251
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Can OT, Tutun MM, Keyikoglu R. Anodic oxidation of bisphenol A by different dimensionally stable electrodes. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:1907-1919. [PMID: 33905361 DOI: 10.2166/wst.2021.092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Bisphenol A (BPA) is a known endocrine disrupter and was detected in surface waters. We investigated the mineralization of BPA by electrochemical oxidation. Six different types of electrodes, including the boron-doped diamond (BDD), platinum (Pt), and mixed metal oxide (MMO) electrodes; RuO2-IrO2, RuO2-TiO2, IrO2-Ta2O5, and Pt-IrO2, were compared as the anode material. Total organic carbon (TOC) was analyzed to monitor the mineralization efficiency of BPA. BDD achieved 100% BPA mineralization efficiency in 180 min and at a current density of 125 mA/cm2, whereas the TOC removal efficiency of Pt was 60.9% and the efficiency of MMO electrodes ranged between 48 and 54%. BDD exhibited much lower specific energy consumption, which corresponds to a lower energy cost (USD63.4 /kg TOC). The effect of operational parameters showed that the BDD anode was much more affected by the current density, initial BPA concentration, and electrolyte concentration than the other parameters such as the stirring speed and interelectrode distance.
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Affiliation(s)
- Orhan T Can
- Department of Environmental Engineering, Bursa Technical University, 16310 Bursa, Turkey E-mail: ;
| | - Muhammed M Tutun
- Department of Environmental Engineering, Bitlis Eren University, 13000 Bitlis, Turkey
| | - Ramazan Keyikoglu
- Department of Environmental Engineering, Bursa Technical University, 16310 Bursa, Turkey E-mail: ; ; Department of Environmental Engineering, Gebze Technical University, 41400 Gebze, Turkey
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252
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Zhu X, Hu W, Feng C, Chen N, Chen H, Kuang P, Deng Y, Ma L. Electrochemical oxidation of aniline using Ti/RuO 2-SnO 2 and Ti/RuO 2-IrO 2 as anode. CHEMOSPHERE 2021; 269:128734. [PMID: 33143899 DOI: 10.1016/j.chemosphere.2020.128734] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/19/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
Electrocatalytic properties of anode and the electrolyte composition are important parameters influence the degradation efficiency for aniline wastewater. Ti/RuO2-SnO2 and Ti/RuO2-IrO2 have been fabricated using thermal decomposition method and experiments in electrolyte containing 0.05 M Na2SO4, 0.05 M NaCl and 0.05 M Na2SO4+0.005 M FeSO4 at different current density were conducted to study the influence on aniline degradation. Linear sweep voltammetry (LSV) showed that Ti/RuO2-SnO2 had higher oxygen evolution potential and degrade aniline through electrochemical transformation and electrochemical combustion while Ti/RuO2-IrO2 degrade aniline mainly through electrochemical transformation. The study showed that Ti/RuO2-SnO2 had higher electrocatalytic activity towards the degradation of aniline than Ti/RuO2-IrO2 anode in 0.05 M Na2SO4 and in 0.05 M NaCl electrolyte. The maximum TOC removal efficiency for Ti/RuO2-SnO2 was 64.2% at 40 mA cm-2 in Na2SO4 electrolyte while the average MCE was 1.6% and the average ECTOC was 1.51 kWh (g TOC)-1. On the contrary, the maximum TOC removal efficiency for Ti/RuO2-IrO2 was 63.1% at 40 mA cm-2 in NaCl electrolyte while the average MCE was 1.6% and the average ECTOC was 1.95 kWh (g TOC)-1. The presence of Fe2+ in Na2SO4 electrolyte would decrease the TOC removal efficiency except at low current density (20 mA cm-2) for Ti/RuO2-SnO2. These results indicated that Ti/RuO2-SnO2 and Ti/RuO2-IrO2 anode were suitable in Na2SO4 and NaCl electrolyte, respectively, while the presence of Fe2+ would inhibit aniline degradation.
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Affiliation(s)
- Xu Zhu
- School of Water Resources and Environment, China University of Geosciences (Beijing), No.29 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Weiwu Hu
- School of Water Resources and Environment, China University of Geosciences (Beijing), No.29 Xueyuan Road, Haidian District, Beijing, 100083, China; The Journal Center, China University of Geosciences (Beijing), No.29 Xueyuan Road, Haidian District, Beijing, 100083, China.
| | - Chuanping Feng
- School of Water Resources and Environment, China University of Geosciences (Beijing), No.29 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Nan Chen
- School of Water Resources and Environment, China University of Geosciences (Beijing), No.29 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Hongyan Chen
- College of Science, Beijing Forestry University, No.35 Tsinghua East Road, Haidian District, Beijing, 100083, PR China
| | - Peijing Kuang
- School of Water Resources and Environment, China University of Geosciences (Beijing), No.29 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Yang Deng
- School of Water Resources and Environment, China University of Geosciences (Beijing), No.29 Xueyuan Road, Haidian District, Beijing, 100083, China
| | - Linlin Ma
- School of Water Resources and Environment, China University of Geosciences (Beijing), No.29 Xueyuan Road, Haidian District, Beijing, 100083, China
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253
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dos Santos AJ, Fajardo AS, Kronka MS, Garcia-Segura S, Lanza MR. Effect of electrochemically-driven technologies on the treatment of endocrine disruptors in synthetic and real urban wastewater. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138034] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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254
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Calzadilla W, Espinoza LC, Diaz-Cruz MS, Sunyer A, Aranda M, Peña-Farfal C, Salazar R. Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-products. CHEMOSPHERE 2021; 269:128753. [PMID: 33131737 DOI: 10.1016/j.chemosphere.2020.128753] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/06/2020] [Accepted: 10/23/2020] [Indexed: 06/11/2023]
Abstract
The anodic oxidation (AO) of 30 pharmaceuticals including antibiotics, hormones, antihistaminics, anti-inflammatories, antidepressants, antihypertensives, and antiulcer agents, in solutions containing different supporting electrolytes media (0.05 M Na2SO4, 0.05 M NaCl, and 0.05 M Na2SO4 + 0.05 M NaCl) at natural pH was studied. A boron-doped diamond (BDD) electrode and a stainless-steel electrode were used as anode and cathode, respectively, and three current densities of 6, 20, and 40 mA cm-2 were applied. The results showed high mineralization rates, above 85%, in all the tested electrolytic media. 25 intermediaries produced during the electrooxidation were identified, depending on the supporting electrolyte together with the formation of carboxylic acids, NO3-, SO42- and NH4+ ions. The formation of intermediates in chloride medium produced an increase in absorbance. Finally, a real secondary effluent spiked with the 30 pharmaceuticals was treated by AO applying 6 mA cm-2 at natural pH and without addition of supporting electrolyte, reaching c.a. 90% mineralization after 300 min, with an energy consumption of 18.95 kW h m-3 equivalent to 2.90 USD m-3. A degradation scheme for the mixture of emerging contaminants in both electrolytic media is proposed. Thus, the application of anodic oxidation generates a high concentration of hydroxyl radicals that favors the mineralization of the pharmaceuticals present in the spiked secondary effluent sample.
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Affiliation(s)
- Wendy Calzadilla
- Laboratory of Advanced Research on Foods and Drugs, Department of Food Science and Technology, Faculty of Pharmacy, University of Concepción, Concepción, Chile
| | - L Carolina Espinoza
- Laboratory of Environmental Electrochemistry (LEQMA), Department of Chemical of Materials, Faculty of Chemistry and Biology, University of Santiago de Chile (USACH), Casilla 40, Correo 33, Santiago, Chile
| | - M Silvia Diaz-Cruz
- Institute of Environmental Assessment and Water Research (IDAEA) Severo Ochoa Excellence Center, Spanish Council for Scientific Research (CSIC), Jordi Girona 18-26, E-08034, Barcelona, Spain
| | - Adrià Sunyer
- Institute of Environmental Assessment and Water Research (IDAEA) Severo Ochoa Excellence Center, Spanish Council for Scientific Research (CSIC), Jordi Girona 18-26, E-08034, Barcelona, Spain
| | - Mario Aranda
- Laboratory of Research on Foods and Drugs, Department of Pharmacy, Faculty of Chemistry and Pharmacy, Pontifical Catholic University of Chile, Chile
| | - Carlos Peña-Farfal
- Institute of Applied Chemical Sciences, Faculty of Engineering, UNIVERSIDAD AUTONOMA DE CHILE, Av Alemania 01090, 4810101, Temuco, Chile
| | - Ricardo Salazar
- Laboratory of Environmental Electrochemistry (LEQMA), Department of Chemical of Materials, Faculty of Chemistry and Biology, University of Santiago de Chile (USACH), Casilla 40, Correo 33, Santiago, Chile.
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255
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Ulucan-Altuntas K, El Hadki A, Ilhan F, Zrineh A, El Hadki H, Kabbaj OK, Dahchour A, Debik E. Electrocatalytic degradation of oxytetracycline using three-dimensional electrode and optimization via fuzzy logic modeling. SEP SCI TECHNOL 2021. [DOI: 10.1080/01496395.2021.1900867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Kubra Ulucan-Altuntas
- Department of Environmental Engineering, Yildiz Technical University, Istanbul, Turkey
| | - Ahmed El Hadki
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water, and Environment, (LS3MN2E-CERNE2D), Department of Chemistry, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Fatih Ilhan
- Department of Environmental Engineering, Yildiz Technical University, Istanbul, Turkey
| | - Abdallah Zrineh
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water, and Environment, (LS3MN2E-CERNE2D), Department of Chemistry, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Hamza El Hadki
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water, and Environment, (LS3MN2E-CERNE2D), Department of Chemistry, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Oum Keltoum Kabbaj
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water, and Environment, (LS3MN2E-CERNE2D), Department of Chemistry, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Abdelmalek Dahchour
- Department of Fundamental and Applied Sciences, Hassan II Agronomic and Veterinary Institute, Rabat, Morocco
| | - Eyup Debik
- Department of Environmental Engineering, Yildiz Technical University, Istanbul, Turkey
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256
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McQuillan RV, Stevens GW, Mumford KA. Assessment of the electro-Fenton pathway for the removal of naphthalene from contaminated waters in remote regions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 762:143155. [PMID: 33131837 DOI: 10.1016/j.scitotenv.2020.143155] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/13/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
This work investigates the effectiveness of the electro-Fenton reaction for the treatment of wastewaters contaminated with petroleum hydrocarbons. More specific attention was given to field deployment applications in remote regions, such as the sub-Antarctic, where there is a need for low-cost technologies that can aid in remediation efforts. Naphthalene, a high priority pollutant for removal within these regions, was chosen as a model contaminant and treated with inexpensive graphite electrodes to promote the electro-Fenton pathway. Results show that naphthalene can be fully removed from a near-saturated solution, 20 mg/L, in less than 3 h of treatment. The underlying removal mechanisms were identified, and a kinetic model is presented that can accurately predict treatment outcomes at varying operating conditions of applied electric currents, 0-5 mA, and iron(II) concentrations, 0-2.0 mM. Optimal operating conditions for the electro-Fenton pathway were found to be at an applied current of 5 mA and an iron(II) concentration of 0.06 mM; this resulted in a specific energy consumption of 5.6 kWhr/kg of naphthalene removed, low enough to be operated in remote regions via sustainable energy sources.
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Affiliation(s)
- Rebecca V McQuillan
- Department of Chemical Engineering, University of Melbourne, Parkville, VIC 3010, Australia
| | - Geoffrey W Stevens
- Department of Chemical Engineering, University of Melbourne, Parkville, VIC 3010, Australia
| | - Kathryn A Mumford
- Department of Chemical Engineering, University of Melbourne, Parkville, VIC 3010, Australia.
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257
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Lee T, Lee W, Kim S, Lee C, Cho K, Kim C, Yoon J. High chlorine evolution performance of electrochemically reduced TiO 2 nanotube array coated with a thin RuO 2 layer by the self-synthetic method. RSC Adv 2021; 11:12107-12116. [PMID: 35423728 PMCID: PMC8696594 DOI: 10.1039/d0ra09623g] [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: 11/12/2020] [Accepted: 02/15/2021] [Indexed: 11/21/2022] Open
Abstract
Recently, reduced TiO2 nanotube arrays via electrochemical self-doping (r-TiO2) are emerging as a good alternative to conventional dimensionally stable anodes (DSAs) due to their comparable performance and low-cost. However, compared with conventional DSAs, they suffer from poor stability, low current efficiency, and high energy consumption. Therefore, this study aims to advance the electrochemical performances in the chlorine evolution of r-TiO2 with a thin RuO2 layer coating on the nanotube structure (RuO2@r-TiO2). The RuO2 thin layer was successfully coated on the surface of r-TiO2. This was accomplished with a self-synthesized layer of ruthenium precursor originating from a spontaneous redox reaction between Ti3+ and metal ions on the r-TiO2 surface and thermal treatment. The thickness of the thin RuO2 layer was approximately 30 nm on the nanotube surface of RuO2@r-TiO2 without severe pore blocking. In chlorine production, RuO2@r-TiO2 exhibited higher current efficiency (∼81.0%) and lower energy consumption (∼3.0 W h g-1) than the r-TiO2 (current efficiency of ∼64.7% of and energy consumption of ∼5.2 W h g-1). In addition, the stability (ca. 22 h) was around 20-fold enhancement in RuO2@r-TiO2 compared with r-TiO2 (ca. 1.2 h). The results suggest a new route to provide a thin layer coating on r-TiO2 and to synthesize a high performance oxidant-generating anode.
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Affiliation(s)
- Teayoung Lee
- School of Chemical and Biological Engineering, Institute of Chemical Processes (ICP), Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Woonghee Lee
- Division of Environmental Science & Engineering, POSTECH 77 Chungam-ro, Nam-gu Pohang 37673 Republic of Korea
| | - Seongsoo Kim
- School of Chemical and Biological Engineering, Institute of Chemical Processes (ICP), Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Changha Lee
- School of Chemical and Biological Engineering, Institute of Chemical Processes (ICP), Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Kangwoo Cho
- Division of Environmental Science & Engineering, POSTECH 77 Chungam-ro, Nam-gu Pohang 37673 Republic of Korea
| | - Choonsoo Kim
- Department of Environmental Engineering, Institute of Energy/Environment Convergence Technologies, Kongju National University 1223-24, Cheonan-daero Cheonan-si 31080 Republic of Korea
| | - Jeyong Yoon
- School of Chemical and Biological Engineering, Institute of Chemical Processes (ICP), Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
- Korea Environment Institute 370 Sicheong-daero Sejong-si 30147 Republic of Korea
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258
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Sato Y, Zeng Q, Meng L, Chen G. Importance of Combined Electrochemical Process Sequence and Electrode Arrangements: A Lab-scale Trial of Real Reverse Osmosis Landfill Leachate Concentrate. WATER RESEARCH 2021; 192:116849. [PMID: 33517046 DOI: 10.1016/j.watres.2021.116849] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/15/2021] [Accepted: 01/16/2021] [Indexed: 06/12/2023]
Abstract
Reverse osmosis (RO) is a widely applied technique for wastewater effluent reuse and landfill leachate treatment. The latter generates a refractory RO leachate concentrate (ROLC), for which cost-effective treatment is required. This study focuses on a two-step electrochemical method consisting of aluminum-based electrocoagulation (EC), and simultaneous electrooxidation-electrocoagulation with a titanium-based lead dioxide (Ti/ß-PbO2) anode and aluminum cathode (EOEC) assembly. The sequence and electrode arrangements of the combined electrochemical process were investigated to determine the organic transformation, Ti/ß-PbO2 anode viability, and energy consumption. Series-based EC-EOEC decreased the total chemical oxygen demand (COD) from 8750 mg L-1 to 380 mg L-1, a 96% removal efficiency, in 3.5 hours at 141 A m-2. Under a low energy consumption of 28.7 kWh kgCOD-1, the ROLC biodegradability (BOD5/COD) significantly increased from 0.015 to 0.530, which was ascribed to aromatic removal (e.g., -C=C) and an increase in -COOH functional groups. Furthermore, the rapid removal of natural organic matter and increase in pH elevation from EC suppressed the dissolution of Pb from the Ti/ß-PbO2 anode during the subsequent EOEC, thereby leaving 0.061 mg L-1 in the ROLC after treatment. The treatment cost was 3.86 USD kgCOD-1, which was approximately 34% lower than that of previously reported electrochemical processes for ROLC treatment. These findings obtained with a real RO concentrate provide a foundation for scaling up this new electrochemical treatment approach.
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Affiliation(s)
- Yugo Sato
- Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Qian Zeng
- Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Hong Kong, China.
| | - Liao Meng
- Xiaping Municipal Solid Waste Landfill Plant, Shenzhen, Guangdong Province, China
| | - Guanghao Chen
- Department of Civil and Environmental Engineering, Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution (Hong Kong Branch) and Water Technology Center, The Hong Kong University of Science and Technology, Hong Kong, China; Fok Ying Tung Research Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
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259
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Simultaneous electrochemical decolorization of Acid Red 33, Reactive Orange 7, Acid Yellow 3 and Malachite Green dyes by electrophoretically prepared Ti/nanoZnO-MWCNTs anode: Experimental design. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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260
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Bagastyo AY, Hidayati AS, Herumurti W, Nurhayati E. Application of boron-doped diamond, Ti/IrO 2, and Ti/Pt anodes for the electrochemical oxidation of landfill leachate biologically pretreated by moving bed biofilm reactor. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:1357-1368. [PMID: 33767042 DOI: 10.2166/wst.2021.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Conventional biological treatments used in most Indonesian landfill sites are mostly ineffective in treating stabilized landfill leachates to meet the standard regulation. Thus, a combination of biological and electrochemical process is offered to successfully treat leachates containing a high concentration of organic and nitrogenous compounds. In this study, a moving bed biofilm reactor (MBBR) was applied prior to electrochemical oxidation by using boron-doped diamond (BDD), Ti/IrO2, and Ti/Pt anodes with applied current of 350, 400 and 450 mA. The objectives were to investigate the effect of anode type and the applied current on the removal of organics as well as total nitrogen from the MBBR-treated leachate with electrochemical oxidation. The optimum removal of chemical oxygen demand (COD) observed on the Ti/Pt anode was 78% by applying 400 mA, with an estimated energy of 56.7 Wh g L-1. In the case of Ti/IrO2 and BDD anodes, the optimum removal of COD was 76 and 85% with an energy consumption of 58.9 and 36.9 Wh g L-1, respectively, both achieved at 350 mA. Although all anodes showed less-satisfactory performances for total nitrogen reduction, around 46-95% removal of nitrogenous compounds was achieved by MBBR, with their partial conversion to nitrates.
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Affiliation(s)
- Arseto Yekti Bagastyo
- Department of Environmental Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, Indonesia 60111 E-mail:
| | - Arum Sofiana Hidayati
- Department of Environmental Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, Indonesia 60111 E-mail:
| | - Welly Herumurti
- Department of Environmental Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, Indonesia 60111 E-mail:
| | - Ervin Nurhayati
- Department of Environmental Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, Indonesia 60111 E-mail:
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261
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Tran MH, Nguyen HC, Le TS, Dang VAD, Cao TH, Le CK, Dang TD. Degradation of glyphosate herbicide by an electro-Fenton process using carbon felt cathode. ENVIRONMENTAL TECHNOLOGY 2021; 42:1155-1164. [PMID: 31469339 DOI: 10.1080/09593330.2019.1660411] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 08/20/2019] [Indexed: 06/10/2023]
Abstract
An electro-Fenton system, which consists of a Pt gauze anode and a commercial carbon felt cathode, is commonly employed to generate in situ hydrogen peroxide, hydroxyl radical and regenerate ferrous catalyst for glyphosate degradation (a widely used herbicide in Vietnam) in aqueous solution. The absorbance measurements used to determine the glyphosate concentration during the electrolysis proved that glyphosate was degraded by pseudo-first-order kinetic. The influence of pH, current density, catalyst concentration and initial content of the glyphosate on mineralisation efficiency were studied by monitoring the total organic carbon (TOC) and hydrogen peroxide concentration during electrolysis. The results show that the maximal removal percentage of glyphosate was 91.91% with applied current density of 10 mA cm-2, pH 3, 0.1 mM Fe2+, 0.05 M Na2SO4, and 0.1 mM glyphosate in 40 min. The degrading rate constant of glyphosate degradation was calculated to be kapp = 0.063 min-1. In this 91.91% removal, 81.65% of glyphosate was mineralised and the remainder consists of intermediates produced during the electro-Fenton process.
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Affiliation(s)
- Manh Hai Tran
- Institute of Environmental Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Hoai Chau Nguyen
- Institute of Environmental Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Thanh Son Le
- Institute of Environmental Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Viet Anh Dung Dang
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - The Ha Cao
- Center for Environmental Technology & Sustainable Development (CETASD), Hanoi University of Science (HUS) - Vietnam National University, Hanoi, Vietnam
| | - Cao Khai Le
- Graduate University of Science & Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Trung-Dung Dang
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
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262
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Spinel CuxCo1−xMn2O4 electrode for effectively cleaning organic wastewater via electrocatalytic oxidation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118024] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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263
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García-Ramírez P, Ramírez-Morales E, Solis Cortazar JC, Sirés I, Silva-Martínez S. Influence of ruthenium doping on UV- and visible-light photoelectrocatalytic color removal from dye solutions using a TiO 2 nanotube array photoanode. CHEMOSPHERE 2021; 267:128925. [PMID: 33213874 DOI: 10.1016/j.chemosphere.2020.128925] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/21/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
The photocatalytic activity of TiO2 anodes was enhanced by synthesizing Ru-doped Ti|TiO2 nanotube arrays. Such photoanodes were fabricated via Ti anodization followed by Ru impregnation and annealing. The X-ray diffractograms revealed that anatase was the main TiO2 phase, while rutile was slightly present in all samples. Scanning electron microscopy evidenced a uniform morphology in all samples, with nanotube diameter ranging from 60 to 120 nm. The bias potential for the photoelectrochemical (PEC) treatment was selected from the electrochemical characterization of each electrode, made via linear sweep voltammetry. All the Ru-doped TiO2 nanotube array photoanodes showed a peak photocurrent (PP) and a saturation photocurrent (SP) upon their illumination with UV or visible light. In contrast, the undoped TiO2 nanotubes only showed the SP, which was higher than that reached with the Ru-doped photoanodes using UV light. An exception was the Ru(0.15 wt%)-doped TiO2, whose SP was comparable under visible light. Using that anode, the activity enhancement during the PEC treatment of a Terasil Blue dye solution at Ebias(PP) was much higher than that attained at Ebias(SP). The percentage of color removal at 120 min with the Ru(0.15 wt%)-doped TiO2 was 98% and 55% in PEC with UV and visible light, respectively, being much greater than 82% and 28% achieved in photocatalysis. The moderate visible-light photoactivity of the Ru-doped TiO2 nanotube arrays suggests their convenience to work under solar PEC conditions, aiming at using a large portion of the solar spectrum.
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Affiliation(s)
- Patricia García-Ramírez
- Posgrado de Doctorado en Ingeniería y Ciencias Aplicadas, Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma Del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos, C.P. 62209, Mexico
| | - Erik Ramírez-Morales
- División Académica de Ingeniería y Arquitectura, Universidad Juárez Autónoma de Tabasco, Av. Universidad S/N, Col. Magisterial, C.P. 86040, Villahermosa, Tabasco, Mexico
| | - Juan Carlos Solis Cortazar
- Posgrado en Ciencias en Ingeniería, Universidad Juárez Autónoma de Tabasco, Av. Universidad S/N, Col. Magisterial, C.P. 86040, Villahermosa, Tabasco, Mexico
| | - 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.
| | - Susana Silva-Martínez
- Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma Del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, C.P. 62209, Cuernavaca, Morelos, Mexico.
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Torres NH, Santos GDOS, Romanholo Ferreira LF, Américo-Pinheiro JHP, Eguiluz KIB, Salazar-Banda GR. Environmental aspects of hormones estriol, 17β-estradiol and 17α-ethinylestradiol: Electrochemical processes as next-generation technologies for their removal in water matrices. CHEMOSPHERE 2021; 267:128888. [PMID: 33190907 DOI: 10.1016/j.chemosphere.2020.128888] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/02/2020] [Accepted: 11/04/2020] [Indexed: 06/11/2023]
Abstract
Hormones as a group of emerging contaminants have been increasingly used worldwide, which has increased their concern at the environmental level in various matrices, as they reach the water bodies through effluents due to the ineffectiveness of conventional treatments. Here we review the environmental scenario of hormones estriol (E3), 17β-estradiol (E2), and 17α-ethinylestradiol (EE2), explicitly their origins, their characteristics, interactions, how they reach the environment, and, above all, the severe pathological and toxicological damage to animals and humans they produce. Furthermore, studies for the treatment of these endocrine disruptors (EDCs) are deepened using electrochemical processes as the remediation methods of the respective hormones. In the reported studies, these micropollutants were detected in samples of surface water, underground, soil, and sediment at concentrations that varied from ng L-1 to μg L-1 and are capable of causing changes in the endocrine system of various organisms. However, although there are studies on the ecotoxicological effects concerning E3, E2, and EE2 hormones, little is known about their environmental dispersion and damage in quantitative terms. Moreover, biodegradation becomes the primary mechanism of removal of steroid estrogens removal by sewage treatment plants, but it is still inefficient, which shows the importance of studying electrochemically-driven processes such as the Electrochemical Advanced Oxidation Processes (EAOP) and electrocoagulation for the removal of emerging micropollutants. Thus, this review covers information on the occurrence of these hormones in various environmental matrices, their respective treatment, and effects on exposed organisms for ecotoxicology purposes.
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Affiliation(s)
- Nádia Hortense Torres
- Institute of Technology and Research (ITP), Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, Sergipe, Brazil; Graduate Program in Process Engineering, Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, Sergipe, Brazil.
| | - Géssica de Oliveira Santiago Santos
- Institute of Technology and Research (ITP), Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, Sergipe, Brazil; Graduate Program in Process Engineering, Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, Sergipe, Brazil
| | - Luiz Fernando Romanholo Ferreira
- Institute of Technology and Research (ITP), Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, Sergipe, Brazil; Graduate Program in Process Engineering, Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, Sergipe, Brazil
| | | | - Katlin Ivon Barrios Eguiluz
- Institute of Technology and Research (ITP), Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, Sergipe, Brazil; Graduate Program in Process Engineering, Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, Sergipe, Brazil
| | - Giancarlo Richard Salazar-Banda
- Institute of Technology and Research (ITP), Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, Sergipe, Brazil; Graduate Program in Process Engineering, Tiradentes University (UNIT), Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju, Sergipe, Brazil
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265
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Liu Y, Deng YY, Zhang Q, Liu H. Overview of recent developments of resource recovery from wastewater via electrochemistry-based technologies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 757:143901. [PMID: 33310303 DOI: 10.1016/j.scitotenv.2020.143901] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/05/2020] [Accepted: 11/17/2020] [Indexed: 06/12/2023]
Abstract
As the rapid increase of the worldwide population, recovering valuable resources from wastewater have attracted more and more attention by governments and academia. Electrochemical technologies have been extensively investigated over the past three decades to purify wastewater. However, the application of these technologies for resource recovery from wastewater has just attracted limited attention. In this review, the recent (2010-2020) electrochemical technologies for resource recovery from wastewater are summarized and discussed for the first time. Fundamentals of typical electrochemical technologies are firstly summarized and analyzed, followed by the specific examples of electrochemical resource recovery technologies for different purposes. Based on the fundamentals of electrochemical reactions and without the addition of chemical agents, metallic ions, nutrients, sulfur, hydrogen and chemical compounds can be effectively recovered by means of electrochemical reduction, electrochemical induced precipitation, electrochemical stripping, electrochemical oxidation and membrane-based electrochemical processes, etc. Pros and cons of each electrochemical technology in practical applications are discussed and analyzed. Single-step electrochemical process seems ineffectively to recover valuable resources from the wastewater with complicated constituents. Multiple-step processes or integrated with biological and membrane-based technologies are essential to improve the performance and purity of products. Consequently, this review attempts to offer in-depth insights into the developments of next-generation of electrochemical technologies to minimize energy consumption, boost recovery efficiency and realize the commercial application.
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Affiliation(s)
- Yuan Liu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Sciences, Chongqing 400714, China.
| | - Ying-Ying Deng
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Sciences, Chongqing 400714, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qi Zhang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Sciences, Chongqing 400714, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong Liu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Key Laboratory of Reservoir Aquatic Environment, Chinese Academy of Sciences, Chongqing 400714, China
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266
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Lin H, Xiao R, Xie R, Yang L, Tang C, Wang R, Chen J, Lv S, Huang Q. Defect Engineering on a Ti 4O 7 Electrode by Ce 3+ Doping for the Efficient Electrooxidation of Perfluorooctanesulfonate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:2597-2607. [PMID: 33502168 DOI: 10.1021/acs.est.0c06881] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Defect engineering in an electrocatalyst, such as doping, has the potential to significantly enhance its catalytic activity and stability. Herein, we report the use of a defect engineering strategy to enhance the electrochemical reactivity of Ti4O7 through Ce3+ doping (1-3 at. %), resulting in the significantly accelerated interfacial charge transfer and yielding a 37-129% increase in the anodic production of the hydroxyl radical (OH•). The Ce3+-doped Ti4O7 electrodes, [(Ti1-xCex)4O7], also exhibited a more stable electrocatalytic activity than the pristine Ti4O7 electrode so as to facilitate the long-term operation. Furthermore, (Ti1-xCex)4O7 electrodes were also shown to effectively mineralize perfluorooctanesulfonate (PFOS) in electrooxidation processes in both a trace-concentration river water sample and a simulated preconcentration waste stream sample. A 3 at. % dopant amount of Ce3+ resulted in a PFOS oxidation rate 2.4× greater than that of the pristine Ti4O7 electrode. X-ray photoelectron spectroscopy results suggest that Ce3+ doping created surficial oxygen vacancies that may be responsible for the enhanced electrochemical reactivity and stability of the (Ti1-xCex)4O7 electrodes. Results of this study provide insights into the defect engineering strategy for boosting the electrochemical performance of the Ti4O7 electrode with a robust reactivity and stability.
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Affiliation(s)
- Hui Lin
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Runlin Xiao
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Ruzhen Xie
- College of Architecture and Environment, Sichuan University, Chengdu 610065, P. R. China
| | - Lihui Yang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Caiming Tang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Rongrong Wang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Jie Chen
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Sihao Lv
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan523808, P. R. China
| | - Qingguo Huang
- Department of Crop and Soil Sciences, College of Agricultural and Environmental Sciences, University of Georgia, Griffin, Georgia 30223, United States
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267
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Trellu C, Pechaud Y, Oturan N, Mousset E, van Hullebusch ED, Huguenot D, Oturan MA. Remediation of soils contaminated by hydrophobic organic compounds: How to recover extracting agents from soil washing solutions? JOURNAL OF HAZARDOUS MATERIALS 2021; 404:124137. [PMID: 33049627 DOI: 10.1016/j.jhazmat.2020.124137] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 09/07/2020] [Accepted: 09/27/2020] [Indexed: 06/11/2023]
Abstract
A lot of soil (particularly, former industrial and military sites) has been contaminated by various highly toxic contaminants such as petroleum hydrocarbons, polycyclic aromatic hydrocarbons (PAHs), polychlorobiphenyls (PCBs) or chlorinated solvents. Soil remediation is now required for their promotion into new industrial or real estate activities. Therefore, the soil washing (SW) process enhanced by the use of extracting agents (EAs) such as surfactants or cyclodextrins (CDs) has been developed for the removal of hydrophobic organic compounds (HOCs) from contaminated soils. The use of extracting agents allows improving the transfer of HOCs from the soil-sorbed fraction to the washing solution. However, using large amount of extracting agents is also a critical drawback for cost-effectiveness of the SW process. The aim of this review is to examine how extracting agents might be recovered from SW solutions for reuse. Various separation processes are able to recover large amounts of extracting agents according to the physicochemical characteristics of target pollutants and extracting agents. However, an additional treatment step is required for the degradation of recovered pollutants. SW solutions may also undergo degradation processes such as advanced oxidation processes (AOPs) with in situ production of oxidants. Partial recovery of extracting agents can be achieved according to operating conditions and reaction kinetics between organic compounds and oxidant species. The suitability of each process is discussed according to the various physicochemical characteristics of SW solutions. A particular attention is paid to the anodic oxidation process, which allows either a selective degradation of the target pollutants or a complete removal of the organic load depending on the operating conditions.
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Affiliation(s)
- Clément Trellu
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France.
| | - Yoan Pechaud
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France
| | - Nihal Oturan
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France
| | - Emmanuel Mousset
- Laboratoire Réactions et Génie des Procédés, Université de Lorraine, CNRS, LRGP, F-54000 Nancy, France
| | - Eric D van Hullebusch
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France
| | - David Huguenot
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France
| | - Mehmet A Oturan
- Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France.
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268
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Lin H, Peng H, Feng X, Li X, Zhao J, Yang K, Liao J, Cheng D, Liu X, Lv S, Xu J, Huang Q. Energy-efficient for advanced oxidation of bio-treated landfill leachate effluent by reactive electrochemical membranes (REMs): Laboratory and pilot scale studies. WATER RESEARCH 2021; 190:116790. [PMID: 33508906 DOI: 10.1016/j.watres.2020.116790] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 12/08/2020] [Accepted: 12/24/2020] [Indexed: 06/12/2023]
Abstract
This study for the first time investigated the advanced treatment of bio-treated landfill leachate effluent using a novel reactive electrochemical membrane (REM) technology at the laboratory and pilot scales. At the laboratory scale, RuO2-Ir-REM, Ti4O7-REM, and β-PbO2-REM featured similar properties in pore size and water flux. Although RuO2-Ir-REM holds more reactive sites than the other two REMs, β-PbO2-REM and Ti4O7-REM featured higher oxidation ability than RuO2-Ir-REM, causing their high yield of hydroxyl radical. Consequently, β-PbO2-REM and Ti4O7-REM performed better than RuO2-Ir-REM, which removed total organic carbon and ammonia nitrogen by 70%-76% and 100%, respectively, after 45 minutes of treatment. Fluorescence spectroscopy analysis showed that humic acid-like substances were oxidized by the REM treatment. Using the β-PbO2-REM in the lab-scale setup with the solutions circulated, we observed a greater removal of chemical oxygen demand (COD) at a higher applied current or a faster water flux. The pilot system with four large size of β-PbO2-REMs modules in series was developed based on the lab-scale setup, which steadily treated landfill leachate in compliance with the disposal regulations of China, at an energy consumption of 3.6 kWh/m3. Also, a single-pass REM can effectively prevent the transformation of chloride to chlorate and perchlorate. Our study showed REM technology is a powerful and promising process for the advanced treatment of landfill leachate.
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Affiliation(s)
- Hui Lin
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China.
| | - Hanjun Peng
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Xingwei Feng
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Xiaojing Li
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Jinbo Zhao
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Kui Yang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Jianbo Liao
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Dengmiao Cheng
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Xinhui Liu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China
| | - Sihao Lv
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Jiale Xu
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, Arizona 85721, United States.
| | - Qingguo Huang
- College of Agricultural and Environmental Sciences, Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223, United States
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269
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Hu X, Dong H, Zhang Y, Fang B, Jiang W. Mechanism of N, N-dimethylformamide electrochemical oxidation using a Ti/RuO 2-IrO 2 electrode. RSC Adv 2021; 11:7205-7213. [PMID: 35423280 PMCID: PMC8694957 DOI: 10.1039/d0ra10181h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 02/05/2021] [Indexed: 11/21/2022] Open
Abstract
The compound N,N-dimethylformamide (DMF) is a widely used industrial chemical and a common environmental contaminant that has been found to be harmful to human health. In this study, electrochemical oxidation was adopted for the degradation of DMF. The effects of four kinds of electrodes on the removal rates of DMF and total organic carbon were compared, and based on the result, the Ti/RuO2–IrO2 electrode was selected as the operating electrode. The effects of three independent factors (current density, pH, and NaCl proportion) on the DMF degradation were investigated through single-factor experiments, and the experimental results were optimized by response surface methodology. The optimal experimental conditions were obtained as follows: current density = 47 mA cm−2, pH = 5.5, and NaCl proportion = 15%. The electrochemical oxidation of 50 mg L−1 DMF was performed under the optimal conditions; the degradation rate was 97.2% after 7 h, and the reaction followed the pseudo-first-order kinetic model. The degradation products under optimal conditions and chlorine-free conditions were analyzed, and four degradation pathways were proposed. The DMF degradation was more thorough under optimal conditions. DEMS as an emerging technology was used to investigate the degradation mechanism of DMF.![]()
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Affiliation(s)
- Xuyang Hu
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Ji'nan 250353 China
| | - Hao Dong
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Ji'nan 250353 China
| | - Yinghao Zhang
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Ji'nan 250353 China
| | - Baihui Fang
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Ji'nan 250353 China
| | - Wenqiang Jiang
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Ji'nan 250353 China
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270
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Treatment of Tebuthiuron in synthetic and real wastewater using electrochemical flow-by reactor. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.114978] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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271
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272
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Jiang Y, Zhao H, Liang J, Yue L, Li T, Luo Y, Liu Q, Lu S, Asiri AM, Gong Z, Sun X. Anodic oxidation for the degradation of organic pollutants: Anode materials, operating conditions and mechanisms. A mini review. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2020.106912] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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273
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Sun W, Yao Y. Degradation of Auramine-O in Aqueous Solution by Ti/PbO2-Electro-Fenton Process by Hydrogen Peroxide Produced In Situ. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY, TRANSACTIONS A: SCIENCE 2021. [DOI: 10.1007/s40995-020-00975-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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274
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Guo D, Guo Y, Huang Y, Chen Y, Dong X, Chen H, Li S. Preparation and electrochemical treatment application of Ti/Sb-SnO 2-Eu&rGO electrode in the degradation of clothianidin wastewater. CHEMOSPHERE 2021; 265:129126. [PMID: 33288288 DOI: 10.1016/j.chemosphere.2020.129126] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/04/2020] [Accepted: 11/24/2020] [Indexed: 06/12/2023]
Abstract
This work investigated the preparation of Ti/Sb-SnO2 electrode co-doped with graphene and europium and the electrochemical degradation of clothianidin in aqueous solution with Ti/Sb-SnO2-Eu&rGO electrode. The physicochemical properties of different electrodes were characterized by using the scanning electron microscopy, X-ray diffraction, oxygen evolution potential and cyclic voltammetry tests. The results indicated that the Ti/Sb-SnO2-Eu&rGO electrodes have a compact structure and fine grain size and have a higher oxygen evolution overpotential than Ti/Sb-SnO2-None, Ti/Sb-SnO2-Eu and Ti/Sb-SnO2-rGO electrodes. Among the four electrodes, the Ti/Sb-SnO2-Eu&rGO electrode showed the highest efficiency and was chosen as the experimental electrode. The main influence factors on the degradation of clothianidin, such as initial pH, electrolyte concentration, current density and initial concentration of clothianidin, were analyzed. The results showed that the removal rate of clothianidin can reach 96.44% under the optimal conditions for 120 min treatment. Moreover, a possible degradation pathway including the fracture of internal bonds of clothianidin such as the N-N bond, the C-N bond that connects nitroguanidine to the thiazole ring and mineralization was elucidated by intermediate products identified by HPLC-MS method and Fourier transform infrared spectroscopy (FTIR). This paper introduces the Ti/Sb-SnO2-Eu&rGO electrode into an electrocatalytic degradation system and could provide basic data and technique support and guidance for the clothianidin wastewater pollution control.
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Affiliation(s)
- Dan Guo
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Yongbo Guo
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Yixuan Huang
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Yongyang Chen
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Xiaochun Dong
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Hao Chen
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Shanping Li
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Qingdao, 266237, China.
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275
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Zhou C, Wang Y, Tang S, Wang Y, Yu H, Niu J. Insights into the electrochemical degradation of triclosan from human urine: Kinetics, mechanism and toxicity. CHEMOSPHERE 2021; 264:128598. [PMID: 33068970 DOI: 10.1016/j.chemosphere.2020.128598] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 10/05/2020] [Accepted: 10/07/2020] [Indexed: 06/11/2023]
Abstract
Electrochemical degradation of triclosan in human urine was firstly studied by using Ti/SnO2-Sb/PbO2 anode doped with rare-earth elements. The results indicated that the Ti/SnO2-Sb/Gd-PbO2 anode demonstrated the best performance with the degradation rate constants being 0.095 min-1 in fresh urine and 0.045 min-1 in hydrolyzed urine at a current density of 10 mA cm-2. The electrochemical degradation was improved in the presence of phosphate and chloride, while the degradation was obviously inhibited by urea, bicarbonate and ammonia. Degradation mechanism mainly involved ether-bond cleavage, hydroxylation, cyclization, dehydrogenation and carboxylation. Quantitative structure-activity relationship model showed that ecological risks of cyclization products to fish, daphnid and green algae was higher than the parent compound, implying that the potential risks to aquatic organism should not be ignored before triclosan mineralized completely. Energy consumption for 90% triclosan degradation ranged from 4.5 to 47.8 Wh L-1, and the consumption increased along with the hydrolysis of urine. The results indicate that electrochemical oxidation is a feasible and energy-saving technique to effectively remove triclosan from human urine.
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Affiliation(s)
- Chengzhi Zhou
- Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Yanping Wang
- Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Shaoyu Tang
- Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Ya Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Haiying Yu
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Junfeng Niu
- Research Center for Eco-environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China.
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276
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Hiwarkar AD, Chauhan R, Patidar R, Srivastava VC, Singh S, Mall ID. Binary electrochemical mineralization of heterocyclic nitrogenous compounds: parametric optimization using Taguchi method and mineralization mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:7332-7346. [PMID: 33025446 DOI: 10.1007/s11356-020-11057-8] [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: 05/28/2020] [Accepted: 09/28/2020] [Indexed: 06/11/2023]
Abstract
The main objective of the present work was to understand the interactive behaviour of various operating parameters including concentration of pollutants during binary electrochemical mineralization of the two nitrogenous heterocyclic pollutants in the aqueous solution. Indole and pyrrole were selected as pollutants, whereas Pt/Ti was selected as anode and cathode. The effects of different operating parameters like current density, solution conductivity, initial concentration of the pollutants and time were studied. Taguchi method was used to optimize these operating parameters for obtaining the ultimate rate of degradation for the nitrogenous compounds. There were basically two responses, i.e. chemical oxygen demand (COD) degradation and specific energy consumption. These responses were maximized and minimized, respectively. At the optimum condition, removal efficiencies of pyrrole, indole and COD were found to be 46.1%, 62.4% and 61.4%, respectively. The optimum value of specific energy consumption was found to be 159.5 kWh per kg COD removed. Possible mineralization pathways are also proposed on the basis of the identified intermediates by gas chromatography coupled with mass spectroscopy. The operating cost was also calculated for the binary lab-scale treatment of the indole and pyrrole and compared with reported cost analysis for the electrochemical treatment.
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Affiliation(s)
- Ajay Devidas Hiwarkar
- Department of Chemical Engineering, Indian Institute of Technology, Roorkee, Roorkee, Uttarakhand, 247667, India
- Department of Chemical Engineering, Bundelkhand Institute of Engineering and Technology, Jhansi, Uttar Pradesh, 284128, India
| | - Rohit Chauhan
- Department of Chemical Engineering, Indian Institute of Technology, Roorkee, Roorkee, Uttarakhand, 247667, India
| | - Ritesh Patidar
- Department of Chemical Engineering, Indian Institute of Technology, Roorkee, Roorkee, Uttarakhand, 247667, India
| | - Vimal Chandra Srivastava
- Department of Chemical Engineering, Indian Institute of Technology, Roorkee, Roorkee, Uttarakhand, 247667, India.
| | - Seema Singh
- Department of Chemical Engineering, Indian Institute of Technology, Roorkee, Roorkee, Uttarakhand, 247667, India
| | - Indra Deo Mall
- Department of Chemical Engineering, Indian Institute of Technology, Roorkee, Roorkee, Uttarakhand, 247667, India
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277
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Inhibition of staphylococci and S. aureus in wastewater by ferrates and electrochemical methods. ACTA CHIMICA SLOVACA 2021. [DOI: 10.2478/acs-2020-0023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Increasing concentration of antibiotics in environment and their subinhibitory concentrations in wastewater may result in increased antibiotic resistance of present bacteria. Therefore, this study was aimed to analyze the efficiency of coagulase-positive staphylococci and Staphylococcus aureus inhibition in wastewater by electrochemical methods and addition of ferrates. Advanced electrochemical oxidation by boron doped diamond electrodes in anode; cathode and anode-cathode connection were used for wastewater disinfection. Results showed that the most effective connection was the anodic one, as complete inhibition of coagulase-positive staphylococci as well as of S. aureus was observed after 40 min. Energy consumption was 3.69 kWh/m3 for effluent wastewater disinfection. The second studied method of wastewater disinfection was the application of powdered ferrates. Addition of 100 mg of ferrates resulted in the inhibition of 84—96 % of coagulase-positive staphylococci and 97—99 % of S. aureus in influent water, while the inhibition of coagulase-positive staphylococci and S. aureus was 61—83 % and 83—86 %, respectively, in effluent wastewater.
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278
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Kiendrebeogo M, Karimi Estahbanati MR, Khosravanipour Mostafazadeh A, Drogui P, Tyagi RD. Treatment of microplastics in water by anodic oxidation: A case study for polystyrene. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 269:116168. [PMID: 33333450 DOI: 10.1016/j.envpol.2020.116168] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/23/2020] [Accepted: 11/25/2020] [Indexed: 06/12/2023]
Abstract
Water pollution by microplastics (MPs) is a contemporary issue which has recently gained lots of attentions. Despite this, very limited studies were conducted on the degradation of MPs. In this paper, we reported the treatment of synthetic mono-dispersed suspension of MPs by using electrooxidation (EO) process. MPs synthetic solution was prepared with distilled water and a commercial polystyrene solution containing a surfactant. In addition to anode material, different operating parameters were investigated such as current intensity, anode surface, electrolyte type, electrolyte concentration, and reaction time. The obtained results revealed that the EO process can degrade 58 ± 21% of MPs in 1 h. Analysis of the operating parameters showed that the current intensity, anode material, electrolyte type, and electrolyte concentration substantially affected the MPs removal efficiency, whereas anode surface area had a negligible effect. In addition, dynamic light scattering analysis was performed to evaluate the size distribution of MPs during the degradation. The combination of dynamic light scattering, scanning electron microscopy, total organic carbon, and Fourier-transform infrared spectroscopy results suggested that the MPs did not break into smaller particles and they degrade directly into gaseous products. This work demonstrated that EO is a promising process for degradation of MPs in water without production of any wastes or by-products.
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Affiliation(s)
- Marthe Kiendrebeogo
- Institut National de la recherche scientifique (INRS) - Centre Eau Terre Environnement (ETE), 490 rue de la Couronne, Québec (QC), Canada, G1K 9A9
| | - M R Karimi Estahbanati
- Institut National de la recherche scientifique (INRS) - Centre Eau Terre Environnement (ETE), 490 rue de la Couronne, Québec (QC), Canada, G1K 9A9
| | - Ali Khosravanipour Mostafazadeh
- Institut National de la recherche scientifique (INRS) - Centre Eau Terre Environnement (ETE), 490 rue de la Couronne, Québec (QC), Canada, G1K 9A9
| | - Patrick Drogui
- Institut National de la recherche scientifique (INRS) - Centre Eau Terre Environnement (ETE), 490 rue de la Couronne, Québec (QC), Canada, G1K 9A9.
| | - R D Tyagi
- Institut National de la recherche scientifique (INRS) - Centre Eau Terre Environnement (ETE), 490 rue de la Couronne, Québec (QC), Canada, G1K 9A9
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279
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Mo Y, Du M, Cui S, Wang H, Zhao X, Zhang M, Li J. Simultaneously enhancing degradation of refractory organics and achieving nitrogen removal by coupling denitrifying biocathode with MnO x/Ti anode. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123467. [PMID: 32712363 DOI: 10.1016/j.jhazmat.2020.123467] [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: 06/02/2020] [Revised: 07/07/2020] [Accepted: 07/10/2020] [Indexed: 06/11/2023]
Abstract
To simultaneously remove carbon and nitrogen from refractory organic wastewater, this study couples the denitrifying biocathode and MnOx/Ti anode to oxidize refractory organic pollutants in the anode chamber and remove NO3--N in the cathode chamber (denitrifying biocathode-electrocatalytic reactor, DBECR). After inoculation, DBECR started up at 1.3 and 1.5 V with NO3--N reduction peak appearing on the cyclic voltammetry curve and increased NO3--N removal by approximately 90 %. Compared to the electrocatalytic reactor without inoculation (ECR), NO3--N removal of DBECR significantly increased from 0.09 to 0.45 kg NO3--N/m3 NCC/d (NCC: net cathodic compartment). NO3--N removal correlated well with charges/current flowing through the circuit of DBECR, further validating the presence of electrotrophic denitrifiers. Moreover, coupling of denitrifying biocathode significantly enhanced methylene blue (MB) removal in the anode chamber (0.18 ± 0.002 and 2.92 ± 0.02 g COD/m2/d for ECR and DBECR, respectively). This was because the growth of eletrotrophic denitrifiers increased the cathodic potential and thus the potential of MnOx/Ti anode. The higher potential of MnOx/Ti anode promoted the generation of hydroxyl radicals and consequently promoted MB removal. This study demonstrated that DBECR not only realized nitrogen removal in the cathode chamber, but also enhanced refractory organic carbon degradation in the anode chamber.
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Affiliation(s)
- Yinghui Mo
- State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Membrane Science and Technology, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China.
| | - Manman Du
- State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Membrane Science and Technology, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Shuai Cui
- State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Membrane Science and Technology, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Hong Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Membrane Science and Technology, Tiangong University, Tianjin 300387, China; School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Xin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Ming Zhang
- School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Jianxin Li
- State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Membrane Science and Technology, Tiangong University, Tianjin 300387, China; School of Material Science and Engineering, Tiangong University, Tianjin 300387, China.
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280
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Santos JEL, Gómez MA, Moura DCD, Cerro-López M, Quiroz MA, Martínez-Huitle CA. Removal of herbicide 1-chloro-2,4-dinitrobenzene (DNCB) from aqueous solutions by electrochemical oxidation using boron-doped diamond (BDD) and PbO 2 electrodes. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123850. [PMID: 33254819 DOI: 10.1016/j.jhazmat.2020.123850] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 08/06/2020] [Accepted: 08/27/2020] [Indexed: 06/12/2023]
Abstract
The electrochemical removal of the 1-chloro-2,4-dinitrobenzene (DNCB) herbicide, a potentially carcinogenic agent from aqueous solutions, was performed at PbO2 and BDD electrodes by bulk electrolysis under galvanostatic control (300 and 400 A m-2) and under two pH conditions (3 and 9). Results clearly indicated that a 62 % of mineralization was achieved with BDD anode at pH 3, while only a 46 % of electrochemical oxidation (EO) was achieved at PbO2 electrode. The mineralization current efficiency (MCE) depended on the electrode material, current density, and pH conditions; but, for both PbO2 and BDD, high MCE was achieved at pH 3 and 300 A m-2, obtaining 2.54 % and 1.99 % for BDD and PbO2, respectively. The EO pathway depended on the electrocatalytic properties of each one of the anodes to produce hydroxyl radicals which attacked the DNCB molecule as well as the deactivating effects of the chlorine and nitro groups attached to the aromatic ring on the DNCB structure. Finally, HPLC analyses also showed that phenolic intermediates as well as carboxylic acids were formed, at a different extent, during the electrolysis process on both electrodes.
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Affiliation(s)
- José Eudes L Santos
- Universidade Federal do Rio Grande do Norte, CCET - Instituto de Química, Lagoa Nova, CEP 59.072-970, Natal, RN, Brazil.
| | - Martha A Gómez
- Universidad de las Américas Puebla, Departamento de Ciencias Químico Biológicas, Sta. Catarina Mártir s/n, Cholula 72820, Puebla, Mexico
| | - D Chianca de Moura
- Instituto de Educação Superior Presidente Kennedy (IFESP), Grupo Interdisciplinario de Cièncias, Lagoa Nova, CEP 59064-500, Natal, RN, Brazil
| | - M Cerro-López
- Universidad de las Américas Puebla, Departamento de Ciencias Químico Biológicas, Sta. Catarina Mártir s/n, Cholula 72820, Puebla, Mexico
| | - Marco A Quiroz
- Universidade Federal do Rio Grande do Norte, CCET - Instituto de Química, Lagoa Nova, CEP 59.072-970, Natal, RN, Brazil
| | - Carlos A Martínez-Huitle
- Universidade Federal do Rio Grande do Norte, CCET - Instituto de Química, Lagoa Nova, CEP 59.072-970, Natal, RN, Brazil.
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281
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Dong P, Wang H, Liu W, Wang S, Wang Y, Zhang J, Lin F, Wang Y, Zhao C, Duan X, Wang S, Sun H. Quasi-MOF derivative-based electrode for efficient electro-Fenton oxidation. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123423. [PMID: 32763710 DOI: 10.1016/j.jhazmat.2020.123423] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/23/2020] [Accepted: 07/05/2020] [Indexed: 06/11/2023]
Abstract
Developing efficient and robust materials for emerging electrodegradation of organic pollutants has attracted broad interests. In this study, a novel controlled pyrolysis approach was employed to fabricate a quasi-MOF derivative-based electrode by pyrolyzing MIL-101(Fe) anchored on a polyaniline-modified carbon fiber paper at 400 °C. The construction of the accessible Fe-O sites, and the in situ generation of Fe3O4 nanoparticles with graphene-like carbon layers coated, would enhance the electro-Fenton activity of the electrode, which was used as the cathode. The results showed that 100 % of 50 mg L-1 p-nitrophenol and 52 % total organic carbon were removed in 120 min under a current density of 5 mA cm-2, suggesting that the prepared electrode had a more efficient mineralization current efficiency and less energy consumption compared with electrodes before pyrolysis. Notably, the stability of the electrode was greatly improved, maintaining its outstanding performance even after ten runs. The plausible reaction mechanism and degradation pathway were also proposed. This new pyrolysis strategy is expected to serve as a paradigm for designing efficient electrode in electro-Fenton remediation field.
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Affiliation(s)
- Pei Dong
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Haolong Wang
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Wenjing Liu
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Shuaijun Wang
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China; School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia
| | - Yang Wang
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Jinqiang Zhang
- School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia
| | - Feifei Lin
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Yongqiang Wang
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Chaocheng Zhao
- State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China.
| | - Xiaoguang Duan
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Shaobin Wang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Hongqi Sun
- School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia.
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282
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Chen M, Zhao X, Wang C, Pan S, Zhang C, Wang Y. Electrochemical oxidation of reverse osmosis concentrates using macroporous Ti-ENTA/SnO 2-Sb flow-through anode: Degradation performance, energy efficiency and toxicity assessment. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123295. [PMID: 32659574 DOI: 10.1016/j.jhazmat.2020.123295] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 06/04/2020] [Accepted: 06/20/2020] [Indexed: 06/11/2023]
Abstract
Due to poor mass transfer performance and high energy consumption of the traditional electrochemical flow-by mode, this study developed a high-efficiency electrochemical oxidation system in flow-through mode based on three-dimensional macroporous enhanced TiO2 nanotube array/SnO2-Sb (MP-Ti-ENTA/SnO2-Sb) anode. The effects of initial pH, current density and flow rate on the COD degradation of reverse osmosis concentrates (ROCs) from reclaimed wastewater plant were investigated. Besides, the energy efficiency, biodegradability and acute biotoxicity were studied during electrochemical flow-through process. Compared with the flow-by mode, the flow-through mode based on the MP-Ti-ENTA/SnO2-Sb anode had a COD removal rate of 0.38 mg min-1 (current density: 5 mA cm-2) and an electrical efficiency per order (EE/O) of 5.3 kW h m-3. The three-dimensional fluorescence spectrum showed that the fulvic acids, humic acids and soluble microbial metabolites of ROCs could be effectively removed by the flow-through anode. In addition, the luminescence inhibition rate of the effluent was 22.4 %, indicating that the acute biotoxicity was reduced by more than 40 %. The electrochemical flow-through process of ROCs treatment required relatively low energy consumption without extra chemical agent addition, showing a broader application prospect.
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Affiliation(s)
- Min Chen
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China
| | - Xin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China.
| | - Can Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China.
| | - Shuang Pan
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China
| | - Cong Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China
| | - Yingcai Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China
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283
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Scheide MR, Nicoleti CR, Martins GM, Braga AL. Electrohalogenation of organic compounds. Org Biomol Chem 2021; 19:2578-2602. [DOI: 10.1039/d0ob02459g] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this review we target sp, sp2 and sp3 carbon fluorination, chlorination, bromination and iodination reactions using electrolysis as a redox medium. Mechanistic insights and substrate reactivity are also discussed.
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Affiliation(s)
- Marcos R. Scheide
- Departamento de Química
- Universidade Federal de Santa Catarina – UFSC
- Florianópolis
- Brazil
| | - Celso R. Nicoleti
- Departamento de Química
- Universidade Federal de Santa Catarina – UFSC
- Florianópolis
- Brazil
| | - Guilherme M. Martins
- Departamento de Química
- Universidade Federal de Santa Catarina – UFSC
- Florianópolis
- Brazil
| | - Antonio L. Braga
- Departamento de Química
- Universidade Federal de Santa Catarina – UFSC
- Florianópolis
- Brazil
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284
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Jhones Dos Santos A, Sirés I, Brillas E. Removal of bisphenol A from acidic sulfate medium and urban wastewater using persulfate activated with electroregenerated Fe 2. CHEMOSPHERE 2021; 263:128271. [PMID: 33297215 DOI: 10.1016/j.chemosphere.2020.128271] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/02/2020] [Accepted: 09/03/2020] [Indexed: 05/03/2023]
Abstract
Model solutions of bisphenol A (BPA) in 0.050 M Na2SO4 at pH 3.0 have been treated by the electro/Fe2+/persulfate process. The activation of 5.0 mM persulfate with 0.20 mM Fe2+ yielded a mixture of sulfate radical anion (SO4-) and OH, although quenching tests revealed the prevalence of the former species as the main oxidizing agent. In trials run in an IrO2/carbon-felt cell, 98.4% degradation was achieved alongside 61.8% mineralization. The energy consumption was 253.9 kWh (kg TOC)-1, becoming more cost-effective as compared to cells with boron-doped diamond and Pt anodes. Carbon felt outperformed stainless steel as cathode because of the faster Fe2+ regeneration. All BPA concentration decays agreed with a pseudo-fist-order kinetics. The effect of persulfate, Fe2+ and BPA concentrations as well as of the applied current on the degradation process was assessed. Two dehydroxylated and three hydroxylated monobenzenic by-products appeared upon SO4- and OH attack, respectively. The analogous treatment of BPA spiked into urban wastewater yielded a faster degradation and mineralization due to the co-generation of HClO and the larger OH production as SO4- reacted with Cl-.
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Affiliation(s)
- Alexsandro Jhones Dos Santos
- Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès, 08028, Barcelona, 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, 08028, Barcelona, Spain
| | - Enric Brillas
- Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès, 08028, Barcelona, Spain.
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285
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Chaturvedi P, Giri BS, Shukla P, Gupta P. Recent advancement in remediation of synthetic organic antibiotics from environmental matrices: Challenges and perspective. BIORESOURCE TECHNOLOGY 2021; 319:124161. [PMID: 33007697 DOI: 10.1016/j.biortech.2020.124161] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 06/11/2023]
Abstract
Continuous discharge and persistence of antibiotics in aquatic ecosystem is identified as emerging environment health hazard. Partial degradation and inappropriate disposal induce appearance of diverse antibiotic resistant genes (ARGs) and bacteria, hence their execution is imperative. Conventional methods including waste water treatment plants (WWTPs) are found ineffective for the removal of recalcitrant antibiotics. Therefore, constructive removal of antibiotics from environmental matrices and other alternatives have been discussed. This review summarizes present scenario and removal of micro-pollutants, antibiotics from environment. Various strategies including physicochemical, bioremediation, use of bioreactor, and biocatalysts are recognized as potent antibiotic removal strategies. Microbial Fuel Cells (MFCs) and biochar have emerged as promising biodegradation processes due to low cost, energy efficient and environmental benignity. With higher removal rate (20-50%) combined/ hybrid processes seems to be more efficient for permanent and sustainable elimination of reluctant antibiotics.
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Affiliation(s)
- Preeti Chaturvedi
- Aquatic Toxicology Laboratory, Environmental Toxicology Group, Council of Scientific and Industrial Research-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, M.G. Marg, Lucknow 226001, Uttar Pradesh, India; Department of Biotechnology, National Institute of Technology-Raipur, G.E. Road, Raipur 492010, Chhattisgarh, India.
| | - Balendu Shekher Giri
- Aquatic Toxicology Laboratory, Environmental Toxicology Group, Council of Scientific and Industrial Research-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, M.G. Marg, Lucknow 226001, Uttar Pradesh, India
| | - Parul Shukla
- Aquatic Toxicology Laboratory, Environmental Toxicology Group, Council of Scientific and Industrial Research-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, M.G. Marg, Lucknow 226001, Uttar Pradesh, India
| | - Pratima Gupta
- Department of Biotechnology, National Institute of Technology-Raipur, G.E. Road, Raipur 492010, Chhattisgarh, India
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286
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Dinh HTT, Kambara H, Harada Y, Matsushita S, Aoi Y, Kindaichi T, Ozaki N, Ohashi A. Bioelectrical Methane Production with an Ammonium Oxidative Reaction under the No Organic Substance Condition. Microbes Environ 2021; 36. [PMID: 34135211 PMCID: PMC8209456 DOI: 10.1264/jsme2.me21007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The present study investigated bioelectrical methane production from CO2 without organic substances. Even though microbial methane production has been reported at relatively high electric voltages, the amount of voltage required and the organisms contributing to the process currently remain unknown. Methane production using a biocathode was investigated in a microbial electrolysis cell coupled with an NH4+ oxidative reaction at an anode coated with platinum powder under a wide range of applied voltages and anaerobic conditions. A microbial community analysis revealed that methane production simultaneously occurred with biological denitrification at the biocathode. During denitrification, NO3– was produced by chemical NH4+ oxidation at the anode and was provided to the biocathode chamber. H2 was produced at the biocathode by the hydrogen-producing bacteria Petrimonas through the acceptance of electrons and protons. The H2 produced was biologically consumed by hydrogenotrophic methanogens of Methanobacterium and Methanobrevibacter with CO2 uptake and by hydrogenotrophic denitrifiers of Azonexus. This microbial community suggests that methane is indirectly produced without the use of electrons by methanogens. Furthermore, bioelectrical methane production occurred under experimental conditions even at a very low voltage of 0.05 V coupled with NH4+ oxidation, which was thermodynamically feasible.
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Affiliation(s)
- Ha T T Dinh
- Department of Civil and Environmental Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University.,Faculty of Environment, Ho Chi Minh City University of Natural Resources and Environment
| | - Hiromi Kambara
- Department of Civil and Environmental Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University
| | - Yoshiki Harada
- Department of Civil and Environmental Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University
| | - Shuji Matsushita
- Department of Civil and Environmental Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University.,Agricultural Technology Research Center, Hiroshima Prefectural Technology Research Institute
| | - Yoshiteru Aoi
- Program of Biotechnology, Graduate School of Integrated Sciences for Life, Hiroshima University
| | - Tomonori Kindaichi
- Department of Civil and Environmental Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University
| | - Noriatsu Ozaki
- Department of Civil and Environmental Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University
| | - Akiyoshi Ohashi
- Department of Civil and Environmental Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University
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287
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Alagesan J, Jaisankar M, Muthuramalingam S, Mousset E, Chellam PV. Influence of number of azo bonds and mass transport limitations towards the elimination capacity of continuous electrochemical process for the removal of textile industrial dyes. CHEMOSPHERE 2021; 262:128381. [PMID: 33182108 DOI: 10.1016/j.chemosphere.2020.128381] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/10/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
This study focusses on the electrochemical decomposition of synthetic azo dyes (RO16, RR120 and DR80) using stainless steel electrodes, which is efficient, cost effective and industrially driven process. The experiments were carried out in a continuous electrochemical reactor and the effects of influencing parameters (initial concentration of dye, electrolyte concentration, pH) governing the process efficiency was studied. The interaction between the influencing parameters was investigated using Response Surface Methodology (RSM) and the regression value obtained for the generated model was above 0.9 for all the three dyes. The elimination capacity of electrochemical reactor was studied for the continuous removal of azo dyes with different ranges of concentration (100-400 mg L-1) and flow rate (0.1-0.5 L h-1). The maximum elimination capacity was obtained at a flow rate of 0.5 L h-1 for 300 mg L-1 of initial concentration of dye for RO16 and RR120 whereas it was 0.5 L h-1 for 400 mg L-1 of DR80. Further, a general dimensionless current density relation has been established for stirred tank reactor and allowed characterizing the relationship between kinetics and mass transport contributing to the overall reaction rate. The results quantitatively confirmed that the rate of electrochemical decolorization increased with the increasing initial dye concentration and flow rate due to the mass transport limitation. As newly established, the decolorization is also directly linked to the number of azo bonds.
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Affiliation(s)
- Jaanavee Alagesan
- Centre for Research, Department of Biotechnology, Kamaraj College of Engineering & Technology, Madurai, Tamilnadu, India
| | - MecghaSri Jaisankar
- Centre for Research, Department of Biotechnology, Kamaraj College of Engineering & Technology, Madurai, Tamilnadu, India
| | - Sindhu Muthuramalingam
- Centre for Research, Department of Biotechnology, Kamaraj College of Engineering & Technology, Madurai, Tamilnadu, India
| | - Emmanuel Mousset
- Laboratoire Réactions et Génie des Procédés, UMR CNRS 7274, Université de Lorraine, 1 Rue Grandville BP 20451, 54001, Nancy Cedex, France.
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288
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Wang Y, He L, Lv G, Sun X. Experimental and theoretical insights into the RCS-Involved electro-catalytic transformation of 4-nitrophenol. CHEMOSPHERE 2021; 262:128015. [PMID: 33182116 DOI: 10.1016/j.chemosphere.2020.128015] [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: 04/23/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 05/09/2023]
Abstract
The important role of reactive chlorine species (RCS) in electrochemical system has been widely concerned for water disinfection recently. In this study, we built an electrochemical system using carbon nanotube as cathode and oxide precursor (Ti/SnO2-Sb2O5-IrO2) as anode, where RCS was produced from Cl-. This system was used to degrade nitrogen contaminants, i.e. NO3- and 4-nitrophenol. Optimization of the reaction conditions was carried out by a treatment of inorganic nitrogen contaminant NO3- and the optimal condition of the electrochemical system was determined at U = 5.5 V, and pH = 10 with a Cl- concentration of 2000 mg L-1, and the removal efficiency of NO3- can reach up to 60.6% in 150 min. Under the optimal condition, a common nitrogenous organic pollutant, 4-nitrophenol was treated and a removal efficiency of nearly 100% in 90 min. To investigate the detailed degradation mechanism in the applied electrochemical system, a combined method of products identification and density functional theory (DFT) calculation was employed. It concluded that Cl radicals' generation was stimulated was stimulated by the OH radicals after adding Cl- into the electrochemical system. These two radicals jointly promoted the transformation of 4-nitrophenol resulting in the formation of more toxic organic and inorganic substances. In addition, a conversion of organic nitro group to amino group leading to the formation of 4-aminophenol was found and explained by the indirect reduction theory.
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Affiliation(s)
- Yan Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Lin He
- Atmospheric Chemistry Department (ACD), Leibniz-Institute for Tropospheric Research (TROPOS), Leipzig, 04318, Germany.
| | - Guochun Lv
- Environment Research Institute, Shandong University, Qingdao, 266237, China
| | - Xiaomin Sun
- Environment Research Institute, Shandong University, Qingdao, 266237, China.
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289
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Zhang W, Ye W, Hu X, Liang W. Electrocatalytic degradation of humic acid using particle electrodes of activated carbon loaded with metallic cobalt. CHEMOSPHERE 2021; 263:128200. [PMID: 33297164 DOI: 10.1016/j.chemosphere.2020.128200] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 08/23/2020] [Accepted: 08/27/2020] [Indexed: 06/12/2023]
Abstract
A column granular electrode loaded with metallic cobalt was prepared using powder activated carbon (namely Co/AC) and used in a continuous electrochemical reactor to degrade humic acid (HA). The results of XRD indicated that the form of catalyst prepared at 600 °C for 4 h mainly consisted of Co0, whereas it consisted of CoO when prepared at 450-500 °C for 4 h. The Co0 possessed better catalytic effects in the degradation of HA than CoO. When C0 of HA was 200 mg L-1, the C/C0 approached 0.06-0.12 under 0.1 A, pH of 7.0, 0.01 M Na2SO4, and 20 min of hydraulic retention time (HRT). The current, HRT, initial pH, electrolyte type and concentration influenced the degradation of HA. The ESR signals indicated that both H∗ and OH were catalytically generated by Co/AC electrode. Compared to AC electrodes, the Co/AC electrodes showed a faster reaction Tafel slope (68 mV dec-1) and larger electrochemical double-layer capacitance (Cdl = 1.93 mF cm-2). The degradation and removal of HA was achieved by both the electro-oxidation and electro-reduction in the Co/AC electrode system.
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Affiliation(s)
- Wenwen Zhang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science & Engineering, Beijing Forestry University, Beijing, 100083, China.
| | - Wenjian Ye
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science & Engineering, Beijing Forestry University, Beijing, 100083, China.
| | - Xinxin Hu
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science & Engineering, Beijing Forestry University, Beijing, 100083, China.
| | - Wenyan Liang
- Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science & Engineering, Beijing Forestry University, Beijing, 100083, China.
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290
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291
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Chanikya P, Nidheesh P, Syam Babu D, Gopinath A, Suresh Kumar M. Treatment of dyeing wastewater by combined sulfate radical based electrochemical advanced oxidation and electrocoagulation processes. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117570] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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292
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Gaurav GK, Mehmood T, Kumar M, Cheng L, Sathishkumar K, Kumar A, Yadav D. Review on polycyclic aromatic hydrocarbons (PAHs) migration from wastewater. JOURNAL OF CONTAMINANT HYDROLOGY 2021; 236:103715. [PMID: 33199037 DOI: 10.1016/j.jconhyd.2020.103715] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/23/2020] [Accepted: 09/14/2020] [Indexed: 06/11/2023]
Abstract
Rapidly increasing global population and increased civilization has increased burden on potable water resources and results in larger volumes of wastewater. Physical wastewater management techniques has advanced for domestic usage and commercial effluent new conceptions about imminent wastewater treatment have been acclaimed for highly carcinogenic polycyclic aromatic hydrocarbon (PAH) compounds. The present review study emphasis on the assessment of several accessible PAHs treatment methods used in wastewater management. The elementary principles, contextual remediation mechanisms and recent development in PAHs removal practices have also been precisely explained. The comprehensive information regarding sources, dispersal, classification, physicochemical properties, PAHs toxicity for humans and aquatics life, conventional treatment procedures, and advanced oxidation processes specified can assist us to identify the PAHs problem and their intensity. The performance evaluation of different removal techniques are discussed in details and found that highest PAHs' reduction for 5-or 6-ring (99%,) while 3-ring (79% reduction) with oxidant dose of 1.64 mL/L using titanium catalyst. In case of MWTPs, with secondary techniques, the average removal efficiency found in the range of 81.1-92.9% while for AOPs are 32-99.3%. Here, overall yield through AOPs most suitable if process used with some catalyst enhanced the yield as well and suitable for high ring as well as low ring PAHs. Among various processes, advanced oxidation and catalytic oxidation processes are the most valuable and promising techniques for PAHs removal. Based on the given evidences, the AOPs coupled with catalysts have been decided as the most competent design for wastewater PAHs treatment.
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Affiliation(s)
- Gajendra Kumar Gaurav
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes and College of Civil, Hohai University, Nanjing 210098, PR China
| | - Tariq Mehmood
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes and College of Civil, Hohai University, Nanjing 210098, PR China
| | - Manoj Kumar
- Department of Mechanical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
| | - Liu Cheng
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes and College of Civil, Hohai University, Nanjing 210098, PR China.
| | - Kuppusamy Sathishkumar
- Key Laboratory of Integrated Regulation and Resource Development of shallow lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, PR China
| | - Amit Kumar
- Department of Chemical Engineering, Nirma University, Ahmedabad, India
| | - Deepak Yadav
- Department of Chemical Engineering, Harcourt Butler Technical University (Formerly HBTI), Kanpur, India.
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293
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Oliveira KSGC, Farinos RM, Veroli AB, Ruotolo LAM. Electrochemical incineration of glyphosate wastewater using three-dimensional electrode. ENVIRONMENTAL TECHNOLOGY 2021; 42:170-181. [PMID: 31140937 DOI: 10.1080/09593330.2019.1625563] [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: 01/20/2019] [Accepted: 05/20/2019] [Indexed: 06/09/2023]
Abstract
Anodic oxidation of recalcitrant organic compounds is still challenging concerning to the anode material and mass transport limitations imposed by the low concentration. In this work, we studied the degradation of a real wastewater containing glyphosate using an electrode of PbO2 electrodeposited on a three-dimensional matrix of reticulated vitreous carbon (RVC). The high mass transfer rate provided by the RVC/PbO2 anode is demonstrated. A Box-Behnken factorial design was used for a systematic analysis of the effects of current density, flow rate and temperature on the degradation and mineralisation kinetics, current efficiency and specific energy consumption. The optimised degradation performance was achieved applying 30 mA cm-2, 3000 mL min-1 and 50°C. As the flow rate increases from 150 to 1500 mL min-1, the current efficiency increases from 18% to 65% and the energy consumption dropped from 72 to 33 kWh kg-1 due to the mass transfer enhancement promoted by the porous matrix. The efficacy of the electrochemical process for the treatment of real effluents using the three-dimensional PbO2 has been demonstrated.
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Affiliation(s)
- Kaíque S G C Oliveira
- Department of Chemical Engineering, Federal University of São Carlos, São Carlos - SP, Brazil
| | - Rosimeire M Farinos
- Department of Chemical Engineering, Federal University of São Carlos, São Carlos - SP, Brazil
| | - Alyne B Veroli
- Department of Chemical Engineering, Federal University of São Carlos, São Carlos - SP, Brazil
| | - Luís A M Ruotolo
- Department of Chemical Engineering, Federal University of São Carlos, São Carlos - SP, Brazil
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294
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Graphitic Carbon Nitride-Based Composite in Advanced Oxidation Processes for Aqueous Organic Pollutants Removal: A Review. Processes (Basel) 2020. [DOI: 10.3390/pr9010066] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In recent decades, a growing number of organic pollutants released have raised worldwide concern. Graphitic carbon nitride (g-C3N4) has drawn increasing attention in environmental pollutants removal thanks to its unique electronic band structure and excellent physicochemical stability. This paper reviews the recent progress of g-C3N4-based composites as catalysts in various advanced oxidation processes (AOPs), including chemical, photochemical, and electrochemical AOPs. Strategies for enhancing catalytic performance such as element-doping, nanostructure design, and heterojunction construction are summarized in detail. The catalytic degradation mechanisms are also discussed briefly.
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295
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Seibert D, Zorzo CF, Borba FH, de Souza RM, Quesada HB, Bergamasco R, Baptista AT, Inticher JJ. Occurrence, statutory guideline values and removal of contaminants of emerging concern by Electrochemical Advanced Oxidation Processes: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 748:141527. [PMID: 33113672 DOI: 10.1016/j.scitotenv.2020.141527] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/23/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
A wide variety of chemical compounds are used in human activities; however, part of these compounds reach surface water, groundwater and even water considered for potable uses. Due to the limited efficiency of water treatment by the Water and Wastewater Treatment Plants, the presence of these compounds in natural and human consumption waters can be very harmful due to their high persistence and adverse effects; these characteristics define the contaminants of emerging concern (CECs). Water treatment by Electrochemical Advanced Oxidation Processes (EAOPs) has been evaluated as a promising process for the removal of persistent and recalcitrant organic contaminants. With this background, the present review aims to gather studies and information published between 2015 and 2020 regarding the occurrence of CECs in surface, potable and groundwater, its treatment by EAOPs, the main operating conditions and by-product generation of EAOPs, contaminant toxicity assessments and international statutory guideline values concerning CEC standards and allowable concentrations in the environment and treated drinking water. Therefore, in this review it was found that the compounds bisphenol A (BPA), diethyltoluamide (DEET), 17α-ethinyl estradiol (EE2), perfluorobutanoic acid (PFBA), carbamazepine, caffeine and atrazine were the most frequently detected in water sources, with concentrations ranging from 35.54-4800, 1.21-98, 0.005-38.5, 5-742.904, 0.0071-586, 0.89-1040, and 100-323 (ng L-1), respectively. Among the operational conditions of EAOPs, current density, pH and oxidant concentration are the main operational parameters that have an influence on these treatment technologies, besides the by-products generated, which might be removed by the integration of EAOPs with biological digestion treatments. Regarding the values of water quality standards, many CECs do not have established standard allowable concentration values, which represents a concern toward the possible toxic effects of these compounds on non-target organisms.
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Affiliation(s)
- Daiana Seibert
- Postgraduate Program of Chemical Engineering, State University of Maringa - UEM, Av. Colombo, 5790, Maringa, Parana CEP: 87020-900, Brazil.
| | - Camila F Zorzo
- Postgraduate Program of Environment and Sustainable Technologies, Federal University of Fronteira Sul, Rua Jacob Reinaldo Haupenthal 1580, 97900-00 Cerro Largo, RS, Brazil
| | - Fernando H Borba
- Postgraduate Program of Environment and Sustainable Technologies, Federal University of Fronteira Sul, Rua Jacob Reinaldo Haupenthal 1580, 97900-00 Cerro Largo, RS, Brazil
| | - Renata M de Souza
- Postgraduate Program of Chemical Engineering, State University of Maringa - UEM, Av. Colombo, 5790, Maringa, Parana CEP: 87020-900, Brazil
| | - Heloise B Quesada
- Postgraduate Program of Chemical Engineering, State University of Maringa - UEM, Av. Colombo, 5790, Maringa, Parana CEP: 87020-900, Brazil
| | - Rosângela Bergamasco
- Postgraduate Program of Chemical Engineering, State University of Maringa - UEM, Av. Colombo, 5790, Maringa, Parana CEP: 87020-900, Brazil
| | - Aline T Baptista
- Academic Department of Food and Chemical Engineering, Federal Technology University of Parana - UTFPR, Via Rosalina Maria dos Santos, 1233.CEP 87301-899 - Caixa Postal: 271, Campo Mourão, PR, Brazil
| | - Jonas J Inticher
- Postgraduate Program of Environment and Sustainable Technologies, Federal University of Fronteira Sul, Rua Jacob Reinaldo Haupenthal 1580, 97900-00 Cerro Largo, RS, Brazil
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296
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Souiad F, Rodrigues AS, Lopes A, Ciríaco L, Pacheco MJ, Bendaoud-Boulahlib Y, Fernandes A. Methiocarb Degradation by Electro-Fenton: Ecotoxicological Evaluation. Molecules 2020; 25:molecules25245893. [PMID: 33322793 PMCID: PMC7763907 DOI: 10.3390/molecules25245893] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/10/2020] [Accepted: 12/10/2020] [Indexed: 11/16/2022] Open
Abstract
This paper studies the degradation of methiocarb, a highly hazardous pesticide found in waters and wastewaters, through an electro-Fenton process, using a boron-doped diamond anode and a carbon felt cathode; and evaluates its potential to reduce toxicity towards the model organism Daphnia magna. The influence of applied current density and type and concentration of added iron source, Fe2(SO4)3·5H2O or FeCl3·6H2O, is assessed in the degradation experiments of methiocarb aqueous solutions. The experimental results show that electro-Fenton can be successfully used to degrade methiocarb and to reduce its high toxicity towards D. magna. Total methiocarb removal is achieved at the applied electric charge of 90 C, and a 450× reduction in the acute toxicity towards D. magna, on average, from approximately 900 toxic units to 2 toxic units, is observed at the end of the experiments. No significant differences are found between the two iron sources studied. At the lowest applied anodic current density, 12.5 A m−2, an increase in iron concentration led to lower methiocarb removal rates, but the opposite is found at the highest applied current densities. The highest organic carbon removal is obtained at the lowest applied current density and added iron concentration.
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Affiliation(s)
- Faléstine Souiad
- FibEnTech-UBI, Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal; (F.S.); (A.S.R.); (A.L.); (L.C.); (M.J.P.)
- Département de Chimie, Faculté des Sciences Exactes, Université Constantine 1, 25000 Constantine, Algerie;
| | - Ana Sofia Rodrigues
- FibEnTech-UBI, Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal; (F.S.); (A.S.R.); (A.L.); (L.C.); (M.J.P.)
| | - Ana Lopes
- FibEnTech-UBI, Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal; (F.S.); (A.S.R.); (A.L.); (L.C.); (M.J.P.)
| | - Lurdes Ciríaco
- FibEnTech-UBI, Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal; (F.S.); (A.S.R.); (A.L.); (L.C.); (M.J.P.)
| | - Maria José Pacheco
- FibEnTech-UBI, Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal; (F.S.); (A.S.R.); (A.L.); (L.C.); (M.J.P.)
| | - Yasmina Bendaoud-Boulahlib
- Département de Chimie, Faculté des Sciences Exactes, Université Constantine 1, 25000 Constantine, Algerie;
| | - Annabel Fernandes
- FibEnTech-UBI, Department of Chemistry, Universidade da Beira Interior, 6201-001 Covilhã, Portugal; (F.S.); (A.S.R.); (A.L.); (L.C.); (M.J.P.)
- Correspondence:
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297
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Dos Santos AJ, Brillas E, Cabot PL, Sirés I. Simultaneous persulfate activation by electrogenerated H 2O 2 and anodic oxidation at a boron-doped diamond anode for the treatment of dye solutions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 747:141541. [PMID: 32795810 DOI: 10.1016/j.scitotenv.2020.141541] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/03/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
The development of new or upgraded electrochemical water treatment technologies is considered a topic of great interest. Here, Tartrazine azo dye solutions were treated by means of a quite innovative dual electrochemical persulfate (S2O82-, PS) activation that combines H2O2 generation at an air-diffusion cathode and anodic oxidation (AO) at a boron-doped diamond (BDD) anode using a stirred tank reactor. This so-called AO-H2O2/PS process was compared to AO with stainless steel cathode, both in 50 mM Na2SO4 medium, finding the oxidation power increasing as: AO < AO-H2O2 < AO/PS < AO-H2O2/PS. In the latter, the dye and its products were mainly destroyed by: (i) hydroxyl radicals, formed either from water oxidation at BDD surface or via reaction between H2O2 and S2O82-, and (ii) sulfate radical anion, formed from the latter reaction, thermal PS activation and cathodic S2O82- reduction. Hydroxyl radicals prevailed as oxidizing agents, as deduced from trials with tert-butanol and methanol. The reaction between S2O82- and accumulated H2O2 was favored as temperature increased from 25 to 45 °C. The effect of PS content up to 36 mM, dye concentration within the range 0.22-0.88 mM, current density (j) between 8.3 and 33.3 mA cm-2 and pH between 3.0 and 9.0 on the process performance was examined. All decolorization profiles agreed with a pseudo-first-order kinetics. The best results for treating 0.44 mM dye were attained with 36 mM PS at pH 3.0, j = 16.7 mA cm-2 and 45 °C, yielding total loss of color, 62% TOC removal and 50% mineralization current efficiency after 360 min. The slow mineralization was attributed to the persistence of recalcitrant byproducts like maleic, acetic, oxalic, formic and oxamic acids. It is concluded that the novel AO-H2O2/PS process is more effective than AO/PS to treat Tartrazine solutions, being advisable to extend the study to other organic pollutants.
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Affiliation(s)
- Alexsandro Jhones Dos Santos
- 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
| | - Enric Brillas
- 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
| | - Pere L Cabot
- 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
| | - 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.
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298
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Zhao Y, Sun M, Wang X, Wang C, Lu D, Ma W, Kube SA, Ma J, Elimelech M. Janus electrocatalytic flow-through membrane enables highly selective singlet oxygen production. Nat Commun 2020; 11:6228. [PMID: 33277500 PMCID: PMC7718259 DOI: 10.1038/s41467-020-20071-w] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 10/28/2020] [Indexed: 01/06/2023] Open
Abstract
The importance of singlet oxygen (1O2) in the environmental and biomedical fields has motivated research for effective 1O2 production. Electrocatalytic processes hold great potential for highly-automated and scalable 1O2 synthesis, but they are energy- and chemical-intensive. Herein, we present a Janus electrocatalytic membrane realizing ultra-efficient 1O2 production (6.9 mmol per m3 of permeate) and very low energy consumption (13.3 Wh per m3 of permeate) via a fast, flow-through electro-filtration process without the addition of chemical precursors. We confirm that a superoxide-mediated chain reaction, initiated by electrocatalytic oxygen reduction on the cathodic membrane side and subsequently terminated by H2O2 oxidation on the anodic membrane side, is crucial for 1O2 generation. We further demonstrate that the high 1O2 production efficiency is mainly attributable to the enhanced mass and charge transfer imparted by nano- and micro-confinement effects within the porous membrane structure. Our findings highlight a new electro-filtration strategy and an innovative reactive membrane design for synthesizing 1O2 for a broad range of potential applications including environmental remediation.
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Affiliation(s)
- Yumeng Zhao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, 06520-8286, USA
| | - Meng Sun
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, 06520-8286, USA.
| | - Xiaoxiong Wang
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, 06520-8286, USA
| | - Chi Wang
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, 06520-8286, USA
- School of Environment, Northeast Normal University, Changchun, 130024, China
| | - Dongwei Lu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Wen Ma
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, 06520-8286, USA
| | - Sebastian A Kube
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, CT, 06511, USA
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, 06520-8286, USA.
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299
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Carneiro JF, Aquino JM, Silva BF, Silva AJ, Rocha-Filho RC. Comparing the electrochemical degradation of the fluoroquinolone antibiotics norfloxacin and ciprofloxacin using distinct electrolytes and a BDD anode: evolution of main oxidation byproducts and toxicity. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2020; 8:104433. [PMID: 32953450 PMCID: PMC7487200 DOI: 10.1016/j.jece.2020.104433] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/13/2020] [Accepted: 08/25/2020] [Indexed: 05/04/2023]
Abstract
The effects of the supporting electrolytes (SEs) Na2SO4, NaCl, Na2CO3, NaNO3, and Na3PO4 on the anodic oxidation of norfloxacin (NOR) and ciprofloxacin (CIPRO), assessed by the respective degradation kinetics and byproducts and electrolyzed solution antimicrobial activity, are compared. Galvanostatic anodic oxidations were performed in a filter-press flow cell fitted with a boron-doped diamond anode. Removal rates higher than the theoretical one for a process purely controlled by mass transfer were found for all SEs, indicative of contribution by indirect oxidation processes. However, the removal rates for NaCl were about tenfold higher, with the lowest energy consumption per order (EC O) of targeted pollutant removal rate (ca. 0.7 kW h m-3 order-1), a very competitive performance. The TOC removal rates were also affected by the SE, but not as markedly. The antimicrobial activity of the electrolyzed solutions against Escherichia coli showed distinct temporal profiles, depending on the fluoroquinolone and SE. For instance, when Na3PO4 was used, the antimicrobial activity was completely removed for NOR, but none for CIPRO; conversely, when NaCl was used, complete removal was attained only for CIPRO. From LC-MS/MS analyses of Na3PO4 electrolyzed solutions, rupture of the fluoroquinolone ring leading to byproducts with no toxicity against E. coli occurred only for NOR, whereas exactly the opposite occurred for the NaCl solutions. Clearly, the nature of both the SE and the fluoroquinolone influence the oxidation steps of the respective molecule; this was also evidenced by the distinct short-chain carboxylic acids identified in the degradation of NOR and CIPRO.
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Affiliation(s)
- Jussara F Carneiro
- Departamento de Química, Universidade Federal de São Carlos, C.P. 676, 13560-970 São Carlos, SP, Brazil
| | - José M Aquino
- Departamento de Química, Universidade Federal de São Carlos, C.P. 676, 13560-970 São Carlos, SP, Brazil
| | - Bianca F Silva
- Instituto de Química de Araraquara, Departamento de Química Analítica, Universidade Estadual Paulista, 14800-900 Araraquara, SP, Brazil
| | - Adilson J Silva
- Departamento de Engenharia Química, Universidade Federal de São Carlos, C.P. 676, 13560-970 São Carlos, SP, Brazil
| | - Romeu C Rocha-Filho
- Departamento de Química, Universidade Federal de São Carlos, C.P. 676, 13560-970 São Carlos, SP, Brazil
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300
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Hua G, Zhicheng X, Dan Q, Dan W, Hao X, Wei Y, Xiaoliang J. Fabrication and characterization of porous titanium-based PbO 2 electrode through the pulse electrodeposition method: Deposition condition optimization by orthogonal experiment. CHEMOSPHERE 2020; 261:128157. [PMID: 33113652 DOI: 10.1016/j.chemosphere.2020.128157] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/21/2020] [Accepted: 08/25/2020] [Indexed: 06/11/2023]
Abstract
Porous titanium-based PbO2 electrodes were successfully fabricated by pulse electrodeposition method. The primary pulse electrodeposition parameters, including pulse frequency (f), duty ratio (γ), average current density (Ja) and electrodeposition time (t) were considered in this study. An orthogonal experiment was designed based on those four factors and in three levels. SEM images and XRD results suggest that the surface morphology and structure of PbO2 electrodes could be easily changed by varying pulse electrodeposition parameters. Orthogonal analysis reveals that the increase of f and Ja could decrease the average grain size of PbO2 electrodes, which is conducive to create more active sites and promote the generation of hydroxide radicals. The electrochemical degradation of Azophloxine was carried out to evaluate the electrochemical oxidation performance of pulse electrodeposited electrodes. The results indicate that the influences of four factors can be ranked as follow: Ja >γ≈ t > f. The higher f, larger Ja and longer t could facilitate the optimization of the integrated electrochemical degradation performance of prepared PbO2 electrode. The accelerated life time is dominated by Ja and t, coincident with the average weight increase of β-PbO2 layer. The optimal parameters of pulse electrodeposition turn out to be: f = 50 Hz, γ = 30%, Ja = 25 mA cm-2, t = 60 min. Together, the consequences of the experiments give assistance to uncover and roughly conclude the mechanism of pulse electrodeposition.
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Affiliation(s)
- Guo Hua
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China.
| | - Xu Zhicheng
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China.
| | - Qiao Dan
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China.
| | - Wan Dan
- Shaanxi Zhengwei Environmental Testing CO,. LTD, Xi'an, 710049, PR China.
| | - Xu Hao
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China.
| | - Yan Wei
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China.
| | - Jin Xiaoliang
- Shaanxi Zhengwei Environmental Testing CO,. LTD, Xi'an, 710049, PR China.
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