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Qi H, Shi X, Liu Z, Yan Z, Sun Z. An anode and cathode cooperative oxidation system constructed with Ee-GF as anode and CuFe 2O 4/Cu 2O/Cu@EGF as cathode for the efficient removal of sulfamethoxazole. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 875:162645. [PMID: 36889393 DOI: 10.1016/j.scitotenv.2023.162645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 02/20/2023] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
This study aimed to further improve the degradation efficiency of pollutants by electrochemical oxidation system and reduce the consumption of electric energy. A simple method of electrochemical exfoliation was used to modify graphite felt (GF) to prepare an anode material (Ee-GF) with high degradation performance. An anode and cathode cooperative oxidation system was constructed with Ee-GF as the anode and CuFe2O4/Cu2O/Cu@EGF as the cathode to efficiently degrade sulfamethoxazole (SMX). Complete degradation of SMX was achieved within 30 min. Compared with anodic oxidation system alone, the degradation time of SMX was reduced by half and the energy consumption was reduced by 66.8 %. The system displayed excellent performance for the degradation of different concentrations (10-50 mg L-1) of SMX, different pollutants, and under different water quality conditions. In addition, the system still maintained 91.7 % removal rate of SMX after ten consecutive runs. At least 12 degradation products and seven possible degradation routes of SMX were generated in the degradation process by the combined system. The eco-toxicity of degradation products of SMX was reduced after the proposed treatment. This study provided a theoretical basis for the safe, efficient, and low energy consumption removal of antibiotic wastewater.
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Affiliation(s)
- Haiqiang Qi
- Department of Environmental Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, PR China; National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China
| | - Xuelin Shi
- Department of Environmental Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, PR China; National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China
| | - Zhibin Liu
- Department of Environmental Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, PR China; National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China
| | - Zihao Yan
- Department of Environmental Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, PR China; National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China
| | - Zhirong Sun
- Department of Environmental Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, PR China; National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, PR China.
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Yang J, Zhao YG, Liu X, Fu Y. Anode modification of sediment microbial fuel cells (SMFC) towards bioremediating mariculture wastewater. MARINE POLLUTION BULLETIN 2022; 182:114013. [PMID: 35939936 DOI: 10.1016/j.marpolbul.2022.114013] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/17/2022] [Accepted: 07/29/2022] [Indexed: 06/15/2023]
Abstract
Remediation of mariculture wastewater is of great practical importance. In this study, sediment microbial fuel cells (SMFCs) were adopted and carbon felt anodes were modified to enhance COD and ammonia removal in mariculture system. The results showed that the SMFC anode with 5 % (w/w) graphene oxide (GO) coating performed best in pollutants removal and electricity generation. The maximum power density approached 132 mW/m2, nearly 4.5 times higher than the unmodified anode. The removal efficiency of COD and ammonia reached 82.1 % and 95.8 % respectively, both improved compared with the control and chemical modification. The modified anode effectively enriched the electrogenic Sulfurovum and Lactobacillus and thus led to a significant improvement in the electrochemical performance of SMFC. This study demonstrates the successful application of SMFCs with GO modified anodes in the in-situ removing pollutants and SMFCs present obvious remediation potential on the contaminated mariculture inhabitant.
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Affiliation(s)
- Jingyue Yang
- Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yang-Guo Zhao
- Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Lab of Marine Environmental Science and Ecology (Ocean University of China), Ministry of Education, Qingdao 266100, China.
| | - Xinpei Liu
- Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Yubin Fu
- College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
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Su Y, Chen N, Ren HL, Guo LL, Li Z, Wang XM. Preparation and Properties of Indium Ion Modified Graphite Felt Composite Electrode. Front Chem 2022; 10:899287. [PMID: 35572110 PMCID: PMC9091195 DOI: 10.3389/fchem.2022.899287] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 03/28/2022] [Indexed: 11/13/2022] Open
Abstract
Iron-chromium redox flow batteries (ICRFBs) have the advantages of high safety, long cycle life, flexible design, and low maintenance costs. Polyacrylonitrile-based graphite felt composite material has good temperature resistance, corrosion resistance, large surface area and excellent electrical conductivity, and is often used as the electrode material of ICRFB, but its chemical activity is poor. In order to improve the activity of the graphite felt electrode, In3+ was used for modification in this paper, and the modified graphite felt was used as the electrode material for iron-chromium batteries. The structure and surface morphology of the modified graphite felt were analyzed by the specific surface area analyzer and scanning electron microscope; the electrochemical impedance spectroscopy and cyclic voltammetry experiments were carried out on the electrochemical workstation to study the electro catalytic activity of In3+ modified graphite felt and its performance in ICRFBS. The results show that the graphite felt electrode modified with a concentration of 0.2 M In3+ was activated at 400°C for 2 h, and its surface showed a lot of grooves, and the specific surface area reached 3.889 m2/g, while the specific surface area of the untreated graphite felt was only 0.995 m2/g significantly improved. Electrochemical tests show that the electrochemical properties of graphite felt electrodes are improved after In3+ modification. Therefore, the In3+ modified graphite felt electrode can improve the performance of ICRFB battery, and also make it possible to realize the engineering application of ICRFB battery.
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Affiliation(s)
- Yang Su
- Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, School of Materials Science and Engineering, Yingkou Institute of Technology, Yingkou, China
- School of Materials Science and Metallurgy, University of Science and Technology Liaoning, Anshan, China
| | - Na Chen
- Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, School of Materials Science and Engineering, Yingkou Institute of Technology, Yingkou, China
| | - Hai-lin Ren
- Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, School of Materials Science and Engineering, Yingkou Institute of Technology, Yingkou, China
| | - Li-li Guo
- Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, School of Materials Science and Engineering, Yingkou Institute of Technology, Yingkou, China
| | - Zhen Li
- Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, School of Materials Science and Engineering, Yingkou Institute of Technology, Yingkou, China
| | - Xiao-min Wang
- Liaoning Key Laboratory of Chemical Additive Synthesis and Separation, School of Materials Science and Engineering, Yingkou Institute of Technology, Yingkou, China
- *Correspondence: Xiao-min Wang,
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Ramadas A, Dinesh A, Sengupta S, Kundu M, Venkatesh K, Muralidhara HB. Carbon spheres decorated-graphene oxide framework as an excellent active material for redox flow battery and supercapacitors. ENVIRONMENTAL TECHNOLOGY 2022:1-12. [PMID: 35184702 DOI: 10.1080/09593330.2022.2044920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
Composite of dextrose-derived oxygen-rich carbon spheres and graphene oxide, synthesised using a cost-effective and easy hydrothermal process, was used as an active material in two of the trending and promising energy storage devices. The surface morphology and properties of the composite were studied using scanning electron microscope, X-ray diffractometer, energy dispersive X-ray analysis, elemental mapping and Raman spectra. To analyse the electrochemical behaviour of the material, several electrochemical techniques such as cyclic voltammetry (CV), chronopotentiometry, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation study were used. The reversibility of Fe2+/Fe3+ redox species and resistance offered by electrolyte towards the modified electrode were studied using CV, EIS and Tafel studies. Further evaluation of efficacy of the active material towards the iron redox flow battery (IRFB) of 132 cm2 area was analysed by performing charge discharge studies at varied current densities. Substantial increase in the electrochemical performance of the IRFB with a coulombic efficiency (CE) 93% along with the good life cycle stability up to 25 cycles was observed. The composite was also used as a superior electrode material for supercapacitor application resulting in significant enhancement in the electrochemical performance with specific capacitance of 610 F g-1 and CE of 83% with 93% retention up to 1600 cycles.
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Affiliation(s)
- Aditya Ramadas
- Department of Mechanical Engineering, Jyothy Institute of Technology, Visvesvaraya Technological University, Jnana Sangama, Belagavi, India
| | - Anarghya Dinesh
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC), Jyothy Institute of Technology, Bangalore, India
| | - Shilpi Sengupta
- Electrochemial Energy Storage Laboratory, Department of Chemistry, SRM Institute of Science and Technology, Chennai, India
| | - Manab Kundu
- Electrochemial Energy Storage Laboratory, Department of Chemistry, SRM Institute of Science and Technology, Chennai, India
| | - Krishna Venkatesh
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC), Jyothy Institute of Technology, Bangalore, India
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