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Zhang F, Li T, Zhang Z, Qin X, Xu C. Enhanced in situ H 2O 2 electrosynthesis and leachate concentrate degradation through side-aeration and modified cathode in an electro-Fenton system. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 186:35-45. [PMID: 38852375 DOI: 10.1016/j.wasman.2024.05.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 05/09/2024] [Accepted: 05/29/2024] [Indexed: 06/11/2024]
Abstract
The active graphite felt (GF) catalytic layer was effectively synthesized through a wet ultrasonic impregnation-calcination method, modified with CB and PTFE, and implemented in a pioneering side-aeration electrochemical in-situ H2O2 reactor. The optimal mass ratio (CB: PTFE 1:4) for the modified cathode catalytic layer was determined using a single-factor method. Operating under optimum conditions of initial pH 5, 0.5 L/min air flow, and a current density of 9 mA/cm2, the system achieved a remarkable maximum H2O2 accumulation of 560 mg/L, with the H2O2 production capacity consistently exceeding 95 % over 6 usage cycles. The refined mesoporous structure and improved three-phase interface notably amplified oxygen transfer, utilization, and H2O2 yield. Side aeration led to an oxygen concentration near the cathode reaching 20 mg/L, representing a five-fold increase compared to the 3.95 mg/L achieved with conventional bottom aeration. In the final application, the reaction system exhibited efficacy in the degradation of landfill leachate concentrate. After a 60-minute reaction, complete removal of chroma was attained, and the TOC degradation rate surpassed 60 %, marking a sixfold improvement over the conventional system. These results underscore the substantial potential of the system in H2O2 synthesis and environmental remediation.
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Affiliation(s)
- Fanbin Zhang
- Faculty of Environment and Life, Beijing University of Technology, No.100 Pingleyuan, Chaoyang District, Beijing 100124, China.
| | - Tinghui Li
- Faculty of Environment and Life, Beijing University of Technology, No.100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Zilong Zhang
- Faculty of Environment and Life, Beijing University of Technology, No.100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Xia Qin
- Faculty of Environment and Life, Beijing University of Technology, No.100 Pingleyuan, Chaoyang District, Beijing 100124, China.
| | - Cuicui Xu
- Faculty of Environment and Life, Beijing University of Technology, No.100 Pingleyuan, Chaoyang District, Beijing 100124, China
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Wang X, Wang X, Lynch I, Ma J. High-efficiency removal of tetracycline from water by electrolysis-assisted NZVI: mechanism of electron transfer and redox of iron. RSC Adv 2023; 13:15881-15891. [PMID: 37250228 PMCID: PMC10213827 DOI: 10.1039/d3ra00954h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 04/11/2023] [Indexed: 05/31/2023] Open
Abstract
A low-cost, stable and non-precious metal catalyst for efficient degradation of tetracycline (TC), one of the most widely used antibiotics, has been developed. We report the facile fabrication of an electrolysis-assisted nano zerovalent iron system (E-NZVI) that achieved TC removal efficiency of 97.3% with the initial concentration of 30 mg L-1 at an applied voltage of 4 V, which was 6.3 times higher than the NZVI system without an applied voltage. The improvement caused by electrolysis was mainly attributed to the stimulation of corrosion of NZVI, which accelerated the release of Fe2+. And Fe3+ in the E-NZVI system could receive electrons to reduce to Fe2+, which facilitated the conversion of ineffective ions to effective ions with reducing ability. Moreover, electrolysis assisted to expand the pH range of the E-NZVI system for TC removal. The uniformly dispersed NZVI in the electrolyte facilitated the collection and secondary contamination could be prevented with the easy recycling and regeneration of the spent catalyst. In addition, scavenger experiments revealed that the reducing ability of NZVI was accelerated in the presence of electrolysis, rather than oxidation. TEM-EDS mapping, XRD and XPS analyses indicated that electrolytic effects could also delay the passivation of NZVI after a long run. This is mainly due to the increased electromigration, implying that the corrosion products of iron (iron hydroxides and oxides) are not formed mainly near or on the surface of NZVI. The electrolysis-assisted NZVI shows excellent removal efficiency of TC and is a potential water treatment method for the degradation of antibiotic contaminants.
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Affiliation(s)
- Xiangyu Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology Kunming 650500 China
| | - Xiangmei Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology Kunming 650500 China
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham Birmingham B15 2TT UK
| | - Jun Ma
- School of Municipal and Environmental Engineering, Harbin Institute of Technology Harbin 150090 China
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Cruz Del Álamo A, Puga A, Pariente MI, Rosales E, Molina R, Pazos M, Martínez F, Sanromán MA. Activity and stability of bifunctional perovskite/carbon-based electrodes for the removal of antipyrine by electro-Fenton process. CHEMOSPHERE 2023; 334:138858. [PMID: 37178935 DOI: 10.1016/j.chemosphere.2023.138858] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 05/03/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023]
Abstract
Bifunctional perovskite/carbon-black(CB)/polytetrafluoroethylene(PTFE) electrodes for electro-generation and catalytic decomposition of hydrogen peroxide to oxidizing hydroxyl radicals have been fabricated. These electrodes were tested for electroFenton (EF) removal of antipyrine (ANT) as a model antipyretic and analgesic drug. The influence of the binder loading (20 and 40 wt % PTFE) and type of solvent (1,3-dipropanediol and water) was studied for the preparation of CB/PTFE electrodes. The electrode prepared with 20 wt % PTFE and water exhibited a low impedance and remarkable H2O2 electro-generation (about 1 g/L after 240 min, a production rate of ca. 6.5 mg/h·cm2). The incorporation of perovskite on CB/PTFE electrodes was also studied following two different methods: i) direct deposition on the CB/PTFE electrode surface and ii) addition in the own CB/PTFE/water paste used for the fabrication. Physicochemical and electrochemical characterization techniques were used for the electrode's characterization. The dispersion of perovskite particles in the own electrode matrix (method ii) exhibited a higher EF performance than the immobilisation onto the electrode surface (method i). EF experiments at 40 mA/cm2 and pH 7 (non-acidified conditions) showed ANT and TOC removals of 30% and 17%, respectively. The increase of current intensity up to 120 mA/cm2 achieved the complete removal of ANT and 92% of TOC mineralisation in 240 min. The bifunctional electrode also proved high stability and durability after 15 h of operation.
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Affiliation(s)
- A Cruz Del Álamo
- Department of Chemical and Environmental Technology, ESCET, Rey Juan Carlos University, 28933, Móstoles, Madrid, Spain
| | - A Puga
- CINTECX, Universidad de Vigo, Grupo de Bioingeniería y Procesos Sostenibles, Departamento de Ingeniería Química, Campus Lagoas-Marcosende, Vigo, 36310, Spain
| | - M I Pariente
- Department of Chemical and Environmental Technology, ESCET, Rey Juan Carlos University, 28933, Móstoles, Madrid, Spain
| | - E Rosales
- CINTECX, Universidad de Vigo, Grupo de Bioingeniería y Procesos Sostenibles, Departamento de Ingeniería Química, Campus Lagoas-Marcosende, Vigo, 36310, Spain
| | - R Molina
- Department of Chemical and Environmental Technology, ESCET, Rey Juan Carlos University, 28933, Móstoles, Madrid, Spain
| | - M Pazos
- CINTECX, Universidad de Vigo, Grupo de Bioingeniería y Procesos Sostenibles, Departamento de Ingeniería Química, Campus Lagoas-Marcosende, Vigo, 36310, Spain
| | - F Martínez
- Department of Chemical and Environmental Technology, ESCET, Rey Juan Carlos University, 28933, Móstoles, Madrid, Spain.
| | - M A Sanromán
- CINTECX, Universidad de Vigo, Grupo de Bioingeniería y Procesos Sostenibles, Departamento de Ingeniería Química, Campus Lagoas-Marcosende, Vigo, 36310, Spain.
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Yang Q, Xia C, Chen S, Cao X, Hao J. Enhanced activation of H 2O 2 by bimetallic Cu 2SnS 3: A new insight for Cu (II)/Cu (I) redox cycle promotion. J Colloid Interface Sci 2023; 640:750-760. [PMID: 36898181 DOI: 10.1016/j.jcis.2023.02.159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023]
Abstract
HYPOTHESIS Despite that the development of Cu2SnS3 (CTS) catalyst has attracted increasing interests, few study has reported to investigate its heterogeneous catalytic degradation of organic pollutants in a Fenton-like process. Furthermore, the influence of Sn components towards Cu (II)/Cu (I) redox cycling in CTS catalytic systems remains a fascinating research. EXPERIMENTS In this work, a series of CTS catalysts with controlled crystalline phases were prepared via a microwave-assisted pathway and applied in the H2O2 activation for phenol degradation. The efficiency of phenol degradation in CTS-1/H2O2 system (CTS-1: the molar ratio of Sn (copper acetate) and Cu (tin dichloride) is determined to be Sn:Cu = 1:1) was systematically investigated by controlling various reaction parameters including H2O2 dosage, initial pH and reaction temperature. We discovered that Cu2SnS3 exhibited superior catalytic activity to the contrast monometallic Cu or Sn sulfides and Cu (I) acted as the dominant active sites. The higher Cu (I) proportions conduce to the higher catalytic activities of CTS catalysts. Quenching experiments and electron paramagnetic resonance (EPR) further proved that the activation of H2O2 by CTS catalyst produces reactive oxygen species (ROS) and subsequently leads to degradation of the contaminants. A reasonable mechanism of enhanced H2O2 activation in Fenton-like reaction of CTS/H2O2 system was proposed for phenol degradation by investigating the roles of copper, tin and sulfur species. FINDINGS The developed CTS acted as a promising catalyst in Fenton-like oxidation progress for phenol degradation. Importantly, the copper and tin species contribute to a synergetic effect for the promotion of Cu (II)/Cu (I) redox cycle, which thus enhanced the activation of H2O2. Our work may offer new insight on the facilitation of Cu (II)/Cu (I) redox cycle in Cu-based Fenton-like catalytic systems.
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Affiliation(s)
- Qiao Yang
- Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan 250100, China
| | - Chuanhai Xia
- School of Resources and Environmental Engineering & Institute for Advanced Study of Coastal Ecology, Ludong University, Yantai 264025, China.
| | - Shuai Chen
- School of Resources and Environmental Engineering & Institute for Advanced Study of Coastal Ecology, Ludong University, Yantai 264025, China
| | - Xuezhi Cao
- School of Resources and Environmental Engineering & Institute for Advanced Study of Coastal Ecology, Ludong University, Yantai 264025, China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan 250100, China.
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Wang K, Li H, Yang Y, Wang P, Zheng Y, Song L. Making cathode composites more efficient for electro-fenton and bio-electro-fenton systems: A review. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122302] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Chi C, Zhou X, Wang Y, Zhang H, Meng G, Hu Y, Bai Z. Preparation of needle coke composite cathode and its treatment of RhB wastewater. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Xie F, Zhu W, Lin P, Zhang J, Hao Z, Zhang J, Huang T. A bimetallic (Co/Fe) modified nickel foam (NF) anode as the peroxymonosulfate (PMS) activator: Characteristics and mechanism. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Muzenda C, Nkwachukwu OV, Arotiba OA. Synthetic Ilmenite (FeTiO 3) Nanoparticles as a Heterogeneous Electro-Fenton Catalyst for the Degradation of Tetracycline in Wastewater. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Charles Muzenda
- Department of Chemical Sciences, University of Johannesburg, Johannesburg 2028, South Africa
| | - Oluchi V. Nkwachukwu
- Department of Chemical Sciences, University of Johannesburg, Johannesburg 2028, South Africa
| | - Omotayo A. Arotiba
- Department of Chemical Sciences, University of Johannesburg, Johannesburg 2028, South Africa
- Centre for Nanomaterials Science Research, University of Johannesburg, Johannesburg 2028, South Africa
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Ozturk D. Fe 3O 4/Mn 3O 4/ZnO-rGO hybrid quaternary nano-catalyst for effective treatment of tannery wastewater with the heterogeneous electro-Fenton process: Process optimization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 828:154473. [PMID: 35278567 DOI: 10.1016/j.scitotenv.2022.154473] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 02/21/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
This study investigated chemical oxygen demand (COD) removal from tannery wastewater (TWW) with a novel Fe3O4/Mn3O4/ZnO-rGO heterogeneous electro Fenton (HEF) hybrid magnetically-separable nano-catalyst. The graphite cathode and Ti/IrO2/RuO2 anode were used in the HEF process. With aeration (2 L/min), in-situ H2O2 generation occurred. The nano-catalyst was characterized by XRD, XPS, DLS, FT-IR, ζ potential, SEM, TEM, and BET techniques in detail. The system was modelled with a central composite design and optimized numerically. The established model was adequate, valid, reliable, and reproducible to predict the COD removal efficiency. OH and O2- were the oxidative species responsible for organic matter degradation. The effect of different processes was investigated, and efficiency was ranked from high to low as; HEF > anodic oxidation-H2O2 > anodic oxidation > adsorption. Under the optimum conditions; pH: 3.5, current density: 7.37 mA/cm2, reaction time: 79.43 min, and catalyst dose: 0.06 g/L, COD removal efficiency reached a maximum of 97.08%. The energy consumption and cost to remove 1 kg COD were 10.87 kWh and $1.41. The degradation of COD fitted the pseudo-first-order model. The nano-catalyst was stable and reusable with a minimum yield of 78.12% after 5 cycles.
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Affiliation(s)
- Dilara Ozturk
- Department of Environmental Engineering, Faculty of Engineering, Van Yuzuncu Yil University, Van, Turkey.
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Zhou J, Pan F, Wang T, Zhang Y, Yao Q, Zhu C, Zhu Y, Ma H, Niu J. Controlled Synthesis of Water–Soluble Pt Nanoclusters and Their Co–Catalysis with RuO2–IrO2 for Electrochemical Degradation of Tetracycline. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Electrochemical catalytic mechanism of N-doped electrode for in-situ generation of OH in metal-free EAOPs to degrade organic pollutants. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119432] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Tao L, Ren H, Yu F. High-efficiency electro-catalytic performance of green dill biochar cathode and its application in electro-Fenton process for the degradation of pollutants. NEW J CHEM 2021. [DOI: 10.1039/d1nj03430h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biochar (BC) is a kind of carbon-rich, renewable and low-cost material, which can be prepared from various organic materials.
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Affiliation(s)
- Ling Tao
- Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, P. R. China
- Gansu Hanxing Environmental Protection Co., Ltd., Lanzhou 730070, China
| | - Hanru Ren
- Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Fangke Yu
- School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, China
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