Institute of Chemical Engineers.

[99]  S. Kim,et al.  Fe3S4/Fe7S8-promoted degradation of phenol via heterogeneous, catalytic H2O2 scission mediated by S-modified surface Fe2+ species , 2018, Applied Catalysis B: Environmental.

[100]  F. Akbal,et al.  Comparison of Fenton and electro-Fenton processes for oxidation of phenol , 2016 .

[101]  A. Ortíz-Gómez,et al.  Enhanced mineralization of phenol and other hydroxylated compounds in a photocatalytic process assisted with ferric ions , 2008 .

[102]  P. Tian,et al.  The generation of hydroxyl radicals by hydrogen peroxide decomposition on FeOCl/SBA‐15 catalysts for phenol degradation , 2015 .

[103]  W. Koppenol,et al.  Electrode potentials of partially reduced oxygen species, from dioxygen to water. , 2010, Free radical biology & medicine.

[104]  Jinping Jia,et al.  A metal-free visible light active photo-electro-Fenton-like cell for organic pollutants degradation , 2018, Applied Catalysis B: Environmental.

[105]  M. Sohrabi,et al.  Degradation of phenol by heterogeneous Fenton process in an impinging streams reactor with catalyst bed , 2017 .

[106]  S. Yun,et al.  Kinetic enhancement in photocatalytic oxidation of organic compounds by WO3 in the presence of Fenton-like reagent , 2013 .

[107]  Sergi Garcia-Segura,et al.  Effect of the Fe3+/Cu2+ ratio on the removal of the recalcitrant oxalic and oxamic acids by electro-Fenton and solar photoelectro-Fenton , 2016 .

[108]  F. Kopinke,et al.  Nano-sized magnetic iron oxides as catalysts for heterogeneous Fenton-like reactions-Influence of Fe(II)/Fe(III) ratio on catalytic performance. , 2012, Journal of hazardous materials.

[109]  R. Semiat,et al.  Kinetics of phenol mineralization by Fenton-like oxidation. , 2010 .

[110]  P. Roonasi,et al.  A comparative study of a series of ferrite nanoparticles as heterogeneous catalysts for phenol removal at neutral pH , 2016 .

[111]  J. Casas,et al.  Intensification of the Fenton Process by Increasing the Temperature , 2011 .

[112]  A. Wilhelm,et al.  Regeneration of Activated Carbon by (Photo)-Fenton Oxidation , 2010 .

[113]  T. Koné,et al.  Fenton-like oxidation and mineralization of phenol using synthetic Fe(II)–Fe(III) green rusts , 2010, Environmental science and pollution research international.

[114]  Huanhao Chen,et al.  Heterogeneous Fenton oxidation of phenol in fixed-bed reactor using Fe nanoparticles embedded within ordered mesoporous carbons , 2017 .

[115]  J. Lombraña,et al.  Analysis of the Toxicity of Phenol Solutions Treated with H2O2/UV and H2O2/Fe Oxidative Systems , 2011 .

[116]  J. Guilemany,et al.  Influence of atmospheric plasma spraying on the solar photoelectro-catalytic properties of TiO2 coatings , 2016 .

[117]  B. Logan,et al.  Using single-chamber microbial fuel cells as renewable power sources of electro-Fenton reactors for organic pollutant treatment. , 2013, Journal of hazardous materials.

[118]  Yan Wu,et al.  Effective degradation of phenol via Fenton reaction over CuNiFe layered double hydroxides. , 2018, Journal of hazardous materials.

[119]  V. Sharma,et al.  Water depollution using metal-organic frameworks-catalyzed advanced oxidation processes: A review. , 2017, Journal of hazardous materials.

[120]  R. Howe,et al.  Fe (III) Oxide-modified Indonesian Bentonite for Catalytic Photodegradation of Phenol in Water , 2017 .

[121]  Luca Demarchis,et al.  Photo-Fenton reaction in the presence of morphologically controlled hematite as iron source , 2015 .

[122]  Yaqi Cai,et al.  Continuous generation of hydroxyl radicals for highly efficient elimination of chlorophenols and phenols catalyzed by heterogeneous Fenton-like catalysts yolk/shell Pd@Fe3O4@metal organic frameworks. , 2018, Journal of hazardous materials.

[123]  C. Martínez-Huitle,et al.  Heterogeneous electro-Fenton and photoelectro-Fenton processes: A critical review of fundamental principles and application for water/wastewater treatment , 2018, Applied Catalysis B: Environmental.

[124]  A. Romero,et al.  Mineralization lumping kinetic model for abatement of organic pollutants using Fenton's reagent , 2010 .

[125]  Zhongping Yao,et al.  Design of a novel immobilized solid acid coating and its application in Fenton-like oxidation of phenol , 2017 .

[126]  M. Xing,et al.  Metal Sulfides as Excellent Co-catalysts for H2O2 Decomposition in Advanced Oxidation Processes , 2018, Chem.

[127]  I. Nambi,et al.  Assessment of meso scale zero valent iron catalyzed Fenton reaction in continuous-flow porous media for sustainable groundwater remediation , 2018 .

[128]  Fenglian Fu,et al.  The use of zero-valent iron for groundwater remediation and wastewater treatment: a review. , 2014, Journal of hazardous materials.

[129]  Xinwen Guo,et al.  Mesoporous graphitic carbon nitride functionalized iron oxides for promoting phenol oxidation activity , 2016 .

[130]  J. Guilemany,et al.  Solar photoelectrocatalytic degradation of Acid Orange 7 azo dye using a highly stable TiO2 photoanode synthesized by atmospheric plasma spray , 2013 .

[131]  M. Romero-Romo,et al.  A combined electrochemical-irradiation treatment of highly colored and polluted industrial wastewater , 2003 .

[132]  Limin Chen,et al.  Degradation of phenol using Fe3O4-GO nanocomposite as a heterogeneous photo-Fenton catalyst , 2016 .

[133]  M. Oturan,et al.  Regeneration of Activated Carbon Fiber by the Electro-Fenton Process. , 2018, Environmental science & technology.

[134]  E. M. Campo,et al.  Photo-Fenton oxidation of phenolic compounds catalyzed by iron-PILC , 2014 .

[135]  C. Martínez-Huitle,et al.  Electrocoagulation and advanced electrocoagulation processes: A general review about the fundamentals, emerging applications and its association with other technologies , 2017 .

[136]  H. Nakagawa,et al.  Influence of oxalic acid formed on the degradation of phenol by Fenton reagent. , 2012, Chemosphere.

[137]  Lizhi Zhao,et al.  Design of isolated iron species for Fenton reactions: lyophilization beats calcination treatment. , 2015, Chemical Communications.

[138]  E. Mousset,et al.  A new 3D-printed photoelectrocatalytic reactor combining the benefits of a transparent electrode and the Fenton reaction for advanced wastewater treatment , 2017 .

[139]  R. Bergamasco,et al.  Performance evaluation of different solar advanced oxidation processes applied to the treatment of a real textile dyeing wastewater , 2015, Environmental Science and Pollution Research.

[140]  Sergi Garcia-Segura,et al.  Influence of the water hardness on the performance of electro-Fenton approach: Decolorization and mineralization of Eriochrome Black T , 2016 .

[141]  K. Sapag,et al.  Raw montmorillonite modified with iron for photo-Fenton processes: influence of iron content on textural, structural and catalytic properties , 2017 .

[142]  J. R. Pliego,et al.  Theoretical study of the mechanism and regioselectivity of the alkylation reaction of the phenoxide ion in polar protic and aprotic solvents , 2018 .

[143]  K. Mae,et al.  Fenton•Cu2+ system for phenol mineralization , 2014 .

[144]  Yanbin Wang,et al.  Iron-copper bimetallic nanoparticles embedded within ordered mesoporous carbon as effective and stable heterogeneous Fenton catalyst for the degradation of organic contaminants , 2015 .

[145]  P. Westerhoff,et al.  Photon flux influence on photoelectrochemical water treatment , 2018 .

[146]  R. Resende,et al.  Facile synthesis of highly dispersed Fe(II)-doped g-C3N4 and its application in Fenton-like catalysis , 2017 .

[147]  Sang W. Joo,et al.  Modeling and optimization of photocatalytic/photoassisted-electro-Fenton like degradation of phenol using a neural network coupled with genetic algorithm , 2014 .

[148]  Chun Hu,et al.  Enhanced Fenton-catalytic efficiency by highly accessible active sites on dandelion-like copper–aluminum–silica nanospheres for water purification , 2016 .

[149]  S. Corrêa,et al.  Experimental and theoretical study on the reactivity of maghemite doped with Cu2+ in oxidation reactions: structural and thermodynamic properties towards a Fenton catalyst , 2016 .

[150]  M. A. Sanromán,et al.  Current advances and trends in electro-Fenton process using heterogeneous catalysts - A review. , 2018, Chemosphere.

[151]  Meng Nan Chong,et al.  Electrochemical oxidation remediation of real wastewater effluents — A review , 2018 .

[152]  E. Mousset,et al.  Electrocatalytic phenol degradation by a novel nanostructured carbon fiber brush cathode coated with graphene ink , 2017 .

[153]  Ying Liu,et al.  Heterogeneous Fenton catalytic degradation of phenol based on controlled release of magnetic nanoparticles , 2014 .

[154]  Carlos Díaz-Uribe,et al.  Photo-Fenton oxidation of phenol with Fe(III)-tetra-4-carboxyphenylporphyrin/SiO2 assisted with visible light , 2014 .

[155]  Mingjie Jin,et al.  Magnetically separable maghemite/montmorillonite composite as an efficient heterogeneous Fenton-like catalyst for phenol degradation , 2016, Environmental Science and Pollution Research.

[156]  W. Daud,et al.  Review on the main advances in photo-Fenton oxidation system for recalcitrant wastewaters , 2015 .

[157]  G. Zeng,et al.  Photocatalytic degradation of phenol by the heterogeneous Fe3O4 nanoparticles and oxalate complex system , 2014 .

[158]  Y. Kawase,et al.  Hydroxyl radical generation in the photo-Fenton process: Effects of carboxylic acids on iron redox cycling , 2015 .

[159]  H. García,et al.  Influence of the preparation procedure on the catalytic activity of gold supported on diamond nanoparticles for phenol peroxidation. , 2011, Chemistry.

[160]  M. Minella,et al.  Photo-Fenton oxidation of phenol with magnetite as iron source , 2014 .

[161]  Honghai Wu,et al.  Efficient degradation of phenol using iron-montmorillonite as a Fenton catalyst: Importance of visible light irradiation and intermediates. , 2017, Journal of hazardous materials.

[162]  Xinliang Liu,et al.  Effective removal of phenol by using activated carbon supported iron prepared under microwave irradiation as a reusable heterogeneous Fenton-like catalyst , 2017 .

[163]  Sergi Garcia-Segura,et al.  Mineralization of the recalcitrant oxalic and oxamic acids by electrochemical advanced oxidation processes using a boron-doped diamond anode. , 2011, Water research.

[164]  C. Chen,et al.  A highly active bimetallic oxides catalyst supported on Al-containing MCM-41 for Fenton oxidation of phenol solution , 2011 .

[165]  R. Reis,et al.  Low tungsten content of nanostructured material supported on carbon for the degradation of phenol , 2013 .

[166]  E. Mousset,et al.  Physico-chemical properties of pristine graphene and its performance as electrode material for electro-Fenton treatment of wastewater , 2016 .

[167]  J. M. Grau,et al.  Highly dispersed Fe3+-Al2O3 for the Fenton-like oxidation of phenol in a continuous up-flow fixed bed reactor. Enhancing catalyst stability through operating conditions , 2018, Applied Catalysis B: Environmental.

[168]  F. Anaissi,et al.  Phenol degradation using the mixed material clay/Fe immobilized on glass slides , 2014, Environmental Science and Pollution Research.

[169]  Zhengguo Zhang,et al.  Grafting Fe(III) species on carbon nanodots/Fe-doped g-C3N4 via interfacial charge transfer effect for highly improved photocatalytic performance , 2017 .

[170]  Jinping Jia,et al.  Hydrophilic mesoporous carbon as iron(III)/(II) electron shuttle for visible light enhanced Fenton-like degradation of organic pollutants , 2018, Applied Catalysis B: Environmental.

[171]  Jixian Yang,et al.  Iron-foam as a heterogeneous catalyst in the presence of tripolyphosphate electrolyte for improving electro-Fenton oxidation capability , 2018 .

[172]  D. Dionysiou,et al.  Aligned α-FeOOH nanorods anchored on a graphene oxide-carbon nanotubes aerogel can serve as an effective Fenton-like oxidation catalyst , 2017 .

[173]  B. Ondruschka,et al.  Oxidative degradation of chlorophenol derivatives promoted by microwaves or power ultrasound: a mechanism investigation , 2010, Environmental science and pollution research international.

[174]  Hanqing Yu,et al.  Electrochemically Catalytic Degradation of Phenol with Hydrogen Peroxide in Situ Generated and Activated by a Municipal Sludge-Derived Catalyst , 2018 .

[175]  J. Garrido,et al.  Catalytic effect of Fe2+, Cu2+ and UVA light on the electrochemical degradation of nitrobenzene using an oxygen-diffusion cathode , 2004 .

[176]  L. Frunzo,et al.  A complete phenol oxidation pathway obtained during electro-Fenton treatment and validated by a kinetic model study , 2016 .

[177]  Jixian Yang,et al.  The synergistic effect of nickel-iron-foam and tripolyphosphate for enhancing the electro-Fenton process at circum-neutral pH. , 2018, Chemosphere.

[178]  Yi Zhang,et al.  Synthesis of α-Fe2O3/TiO2 nanotube arrays for photoelectro-Fenton degradation of phenol , 2012 .

[179]  K. Palanivelu,et al.  Degradation of phenol and trichlorophenol by heterogeneous photo-Fenton process using Granular Ferric Hydroxide®: comparison with homogeneous system , 2016, International Journal of Environmental Science and Technology.

[180]  Jian Chen,et al.  LED revolution: fundamentals and prospects for UV disinfection applications , 2017 .

[181]  C. Bengoa,et al.  Zero-valent iron supported on nitrogen-doped carbon xerogel as catalysts for the oxidation of phenol by fenton-like system , 2018, Environmental technology.

[182]  Belén Ferrer,et al.  Iron oxide nanoparticles supported on diamond nanoparticles as efficient and stable catalyst for the visible light assisted Fenton reaction , 2018, Applied Catalysis B: Environmental.

[183]  Jianfeng Chen,et al.  Degradation of phenol by ozone in the presence of Fenton reagent in a rotating packed bed , 2013 .

[184]  F. Stüber,et al.  Effect of activated carbon surface chemistry on the activity of ZVI/AC catalysts for Fenton-like oxidation of phenol , 2015 .

[185]  J. Casas,et al.  Naturally-occurring iron minerals as inexpensive catalysts for CWPO , 2017 .

[186]  Limin Chang,et al.  Electrochemical degradation of phenol in aqueous solution using PbO2 anode , 2013 .

[187]  F. García-Ochoa,et al.  Catalytic wet oxidation of phenol on active carbon: stability, phenol conversion and mineralization , 2005 .

[188]  Hongtao Yu,et al.  Enhanced heterogeneous Fenton-like activity by Cu-doped BiFeO3 perovskite for degradation of organic pollutants , 2018, Frontiers of Environmental Science & Engineering.

[189]  Jeesu Park,et al.  Oxalate-TiO2 complex-mediated oxidation of pharmaceutical pollutants through ligand-to-metal charge transfer under visible light , 2018, Chemical Engineering Journal.

[190]  A. Mohan,et al.  Fe3O4 nanoparticle-encapsulated mesoporous carbon composite: An efficient heterogeneous Fenton catalyst for phenol degradation , 2018, Environmental Science and Pollution Research.

[191]  J. Zhan,et al.  Cu2O@β-cyclodextrin as a synergistic catalyst for hydroxyl radical generation and molecular recognitive destruction of aromatic pollutants at neutral pH. , 2018, Journal of hazardous materials.

[192]  Lianjun Wang,et al.  Synthesis of Cu2O–CuFe2O4 microparticles from Fenton sludge and its application in the Fenton process: the key role of Cu2O in the catalytic degradation of phenol , 2018, RSC advances.

[194]  M. Xing,et al.  An advanced TiO2/Fe2TiO5/Fe2O3 triple-heterojunction with enhanced and stable visible-light-driven fenton reaction for the removal of organic pollutants , 2017 .

[195]  M. Xing,et al.  Enhancement of H2O2 Decomposition by the Co-catalytic Effect of WS2 on the Fenton Reaction for the Synchronous Reduction of Cr(VI) and Remediation of Phenol. , 2018, Environmental science & technology.

[196]  W. Cai,et al.  Preparation of magnetic zeolite γ-Fe2O3/TS-1 with core/shell structure and application in photocatalytic degradation , 2015 .

[197]  J. Weisburger.  Mutagenic, Carcinogenic, and Chemopreventive Effects of Phenols and Catechols: The Underlying Mechanisms , 1992 .

[198]  C. Luca,et al.  Alumina Supported Fenton-Like Systems for the Catalytic Wet Peroxide Oxidation of Phenol Solutions , 2012 .

[199]  F. Desogus,et al.  The enhancing effect of low power microwaves on phenol oxidation by the Fenton process , 2013 .

[200]  J. Crittenden,et al.  Novel RGO/α-FeOOH supported catalyst for Fenton oxidation of phenol at a wide pH range using solar-light-driven irradiation. , 2017, Journal of hazardous materials.

[201]  Q. Sun,et al.  Iron phthalocyanine-graphene donor-acceptor hybrids for visible-light-assisted degradation of phenol in the presence of H2O2 , 2016 .

[202]  Zhongping Yao,et al.  Green synthesis of a dendritic Fe3O4 @Feo composite modified with polar C-groups for Fenton-like oxidation of phenol , 2018 .

[203]  Sergi Garcia-Segura,et al.  Applied photoelectrocatalysis on the degradation of organic pollutants in wastewaters , 2017 .

[204]  L. Devi,et al.  Photocatalytic activity of SnO2–α-Fe2O3 composite mixtures: exploration of number of active sites, turnover number and turnover frequency , 2018 .

[205]  N. Villota,et al.  Effect of ultrasonic waves on the water turbidity during the oxidation of phenol. Formation of (hydro)peroxo complexes. , 2017, Ultrasonics sonochemistry.

[206]  Min Gyu Kim,et al.  Kinetic study for phenol degradation by ZVI-assisted Fenton reaction and related iron corrosion investigated by X-ray absorption spectroscopy. , 2016, Chemosphere.

[207]  Mingce Long,et al.  Magnetically separable mesoporous silica nanocomposite and its application in Fenton catalysis , 2011 .

[208]  I. Nambi,et al.  Low temperature synthesis of highly stable and reusable CMC-Fe2+(-nZVI) catalyst for the elimination of organic pollutants , 2016 .

[209]  Leila Roshanfekr Rad,et al.  Optimization of the combined adsorption/photo-Fenton method for the simultaneous removal of phenol and paracetamol in a binary system , 2015 .

[210]  Sergi Garcia-Segura,et al.  Degradation of the antibiotic trimethoprim by electrochemical advanced oxidation processes using a carbon-PTFE air-diffusion cathode and a boron-doped diamond or platinum anode , 2014 .

[211]  M. Minella,et al.  Considerable Fenton and photo-Fenton reactivity of passivated zero-valent iron , 2016 .

[212]  J. Casas,et al.  Improving the Fenton process by visible LED irradiation , 2016, Environmental Science and Pollution Research.

[213]  Ya Xiong,et al.  Enhancement effect in the piezoelectric degradation of organic pollutants by piezo-Fenton process , 2017 .

[214]  E. Mousset,et al.  Electro-Fenton for control and removal of micropollutants - process optimization and energy efficiency. , 2016, Water science and technology : a journal of the International Association on Water Pollution Research.

[215]  D. Cazorla-Amorós,et al.  Ferrosilicate-Based Heterogeneous Fenton Catalysts: Influence of Crystallinity, Porosity, and Iron Speciation , 2018, Catalysis Letters.

[216]  H. García,et al.  Optimized water treatment by combining catalytic Fenton reaction using diamond supported gold and biological degradation , 2011 .

[217]  A. Borges,et al.  Phenol degradation by Fenton-like process , 2016, Environmental Science and Pollution Research.

[218]  Z. Shariatinia,et al.  Synthesis of novel CuO/LaFeO 3 nanocomposite photocatalysts with superior Fenton-like and visible light photocatalytic activities for degradation of aqueous organic contaminants , 2018, Separation and Purification Technology.

[219]  R. R. Navarro,et al.  Ferrite formation from photo-Fenton treated wastewater. , 2010, Chemosphere.

[220]  Yunwen Wu,et al.  FeOOH quantum dots coupled g-C3N4 for visible light driving photo- Fenton degradation of organic pollutants , 2018, Applied Catalysis B: Environmental.

[221]  B. Hameed,et al.  Degradation of phenol in photo-Fenton process by phosphoric acid modified kaolin supported ferric-oxalate catalyst: Optimization and kinetic modeling , 2012 .

[222]  E. Contreras,et al.  Catalyst reutilization in phenol homogeneous cupro-Fenton oxidation , 2014 .

[223]  M. I. Pariente,et al.  Low-cost Fe/SiO2 catalysts for continuous Fenton processes , 2017 .

[224]  M. Azzouzi,et al.  Mixed α-Fe2O3/Bi2WO6 oxides for photoassisted hetero-Fenton degradation of Methyl Orange and Phenol , 2017 .

[225]  I. Angelidaki,et al.  Bio-electro-Fenton processes for wastewater treatment: Advances and prospects , 2018, Chemical Engineering Journal.

[226]  Karuppan Muthukumar,et al.  A review on Fenton and improvements to the Fenton process for wastewater treatment , 2014 .

[227]  S. Abderrahmane,et al.  Efficient degradation of phenol using natural clay as heterogeneous Fenton-like catalyst , 2014, Environmental Science and Pollution Research.

[228]  Rongshu Zhu,et al.  Novel synthesis of magnetic, porous C/ZnFe2O4 photocatalyst with enhanced activity under visible light based on the Fenton-like reaction. , 2017, Dalton transactions.

[229]  P. Westerhoff,et al.  Catalytic Converters for Water Treatment. , 2019, Accounts of chemical research.

[230]  X. Bian,et al.  Catalytic oxidation of phenol in wastewater — A new application of the amorphous Fe78Si9B13 alloy , 2012 .

[231]  Hong Jiang,et al.  Composite Fe2O3 and ZrO2/Al2O3 photocatalyst: Preparation, characterization, and studies on the photocatalytic activity and chemical stability , 2012 .

[232]  R. Rosal,et al.  Coagulation-Fenton coupled treatment for ecotoxicity reduction in highly polluted industrial wastewater. , 2010, Journal of hazardous materials.

[233]  A. Amrane,et al.  Phenol removal by a sequential combined fenton-enzymatic process , 2017 .

[234]  S. Navalón,et al.  Silver Nanoparticles Supported on Diamond Nanoparticles as a Highly Efficient Photocatalyst for the Fenton Reaction under Natural Sunlight Irradiation , 2015 .

[235]  Longlu Wang,et al.  Fe1-xZnxS ternary solid solution as an efficient Fenton-like catalyst for ultrafast degradation of phenol. , 2018, Journal of hazardous materials.

[236]  Zhongping Yao,et al.  A facile preparation of hierarchical dendritic zero-valent iron for Fenton-like degradation of phenol , 2017 .

[237]  J. Peralta-Hernández,et al.  Application of solar photoelectro-Fenton technology to azo dyes mineralization: Effect of current density, Fe2+ and dye concentrations , 2011 .

[238]  J. Toufaily,et al.  Iron-impregnated zeolite catalyst for efficient removal of micropollutants at very low concentration from Meurthe river , 2018, Environmental Science and Pollution Research.

[239]  N. Villota,et al.  Changes of turbidity during the phenol oxidation by photo-Fenton treatment , 2014, Environmental Science and Pollution Research.

[240]  H. García,et al.  Gold on diamond nanoparticles as a highly efficient Fenton catalyst. , 2010, Angewandte Chemie.

[241]  Ling Wu,et al.  Trinuclear iron cluster intercalated montmorillonite catalyst: Microstructure and photo-Fenton performance , 2011 .

[242]  Lili Jiang,et al.  Ultrahigh yield of hydrogen peroxide on graphite felt cathode modified with electrochemically exfoliated graphene , 2017 .

[243]  Lihua Zhu,et al.  Efficient visible light photo-fenton-like degradation of organic pollutants using in situ surface-modified BiFeO3 as a catalyst. , 2013, Journal of environmental sciences.