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Zhang C, Li H, Yang X, Tan X, Wan C, Liu X. Characterization of electrodes modified with sludge-derived biochar and its performance of electrocatalytic oxidation of azo dyes. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 324:116445. [PMID: 36352724 DOI: 10.1016/j.jenvman.2022.116445] [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: 07/18/2022] [Revised: 09/27/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
Pyrolysis of waste sludge in sewage treatment can achieve a substantial reduction in solid waste and obtain sludge-based biochars with multiple functions. However, the electrochemical properties of sludge-derived biochar as electrode modification material and the electrocatalytic ability of biochar-modified electrodes are still unclear. In this study, sludge-based biochars were prepared at various pyrolysis temperatures (400 °C, 500 °C, 600 °C, 700 °C, and 800 °C) and then were cast on glassy carbon electrodes to fabricate composite biochar-electrodes (GC400, GC500, GC600, GC700, and GC800). The results of elemental analysis and Raman spectra showed that sludge-based biochar prepared at higher temperatures exhibited higher aromaticity and degree of defect structures. And the results of cyclic voltammetry and electrochemical impedance spectra confirmed that biochar-modified electrodes prepared at higher temperatures (>600 °C) possessed better electrocatalytic activity and electrochemical stability, and their higher oxygen evolution potential than control test could improve the electrocatalytic efficiency. In the electrocatalytic oxidation of methyl orange, the removal rate with GC800 was the highest, reaching 94.49% within 240 min, and the removal rates with other composite electrodes were 90.61% (GC700) > 86.96% (GC600) > 80.32% (GC). The free radical quenching experiment revealed that the electrocatalytic degradation of methyl orange mainly depended on the indirect oxidation of hydroxyl radicals generated by electrocatalysis, accounting for 81.3% of the removal rate. The biochar-modified electrode not only greatly improved the electrocatalytic ability of the electrode for the degradation of azo dyes, but also achieved the recycling application of products after pyrolysis of sludge waste.
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Affiliation(s)
- Chen Zhang
- Shanghai Municipal Engineering Design Institute Group Co Ltd, Shanghai, 200092, China
| | - Huiqi Li
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200438, China
| | - Xue Yang
- Shanghai Municipal Engineering Design Institute Group Co Ltd, Shanghai, 200092, China.
| | - Xuejun Tan
- Shanghai Municipal Engineering Design Institute Group Co Ltd, Shanghai, 200092, China
| | - Chunli Wan
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200438, China
| | - Xiang Liu
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200438, China.
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Electro-Chemical Degradation of Norfloxacin Using a PbO2-NF Anode Prepared by the Electrodeposition of PbO2 onto the Substrate of Nickel Foam. Catalysts 2022. [DOI: 10.3390/catal12111297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A novel three-dimensional network nickel foam/PbO2 combination electrode (PbO2-NF) with high electrochemical degradation efficiency to norfloxacin was successfully fabricated through the electrodeposition of PbO2 on the substrate of nickel foam. The characterization of an PbO2-NF electrode, including surface morphology, elemental components, electrochemical performance, and stability was performed. In electrochemical oxidation tests, the removal efficiency of norfloxacin (initial concentration for 50 mg/L) on PbO2-NF reached 88.64% within 60 min of electrolysis, whereas that of pure nickel foam was only 30%. In the presence of PbO2-NF, the optimum current density, solution pH, electrode spacing for norfloxacin degradation were 30 mA/cm2, 11, and 3 cm, respectively. The electric energy consumption for 80% norfloxacin was approximately 5 Wh/L. Therefore, these results provide a new anode to improve the removal of norfloxacin in the wastewater with high efficiency and low energy consumption.
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Lalabadi MA, Peyman H, Roshanfekr H, Azizi S, Maaza M. Polyethersulfone nanofiltration membrane embedded by magnetically modified MOF (MOF@Fe3O4): fabrication, characterization and performance in dye removal from water using factorial design experiments. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03988-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Tian H, Jiao J, Yu X, Zha F, Tang X, Guo X, Chang Y. Synergic adsorption performance of activated carbon prepared from Chinese prickly ash seeds. ENVIRONMENTAL TECHNOLOGY 2022; 43:534-549. [PMID: 32674712 DOI: 10.1080/09593330.2020.1797892] [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: 10/21/2019] [Accepted: 06/11/2020] [Indexed: 06/11/2023]
Abstract
Waste residue of Chinese prickly ash seeds were simply treated with aqueous ZnCl2 to prepared the high-performed activated carbon. It was characterized by the methods of XRD, SEM, EDX, FT-IR, BET and XPS. The synergetic adsorption performance of Chinese prickly ash seeds activated carbon for Pb2+, Ni2+ and Acid Orange IΙ (AO) was studied. In the single-component system, the adsorption capacity of Pb2+, Ni2+ and AO were 15.1, 10.7 and 188.4 mg/g, respectively. In the AO-Pb2+ system, the maximum adsorption capacity of Pb2+ and AO were 79.40 and 332.68 mg/g under temperature of 30°C and pH of 5.0, respectively. For AO-Ni2+ system, it was 375.6 and 38.3 mg/g, respectively. The adsorption kinetics was satisfactorily fitted by the pseudo-second-order model. The synergic adsorption process can be smoothly described by the non-modified Sips isotherm.
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Affiliation(s)
- Haifeng Tian
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, People's Republic of China
| | - Jiapeng Jiao
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, People's Republic of China
| | - Xia Yu
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, People's Republic of China
| | - Fei Zha
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, People's Republic of China
| | - Xiaohua Tang
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, People's Republic of China
| | - Xiaojun Guo
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, People's Republic of China
| | - Yue Chang
- College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, People's Republic of China
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Lanzhou, People's Republic of China
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Tong J, Zhu Z, Yang Y, Jiang Y. Removal of chemical oxygen demand from ethylenediaminetetraacetic acid cleaning wastewater with electrochemical treatment. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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The Application of Fluorescence Spectroscopy for the Investigation of Dye Degradation by Chemical Oxidation. J Fluoresc 2020; 30:1271-1279. [PMID: 32767189 DOI: 10.1007/s10895-020-02591-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 07/27/2020] [Indexed: 02/02/2023]
Abstract
Chemical oxidation is a key technique used in dye wastewater treatment via the formation of hydroxyl radicals. To obtain optimal treatment effects, it is critical to understand the interaction of the molecular structure of the dye with the hydroxyl radical. We evaluated fluorescence excitation-emission matrix spectroscopy to study the decay of an azo-dye (Procion Red MX-5B) by a hydroxyl radical generated from catalytic Fe (III) on H2O2. Results showed that fluorescence signal reliably indicated the variations of the chemical groups and components during degradation, and the degradation could be divided into three stages: initial degradation (decolorisation), rapid intermediate degradation, and final degradation. Under control of uncorrected matrix correlation, the fluorescence fractions could be fitted successfully by parallel factor model (PARAFAC) model: two fluorescence components in initial degradation including mono substituted benzene and mono substituted naphthalene, three components as multi substituted benzene in rapid degradation, and no components could be resolved in the final degradation. The results from the study demonstrate the utility fluorescence characterization of dye degradation mechanisms and enhance the understanding of the degradation mechanisms.
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Xia Y, Wang G, Guo L, Dai Q, Ma X. Electrochemical oxidation of Acid Orange 7 azo dye using a PbO 2 electrode: Parameter optimization, reaction mechanism and toxicity evaluation. CHEMOSPHERE 2020; 241:125010. [PMID: 31605993 DOI: 10.1016/j.chemosphere.2019.125010] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 09/15/2019] [Accepted: 09/28/2019] [Indexed: 06/10/2023]
Abstract
In this study, electrochemical oxidation of Acid Orange 7 (AO 7) azo dye has been investigated using a Fe-doped PbO2 electrode. The degradation of AO 7 followed pseudo-first-order reaction kinetics. The removals of AO 7, chemical oxygen demand (COD) and total organic carbon (TOC) were 87.15%, 49.88% and 44.94% after 60 min of electrolysis at the optimal conditions (Na2SO4 concentration 0.1 M, initial pH 5, initial AO 7 concentration 100 mg L-1 and applied current density 20 mA cm-2), respectively. And the corresponding degradation rate constant was 0.035 min-1. The intermediates formed during electrochemical process were identified, and a possible degradation pathway was proposed, which was initiated by the oxidation of azo bond (-NN-), hydroxylation and substitution reaction of -NH2 and -SO3H under the attack of OH, and ended with the formation of mineralization products such as NH4+, NO3-, SO42-, CO2 and H2O. The toxicity of treated AO 7 solution towards Vibrio fischeri increased slightly at first and then rapidly reduced to non-toxicity with prolonging time. The results indicate that electrochemical oxidation of AO 7 using Fe-doped PbO2 electrode is a promising way.
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Affiliation(s)
- Yijing Xia
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China.
| | - Guoqin Wang
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Lidong Guo
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Qizhou Dai
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Xiangjuan Ma
- College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China
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Improved decolorization of dye wastewater in an electrochemical system powered by microbial fuel cells and intensified by micro-electrolysis. Bioelectrochemistry 2018; 124:112-118. [DOI: 10.1016/j.bioelechem.2018.07.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 07/06/2018] [Accepted: 07/09/2018] [Indexed: 11/24/2022]
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Deciphering synergistic characteristics of redox mediators-stimulated echinenone production of Gordonia terrae TWIH01. J Biosci Bioeng 2018; 126:322-329. [DOI: 10.1016/j.jbiosc.2018.03.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 03/15/2018] [Accepted: 03/26/2018] [Indexed: 11/22/2022]
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Hu C, Hu B, Wang Y, Zhang Q, Zhou X. TiO2 nanotube arrays based DSA electrode and application in treating dye wastewater. RUSS J ELECTROCHEM+ 2016. [DOI: 10.1134/s1023193516050062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Martínez-Huitle CA, Rodrigo MA, Sirés I, Scialdone O. Single and Coupled Electrochemical Processes and Reactors for the Abatement of Organic Water Pollutants: A Critical Review. Chem Rev 2015; 115:13362-407. [PMID: 26654466 DOI: 10.1021/acs.chemrev.5b00361] [Citation(s) in RCA: 772] [Impact Index Per Article: 85.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Traditional physicochemical and biological techniques, as well as advanced oxidation processes (AOPs), are often inadequate, ineffective, or expensive for industrial water reclamation. Within this context, the electrochemical technologies have found a niche where they can become dominant in the near future, especially for the abatement of biorefractory substances. In this critical review, some of the most promising electrochemical tools for the treatment of wastewater contaminated by organic pollutants are discussed in detail with the following goals: (1) to present the fundamental aspects of the selected processes; (2) to discuss the effect of both the main operating parameters and the reactor design on their performance; (3) to critically evaluate their advantages and disadvantages; and (4) to forecast the prospect of their utilization on an applicable scale by identifying the key points to be further investigated. The review is focused on the direct electrochemical oxidation, the indirect electrochemical oxidation mediated by electrogenerated active chlorine, and the coupling between anodic and cathodic processes. The last part of the review is devoted to the critical assessment of the reactors that can be used to put these technologies into practice.
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Affiliation(s)
- Carlos A Martínez-Huitle
- Instituto de Química, Campus Universitário, Universidade Federal do Rio Grande do Norte , Av. Salgado Filho 3000 Campus Universitário Lagoa-Nova CEP 59078-970 Natal, RN, Brazil
| | - Manuel A Rodrigo
- Department of Chemical Engineering, Faculty of Chemical Sciences & Technologies, Ciudad Real, Universidad de Castilla-La Mancha , Ciudad Real 13071, Spain
| | - Ignasi Sirés
- Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona , Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Onofrio Scialdone
- Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica, Università degli Studi di Palermo , Palermo 90128, Italy
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Aït-Aissa A, Aïder M. Maple juice electro-activation in a three-compartmental reactor: Impact on the product pH and Redox potential. FOOD BIOSCI 2015. [DOI: 10.1016/j.fbio.2014.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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