electro-Fenton Technology Research Articles

Enhanced heterogeneous electro-Fenton process for degradation of rhodamine B: FeOCl/CF@AB composite cathode with superior efficiency and sustainability

With the growing environmental concerns and increasing demand for clean energy, the synthesis of Stable and efficient heterogeneous Electro-Fenton catalysts gains significant attention in the market. We present a novel FeOCl/CF@AB composite cathode designed for efficient heterogeneous electro-Fenton degradation of rhodamine B. The composite cathode exhibits remarkable catalytic performance, outperforming the raw carbon felt electrode, and achieving significantly higher rhodamine B degradation rates. The incorporation of acetylene black encapsulation provides excellent stability, preserving the FeOCl active sites from corrosion and ensuring sustained catalytic activity even after multiple reuse cycles. The electron penetration mechanism on the FeOCl/CF@AB cathode is elucidated through density functional theory calculations, revealing spontaneous O2 activation and H2O2 generation. Electron transfer between Fe(II) species and the acetylene black shell facilitates these processes. The presence of •OH species supports the degradation of rhodamine B to intermediates and mineralization to CO2 and H2O. Furthermore, LC-MS analysis unveils the detoxification effect of the electro-Fenton process with FeOCl/CF@AB, presenting reduced developmental toxicity of degradation intermediates. Economic cost analysis demonstrates the feasibility and cost-effectiveness of the FeOCl/CF@AB cathode for large-scale wastewater treatment applications. In conclusion, the FeOCl/CF@AB composite cathode showcases stability and efficiency, offering a promising and sustainable electro-Fenton technology for dye wastewater treatment.

Preparation of particle electrodes for landfill leachate treatment by doping Cu2+-modified needle coke with Fe-based oxides extracted from iron tailings

Landfill leachate is a typically difficult-to-degrade organic wastewater that, if not treated properly will cause serious harm to human health and the ecological environment. Three-dimensional electro-Fenton (3DEF) technology has received widespread attention because of its high mass transfer efficiency and current utilisation, and no secondary pollution. In this study, the Fe/Cu-loaded needle coke particle electrode (Fe/Cu-NCPE) was prepared, using which a 3DEF system was constructed with DSA as the anode and Ni/ACF as the cathode to treat mature landfill leachate. The optimal preparation conditions of the Fe/Cu-NCPE were obtained as Cu2+-modified needle coke: Fe-based oxides: binder = 32:8:15, particle size of 5 ± 0.5 mm, and Cu2+ loading of 3 %. The spectral analysis shows that the Fe/Cu-NCPE prepared in this study is a kind of particle electrode with superior performance and good stability. The optimum conditions for treating landfill leachate at an applied voltage of 9 V, an initial pH of 2, and a Fe/Cu-NCPE dosage of 25 g/L resulted in the removal of COD, colour, TN, and NH3-N of 94.2 %, 99 %, 90.3 %, and 93.8 %, respectively. In the 3DEF system for landfill leachate treatment, H2O2 is generated at the cathode and polarized Fe/Cu-NCPE surface, which is activated by loaded Fe2+ and Cu+ in a Fenton(-like) reaction to produce •OH; Meanwhile active chlorine is generated by anodic electrocatalytic oxidation of Cl-. They attack humic acid and other organics in the wastewater as well as nitrogenous reductive substances to degrade them.

Levofloxacin degradation in a heterogeneous electro-Fenton system with an FeOCl/MoS2 composite catalyst

To overcome the drawbacks of traditional electro-Fenton (EF) technology, such as acidic conditions (pH 3–4) and the extensive leaching of Fe ions, FeOCl/MoS2 composites were synthesized through a simple calcination method.

Microcystis aeruginosa Removal and Simultaneous Control of Algal Organic Matter (AOM) Release Using an Electro-Flocculation–Electro-Fenton (EC-EF) System without Chemical Addition

Harmful cyanobacterial blooms pose a serious environmental threat to global water ecology and drinking water safety. Microcystis aeruginosa, a dominant cyanobacterial species in cyanobacterial blooms, was removed using the electro-flocculation–electro-Fenton (EC-EF) technology. In the EC-EF system, the iron anode was used as a sacrificial anode to produce iron ions in situ. Combining the aeration device with the graphite felt cathode as one unit realizes a direct and effective air supply to the cathode, and improves the electrical Fenton efficiency for generating oxidizing groups such as hydroxyl radicals. The cyanobacteria removal efficiency was up to 94.6% under optimal process conditions with a current density of 1.08 mA/cm2, an electrolysis time of 5 min, and an aeration flow rate of 0.06 L·min−1. At the same time, the microcystins (MCs) and total organic carbon (TOC) content in the water were controlled. The mechanism of cyanobacterial cell removal using this EC-EF system was investigated via characterization of cyanobacterial cells and flocs and cell membrane permeability analysis. The moderate oxidation and iron hydroxide encapsulation of this system are both beneficial to maintaining the integrity of cyanobacterial cells. The results demonstrated that EC-EF is a chemical-free and eco-friendly cyanobacteria removal technology.

(Digital Presentation) Electrochemical Study of Mxene-Metal Oxide Composites for the Degradation of PVC-Based Microplastics

Microplastics (MPs) are fragments of any type of plastic less than 5mm in length, and it is harmful to our ocean and aquatic life. In recent years, the prevalence of MPs in aquatic environments has grown to be a serious environmental problem that has recently gained lots of attention [1, 2]. However, there is still a lack of studies on electrocatalytic treatment for an effective breakdown of MPs [3]. Here, Mxene-Metaloxide composites modified graphite electrode-based electro-fenton (EF) technology has been proposed to break down polyvinyl chloride (PVC) MPs. Advanced oxidation processes are widely studied and applied for the decomposition of MPs. Hydroxyl radicals (•OH) were generated by the electro-oxidation (EO) and electro-peroxidation (EO- ) process which has exhibited great capability for catalytic degradation of MPs and converted into H2O and CO2.In this work, electro-oxidation was carried out in a three-electrode system with an oxygen-saturated environment where Mxene-Metaloxide composites modified graphite electrode, graphite electrode, and Ag/AgCl electrode were used as a working electrode, counter electrode, and reference electrode respectively. Different operating parameters such as electrolyte type, electrolyte concentration, temperature, and reaction time were maintained for EO. Cyclic voltammetry was employed to analyze the catalytic performance of the MXene-TiO2/C modified graphite electrode in the context of the Oxygen Reduction Reaction. The obtained results revealed that the EO process can degrade 54.5% of MPs after potentiostatic electrolysis at -0.7V Ag/AgCl at 80 °C for 6 hours. Fig 1 presents the removal efficiency of PVC MPs in 0.05M Na2SO4 solution. The results from scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), UV-Vis spectroscopy, and Energy dispersive X-ray spectroscopy (EDX) revealed that the MPs degraded directly into CO2 and H2O. The results of this research showed that such a heterogeneous EF-like technology using Mxene-metal oxide composites modified graphite electrode was hoped to give an eco-friendly technique for treating MPs in wastewater.

Study on the mechanisms of DMP degradation by electro-Fenton method modified by single atomic-Co doped carbon-based catalyst

Electro-Fenton technology is an advanced oxidation process for phthalic acid esters (PAEs) that builds upon traditional Fenton technology, enhancing its efficiency, selectivity, and flexibility. Thus, cobalt-doped carbon-based catalyst (Co@NSC) were prapered via melamine doped by cobalt (Co) and calcinated at high temperature, and showed excent mesoporous structure (mainly range from 1.3 to 16 nm), high surface area (223.26 m2/g) and big pore volume (0.392 cm3/g). And the result of electrochemical performance test showed that the two-electron oxygen reduction ability of the material can be effectively improved in the case of Co doping. DMP can be degraded within 30 min by using Co@NSC as an electro-Fenton cathode, with excellent degradation efficiency (100 %) and total organic carbon (TOC) mineralization rate (about 40 %) even under the optimal conditions. The exploration of the mechanism demonstrated that OH and 1O2 were the main contributors. According to density functional theory (DFT) theoretical calculation and liquid chromatograph-mass spectrometer(LC-MS) results, the vulnerable site and degradation path of DMP were reasonably speculated. The ecotoxicity evaluation of the degradation products showed that the the toxicity of DMP has been significantly reduced during degradation process by Co@NSC electro-Fenton. Thus, Co@NSC is a cost-effective and promising catalyst, in which all the metal sites were utilized while the cost of metal were significantly minimized.

Electro-Fenton technology for dairy wastewater treatment

Electro-Fenton technology for dairy wastewater treatment

AN OVERVIEW OF ELECTRO-FENTON TECHNOLOGY FOR ORGANIC WASTEWATER TREATMENT: OPTIMAL CONDITIONS AND ELECTRODES SELECTION

Several conventional methods have been employed to eliminate numerous types of pollutants from domestic and industrial wastewater. Electrochemical techniques are one of these treatment methods used in wastewater treatment. Electro-Fenton technology (EFT) is one type of electrochemical technique. The present review paper aims to provide readers with extensive information about the EFT general definitions, terminologies, mechanisms, fundamental conditions, and statistical analysis based on the published articles for the recent years. The core findings of this work proved that the EFT is more applicable for removing organic contaminants than inorganic ones because of the affinity degree between the adsorbents formed in the reactor and the pollutants. The most important conditions of this technology are the type of anode, the applied current, and the period of the treatment process. The development of the conventional cathode electrode was the most interested field in the literature. The advantages of EFT provide the ability to perform it as a primary or secondary treatment process with other conventional treatment processes. The statistical analysis shows that 68% of the selected cited articles achieved a high performance of EFT when it has performed alone while 32% of these cited articles attained the best performance of EFT in the integrated system with other technologies. The electro-Fenton method is a promising technology to treat wastewater, especially that involving organic pollutants

Comprehensive analysis of research trends and prospects in electrochemical advanced oxidation processes (EAOPs) for wastewater treatment

Electrochemical advanced oxidation processes (EAOPs) have emerged as a promising approach for efficient wastewater treatment. However, despite their promising potential, there is a lack of comprehensive analysis regarding the research trends, bibliometric data, and research frontiers of EAOPs. To address this gap, this study conducted a thorough and comprehensive analysis of 2347 related articles in the Web of Science Core Collection Database from 2012 to 2022. The analysis included information on countries, authors, institutions, and more, with a focus on summarizing trends and cutting-edge research hotspots in the field. The University of Barcelona in Spain is the most effective institution. Brillas E. is the most productive author in the world. Research hotspots in EAOPs have evolved from traditional anodic oxidation (AO) to novel electro-Fenton (EF) technology, which focuses on efficient generation of H2O2 and the use of metal-organic frameworks to enhance performance and efficiency. Through systematic research hotspot analysis, the importance of performance comparison of different types of EAOPs, development of new materials, optimization of device parameters, and toxicity assessment of byproducts is highlighted. Concurrently, the rise and mechanisms of emerging EAOPs are predicted and analyzed. Finally, future research on EAOPs technologies should focus on technological coupling, development of new materials, reduction of energy consumption and cost, evaluation and minimization of toxicity, and exploration of green renewable energy sources for larger-scale applications in wastewater treatment pilot plants. In this way, these technologies can contribute to the sustainability of larger industrial wastewater treatment applications and make an important contribution to environmental protection and scientific and technological progress.

Performance Study of ACET/PTFE Modified Graphite Felt Electrode for Electrocatalytic H2O2 Reaction

Multiphase electro-Fenton is considered as a promising technology for the degradation of organic pollutants, and in order to ensure its effectiveness and to make it cheaper and easier, this study develops novel cathodes for in situ H2O2 generation. Graphite felt (RGF) modified by acetylene black (ACET)/polytetrafluoroethylene (PTFE) was selected to prepare a superhydrophobic electrode (APGF), and the effects of each factor of ACET:PTFE, oxygen flux, and current density on the production of H2O2 were investigated, and the rate of H2O2 production under the optimized conditions of the experiment was 35.96 mg h−1 cm−2 which can meet the requirements of Electro-Fenton technology. The physicochemical characterization of RGF and APGF electrodes was analyzed, and the electrocatalytic performance was evaluated by using an electrochemical workstation to test APGF (7:1 ∼ 1:3). Probing the mechanism analysis, the APGF electrode surface is hydrophobic and the C/F functional groups synergize to increase the reactive sites and improve the reactivity and selectivity. Dissolved oxygen in the electrolyte diffused to the active center on the cathode surface escaped from the liquid phase, forming a new phase with bubble adsorption for easier activation, and e-conjugated H+ to produce *OOH intermediates, and then e-conjugated H+ to obtain H2O2.

The strategy to promote the degradation of phenol by electro-Fenton: The synergistic effect of N-doping and electrode aeration promotes the adsorption capacity of activated carbon cathode and Fe2+/Fe3+ cycle

The efficient cycle of Fe2+/Fe3+ is an important factor for the effective generation of ·OH in the electro-Fenton system. The mismatch between pollutant concentration and ·OH concentration is the key reason for the low utilization rate of ·OH in the electro-Fenton system. Improving the simultaneous adsorption capacity of cathode for Fe3+ and phenol is the key to improve the generation rate and utilization rate of ·OH. However, there is a competitive adsorption between Fe3+ and phenol. Therefore, the effects of N-doping and electrode aeration (EA) on the adsorption performance of activated carbon cathode, Fe2+/Fe3+ cycle and phenol degradation in electro-Fenton system were studied by experiments and characterization. The results showed that the adsorption capacity of NGAC-EA for Fe3+ and phenol increased by 27.57 % and 31.82 %, respectively. N-doping and EA significantly promoted the Fe2+/Fe3+ cycle. The electro-Fenton system of NGAC-EA group could quickly remove 40.445 mg/L phenol within 180 min, which was 1.42 times that of GAC-SA (28.5 mg/L). N-doping can provide suitable pore structure and a large number of adsorption sites for activated carbon, and promote the transfer of electrons in the external circuit. EA can improve the mass transfer of the solution. The synergistic effect of N-doping and EA can maximize the degradation effect of the electro-Fenton system. This study provides a new direction and theoretical guidance for the development of electro-Fenton technology, which can encourage the academic community to devote themselves to operable and practical academic research.

Efficient electro-Fenton processes on a novel self-supported single-atom Fe electrode: Mechanism and practical application

Electro-Fenton technology is widely applied in the field of water treatment for refractory organic pollutant degradation. Herein, a novel self-supported single-atom Fe electrode was fabricated via simple electrodeposition and pyrolysis approach for the first time. The prepared single-atom electrode showed excellent activity and stability for degradation of aromatic compounds in electro-Fenton (EF) process, in which the 4-hydroxybenzoic acid (4-HBA) pollutant is completely decomposed by the substitution, decarboxylation, hydroxylation, and oxidation reactions. Significantly, the electrode possessed great performance for purification of the shale gas fracturing flowback fluid. The degradation pathways of organics in real matrix were also studied in detail. The characterization analysis proved that the single-atom Fe was in situ grown on electrode surface, confirming to be Fe-N/O construction with coordination number of ∼4.3. Therefore, the EF mechanism was preliminary proposed by analyzing all possible configurations of single-atom Fe (FeN4, FeN3O1, FeN2O2, and FeN1O3). Results implied that the FeN2O2 structure may contribute to improving EF performance by enhancing the O2 adsorption and promoting the breakage of *OOH to form H2O2. Additionally, the good adsorption of FeN2O2 toward organic pollutant was also greatly conducive to the EF degradation. This study provides a feasible strategy for self-supported single-atom Fe electrode and demonstrated its application for efficient EF treatment of real wastewater.

Three-dimensional heterogeneous electro-Fenton system with reduced graphene oxide based particle electrode for Acyclovir removal

New pollutant pharmaceutical and personal care products (PPCPs), especially antiviral drugs, have received increasing attention not only due to their increase in usage after the outbreak of COVID-19 epidemics but also due to their adverse impacts on water ecological environment. Electro-Fenton technology is an effective method to remove PPCPs from water. Novel particle electrodes (MMT/rGO/Fe3O4) were synthesized by depositing Fe3O4 nanoparticles on reduced graphene oxide modified montmorillonite and acted as catalysts to promote oxidation performance in a three-dimensional electro-Fenton (3D-EF) system. The electrodes combined the catalytic property of Fe3O4, hydrophilicity of montmorillonite and electrical conductivity of graphene oxides, and applied for the degradation of Acyclovir (ACV) with high efficiency and ease of operation. At optimal condition, the degradation rate of ACV reached 100% within 120 min, and the applicable pH range could be 3 to 11 in the 3D-EF system. The stability and reusability of MMT/rGO/Fe3O4 particle electrodes were also studied, the removal rate of ACV remained at 92% after 10 cycles, which was just slightly lower than that of the first cycle. Potential degradation mechanisms were also proposed by methanol quenching tests and FT-ICR-MS.

Highly efficient heterogeneous electro-Fenton degradation of organic pollutants using a FeNi-OH/NF cathode

The electro-Fenton (EF) technology provided a promising way to degrade organic pollutants by in-situ producing H2O2 and decomposing it into hydroxyl radicals (OH). However, the degradation rate is restricted by the two-electron oxygen reduction reaction (ORR) rate of H2O2 generation and the production efficiency of OH, and the efficient EF cathode is important. Herein, we designed an efficient heterogeneous EF system with a Fe-doped β-Ni(OH)2 nanosheets/nickel foam (FeNi-OH/NF) cathode for phenol removal in water. FeNi-OH enhanced the electrochemically active area for H2O2 production and produced OH for pollutant degradation. The FeNi-OH/NF cathode demonstrates excellent heterogeneous EF catalytic activity with a degradation efficiency of phenol (99.4%) and total organic carbon (67.4%) in 2 h. The experiments and density functional theory (DFT) calculations further confirmed that the Fe-doped β-Ni(OH)2 on the nickel foam enhanced H2O2 adsorption and accelerated Fe3+/Fe2+ circulation, promoting the reaction of H2O2 with Fe2+ to produce OH for phenol degradation. This study provides a novel and efficient heterogeneous EF cathode for accelerating pollutant degradation securely and quickly.

Metal-organic frameworks (MOFs) as efficient catalysts for electro-Fenton (EF) reactions: Current progress and prospects

As a type of coordination polymer, metal–organic frameworks (MOFs) have attracted extensive attention due to their large specific surface area, adjustable pore size and high porosity. Electro-Fenton (EF) technology is an environmentally-friendly and efficient advanced oxidation process (AOPs) degradation technology, which has also received extensive attention. Therefore, the paper systematically reviews the applications of MOFs in EF systems. Firstly, the advantages and disadvantages of homogeneous and heterogeneous EF were generalized, and the influencing factors of EF system (i.e., electrode, pH, current density, conductivity) were summarized. Secondly, different series of MOFs (i.e., zeolite imidazole framework (ZIF), materials of institute lavoisier frameworks (MIL) and universitetet i oslo (UIO)) were introduced. Then, the methods to improve the catalytic activity and water stability of MOFs were also described. Finally, the future application of MOFs in EF systems is prospected, which provides a detailed summary and foreshadowing for future research in this direction.

Treatment of spent caustic wastewater by electro-Fenton process: Kinetics and cost analysis

Spent caustic is a highly contaminated wastewater from critical industries with complicated chemistry and different environmental adverse effects. Conventional wastewater remediation approaches are not effective enough for the remediation of spent caustic. Hence in this study, Electro-Fenton (EF) technology as a subsection of Advanced Oxidation Processes (AOPs) was applied for the removal of chemical oxygen demand (COD) in spent caustic effluent. For statistical analysis and experimental design of each factor including H2O2/COD, current density, pH, and treatment time on the COD removal (response), the Box Behnken Design (BBD) was used. The optimal conditions for operating factors were as the following: H2O2/COD = 0.73, pH= 5.46, current density = 18.83 mA/cm2 and treatment time= 69.88 min. In these conditions, the actual and predicted COD removal was 93.0% and, 94.38%, respectively. Finally, it concludes that Electro-Fenton technology was reliable and outstandingly efficient for COD removal in spent caustic wastewater. The kinetic studies confirmed that the removal of COD tracked the first-order kinetic model and the constant reaction rate and half-life of COD removal kinetic were 0.0257 min−1 and 27 min, respectively. The operating costs analysis showed that the Electro-Fenton process had lower operating costs and it can be a good opportunity for the treatment of spent caustic wastewater on an industrial scale. The operational cost for this process was found to be 1.562$ M−3kg−1COD removal.

Treatment of gaseous streams polluted with H2S: Comparison of electrolytic and electro-Fenton assisted absorption processes

H2S is a gaseous compound that contributes to air pollution. In this work, the electrochemical oxidation treatment of gaseous streams polluted with H2S is evaluated using a jet mixer and electrochemical cell device, in which the performance of electrolytic and electro-Fenton assisted absorption processes are compared. Results demonstrate the feasibility of both processes to remove H2S, reaching coulombic efficiencies of nearly 100% in the electrolytic assisted absorption, and 70–80% in the electro-Fenton assisted absorption. Aqueous solutions containing phosphate salts as electrolyte were found to be suitable as absorbents for the process. Efficiency in the cathodic production of H2O2 in these solutions using the experimental device was found to be as high as 32.8% (1.184 mgH2O2/min) at 12 °C and atmospheric pressure. Sequential formation of SO2 and SO3 is obtained by the oxidation of H2S contained in the gas. These species are hydrolysed, and a part remained in the absorbent as SO32− and SO42−, while the rest is dragged in the outlet gas. SO3 production is promoted by electrolytic assisted absorption and polysulphides by the electro-Fenton technology. Low concentrations of elemental sulphur are detected in the solid suspensions formed during the process.

Challenges and Future Roadmaps in Heterogeneous Electro-Fenton Process for Wastewater Treatment.

The efficiency of heterogeneous electro-Fenton technology on the degradation of recalcitrant organic pollutants in wastewater is glaringly obvious. This green technology can be effectively harnessed for addressing ever-increasing water-related challenges. Due to its outstanding performance, eco-friendliness, easy automation, and operability over a wide range of pH, it has garnered significant attention from different wastewater treatment research communities. This review paper briefly discusses the principal mechanism of the electro-Fenton process, the crucial properties of a highly efficient heterogeneous catalyst, the heterogeneous electro-Fenton system enabled with Fe-functionalized cathodic materials, and its essential operating parameters. Moreover, the authors comprehensively explored the major challenges that prevent the commercialization of the electro-Fenton process and propose future research pathways to countervail those disconcerting challenges. Synthesizing heterogeneous catalysts by application of advanced materials for maximizing their reusability and stability, the full realization of H2O2 activation mechanism, conduction of life-cycle assessment to explore environmental footprints and potential adverse effects of side-products, scale-up from lab-scale to industrial scale, and better reactor design, fabrication of electrodes with state-of-the-art technologies, using the electro-Fenton process for treatment of biological contaminants, application of different effective cells in the electro-Fenton process, hybridization of the electro-Fenton with other wastewater treatments technologies and full-scale analysis of economic costs are key recommendations which deserve considerable scholarly attention. Finally, it concludes that by implementing all the abovementioned gaps, the commercialization of electro-Fenton technology would be a realistic goal.

In situ transformation of hierarchical FeOOH/CuO arrays with electro-cleaning capability for oil-in-water emulsion separation and electro-fenton degradation of organic dye

With the increasing oily wastewater discharges and crude oil leakage accidents, the eco-environment and human health is seriously harmed. Membrane technology is an ideal choice for industrial oil/water separation, but the gradually structural fouling has severely hampered the long-term practical applications. Herein, membrane separation, electroflotation and electro-Fenton technologies are successfully coupled through structural design and regulation. The FeOOH nanosheet/CuO nanowire coated on copper mesh is prepared via chemical oxidation and thermal dehydration. The FeOOH nanosheets are in situ converted and tightly encapsulated on the surface of CuO nanowires, while the hierarchical nano-array structure and interconnected FeOOH coating ensure the superhydrophilic, underwater superoleophobic and electroflotation self-cleaning capabilities. Therefore, the 3*Fe/CuO-5 membrane exhibits high water flux (≥1400 L h−1 m−2), separation efficiency (≥99.2%) and excellent electroflotation self-cleaning capability (within 2 min) in oil-in-water emulsion separation. Moreover, the heterogeneous electro-Fenton system composed of 3*Fe/CuO-5 membrane exhibits good degradation efficiency of 30 mg L−1 methylene blue within 100 min. Thus, the as-prepared 3*Fe/CuO-5 membrane is promising in industrial wastewater purification due to its rapid oil separation and soluble organic purification ability.

Hemin derived iron and nitrogen-doped carbon as a novel heterogeneous electro-Fenton catalyst to efficiently degrade ciprofloxacin

• Hemin derived iron and nitrogen-doped carbon catalyst exhibited high ciprofloxacin degradation and mineralization efficiency. • KHCO 3 -MgO dual-porogen improved the porous characteristics and exposed the iron sites. • Based on degradation intermediates analysis, a possible degradation pathway of CIP was proposed. • It exhibited good stability and potential for treatment of organic pollutants in wastewater. Heterogeneous electro-Fenton (HEF) technology has become a hot topic for degradation of organic pollutants in water. However, it remains a challenge to design effective catalysts for high H 2 O 2 utilization and pollutant degradation. In this work, we explored a novel iron and nitrogen-doped carbon catalyst derived from hemin (Fe-N-C) using KHCO 3 -MgO as dual-porogen. The results suggested that the KHCO 3 -MgO dual-porogen could not only improve the porous characteristics of catalyst, but also expose iron sites and change the proportion of nitrogen species. The pollutant degradation results demonstrated that the Fe-N-C-700/HEF system exhibited high ciprofloxacin degradation efficiency of 93.82% within 50 min and mineralization efficiency of 87.87% within 90 min by low energy consumption. Moreover, cycle experiments and metal ions leaching experiments revealed that the catalyst had good stability and recyclability. Electron spin resonance (ESR) test and radical capturing experiment showed that • OH was the dominant active species in this HEF system. In addition, the Fe-N-C-700/HEF system achieved satisfactory performance in the treatment of real water matrix, indicating the possibility for practical application in wastewater purification.