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Acosta-Santoyo G, León-Fernández LF, Bustos E, Cañizares P, Rodrigo MA, Llanos J. Valorization of high-salinity effluents for CO 2 fixation and hypochlorite generation. CHEMOSPHERE 2021; 285:131359. [PMID: 34246099 DOI: 10.1016/j.chemosphere.2021.131359] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 06/16/2021] [Accepted: 06/26/2021] [Indexed: 06/13/2023]
Abstract
In this work, it is evaluated the fixation of carbon dioxide using the alkali generated in the chloralkaline process, as a new way to face the treatment of highly saline wastewater, in which it is aimed not to separate the wastewater into concentrated and diluted streams but to recover value-added products (VAPs) while contributing to minimize the carbon fingerprint of other processes. The electrolytic process is combined with a reactive absorption and with a crystallization, demonstrating the formation of pure nahcolite, hypochlorite (or chlorine) and hydrogen from the waste. Carbon dioxide is captured with a current efficiency over 90% and the energy required is around 0.65 kWh kg-1, which is very promising from the view point of sustainability, considering that the system can be easily powered with green energies.
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Affiliation(s)
- Gustavo Acosta-Santoyo
- Chemical Engineering Department, Faculty of Chemical Sciences and Technology, University of Castilla-La Mancha, 13071, Ciudad Real, Spain; Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Sanfandila, Pedro Escobedo, Mexico
| | - Luis F León-Fernández
- Chemical Engineering Department, Faculty of Chemical Sciences and Technology, University of Castilla-La Mancha, 13071, Ciudad Real, Spain
| | - Erika Bustos
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Sanfandila, Pedro Escobedo, Mexico
| | - Pablo Cañizares
- Chemical Engineering Department, Faculty of Chemical Sciences and Technology, University of Castilla-La Mancha, 13071, Ciudad Real, Spain
| | - M A Rodrigo
- Chemical Engineering Department, Faculty of Chemical Sciences and Technology, University of Castilla-La Mancha, 13071, Ciudad Real, Spain
| | - Javier Llanos
- Chemical Engineering Department, Faculty of Chemical Sciences and Technology, University of Castilla-La Mancha, 13071, Ciudad Real, Spain.
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2
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Singh H, Kumar N, Mishra BK. Understanding the by-product formation potential during phenol oxidation from in-situ electro-generated radicals by microalgae harvesting. ENVIRONMENTAL TECHNOLOGY 2021; 42:3533-3545. [PMID: 32085687 DOI: 10.1080/09593330.2020.1733675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/17/2020] [Indexed: 06/10/2023]
Abstract
Advanced oxidation processes have gained colossal attention owing to the prospect of accessible mineralization, but by-product formation and its toxicity evaluation are still inconclusive. The present study demonstrated the performance of electrochemical oxidation process supported with graphite electrodes for the oxidation of phenol from modulated coke oven wastewater. The results suggested that the hydrogen peroxide along with the in-situ synthesized oxidizing agents has the ability to increase the phenol mineralization 1.5 times and by-product toxicity potential on microalgae, Scenedesmus sp. CBIIT(ISM) also revealed that chlorophyll-a synthesis has increased after the electro-oxidation process in coke oven wastewater. The experimental results for phenol mineralization and by-product formation were validated using a mass spectrophotometer.
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Affiliation(s)
- Hariraj Singh
- Department of Environmental Science & Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad, India
| | - Niwas Kumar
- Department of Environmental Science & Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad, India
| | - Brijesh Kumar Mishra
- Department of Environmental Science & Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad, India
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3
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Bakaraki Turan N, Sari Erkan H, İlhan F, Onkal Engin G. Highlighting the cathodic contribution of an electrooxidation post-treatment study on decolorization of textile wastewater effluent pre-treated with a lab-scale moving bed-membrane bioreactor. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:25972-25983. [PMID: 33479878 DOI: 10.1007/s11356-021-12409-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 01/06/2021] [Indexed: 06/12/2023]
Abstract
This study is carried out to investigate the effect of the cathodic contribution in the performance of electro-oxidation process for decolorization of the textile wastewater effluent pre-treated with a lab-scale moving bed-membrane bioreactor. For this purpose, titanium dioxide (TiO2) was used as anode electrode and four different cathodic electrode materials: Graphite, TiO2, TiO2-coated Platine, and TiO2-coated ruthenium dioxide (RuO2) (namely RuO2) were tested and compared for their color removal efficiencies. Besides, the optimization parameters that affect color removal in correspondence to the electrode materials, such as applied current, electrolysis time, and pH were studied. In this context, the optimum parameters for each electrode material were selected, and the color removal percentages were found as 92.95%, 91.58%, 91.40%, and 89.17% for TiO2/Graphite, TiO2/Platine, TiO2/TiO2, and TiO2/RuO2, respectively. Finally, the operational cost for each of the tested cathodic electrode materials was calculated in each of the studied optimization parameters making it easier and practical for the selection and evaluation of the electrode materials by the readers. The correlation coefficients (R2) were 81.2%, 87.1%, 86.7%, and 88.6% respectively as a result of the optimization study using the nonlinear regression modeling.
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Affiliation(s)
- Nouha Bakaraki Turan
- Civil Engineering Faculty, Environmental Engineering Department, Yildiz Technical University, 34220 Davutpasa, Esenler, Istanbul, Turkey
| | - Hanife Sari Erkan
- Civil Engineering Faculty, Environmental Engineering Department, Yildiz Technical University, 34220 Davutpasa, Esenler, Istanbul, Turkey.
| | - Fatih İlhan
- Civil Engineering Faculty, Environmental Engineering Department, Yildiz Technical University, 34220 Davutpasa, Esenler, Istanbul, Turkey
| | - Guleda Onkal Engin
- Civil Engineering Faculty, Environmental Engineering Department, Yildiz Technical University, 34220 Davutpasa, Esenler, Istanbul, Turkey
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Nidheesh PV, Kumar A, Syam Babu D, Scaria J, Suresh Kumar M. Treatment of mixed industrial wastewater by electrocoagulation and indirect electrochemical oxidation. CHEMOSPHERE 2020; 251:126437. [PMID: 32171129 DOI: 10.1016/j.chemosphere.2020.126437] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 03/05/2020] [Accepted: 03/06/2020] [Indexed: 06/10/2023]
Abstract
Treatment of mixed industrial wastewater is a challenging task due to its high complexity. This work scrutinizes the electrochemical treatment of mixed industrial wastewater, specifically electrocoagulation and indirect electrochemical oxidation processes through COD and color removal studies. Both processes are found to be more efficient at the wastewater pH. Monopolar connection was found more effective than bipolar connection for the removal of COD and color from wastewater. The monopolar connection removed COD up to 55% and color 56% whereas bipolar connection leads to the removal of 43% and 48% respectively at wastewater pH with an applied voltage 1.5 V in the course of 1 h of electrolysis. In the case of indirect electrochemical oxidation process using graphite electrodes, the COD and color abatement efficiencies of the indirect electrochemical oxidation process were found as 55% and 99.8%, respectively within 1 h of electrolysis conducted at pH 7.7, applied voltage 4 V, and NaCl concentration 1 g L-1. This work also highlights the importance of the presence of electrolytes in the indirect electrochemical oxidation process as the external addition of sodium chloride significantly enhanced both COD and color elimination efficiency.
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Affiliation(s)
- P V Nidheesh
- CSIR- National Environmental Engineering Research Institute, Nagpur, Maharashtra, India.
| | - Abhijeet Kumar
- CSIR- National Environmental Engineering Research Institute, Nagpur, Maharashtra, India; Central University of Jharkhand, Ranchi, Jharkhand, India
| | - D Syam Babu
- CSIR- National Environmental Engineering Research Institute, Nagpur, Maharashtra, India
| | - Jaimy Scaria
- CSIR- National Environmental Engineering Research Institute, Nagpur, Maharashtra, India
| | - M Suresh Kumar
- CSIR- National Environmental Engineering Research Institute, Nagpur, Maharashtra, India
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Gao S, Su J, Wei X, Wang M, Tian M, Jiang T, Wang ZL. Self-Powered Electrochemical Oxidation of 4-Aminoazobenzene Driven by a Triboelectric Nanogenerator. ACS NANO 2017; 11:770-778. [PMID: 28061028 DOI: 10.1021/acsnano.6b07183] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A rotary disc-structured triboelectric nanogenerator (rd-TENG) on the basis of free-standing electrification has been designed, where the aluminum composite panel has not been tailored to the stator becauseit is commercially available and cost-effective, has good electronic conductivity, and is easily processed. With the rotating speed increasing from 200 to 1000 rpm, the short-circuit current (Isc) is sharply enhanced from 50 μA to 200 μA, while the measured open-circuit voltage (Voc) and transferred charge (Qtr) almost keep constant, 600 V and 0.4 μC, respectively. The matched load for the rd-TENG at a rotating speed of 600 rpm is 2.7 MΩ, generating a maximum power of 19.75 mW, which corresponds to a maximum power density of 2.28 W m-2. Using the electric power generated by such a rd-TENG, highly toxic and carcinogenic 4-aminoazobenzene can be selectively treated to produce CO2 or an oligomer via reasonably controlling electrochemical oxidation potentials. The underlying mechanism is tentatively proposed based on the cyclic voltammogram, gas chromatograph-mass spectrometer, electrochemical impedance spectroscopy, and UV-vis spectra. Here the electrochemical degradation in a single-compartment cell is more valid, preferable, and feasible. The output Voc and rectified current of rd-TENG guarantee its extensive application to self-power electrochemical degradation of other azo compounds, i.e., 2-(4-dimethylaminophenylazo) benzoic acid, to CO2. This work suggests that rd-TENG, sustainable energy, can be feasibly designed to self-power a practical electrochemical treatment of dyeing wastewater by harvesting vibration energy.
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Affiliation(s)
- Shuyan Gao
- School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P.R. China
| | - Jingzhen Su
- School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P.R. China
| | - Xianjun Wei
- School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P.R. China
| | - Miao Wang
- School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P.R. China
| | - Miao Tian
- School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P.R. China
| | - Tao Jiang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences , Beijing 100083, P. R. China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences , Beijing 100083, P. R. China
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332-0245, United States
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Gong Y, Zhang MM, Qin JB, Li J, Meng JP, Lin JH. Metal(II) complexes synthesized based on quinoline-2,3-dicarboxylate as electrocatalysts for the degradation of methyl orange. Dalton Trans 2014; 43:8454-60. [PMID: 24741675 DOI: 10.1039/c3dt53505c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on quinoline-2,3-dicarboxylic acid (H2L), two metal(II) complexes formulated as MnL(phen)(H2O)·H2O (phen = 1,10-phenanthroline) (1) and Co(HL)2(PPA)·4H2O (PPA = N(1),N(4)-di(pyridin-4-yl)terephthalamide) (2) were synthesized and structurally characterized by single-crystal X-ray diffraction. Both complexes 1 and 2 exhibit one-dimensional (1D) chain-like structures, in which stable five-membered rings are observed. Different chains are linked by strong π-π stacking interactions into a three-dimensional (3D) supramolecular architecture. Both complexes can increase the degradation rate of methyl orange (MO), which is expected to be associated with their electrocatalytic activities for the H2 evolution reaction from water.
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Affiliation(s)
- Yun Gong
- Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P. R. China.
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Yang Y, Zhang H, Lee S, Kim D, Hwang W, Wang ZL. Hybrid energy cell for degradation of methyl orange by self-powered electrocatalytic oxidation. NANO LETTERS 2013; 13:803-8. [PMID: 23323926 DOI: 10.1021/nl3046188] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In general, methyl orange (MO) can be degraded by an electrocatalytic oxidation process driven by a power source due to the generation of superoxidative hydroxyl radical on the anode. Here, we report a hybrid energy cell that is used for a self-powered electrocatalytic process for the degradation of MO without using an external power source. The hybrid energy cell can simultaneously or individually harvest mechanical and thermal energies. The mechanical energy was harvested by the triboelectric nanogenerator (TENG) fabricated at the top by using a flexible polydimethysiloxane (PDMS) nanowire array with diameters of about 200 nm. A pyroelectric nanogenerator (PENG) was fabricated below the TENG to harvest thermal energy. The power output of the device can be directly used for electrodegradation of MO, demonstrating a self-powered electrocatalytic oxidation process.
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Affiliation(s)
- Ya Yang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, USA
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Liu Z, Wang F, Li Y, Xu T, Zhu S. Continuous electrochemical oxidation of methyl orange waste water using a three-dimensional electrode reactor. J Environ Sci (China) 2011; 23 Suppl:S70-S73. [PMID: 25084598 DOI: 10.1016/s1001-0742(11)61081-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The removal of methyl orange wastewater was experimentally investigated using a three-dimensional electrode reactor with granular activated carbon and titanium filter electrodes arrays. The effects of the electric current, the residence time and the initial dye concentration on the methyl orange removal were evaluated. For the initial concentration of 1150 mg/L, the COD removal was obtained as 90% under the conditions of electric current 2 A, residence time 40 min. The effluent path of the electrochemical cell was optimized, using the anode effluent instead of the top effluent, where the COD removal was increased to 93% and the corresponding energy consumption was decreased from 15.5 to 14.6 kW-hr/kg COD.
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Affiliation(s)
- Zhigang Liu
- School of Environmental & Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China
| | - Feifei Wang
- Department of Safety and Environmental Protection, Dalian Locomotive and Rolling Stock Co. Ltd. CNR Group, Dalian 116028, China
| | - Yansheng Li
- School of Environmental & Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China
| | - Tianlong Xu
- School of Environmental & Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China
| | - Shaomin Zhu
- School of Environmental & Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China
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Oke IA. Influence of carbonisation on selected engineering properties of carbon resin electrodes for electrochemical treatment of wastewater. CAN J CHEM ENG 2009. [DOI: 10.1002/cjce.20218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Isaiah Adesola Oke
- Department of Civil Engineering, Obafemi Awolowo University, Ile‐Ife, Nigeria
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Ma H, Wang B, Luo X. Studies on degradation of Methyl Orange wastewater by combined electrochemical process. JOURNAL OF HAZARDOUS MATERIALS 2007; 149:492-8. [PMID: 17493748 DOI: 10.1016/j.jhazmat.2007.04.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2006] [Revised: 02/01/2007] [Accepted: 04/06/2007] [Indexed: 05/15/2023]
Abstract
The combined process of electro-catalytic oxidation and de-colorization of wastewater contained Methyl Orange (MO) in a double-anode system, with iron plate and graphite plate as anodes and graphite plate as cathode assisted by Co2O3-CuO-PO4(3-) modified kaolin, was investigated systematically. The effects of pH, current density and electrolyte on de-colorization efficiency were also studied. Chemical oxygen demand (COD) was selected as another parameter to evaluate the efficiency of this combined degradation method on treatment of MO wastewater and the results revealed that when initial pH was 5.0, current density was 30 mA cm(-2), NaCl as electrolyte and its concentration was 2.5 g dm(-3), the color removal efficiency and COD removal can reach 100% and 89.7%, respectively. Meanwhile, the kinetics and the possible mechanism were also discussed.
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Affiliation(s)
- Hongzhu Ma
- Institute of Energy Chemistry, College of Chemistry and Materials Science, Shaanxi Normal University, Xi'An 710062, China
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Martínez-Huitle CA, Ferro S. Electrochemical oxidation of organic pollutants for the wastewater treatment: direct and indirect processes. Chem Soc Rev 2006; 35:1324-40. [PMID: 17225891 DOI: 10.1039/b517632h] [Citation(s) in RCA: 792] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In recent years, there has been increasing interest in finding innovative solutions for the efficient removal of contaminants from water, soil and air. The present tutorial review summarizes the results of an extensive selection of papers dealing with electrochemical oxidation, which is proposed as an alternative for treating polluted wastes. Both the direct and indirect approaches are considered, and the role of electrode materials is discussed together with that of other experimental parameters. Apart from discussing the possibility of removing selected contaminants from water using different anodes, efficiency rates for pollutant removal have been collected, the dependence of these rates on operational conditions advantages and disadvantages determining the further full-scale commercial application.
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