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Cheon S, Zhu S, Gao Y, Li J, Harmon NJ, Zhang W, Francisco JS, Zhu C, Wang H. Neighboring Catalytic Sites Are Essential for Electrochemical Dechlorination of 2-Chlorophenol. J Am Chem Soc 2024; 146:25151-25157. [PMID: 39222363 DOI: 10.1021/jacs.4c08448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
The electrocatalytic reduction process is a promising technology for decomposing chlorinated organic pollutants in water but is limited by the lack of low-cost catalysts that can achieve high activity and selectivity. In studying electrochemical dechlorination of 2-chlorophenol (2-CP) in aqueous media, we find that cobalt phthalocyanine molecules supported on carbon nanotubes (CoPc/CNT), which is a highly effective electrocatalyst for breaking the aliphatic C-Cl bonds in 1,2-dichloroethane (DCA) and trichloroethylene (TCE), are completely inactive for reducing the aromatic C-Cl bond in 2-CP. Detailed mechanistic investigation, including volcano plot correlation between dechlorination rate and atomic hydrogen adsorption energy on various transition metal surfaces, kinetic measurements, in situ Raman spectroscopy, and density functional theory calculations, reveals that the reduction of the aromatic C-Cl bond in 2-CP goes through a hydrodechlorination mechanism featuring a bimolecular reaction between adsorbed atomic hydrogen and 2-CP on the catalyst surface, which requires neighboring catalytic sites, whereas the aliphatic C-Cl bonds in DCA and TCE are cleaved by direct electron transfer from the catalyst, which can occur on isolated single sites. This investigation leads to the discovery of metallic Co as a highly selective and active electrocatalyst for 2-CP dechlorination. This work provides new insights into the fundamental chemistry and catalyst design of electrochemical dechlorination reactions for wastewater treatment.
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Affiliation(s)
- Seonjeong Cheon
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, United States
| | - Shuang Zhu
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100190, China
| | - Yuanzuo Gao
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, United States
| | - Jing Li
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, United States
| | - Nia J Harmon
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, United States
| | - Wanyu Zhang
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, United States
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Joseph S Francisco
- Department of Earth and Environmental Sciences and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Chongqin Zhu
- College of Chemistry, Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, Beijing Normal University, Beijing 100190, China
| | - Hailiang Wang
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, United States
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2
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Li M, Shao L, Liu Z, Liu R, Stoikov II, Khashab NM, Hua B, Huang F. Cis- Trans and Length-Selective Molecular Discrimination of Halogenated Organic Compounds by a Crystalline Hybrid Macrocyclic Arene. ACS APPLIED MATERIALS & INTERFACES 2024; 16:6614-6622. [PMID: 38276951 DOI: 10.1021/acsami.3c15729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
The development of adsorbents with robust molecular discrimination capabilities for halogenated organic compounds (HOCs) holds significant importance due to their potential in adsorptive separation and mitigation of associated health risks. In this study, we report a molecular discrimination behavior based on crystalline hybrid macrocyclic arene H, offering precise capture of cis-trans isomers and length-selective separation of HOCs. The activated H crystals (Hα) demonstrate exceptional discrimination and separation performance by selectively capturing trans-1,2-dichloroethylene (trans-DCE) from cis/trans-isomer mixtures with a high selectivity of 98.8%. Evidenced by single-crystal X-ray diffraction and density functional theory (DFT) calculations, this high adsorption selectivity arises from the formation of more stable complex crystals between H and the preferred guest trans-DCE. Moreover, Hα exhibits the ability to selectively trap size-matched 1,2-dibromoethane (DBE) from mixtures of alkylene dibromides with varying alkane-chain lengths, although their capture and separation are recognized to be difficult as a consequence of low-polarity bonds. The solid-state transformations between guest-free and guest-containing Hα crystals indicate their recyclability, showcasing promising prospects for potential applications.
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Affiliation(s)
- Ming Li
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
| | - Li Shao
- Department of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China
| | - Zhongwen Liu
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
| | - Rui Liu
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
| | - Ivan I Stoikov
- A. M. Butlerov Chemical Institute, Kazan Federal University, Kremlevskaya, 18, 420008 Kazan, Russia
| | - Niveen M Khashab
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Bin Hua
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, P. R. China
| | - Feihe Huang
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311215, P. R. China
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China
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3
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Barros de Souza A, Ali I, van de Goor T, Dewil R, Cabooter D. Comprehensive two-dimensional liquid chromatography with high resolution mass spectrometry to investigate the photoelectrochemical degradation of environmentally relevant pharmaceuticals and their degradation products in water. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 351:120023. [PMID: 38181683 DOI: 10.1016/j.jenvman.2024.120023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/26/2023] [Accepted: 01/02/2024] [Indexed: 01/07/2024]
Abstract
The widespread presence of organic micropollutants in the environment reflects the inability of traditional wastewater treatment plants to remove them. In this context, advanced oxidation processes (AOPs) have emerged as promising quaternary wastewater treatment technologies since they efficiently degrade recalcitrant components by generating highly reactive free radicals. Nonetheless, the chemical characterization of potentially harmful byproducts is essential to avoid the contamination of natural water bodies with hazardous substances. Given the complexity of wastewater matrices, the implementation of comprehensive analytical methodologies is required. In this work, the simultaneous photoelectrochemical degradation of seven environmentally relevant pharmaceuticals and one metabolite from the EU Watch List 2020/1161 was examined in ultrapure water and simulated wastewater, achieving excellent removal efficiencies (overall >95%) after 180 min treatment. The reactor unit was linked to an online LC sample manager, allowing for automated sampling every 15 min and near real-time process monitoring. Online comprehensive two-dimensional liquid chromatography (LC × LC) coupled with high resolution mass spectrometry (HRMS) was subsequently used to tentatively identify degradation products after photoelectrochemical degradation. Two reversed-phase liquid chromatography (RPLC) columns were used: an SB-C18 column operated with 5 mM ammonium formate at pH 5.8 (1A) and methanol (1B) as the mobile phases in the first dimension and an SB-Aq column using acidified water at pH 3.1 (2A) and acetonitrile (2B) as the mobile phases in the second dimension. This resulted in a five-fold increase in peak capacity compared to one-dimensional LC while maintaining the same total analysis time of 50 min. The LC x LC method allowed the tentative identification of 12 venlafaxine, 7 trimethoprim and 10 ciprofloxacin intermediates. Subsequent toxicity predictions suggested that some of these byproducts were potentially harmful. This study presents an effective hybrid technology for the simultaneous removal of pharmaceuticals from contaminated wastewater matrices and demonstrates how multidimensional liquid chromatography techniques can be applied to better understand the degradation mechanisms after the treatment of micropollutants with AOPs.
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Affiliation(s)
- Allisson Barros de Souza
- Agilent Technologies Deutschland, Hewlett-Packard-Strasse 8, 76337, Waldbronn, Germany; KU Leuven, Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis, Herestraat 49, 3000, Leuven, Belgium
| | - Izba Ali
- InOpSys - Mobiele Waterzuivering voor Chemie en Farma, Maanstraat 9b, 2800, Mechelen, Belgium; KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, 2860, Sint-Katelijne-Waver, Belgium
| | - Tom van de Goor
- Agilent Technologies Deutschland, Hewlett-Packard-Strasse 8, 76337, Waldbronn, Germany
| | - Raf Dewil
- KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, 2860, Sint-Katelijne-Waver, Belgium; University of Oxford, Department of Engineering Science, Parks Road, Oxford, OX1 3PJ, United Kingdom
| | - Deirdre Cabooter
- KU Leuven, Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis, Herestraat 49, 3000, Leuven, Belgium.
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Preethi, Shanmugavel SP, Kumar G, N YK, M G, J RB. Recent progress in mineralization of emerging contaminants by advanced oxidation process: A review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 341:122842. [PMID: 37940020 DOI: 10.1016/j.envpol.2023.122842] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/25/2023] [Accepted: 10/29/2023] [Indexed: 11/10/2023]
Abstract
Emerging contaminants are chemicals generated due to the usage of pesticide, endocrine disrupting compounds, pharmaceuticals, and personal care products and are liberated into the environment in trace quantities. The emerging contaminants eventually become a greater menace to living beings owing to their wide range and inhibitory action. To diminish these emerging contaminants from the environment, an Advanced Oxidation Process was considered as an efficient option. The Advanced Oxidation Process is an efficient method for mineralizing fractional or generous contaminants due to the generation of reactive species. The primary aim of this review paper is to provide a thorough knowledge on different Advanced Oxidation Process methods and to assess their mineralization efficacy of emerging contaminants. This study indicates the need for an integrated process for enhancing the treatment efficiency and overcoming the drawbacks of the individual Advanced Oxidation Process. Further, its application concerning technical and economic aspects is reviewed. Until now, most of the studies have been based on lab or pilot scale and do not represent the actual scenario of the emerging contaminant mineralization. Thus, the scaling up of the process was discussed, and the major challenges in large scale implementation were pointed out.
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Affiliation(s)
- Preethi
- Department of Physics, Anna University, Chennai, Tamil Nadu, 600025, India
| | - Surya Prakash Shanmugavel
- Department of Solid Waste Management and Health, Greater Chennai Corporation, Tamil Nadu, 600 003, India
| | - Gopalakrishnan Kumar
- Institute of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, Box 8600 Forus, 4036 Stavanger, Norway; School of Civil and Environmental Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Yogalakshmi K N
- Department of Environmental Science and Technology, Central University of Punjab, Bathinda, Punjab, 151401, India
| | - Gunasekaran M
- Department of Physics, Anna University, Chennai, Tamil Nadu, 600025, India
| | - Rajesh Banu J
- Department of Biotechnology, Central University of Tamil Nadu, Neelakudi, Thiruvarur, 610005, India.
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5
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Simon S, Suresh BK, Anantha-Singh TS. A sequential aerated electrocoagulation and peroxicoagulation process for the treatment of municipal stabilized landfill leachate by iron and graphite electrodes. CHEMOSPHERE 2023; 339:139692. [PMID: 37543228 DOI: 10.1016/j.chemosphere.2023.139692] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/24/2023] [Accepted: 07/30/2023] [Indexed: 08/07/2023]
Abstract
Electrochemical treatment has emerged as a viable technology for the treatment of leachate due to its efficient removal of ammonaical nitrogen and other recalcitrant organics. The main technical issues that prevent its practical deployment are restricted performance of a single electrochemical process and the lengthy tertiary treatment time required to achieve the disposal quality standards. This study demonstrates the performance of electrochemical treatments such as peroxicoagulation (PC) and aerated electrocoagulation (A-EC) separately and also sequentially for the treatment of stabilized leachate. In aerated electro coagulation iron is used as both anode and cathode, whereas in peroxicoagulation, iron is used as anode and graphite as cathode. The area of electrode used for treatments was fixed as 12.5 cm2. The initial concentration of NH4-N, TN, COD, and TOC of the leachate was found to be 480 mg/L, 997 mg/L, 40,200 mg/L, and 9850 mg/L respectively. Removal efficiency of aerated electrocoagulation for NH4-N, TN, COD and TOC were 25.6%, 23.67%, 25.6% and 28.7% respectively, current density of 30 mAcm-2, electrolysis time of 60 min and pH 7.3. Meanwhile for peroxicoagulation, the removal efficiency was found to be 37.2%, 43%, 37.3%, and 45.6% for NH4-N, TN, COD, and TOC respectively, at an current density of 30 mAcm-2, electrolysis time of 120 min and a pH of 3. The sequential aerated electrocoagulation - peroxicoagulation process achieves a maximum removal efficiency of 63%, 68%, 78%, and 75% for NH4-N, total nitrogen, COD, and TOC respectively for a reaction time of 180 min. Removal of NH4-N, total nitrogen, COD and TOC from stabilized landfill leachate with a BOD/COD ratio less than 0.1 was very much effective with the sequential aerated electrocoagulation - peroxicoagulaton treatment. The results also indicate that for the treatment of leachate, a significant synergistic index of 1.22 exists between aerated electrocoagulation and peroxicoagulation.
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Affiliation(s)
- Saji Simon
- Department of Civil Engineering, National Institute of Technology Calicut, India.
| | - Bibin K Suresh
- Department of Civil Engineering, National Institute of Technology Calicut, India.
| | - T S Anantha-Singh
- Department of Civil Engineering, National Institute of Technology Calicut, India.
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6
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Cheng Z, Zhang S, Su H, Zhao H, Su G, Fang M, Wang L. Emerging organic contaminants of liquid crystal monomers: Environmental occurrence, recycling and removal technologies, toxicities and health risks. ECO-ENVIRONMENT & HEALTH 2023; 2:131-141. [PMID: 38074986 PMCID: PMC10702903 DOI: 10.1016/j.eehl.2023.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 07/01/2023] [Accepted: 07/05/2023] [Indexed: 09/19/2024]
Abstract
Liquid crystal monomers (LCMs) are a family of synthetic organic chemicals applied in the liquid crystal displays (LCDs) of various electric and electronic products (e-products). Due to their unique properties (i.e., persistence, bioaccumulative potential, and toxicity) and widespread environmental distributions, LCMs have attracted increasing attention across the world. Recent studies have focused on the source, distribution, fate, and toxicity of LCMs; however, a comprehensive review is scarce. Herein, we highlighted the persistence and bioaccumulation potential of LCMs by reviewing their physical-chemical properties. The naming rules were suggested to standardize the abbreviations regarding LCMs. The sources and occurrences of LCMs in different environmental compartments, including dust, sediment, soil, leachate, air and particulate, human serum, and biota samples, were reviewed. It is concluded that the LCMs in the environment mainly originate from the usage and disassembly of e-products with LCDs. Moreover, the review of the potential recycling and removal technologies regarding LCMs from waste LCD panels suggests that a combination of natural attenuation and physic-chemical remediation should be developed for LCMs remediations in the future. By reviewing the health risks and toxicity of LCMs, it is found that a large gap exists in their toxicity and risk to organisms. The fate and toxicity investigation of LCMs, and further investigations on the effects on the human exposure risks of LCMs to residents, especially to occupational workers, should be considered in the future.
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Affiliation(s)
- Zhipeng Cheng
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Shaohan Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Huijun Su
- Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Industry and Information Technology, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Haoduo Zhao
- Department of Environmental Science and Engineering, The University of North Carolina at Chapel Hill, 135 Dauer Drive, Chapel Hill, NC 27599, USA
| | - Guanyong Su
- Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Industry and Information Technology, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Mingliang Fang
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
| | - Lei Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
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7
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Tran HD, Nguyen DQ, Do PT, Tran UNP. Kinetics of photocatalytic degradation of organic compounds: a mini-review and new approach. RSC Adv 2023; 13:16915-16925. [PMID: 37283872 PMCID: PMC10241197 DOI: 10.1039/d3ra01970e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Accepted: 05/24/2023] [Indexed: 06/08/2023] Open
Abstract
Organic compounds are widespread pollutants in wastewater, causing significant risks for living organisms. In terms of advanced oxidation processes, photocatalysis is known as an effective technology for the oxidation and mineralization of numerous non-biodegradable organic contaminants. The underlying mechanisms of photocatalytic degradation can be explored through kinetic studies. In previous works, Langmuir-Hinshelwood and pseudo-first-order models were commonly applied to fit batch-mode experimental data, revealing critical kinetic parameters. However, the application or combination conditions of these models were inconsistent or ignored. This paper briefly reviews kinetic models and various factors influencing the kinetics of photocatalytic degradation. In this review, kinetic models are also systemized by a new approach to establish a general concept of a kinetic model for the photocatalytic degradation of organic compounds in an aqueous solution.
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Affiliation(s)
- Hai D Tran
- Faculty of Environment, Ho Chi Minh University of Natural Resources and Environment Ho Chi Minh City Vietnam
| | - Dinh Quan Nguyen
- Laboratory of Biofuel and Biomass Research, Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet, District 10 Ho Chi Minh City Vietnam
- Vietnam National University Ho Chi Minh City Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
| | - Phuong T Do
- Office of R&D and External Relations, Ho Chi Minh University of Natural Resources and Environment Ho Chi Minh City 70000 Vietnam
| | - Uyen N P Tran
- Faculty of Engineering and Technology, Van Hien University Ho Chi Minh City Vietnam
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8
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Wang L, Wang H, Deng J, Liu J, Wu Y, Huang S, Ma X, Li X, Dietrich AM. Enhanced dehalogenation of brominated DBPs by catalyzed electrolysis using Vitamin B 12 modified electrodes: Kinetics, mechanisms, and mass balances. JOURNAL OF HAZARDOUS MATERIALS 2023; 449:131052. [PMID: 36827722 DOI: 10.1016/j.jhazmat.2023.131052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 02/16/2023] [Accepted: 02/19/2023] [Indexed: 06/18/2023]
Abstract
Vitamin B12 (VB12) modified electrodes were prepared for the electrocatalytic reductive debromination of tribromoacetic acid (TBAA). Under galvanostatic conditions set as 5 mmol/L VB12 loading, 20 mmol/L Na2SO4 as electrolyte, 10.0 mA/cm2 current density, pH 3, and 298 K, the degradation efficiency of 200 μg/L TBAA at the VB12 modified electrode could reach 99.9 % after 6 h. The debromination of TBAA followed the first-order kinetic model. The masses of carbon and bromine elements were conserved before and after the reaction, together with the qualitative analysis of the degradation products showed the likely degradation pathways as TBAA→dibromoacetic acid (DBAA)→monobromoacetic acid (MBAA)→acetic acid (AA). ESR detection and quenching experiments confirmed the role of atomic H* in TBAA debromination. In-situ Raman spectroscopy showed that the Co-Br bond was strongly enriched to the electrode surface, accelerating the electron transfer. The H2O dissociation performance and transition states searching catalyzed by VB12 were calculated by Density Functional Theory (DFT) and proved that the composite electrode can effectively promote atomic H* generation. Material characterization and electrochemical performance tests showed that the VB12 modified electrode had excellent stability and atomic H* catalytic activity. The electrocatalytic debromination of TBAA at VB12 modified electrodes mainly involves two mechanisms, direct reduction by electron transfer and indirect reduction by the strongly reducing atom H*. The results provide an efficient way to achieve safe removal of brominated DBPs from drinking water after chlorination and before human consumption.
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Affiliation(s)
- Lei Wang
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Hong Wang
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jing Deng
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Junping Liu
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yifei Wu
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Sinong Huang
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiaoyan Ma
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Xueyan Li
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Andrea M Dietrich
- Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
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9
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Guo Y, Li Y, Wang Z. Electrocatalytic hydro-dehalogenation of halogenated organic pollutants from wastewater: A critical review. WATER RESEARCH 2023; 234:119810. [PMID: 36889094 DOI: 10.1016/j.watres.2023.119810] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 02/06/2023] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
Halogenated organic pollutants are often found in wastewater effluent although it has been usually treated by advanced oxidation processes. Atomic hydrogen (H*)-mediated electrocatalytic dehalogenation, with an outperformed performance for breaking the strong carbon-halogen bonds, is of increasing significance for the efficient removal of halogenated organic compounds from water and wastewater. This review consolidates the recent advances in the electrocatalytic hydro-dehalogenation of toxic halogenated organic pollutants from contaminated water. The effect of the molecular structure (e.g., the number and type of halogens, electron-donating or electron-withdrawing groups) on dehalogenation reactivity is firstly predicted, revealing the nucleophilic properties of the existing halogenated organic pollutants. The specific contribution of the direct electron transfer and atomic hydrogen (H*)-mediated indirect electron transfer to dehalogenation efficiency has been established, aiming to better understand the dehalogenation mechanisms. The analyses of entropy and enthalpy illustrate that low pH has a lower energy barrier than that of high pH, facilitating the transformation from proton to H*. Furthermore, the quantitative relationship between dehalogenation efficiency and energy consumption shows an exponential increase of energy consumption for dehalogenation efficiency increasing from 90% to 100%. Lastly, challenges and perspectives are discussed for efficient dehalogenation and practical applications.
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Affiliation(s)
- Yun Guo
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, Tongji Advanced Membrane Technology Center, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Yang Li
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, Tongji Advanced Membrane Technology Center, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Zhiwei Wang
- State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, Tongji Advanced Membrane Technology Center, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
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10
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Xiang F, Jin B. Study on electrochemical reduction mechanism of p-nitrophenylacetic acid prepared by electrocarboxylation. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
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11
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Zhang Z, Qiao D, Li X, Jing X, Xu H, Yan W. Constant current-exponential attenuation mode: A non-traditional power supply mode for electrocatalytic oxidation. CHEMOSPHERE 2023; 319:137961. [PMID: 36738940 DOI: 10.1016/j.chemosphere.2023.137961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/19/2022] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Low average current efficiency (ACE) and high energy consumption (EC) have seriously hindered the industrial development of electrocatalytic oxidation (ECO) technology. Timely adjustment of the current output according to the attenuation law of the organic pollutants concentration during the reaction process can help to solve the low electrical energy utilization problem at source. In this study, a non-traditional power supply mode with "constant current-exponential attenuation" (Mode CC-EA) was proposed and applied to intermittent ECO systems. The current is first output in a constant state and then attenuated exponentially according to the decreasing law of pollutants concentration, enabling efficient use of electrons at all stages of the reaction, resulting in increased degradation rates and ACE, and reduced EC. Acidic red G (ARG) was used as the target pollutant and the degradation effects of the traditional constant current mode (Mode CC), the direct exponential attenuation mode (Mode EA) and the Mode CC-EA were compared with different evaluation parameters. The results showed that the optimized Mode EA (n4) and Mode CC-EA (70-n11) degraded ARG with an ACE of 5.28 and 6.09%, respectively, which were 1.26 and 1.45 times higher than Mode CC (4.2%). At the same time, the EC were 0.36 and 0.27 kWh gCOD-1, respectively, which were 12.2 and 34.2% lower than Mode CC (0.41 kWh gCOD-1). The parameters of Mode CC-EA were further optimized and used for the degradation of three typical dye wastewaters, crystal violet (CV), methylene blue (MB) and methyl orange (MO), to investigate their general applicability. The results showed that the optimized Mode CC-EA achieved higher decolorization rates, chemical oxygen demand (COD) and total organic carbon (TOC) removal rates for the four wastewaters, including ARG, than Mode CC within 120 min for the same total input charge. The ACE of Mode CC-EA was on average 1.3 times higher than that of Mode CC, while the EC was on average 25.3% lower. Mode CC-EA achieves efficient use of electrical energy while ensuring the catalytic effect, which is of great application for the efficient treatment of dye wastewater and significance for the industrial development of ECO technology.
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Affiliation(s)
- Zekun Zhang
- Department of Environmental Science Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China
| | - Dan Qiao
- Department of Environmental Science Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China
| | - Xinyuan Li
- Department of Environmental Science Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China
| | - Xiaosheng Jing
- Department of Environmental Science Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China
| | - Hao Xu
- Department of Environmental Science Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China; Research Institute of Xi'an Jiaotong University, Zhejiang, Hangzhou, 311200, PR China.
| | - Wei Yan
- Department of Environmental Science Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, PR China; Research Institute of Xi'an Jiaotong University, Zhejiang, Hangzhou, 311200, PR China
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12
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Niu SM, Zhang Q, Sangeetha T, Chen L, Liu LY, Wu P, Zhang C, Yan WM, Liu H, Cui MH, Wang AJ. Evaluation of the effect of biofilm formation on the reductive transformation of triclosan in cathode-modified electrolytic systems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 865:161308. [PMID: 36596419 DOI: 10.1016/j.scitotenv.2022.161308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/06/2022] [Accepted: 12/27/2022] [Indexed: 06/17/2023]
Abstract
The performance of electrochemical reduction is often enhanced by electrode modification techniques. However, there is a risk of microbial colonization on the electrode surface to form biofilms in the treatment of actual wastewater with modified electrodes. In this work, the effects of biofilm formation on modified electrodes with reduced graphene oxide (rGO), platinum/carbon (Pt/C), and carbon nanotube (CNT) were investigated in triclosan (TCS) degradation. With biofilm formation, the TCS degradation efficiencies of carbon cloth (CC), rGO@CC, Pt/C@CC, and CNT@CC decayed to 54.53 %, 59.77 %, 69.19 %, and 53.97 %, respectively, compared to the raw electrodes. Confocal laser scanning microscopy and microbial community analysis revealed that the difference in biofilm thickness and activity were the major influencing factors on the discrepant TCS degradation rather than the microbial community structure. The electrochemical performance tests showed that the biofilm formation increased the ohmic resistance by an order of magnitude in rGO@CC, Pt/C@CC, and CNT@CC, and the charge transfer resistance was increased by 2.45, 3.78, and 7.75 times, respectively. The dechlorination and hydrolysis governed the TCS degradation pathway in all electrolysis systems, and the toxicity of electrochemical reductive products was significantly decreased according to the Toxicity Estimation Software Tool analysis. This study presented a systematic assessment of the biofilm formation on modified electrodes in TCS reduction, and the undisputed experimental outcomes were obtained to enrich the knowledge of implementing modified electrodes for practical applications.
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Affiliation(s)
- Shi-Ming Niu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China
| | - Qian Zhang
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; Tai'an Water Conservancy Bureau, Tai'an 271299, PR China
| | - Thangavel Sangeetha
- Department of Energy and Refrigerating Air-Conditioning Engineering and Research Center of Energy Conservation for New Generation of Residential, Commercial, and Industrial Sectors, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Lei Chen
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China
| | - Lan-Ying Liu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China
| | - Ping Wu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China
| | - Chao Zhang
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China
| | - Wei-Mon Yan
- Department of Energy and Refrigerating Air-Conditioning Engineering and Research Center of Energy Conservation for New Generation of Residential, Commercial, and Industrial Sectors, National Taipei University of Technology, Taipei 10608, Taiwan
| | - He Liu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Min-Hua Cui
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, PR China.
| | - Ai-Jie Wang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China; School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, PR China
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13
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Zhang W, Xu Y, Mu X, Li S, Liu X, Lei Z. Research Progress of Polysaccharide-Based Natural Polymer Hydrogels in Water Purification. Gels 2023; 9:gels9030249. [PMID: 36975698 PMCID: PMC10048097 DOI: 10.3390/gels9030249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/13/2023] [Accepted: 03/17/2023] [Indexed: 03/29/2023] Open
Abstract
The pollution and scarcity of freshwater resources are global problems that have a significant influence on human life. It is very important to remove harmful substances in the water to realize the recycling of water resources. Hydrogels have recently attracted attention due to their special three-dimensional network structure, large surface area, and pores, which show great potential for the removal of pollutants in water. In their preparation, natural polymers are one of the preferred materials because of their wide availability, low cost, and easy thermal degradation. However, when it is directly used for adsorption, its performance is unsatisfactory, so it usually needs to be modified in the preparation process. This paper reviews the modification and adsorption properties of polysaccharide-based natural polymer hydrogels, such as cellulose, chitosan, starch, and sodium alginate, and discusses the effects of their types and structures on performance and recent technological advances.
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Affiliation(s)
- Wenxu Zhang
- Key Laboratory of Eco-Functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
- Key Laboratory of Eco-Environmental Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
| | - Yan Xu
- Key Laboratory of Eco-Functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
- Key Laboratory of Eco-Environmental Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
| | - Xuyang Mu
- Key Laboratory of Eco-Functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
- Key Laboratory of Eco-Environmental Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
| | - Sijie Li
- Key Laboratory of Eco-Functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
- Key Laboratory of Eco-Environmental Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
| | - Xiaoming Liu
- Key Laboratory of Eco-Functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
- Key Laboratory of Eco-Environmental Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
| | - Ziqiang Lei
- Key Laboratory of Eco-Functional Polymer Materials of the Ministry of Education, Northwest Normal University, Lanzhou 730070, China
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
- Key Laboratory of Eco-Environmental Polymer Materials of Gansu Province, Northwest Normal University, Lanzhou 730070, China
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14
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Zhu X, Liao C, Song D, Yan X, Wan Y, Sun H, Wang X. Glucose facilitates the acclimation of organohalide-respiring bacteria. JOURNAL OF HAZARDOUS MATERIALS 2023; 444:130421. [PMID: 36427483 DOI: 10.1016/j.jhazmat.2022.130421] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/29/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
Organohalide respiring bacteria (OHRB) are the mainstay for bioremediation of organohalide contaminated sites. Enrichment screening of OHRB is prerequisite for the development of high performance dehalogenating bacterial agents. Herein, different domestication strategies were formulated for the main factors (nutrients and inocula) affecting the enrichment of OHRB, and the dehalogenation effect was verified with 2-chlorophenol and per/polyfluoroalkyl substances. The nutrients had a greater impact on the dehalogenation of the systems relative to the inocula, where the combination of glucose and anaerobic sludge (Glu-AS) had a faster degradation rate (26 ± 2.5 µmol L-1 d-1) and more complete dechlorination effectiveness. Meanwhile, the dehalogenation results for perfluorooctanoic acid and trifluoroacetic acid showed the biological defluorination was closely related to the position of fluoride. Further, the microbial community structure profiled the resource competition, metabolic cross-feeding and nutrient dynamic exchange among fermenting bacteria, OHRB and methanogenic bacteria under different domestication strategies as endogenous factors affecting the dehalogenation performance, and speculated a hypothetical model for the interaction of different functional bacteria. Our research contributed guidelines and references for the development of efficient dehalogenating bacterial agents, and provided scientific theoretical and technical support for promoting the maximum efficiency of bioremediation of organohalogenated sites.
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Affiliation(s)
- Xuemei Zhu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China
| | - Chengmei Liao
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China.
| | - Dongbao Song
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China
| | - Xuejun Yan
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China
| | - Yuxuan Wan
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China
| | - Hongwen Sun
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China
| | - Xin Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, China.
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15
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Beck AD, Haufe S, Waldvogel SR. General Concepts and Recent Advances in the Electrochemical Transformation of Chloro‐ and Hydrosilanes. ChemElectroChem 2023. [DOI: 10.1002/celc.202201149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Alexander D. Beck
- Wacker Chemie AG Consortium für elektrochemische Industrie Zielstattstraße 20 81379 München Germany
- Department Chemie Johannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Stefan Haufe
- Wacker Chemie AG Consortium für elektrochemische Industrie Zielstattstraße 20 81379 München Germany
| | - Siegfried R. Waldvogel
- Department Chemie Johannes Gutenberg-Universität Mainz Duesbergweg 10–14 55128 Mainz Germany
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16
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Wang Y, Du L, Guan H, Hao L, Hu Y, Du H. Changing the reaction pathway in TiO 2 photocatalytic dehalogenation of halogenated aromatic pollutants by surface hydroxyl regulation. JOURNAL OF HAZARDOUS MATERIALS 2023; 442:130088. [PMID: 36206712 DOI: 10.1016/j.jhazmat.2022.130088] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 09/18/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Understanding the photocatalytic reductive dehalogenation mechanism of halogenated aromatic pollutants is of great research value. However, the proton source in the photocatalytic dehalogenation process of representative halogenated aromatic pollutants by TiO2 is not clear. In this study, the TiO2 surface was modified by hydrochloric acid, sodium hydroxide, and sodium fluoride to obtain TiO2 samples with different hydroxyl groups. It was found that the hydroxyl groups on the surface of TiO2 affects the sequence of proton and electron transfer in dehalogenation. The abundance of hydroxyl groups on the surface of TiO2 can accelerate the reductive dehalogenation process of representative halogenated aromatic pollutants. The kinetic solvent isotope effect was used to study the proton-coupled electron transfer process in the reaction. It shows that the enriching of protons on TiO2 bridging oxygen (bridging hydroxyl groups) is conducive to the rapid step of protonation of the reactant, and subsequent proton and electron transfer. On the contrary, the bridging hydroxyl groups can be removed by reacting with strongly basic sodium hydroxide and sodium ions can occupy the bridging oxygen. The substitution of bridging oxygen by fluorine ions can also lead to the destruction of bridge hydroxyl groups. Significantly, the absence of bridging hydroxyl groups on titanium dioxide will lead to the dehalogenation of representative halogenated aromatic pollutants initiated by electron transfer. This study is helpful to understand dehalogenation reaction paths catalyzed by TiO2.
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Affiliation(s)
- Yuanyuan Wang
- College of Materials Engineering, Jinling Institute of Technology, Nanjing 211169, PR China.
| | - Lang Du
- College of Materials Engineering, Jinling Institute of Technology, Nanjing 211169, PR China
| | - Hangmin Guan
- College of Materials Engineering, Jinling Institute of Technology, Nanjing 211169, PR China
| | - Lingyun Hao
- College of Materials Engineering, Jinling Institute of Technology, Nanjing 211169, PR China
| | - Yingfei Hu
- College of Materials Engineering, Jinling Institute of Technology, Nanjing 211169, PR China.
| | - Hongxiu Du
- College of Materials Engineering, Jinling Institute of Technology, Nanjing 211169, PR China
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17
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Belibagli P, Isik Z, Özdemir S, Gonca S, Dizge N, Awasthi MK, Balakrishnan D. An integrated process for wet scrubber wastewater treatment using electrooxidation and pressure-driven membrane filtration. CHEMOSPHERE 2022; 308:136216. [PMID: 36075362 DOI: 10.1016/j.chemosphere.2022.136216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 08/09/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
In this study, the electrooxidation (EO) and membrane processes were used for chemical oxygen demand (COD) and total phenol (TPh) removal from wet scrubber wastewater (WSW). EO experiments were carried out using Al, Fe, SS, Ti, graphite, active carbon cloth electrodes and Box-Behnken design were used for optimization of maximum COD and TPh removal efficiency. Moreover, membrane filtration experiments were conducted to EO process using nanofiltration (NF270) and reverse osmosis membranes (SW30 and BW30). The maximum COD (55%) and TPh (50%) removal efficiency was achieved at pH of 8, 150 A/m2 current density, and 180 min reaction time in EO process. Membrane filtration results showed that COD removal efficiency was the highest for SW30 membrane (95.18%) compared to BW30 (91.15%) and NF270 (80.11%) membranes. TPh removal efficiency in the NF270, BW30, and SW30 membranes was 27.08%, 96.06%, and 98.02%, respectively. The effect of microbial cell viability of the raw and treated wet scrubber wastewater after electrooxidation and membrane filtration was also investigated using E. coli. In addition to these, biofilm inhibition of the raw wet scrubber wastewater and the treated WSW after EO and membrane filtration were tested and the highest biofilm inhibition was found as 76.43% and 72.58% against S. aureus and P. aeruginosa, respectively, in 1/20 diluted samples of the raw WSW. This study suggests that the integrated process using EO and pressure-driven membrane methods are an efficient strategy for COD and TPh removal from WSW.
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Affiliation(s)
- Pinar Belibagli
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey
| | - Zelal Isik
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey
| | - Sadin Özdemir
- Food Processing Programme, Technical Science Vocational School, Mersin University, Mersin, 33343, Turkey
| | - Serpil Gonca
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, University of Mersin, Mersin, 33343, Turkey
| | - Nadir Dizge
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey.
| | - Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Shaanxi, 712100, China
| | - Deepanraj Balakrishnan
- College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar, 31952, Saudi Arabia.
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18
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Dong J, Li G, Gao J, Zhang H, Bi S, Liu S, Liao C, Jiang G. Catalytic degradation of brominated flame retardants in the environment: New techniques and research highlights. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 848:157695. [PMID: 35908699 DOI: 10.1016/j.scitotenv.2022.157695] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/09/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Due to the extensive commercial use of brominated flame retardants (BFRs), human beings are chronically exposed to BFRs, causing great harms to human health, which imposes urgent demands to degrade them in the environment. Among various degradation techniques, catalytic degradation has been proven to be outstanding because of its rapidness and effectiveness. Therefore, much attention has been given to catalytic degradation, especially the extensively studied photocatalytic degradation and nanocatalytic reduction techniques. Recently, some novel advanced catalytic techniques have been developed and show excellent catalytic degradation efficiency for BFRs, including natural substances catalytic degradation, new Fenton catalytic degradation, new chemical reagent catalytic degradation, new material catalytic degradation, electrocatalytic degradation, plasma catalytic degradation, and composite catalytic degradation systems. In addition to the common features of traditional catalytic techniques, these novel techniques possess their own specific advantages in various aspects. Therefore, this review summarized the degradation mechanism of BFRs by the above new catalytic degradation methods under the laboratory conditions, simulated real environment, and real environment conditions, and further evaluated their advantages and disadvantages, aiming to provide some research ideas for the catalytic degradation of BFRs in the environment in the future. We suggested that more attention should focus on features of novel catalytic techniques, including eco-friendliness, cost-effectiveness, and pragmatic usefulness.
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Affiliation(s)
- Jingcun Dong
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Guoliang Li
- College of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Jia Gao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - He Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Shihao Bi
- Neck-Shoulder and Lumbocrural Pain Hospital of Shandong First Medical University, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong 250062, China
| | - Sijin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Chunyang Liao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of the Chinese Academy of Sciences, Beijing 100049, China.
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of the Chinese Academy of Sciences, Beijing 100049, China
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19
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Ma W, Liu Y, Zhang S. Electrochemical reduction of Cr (VI) using a palladium/graphene modified stainless steel electrode. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:2184-2196. [PMID: 36378174 DOI: 10.2166/wst.2022.348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In this study, a palladium/graphene modified stainless steel electrode was successfully prepared and applied in an electrochemical reduction device to remove Cr (VI) from the wastewater. Pd was modified onto the electrode mainly via interacting with the carboxyl group of graphene. The Cr (VI) removal efficiency was up to 99.70 ± 0.00% under the optimal condition (Pd content proportion of 3%, electrode potential of -0.9 V, pH = 2 and electrolyte concentration of 6 g/L). It was found that Cr (VI) was removed via the following processes: (1) direct electrochemical reduction by accepting electrons, (2) indirect electrochemical reduction by H2O2 that was generated from H2 in the presence of Pd, (3) adsorption through hydrogen bond, and (4) chemical reduction through alkoxy groups donating electrons. The indirect electrochemical reduction considerably promoted the Cr (VI) removal while a small amount of Cr (VI) was removed via adsorption and chemical reduction. The method could not only be used as a pretreatment technology to solve the problem of excessive Cr (VI) concentration of industrial wastewater, but also could provide reference for the electrochemical reduction of similar metal ions.
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Affiliation(s)
- Wenqing Ma
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China E-mail:
| | - Yubo Liu
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China E-mail:
| | - Shaohui Zhang
- School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, PR China E-mail: ; Hubei Key Laboratory of Fuel Cell, Wuhan University of Technology, Wuhan 430070, PR China
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20
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Sun Y, Sun S, Wu T, Qu X, Zheng S. Highly effective electrocatalytic reduction of N-nitrosodimethylamine on Ru/CNT catalyst. CHEMOSPHERE 2022; 305:135414. [PMID: 35728667 DOI: 10.1016/j.chemosphere.2022.135414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 06/07/2022] [Accepted: 06/16/2022] [Indexed: 06/15/2023]
Abstract
N-Nitrosodimethylamine (NDMA) is a commonly identified carcinogenic and genotoxic pollutant in water. In this study, we prepared Ru catalysts supported on carbon nanotube (Ru/CNT) and studied the electrocatalytic reduction of N-nitrosamines on Ru/CNT electrode in a three-electrode system. The results show that Ru-based catalyst exhibits a high activity of 793.3 μmol L-1 gCat-1 h-1 for electrochemical reduction of NDMA. Reaction mechanism study discloses that the electrocatalytic reduction of NDMA is accomplished by both direct electron reduction and atomic H* mediated indirect reduction pathways. Further product analysis indicates that NDMA is finally reduced to dimethylamine (DMA) and ammonia. The reduction efficiency of NDMA strongly relies on cathode potential, initial NDMA concentration and solution pH. To verify the universality of Ru/CNT electrode, electrocatalytic reduction of three dialkyl N-nitrosamines with different alkyl groups was performed and Ru catalyst has high catalytic activities for the three N-nitrosamines, while the catalytic efficiency differs with their structures. Simultaneous electrochemical reduction of the three N-nitrosamines indicates that the reduction rates of N-nitrosamines follow the same order in the multiple-component system as that in the single-component system. Catalyst recycling results demonstrate that after 5 consecutive recycling runs Ru/CNT electrode remains almost identical catalytic activity to the fresh catalyst, manifesting the high catalytic stability of Ru/CNT electrode.
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Affiliation(s)
- Yuhan Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Su Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Tianyi Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Xiaolei Qu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Shourong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China.
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21
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Bonechi M, Giurlani W, Innocenti M, Pasini D, Mishra S, Giovanardi R, Fontanesi C. On the Dynamics of the Carbon-Bromine Bond Dissociation in the 1-Bromo-2-Methylnaphthalene Radical Anion. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27144539. [PMID: 35889412 PMCID: PMC9319363 DOI: 10.3390/molecules27144539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/08/2022] [Accepted: 07/12/2022] [Indexed: 11/16/2022]
Abstract
This paper studies the mechanism of electrochemically induced carbon-bromine dissociation in 1-Br-2-methylnaphalene in the reduction regime. In particular, the bond dissociation of the relevant radical anion is disassembled at a molecular level, exploiting quantum mechanical calculations including steady-state, equilibrium and dissociation dynamics via dynamic reaction coordinate (DRC) calculations. DRC is a molecular-dynamic-based calculation relying on an ab initio potential surface. This is to achieve a detailed picture of the dissociation process in an elementary molecular detail. From a thermodynamic point of view, all the reaction paths examined are energetically feasible. The obtained results suggest that the carbon halogen bond dissociates following the first electron uptake follow a stepwise mechanism. Indeed, the formation of the bromide anion and an organic radical occurs. The latter reacts to form a binaphthalene intrinsically chiral dimer. This paper is respectfully dedicated to Professors Anny Jutand and Christian Amatore for their outstanding contribution in the field of electrochemical catalysis and electrosynthesis.
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Affiliation(s)
- Marco Bonechi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy; (M.B.); (W.G.)
| | - Walter Giurlani
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy; (M.B.); (W.G.)
| | - Massimo Innocenti
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy; (M.B.); (W.G.)
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti 9, 50121 Firenze, Italy
- Center for Colloid and Surface Science (CSGI), Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
- Correspondence: (M.I.); (C.F.)
| | - Dario Pasini
- Department of Chemistry, University of Pavia, Via Taramelli 10, 27100 Pavia, Italy;
| | - Suryakant Mishra
- Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;
| | - Roberto Giovanardi
- Department of Engineering “Enzo Ferrari” (DIEF), University of Modena, Via Vivarelli 10, 41125 Modena, Italy;
| | - Claudio Fontanesi
- National Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti 9, 50121 Firenze, Italy
- Department of Engineering “Enzo Ferrari” (DIEF), University of Modena, Via Vivarelli 10, 41125 Modena, Italy;
- Correspondence: (M.I.); (C.F.)
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22
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Nabgan W, Saeed M, Jalil AA, Nabgan B, Gambo Y, Ali MW, Ikram M, Fauzi AA, Owgi AHK, Hussain I, Thahe AA, Hu X, Hassan NS, Sherryna A, Kadier A, Mohamud MY. A state of the art review on electrochemical technique for the remediation of pharmaceuticals containing wastewater. ENVIRONMENTAL RESEARCH 2022; 210:112975. [PMID: 35196501 DOI: 10.1016/j.envres.2022.112975] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/29/2022] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
Pharmaceutical wastewater is a frequent kind of wastewater with high quantities of organic pollutants, although little research has been done in the area. Pharmaceutical wastewaters containing antibiotics and high salinity may impair traditional biological treatment, resulting in the propagation of antibiotic resistance genes. The potential for advanced oxidation processes (AOPs) to break down hazardous substances instead of present techniques that essentially transfer contaminants from wastewater to sludge, a membrane filter, or an adsorbent has attracted interest. Among a variety of AOPs, electrochemical systems are a feasible choice for treating pharmaceutical wastewater. Many electrochemical approaches exist now to remediate rivers polluted by refractory organic contaminants, like pharmaceutical micro-pollutants, which have become a severe environmental problem. The first part of this investigation provides the bibliometric analysis of the title search from 1970 to 2021 for keywords such as wastewater and electrochemical. We have provided information on relations between keywords, countries, and journals based on three fields plot, inter-country co-authorship network analysis, and co-occurrence network visualization. The second part introduces electrochemical water treatment approaches customized to these very distinct discarded flows, containing how processes, electrode materials, and operating conditions influence the results (with selective highlighting cathode reduction and anodic oxidation). This section looks at how electrochemistry may be utilized with typical treatment approaches to improve the integrated system's overall efficiency. We discuss how electrochemical cells might be beneficial and what compromises to consider when putting them into practice. We wrap up our analysis with a discussion of known technical obstacles and suggestions for further research.
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Affiliation(s)
- Walid Nabgan
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
| | - M Saeed
- Department of Chemistry, Government College University Faisalabad, Faisalabad, 38000, Pakistan
| | - A A Jalil
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
| | - B Nabgan
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Y Gambo
- Chemical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - M W Ali
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - M Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, 54000, Punjab, Pakistan.
| | - A A Fauzi
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - A H K Owgi
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - I Hussain
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, 321004, People's Republic of China
| | - Asad A Thahe
- Department of X- Ray and Sonar, Faculty Of Medical Technology, AL-Kitab University, Iraq
| | - Xun Hu
- School of Material Science and Engineering, University of Jinan, Jinan, 250022, PR China
| | - N S Hassan
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - A Sherryna
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Abudukeremu Kadier
- Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences (CAS), Urumqi, 830011, China.
| | - M Y Mohamud
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
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23
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Wu S, Wang Z, Wan L, Luo C, Baig SA, Xu X. Electrocatalytic hydrodechlorination of clofibric acid (CA) using Pd/Ni foam electrodes: The effects of Ni(OH)2 and complexing agents on electrode preparation. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Wu JC, Chuang YH, Liou SYH, Li Q, Hou CH. In situ engineering of highly conductive TiO 2/carbon heterostructure fibers for enhanced electrocatalytic degradation of water pollutants. JOURNAL OF HAZARDOUS MATERIALS 2022; 429:128328. [PMID: 35114455 DOI: 10.1016/j.jhazmat.2022.128328] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 12/27/2021] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
Rational design of nanocomposite electrode materials with high conductivity, activity, and mechanical strength is critical in electrocatalysis. Herein, freestanding, flexible heteronanocomposites were fabricated in situ by carbonizing electrospun fibers with TiO2 nanoparticles on the surface for electrocatalytic degradation of water pollutants. The carbonization temperature was observed as a dominant parameter affecting the characteristics of the electrodes. As the carbonization temperature increased to 1000 °C, the conductivity of the electrode was significantly enhanced due to the high degree of graphitization (ID/IG ratio 1.10) and the dominant rutile phase. Additionally, the formation of TiO2 protrusions and the C-Ti heterostructure were observed at 1000 °C, which contributed to increasing the electrocatalytic activity. When 1.5 V (vs. Ag/AgCl) was employed, electrocatalytic experiments using the electrode achieved 90% degradation of crystal violet and 10.9-87.5% for an array of micropollutants. The electrical energy-per-order (EEO) for the removal of crystal violet was 0.7 kWh/m3/order, indicative of low-energy requirement. The efficient electrocatalytic activity can be ascribed to the fast electron transfer and the strong ability to generate hydroxyl radicals. Our findings expand efforts for the design of highly conductive heteronanocomposites in a facile in situ approach, providing a promising perspective for the energy-efficient electrocatalytic degradation of water pollutants.
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Affiliation(s)
- Jhen-Cih Wu
- Graduate Institute of Environmental Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Yi-Hsueh Chuang
- Institute of Environmental Engineering, National Yang Ming Chiao Tung University, 1001 University Road, East District, Hsinchu 30010, Taiwan
| | - Sofia Ya Hsuan Liou
- Department of Geosciences, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan; Research Center for Future Earth, National Taiwan University, No. 1, Section 4. Roosevelt Rd., Taipei 10617, Taiwan
| | - Qilin Li
- Department of Civil and Environmental Engineering, Rice University, 6100 Main Street MS 519, Houston, TX 77005, USA; Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, 6100 Main Street MS 6398, Houston, TX 77005, USA
| | - Chia-Hung Hou
- Graduate Institute of Environmental Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan; Research Center for Future Earth, National Taiwan University, No. 1, Section 4. Roosevelt Rd., Taipei 10617, Taiwan.
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25
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Sharma A, Vázquez LAB, Hernández EOM, Becerril MYM, Oza G, Ahmed SSSJ, Ramalingam S, Iqbal HMN. Green remediation potential of immobilized oxidoreductases to treat halo-organic pollutants persist in wastewater and soil matrices - A way forward. CHEMOSPHERE 2022; 290:133305. [PMID: 34929272 DOI: 10.1016/j.chemosphere.2021.133305] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/11/2021] [Accepted: 12/12/2021] [Indexed: 02/08/2023]
Abstract
The alarming presence of hazardous halo-organic pollutants in wastewater and soils generated by industrial growth, pharmaceutical and agricultural activities is a major environmental concern that has drawn the attention of scientists. Unfortunately, the application of conventional technologies within hazardous materials remediation processes has radically failed due to their high cost and ineffectiveness. Consequently, the design of innovative and sustainable techniques to remove halo-organic contaminants from wastewater and soils is crucial. Altogether, these aspects have led to the search for safe and efficient alternatives for the treatment of contaminated matrices. In fact, over the last decades, the efficacy of immobilized oxidoreductases has been explored to achieve the removal of halo-organic pollutants from diverse tainted media. Several reports have indicated that these enzymatic constructs possess unique properties, such as high removal rates, improved stability, and excellent reusability, making them promising candidates for green remediation processes. Hence, in this current review, we present an insight of green remediation approaches based on the use of immobilized constructs of phenoloxidases (e.g., laccase and tyrosinase) and peroxidases (e.g., horseradish peroxidase, chloroperoxidase, and manganese peroxidase) for sustainable decontamination of wastewater and soil matrices from halo-organic pollutants, including 2,4-dichlorophenol, 4-chlorophenol, diclofenac, 2-chlorophenol, 2,4,6-trichlorophenol, among others.
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Affiliation(s)
- Ashutosh Sharma
- Tecnologico de Monterrey, School of Engineering and Sciences, Centre of Bioengineering, Campus Queretaro, 76130, Mexico.
| | - Luis Alberto Bravo Vázquez
- Tecnologico de Monterrey, School of Engineering and Sciences, Centre of Bioengineering, Campus Queretaro, 76130, Mexico
| | | | | | - Goldie Oza
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica (CIDETEQ), Parque Tecnológico Querétaro S/n, Sanfandila. Pedro Escobedo, Querétaro, 76703, Mexico
| | - Shiek S S J Ahmed
- Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Kelambakkam, India
| | - Sathishkumar Ramalingam
- Plant Genetic Engineering Laboratory, Department of Biotechnology, Bharathiar University, Coimbatore, 641046, India
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico.
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26
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Guo Z, Zhang Y, Jia H, Guo J, Meng X, Wang J. Electrochemical methods for landfill leachate treatment: A review on electrocoagulation and electrooxidation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150529. [PMID: 34600209 DOI: 10.1016/j.scitotenv.2021.150529] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/18/2021] [Accepted: 09/19/2021] [Indexed: 06/13/2023]
Abstract
Landfill leachate is a kind of difficult-to-degrade wastewater with complex water qualities. Waste filtrate cannot be thoroughly treated by traditional biological, physical and chemical methods. In the past five years, electrochemical methods have attracted widespread attention in the treatment of landfill leachate. The article pointed out that for the colloidal/suspended particles in the landfill leachate, using of electrocoagulation can achieve a good treatment effect. Aiming at the characteristics of the dissolved organic matter in the landfill leachate and the high concentration of chloride ions, a more efficient removal can be available by using of electrooxidation. In this review, the latest achievements and basic principles of electrocoagulation and electrooxidation have been introduced. Meanwhile, the influence of different process parameters on these two electrochemical methods was summarized. It also reviewed the effect of electrochemical technology as an independent system or combined with biological and physical chemical processes on the treatment of landfill leachate, as well as the cost of various laboratory scales. Finally, several main problems and challenges encountered by electrochemical methods were briefly discussed, and the prospects for new development and future research were also provided.
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Affiliation(s)
- Zijing Guo
- State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, China
| | - Yang Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Hui Jia
- State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, China.
| | - Jiaran Guo
- State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Xia Meng
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, China
| | - Jie Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China.
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27
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Zhao S, Wang J, Feng S, Xiao Z, Chen C. Effects of ecohydrological interfaces on migrations and transformations of pollutants: A critical review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 804:150140. [PMID: 34509841 DOI: 10.1016/j.scitotenv.2021.150140] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/24/2021] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Abstract
With the rapid development of society, the soil and water environments in many countries are suffering from severe pollution. Pollutants in different phases will eventually gather into the soil and water environments, and a series of migrations and transformations will take place at ecohydrological interfaces with water flow. However, it is still not clear how ecohydrological interfaces affect the migration and the transformation of pollutants. Therefore, this paper summarizes the physical, ecological, and biogeochemical characteristics of ecohydrological interfaces on the basis of introducing the development history of ecohydrology and the concept of ecohydrological interfaces. The effects of ecohydrological interfaces on the migration and transformation of heavy metals, organic pollutants, and carbon‑nitrogen‑phosphorus (C-N-P) pollutants are emphasized. Lastly, the prospects of applying ecohydrological interfaces for the removal of pollutants from the soil and water environment are put forward, including strengthening the ability to monitor and simulate ecohydrological systems at micro and macro scales, enhancing interdisciplinary research, and identifying main influencing factors that can provide theoretical basis and technical support.
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Affiliation(s)
- Shan Zhao
- College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China; College of Civil Engineering, Tongji University, Shanghai 200092, China
| | - Jianhua Wang
- College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China
| | - Shijin Feng
- College of Civil Engineering, Tongji University, Shanghai 200092, China.
| | - Zailun Xiao
- College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China
| | - Chunyan Chen
- College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China
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28
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Sustainable Electrochemical NO Capture and Storage System Based on the Reversible Fe2+/Fe3+-EDTA Redox Reaction. Catalysts 2022. [DOI: 10.3390/catal12010079] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The removal of nitric oxide (NO), which is an aggregation agent for fine dust that causes air pollution, from exhaust gas has been considered an important treatment in the context of environmental conservation. Herein, we propose a sustainable electrochemical NO removal system based on the reversible Fe2+/Fe3+-ethylenediamine tetraacetic acid (EDTA) redox reaction, which enables continuous NO capture and storage at ambient temperature without the addition of any sacrificial agents. We have designed a flow-type reaction system in which the NO absorption and emission can be separately conducted in the individual reservoirs of the catholyte and anolyte with the continuous regeneration of Fe2+-EDTA by the electrochemical reduction in Fe3+-EDTA. A continuous flow reaction using a silver cathode and glassy carbon anode showed that the concentrations of Fe2+ and Fe3+-EDTA in the electrolyte were successfully maintained at a 1:1 ratio, which demonstrates that the proposed system can be applied for continuous NO capture and storage.
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29
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Fu P, Yan Q, Wang S, Wu H, Cao D. A visible-light-gated donor–acceptor Stenhouse adduct chemosensor: synthesis, photochromism and naked-eye colorimetric/fluorometric sensing of Al 3+ and Zn 2+. NEW J CHEM 2022. [DOI: 10.1039/d2nj00969b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible-light-gated donor–acceptor Stenhouse adduct chemosensor is designed for the colorimetric/fluorometric sensing of Al3+ and Zn2+.
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Affiliation(s)
- Peng Fu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510641, China
- School of Chemistry and Chemical Engineering, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Research Center for West Guangdong biomedical Engineering & Technology in Universities of Guangdong, Lingnan Normal University, Zhanjiang, 524048, China
| | - Qing Yan
- School of Chemistry and Chemical Engineering, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Research Center for West Guangdong biomedical Engineering & Technology in Universities of Guangdong, Lingnan Normal University, Zhanjiang, 524048, China
| | - Sheng Wang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510641, China
- School of Chemistry and Chemical Engineering, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Research Center for West Guangdong biomedical Engineering & Technology in Universities of Guangdong, Lingnan Normal University, Zhanjiang, 524048, China
| | - Hanlun Wu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510641, China
| | - Derong Cao
- School of Chemistry and Chemical Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510641, China
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30
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Guo H, Xu Z, Wang D, Chen S, Qiao D, Wan D, Xu H, Yan W, Jin X. Evaluation of diclofenac degradation effect in "active" and "non-active" anodes: A new consideration about mineralization inclination. CHEMOSPHERE 2022; 286:131580. [PMID: 34280831 DOI: 10.1016/j.chemosphere.2021.131580] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 07/13/2021] [Accepted: 07/15/2021] [Indexed: 06/13/2023]
Abstract
This work investigates the electrochemical oxidation (EO) of diclofenac (DCF) in water with Ti/Ti4O7, Ti/Ru-Ir, Ti/Sb-SnO2 and Ti/PbO2 electrodes. Scanning electron microscope and X-ray diffraction results suggest that Ti/Ti4O7 has porous stacked surface morphology and Ti/Sb-SnO2 possesses the smallest grain size. Linear sweep voltammetry test results indicate that PbO2 has the highest oxygen evolution potential, while Ti/Ti4O7 and Ti/Ru-Ir show better oxygen evolution activity. DCF degradation results reveal that PbO2 possessed the highest DCF removal (RDCF = 99.2%) and chemical oxygen demand (COD) removal (RCOD = 97.0%), the fastest COD degradation rate (k = 0.0275 min-1, R2 = 0.964), the lowest specific energy consumption (ECDCF = 1.81 kWh.g DCF-1, ECTOC = 6.90 kWh.g TOC-1). The toxicity variation of DCF during EO process on PbO2 is rise first and then to fall. Considering the differences of the four electrodes in residual, conversion and mineralization aspects, mineralization selectivity (MS) was proposed to estimate the mineralization inclination of electrodes during EO process, and PbO2 displays the strongest mineralization inclination (MS = 0.594). In addition, the possible degradation pathway of DCF on PbO2 electrode indicates a composite behavior of conversion and mineralization. All of them above indicate the promising application potential of PbO2 in lower concentration pharmaceuticals and personal care products wastewater treatment. Moreover, MS could be employed as a supplementary index to assess the different inclinations of this composite behavior on various electrodes used for electrochemical treatment of organics in later studies.
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Affiliation(s)
- Hua Guo
- Dep. of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China; Research Institute of Xi'an Jiaotong University, Zhejiang, Hangzhou, 311200, PR China
| | - Zhicheng Xu
- Dep. of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China
| | - Dan Wang
- Dep. of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China
| | - Shiyu Chen
- Dep. of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China; Research Institute of Xi'an Jiaotong University, Zhejiang, Hangzhou, 311200, PR China
| | - Dan Qiao
- Dep. of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China; Research Institute of Xi'an Jiaotong University, Zhejiang, Hangzhou, 311200, PR China
| | - Dan Wan
- Dep. of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China; Shaanxi Zhengwei Environmental Testing CO., LTD, Xi'an, 710049, PR China
| | - Hao Xu
- Dep. of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China; Research Institute of Xi'an Jiaotong University, Zhejiang, Hangzhou, 311200, PR China.
| | - Wei Yan
- Dep. of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China; Research Institute of Xi'an Jiaotong University, Zhejiang, Hangzhou, 311200, PR China
| | - Xiaoliang Jin
- Shaanxi Zhengwei Environmental Testing CO., LTD, Xi'an, 710049, PR China
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31
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SBA-ionic liquid as an efficient adsorbent of palladium, silver, and gold ions. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-021-02302-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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32
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Yuan L, Yuan GQ. Electrosynthesis of 1,3,5-trisubstituted 1,2,4-triazoles from phenylhydrazine, aldehydes and amines under mild conditions. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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33
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Enhancing the stability and electrocatalytic activity of Ti-based PbO2 anodes by introduction of an arc-sprayed TiN interlayer. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139398] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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34
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Wang Y, Xiang Q, Zhou Q, Xu J, Pei D. Mini Review: Advances in 2-Haloacid Dehalogenases. Front Microbiol 2021; 12:758886. [PMID: 34721367 PMCID: PMC8554231 DOI: 10.3389/fmicb.2021.758886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 09/13/2021] [Indexed: 11/13/2022] Open
Abstract
The 2-haloacid dehalogenases (EC 3.8.1.X) are industrially important enzymes that catalyze the cleavage of carbon-halogen bonds in 2-haloalkanoic acids, releasing halogen ions and producing corresponding 2-hydroxyl acids. These enzymes are of particular interest in environmental remediation and environmentally friendly synthesis of optically pure chiral compounds due to their ability to degrade a wide range of halogenated compounds with astonishing efficiency for enantiomer resolution. The 2-haloacid dehalogenases have been extensively studied with regard to their biochemical characterization, protein crystal structures, and catalytic mechanisms. This paper comprehensively reviews the source of isolation, classification, protein structures, reaction mechanisms, biochemical properties, and application of 2-haloacid dehalogenases; current trends and avenues for further development have also been included.
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Affiliation(s)
- Yayue Wang
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
| | - Qiao Xiang
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Qingfeng Zhou
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
| | - Jingliang Xu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, China
- Zhengzhou Tuoyang Industrial Co., Ltd., Zhengzhou, China
| | - Dongli Pei
- College of Biology and Food, Shangqiu Normal University, Shangqiu, China
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35
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Catalytic Efficient Electro-oxidation Degradation of DO26 Textile Dye via UV/VIS, COD, and GC/MS Evaluation of By-products. Electrocatalysis (N Y) 2021. [DOI: 10.1007/s12678-021-00683-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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36
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Guo Y, Xu Z, Guo S, Chen S, Xu H, Xu X, Gao X, Yan W. Selection of anode materials and optimization of operating parameters for electrochemical water descaling. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118304] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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37
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Dauda M, Basheer C, Al-Malack MH, Siddiqui MN. Efficient Co-MoS2 electrocatalyst for cathodic degradation of halogenated disinfection by-products in water sample. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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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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39
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Guo H, Xu Z, Qiao D, Wang L, Xu H, Yan W. Fabrication and characterization of titanium-based lead dioxide electrode by electrochemical deposition with Ti 4 O 7 particles. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:42-50. [PMID: 32304604 DOI: 10.1002/wer.1339] [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: 02/29/2020] [Revised: 04/03/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
A novelly modified Ti/PbO2 electrode was synthesized with Ti4 O7 particles through electrochemical deposition method (marked as PbO2 -Ti4 O7 ). The properties of the as-prepared electrodes were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), hydroxyl radical concentration, accelerated life test, etc. Azophloxine was chosen as the model pollutant for electro-catalytic oxidation to evaluate electrochemical activity of the electrode. The experimental results indicated that Ti4 O7 modification could prominently improve the properties of the electrodes, especially, improve the surface morphology, enhance the current response, and reduce the impedance. However, the predominant phases of PbO2 electrodes were unchanged, which were completely pure β-PbO2 . During the electrochemical oxidation process, the PbO2 -Ti4 O7 (1.0) electrode showed the best performance on degradation of AR1 (i.e., the highest removal efficiency and the lowest energy consumption), which could be attributed to its high oxygen evolution potential (OEP) and strong capability of HO· generation. Moreover, the accelerated service lifetime of PbO2 -Ti4 O7 (1.0) electrode was 175 hr, 1.65 times longer than that of PbO2 electrode (105.5 hr). PRACTITIONER POINTS: PbO2 /Ti4 O7 composite anode was fabricated through electrochemical co-deposition. Four concentration gradients of Ti4 O7 particle were tested. PbO2 -Ti4 O7 (1.0) showed optimal electrocatalytic ability due to its high OEP and HO· productivity.
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Affiliation(s)
- Hua Guo
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Zhicheng Xu
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Dan Qiao
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Liangtian Wang
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Hao Xu
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
| | - Wei Yan
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, China
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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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41
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Mramba AS, Ndibewu PP, Sibali LL, Makgopa K. A Review on Electrochemical Degradation and Biopolymer Adsorption Treatments for Toxic Compounds in Pharmaceutical Effluents. ELECTROANAL 2020. [DOI: 10.1002/elan.202060454] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Anita S. Mramba
- Department of Chemistry, Faculty of Science Tshwane University of Technology, Private Bag X680 175 Nelson Mandela Drive Arcadia Pretoria 0001 South Africa
| | - Peter P. Ndibewu
- Department of Chemistry, Faculty of Science Tshwane University of Technology, Private Bag X680 175 Nelson Mandela Drive Arcadia Pretoria 0001 South Africa
| | - Linda L. Sibali
- University of South Africa, Department of Environmental Sciences, Florida Campus postcode is missing Florida South Africa
| | - Katlego Makgopa
- Department of Chemistry, Faculty of Science Tshwane University of Technology, Private Bag X680 175 Nelson Mandela Drive Arcadia Pretoria 0001 South Africa
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42
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Liu P, Wang X, Lu J, Li Y, Hou B, Feng L. Removal of antipyrine through two-dimensional and three-dimensional electrolysis: comparison, modification, and improvement. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:40837-40847. [PMID: 32677015 DOI: 10.1007/s11356-020-09763-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Abstract
In this work, removal of antipyrine was studied through two-dimensional (2D) and three-dimensional (3D) electrolysis. 2D electrolysis was firstly studied with the Ti/SnO2-Ta2O5-IrO2 anode as working electrode. Operating parameters affecting antipyrine removal, such as current density, electrode distance, and initial concentration of antipyrine, were investigated and optimized. As the limited antipyrine removal efficiency of 48.0% was not satisfying, 3D electrolysis with γ-Al2O3 as particle electrodes was introduced in the purpose of improving the antipyrine removal. An obviously enhanced removal efficiency of 78.3% was obtained, which seemingly validated the effect of particle electrodes in improving antipyrine removal. Hence, an effort to further enhance the antipyrine removal efficiency was made through improving the electrochemical characteristics of γ-Al2O3 as particle electrodes. Modified Sn-Sb-Bi/γ-Al2O3 particles were thus prepared through impregnation method. And a desirable antipyrine removal efficiency of 94.4% and energy consumption of 0.18 kWh/g antipyrine were achieved in the 3D electrolysis with Sn-Sb-Bi/γ-Al2O3 as particle electrodes. Furthermore, possible mechanism and pathway of antipyrine degradation in 3D electrolysis were explored through detection of ·OH using terephthalic acid fluorescent probe method and detection of antipyrine degradation intermediates using LC-MS.
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Affiliation(s)
- Pengxiao Liu
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, People's Republic of China.
| | - Xu Wang
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, People's Republic of China
| | - Jing Lu
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, People's Republic of China
| | - Ying Li
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, People's Republic of China
| | - Bin Hou
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, People's Republic of China
| | - Ling Feng
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, People's Republic of China
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43
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Influence of the RuO2 layer thickness on the physical and electrochemical properties of anodes synthesized by the ionic liquid method. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136625] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Li Y, He C, Li Z, Zhang Y, Wu B, Shi Q. Molecular transformation of dissolved organic matter in refinery wastewater. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:107-119. [PMID: 32910796 DOI: 10.2166/wst.2020.334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Dissolved organic matter (DOM) has an important impact on the water treatment and reuse of petroleum refinery wastewater. In order to improve the treatment efficiency, it is necessary to understand the chemical composition of the DOM in the treatment processes. In this paper, the molecular composition of DOM in wastewater samples from a representative refinery were characterized. The transformation of various compounds along the wastewater treatment processes was investigated. A total of 61 heteroatomic class species were detected from the DOM extracts, in which CHO (molecules composed of carbon, hydrogen, and oxygen atoms) and CHOS (CHO molecules that also contained sulfur) class species were the most abundant and account for 78.43% in relative mass peak abundance. The solid phase extraction DOM from the dichloromethane unextractable fraction exhibited a more complex molecular composition and contained more oxygen atoms than in the dichloromethane extract. During wastewater treatment processes, the chemical oxygen demand (COD) and ammonia-nitrogen were reduced by more than 90%. Volatile organic compounds (VOCs) accounted for about 30% of the total COD, in which benzene and toluene were dominant. After biochemical treatment, the VOCs were effectively removed but the molecular diversity of the DOM was increased and new compounds were generated. Sulfur-containing class species were more recalcitrant to biodegradation, so the origin and transformation of these compounds should be the subject of further research.
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Affiliation(s)
- Yuguo Li
- State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing 102206, China; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China E-mail:
| | - Chen He
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China E-mail:
| | - Ze Li
- State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing 102206, China
| | - Yuxi Zhang
- State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing 102206, China; Daqing Oilfield Water Company, Daqing, Heilongjiang 163454, China
| | - Baichun Wu
- State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing 102206, China
| | - Quan Shi
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China E-mail:
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45
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Yin H, Cao X, Lei C, Chen W, Huang B. Insights into Electroreductive Dehalogenation Mechanisms of Chlorinated Environmental Pollutants. ChemElectroChem 2020. [DOI: 10.1002/celc.202000067] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Hanshuang Yin
- College of Environmental Science and Engineering, Hunan University Key Laboratory of Environmental Biology and Pollution ControlHunan University, Ministry of Education Changsha 410082 China
| | - Xingkai Cao
- College of Environmental Science and Engineering, Hunan University Key Laboratory of Environmental Biology and Pollution ControlHunan University, Ministry of Education Changsha 410082 China
| | - Chao Lei
- School of Hydraulic EngineeringChangsha University of Science & Technology Changsha 410114 China
| | - Wenqian Chen
- Department of Chemical Engineering and TechnologyImperial College London Exhibition Road London SW7 2AZ UK
| | - Binbin Huang
- College of Environmental Science and Engineering, Hunan University Key Laboratory of Environmental Biology and Pollution ControlHunan University, Ministry of Education Changsha 410082 China
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46
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Wantulok J, Degano I, Gal M, Nycz JE, Sokolova R. IR spectroelectrochemistry as efficient technique for elucidation of reduction mechanism of chlorine substituted 1,10-phenanthrolines. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.113888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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47
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A 2.5D Electrode System Constructed of Magnetic Sb–SnO2 Particles and a PbO2 Electrode and Its Electrocatalysis Application on Acid Red G Degradation. Catalysts 2019. [DOI: 10.3390/catal9110875] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A novel electrode consisting of a Ti/PbO2 shell and Fe3O4/Sb–SnO2 particles was developed for electrochemical oxidation treatment of wastewater. Scanning electron microscope (SEM), X-ray diffraction (XRD), the current limiting method, toxicity experiments, and high-performance liquid chromatography were adopted to characterize its morphology, crystal structure, electrochemical properties, the toxicity of the wastewater, and hydroxyl radicals. Acid Red G (ARG), a typical azo dye, was additionally used to test the oxidation ability of the electrode. Results indicated that the 2.5D electrode could significantly improve the mass transfer coefficient and •OH content of the 2D electrode, thereby enhancing the decolorization, degradation, and mineralization effect of ARG, and reducing the toxicity of the wastewater. The experiments revealed that, at higher current density, lower dye concentration and higher temperature, the electrochemical oxidation of ARG favored. Under the condition of 50 mA/cm2, 25 °C, and 100 ppm, the ARG, Chemical Oxygen Demand (COD) and Total Organic Carbon (TOC) removal efficiency reached 100%, 65.89%, and 52.52%, respectively, and the energy consumption and the current efficiency were 1.06 kWh/g COD, 8.29%, and energy consumption for TOC and mineralization current efficiency were 3.81 kWh/g COD, 9.01%. Besides, the Fe3O4/Sb–SnO2 particles after electrolysis for 50 h still had remarkable stability. These results indicated that the ARG solution could be adequately removed on the 2.5D electrode, providing an effective method for wastewater treatment.
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