1
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Scolaro C, Liotta LF, Calabrese C, Marcì G, Visco A. Adhesive and Rheological Features of Ecofriendly Coatings with Antifouling Properties. Polymers (Basel) 2023; 15:polym15112456. [PMID: 37299255 DOI: 10.3390/polym15112456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/16/2023] [Accepted: 05/21/2023] [Indexed: 06/12/2023] Open
Abstract
In this work, formulations of "environmentally compatible" silicone-based antifouling, synthesized in the laboratory and based on copper and silver on silica/titania oxides, have been characterized. These formulations are capable of replacing the non-ecological antifouling paints currently available on the market. The texture properties and the morphological analysis of these powders with an antifouling action indicate that their activity is linked to the nanometric size of the particles and to the homogeneous dispersion of the metal on the substrate. The presence of two metal species on the same support limits the formation of nanometric species and, therefore, the formation of homogeneous compounds. The presence of the antifouling filler, specifically the one based on titania (TiO2) and silver (Ag), facilitates the achievement of a higher degree of cross-linking of the resin, and therefore, a better compactness and completeness of the coating than that attained with the pure resin. Thus, a high degree of adhesion to the tie-coat and, consequently, to the steel support used for the construction of the boats was achieved in the presence of the silver-titania antifouling.
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Affiliation(s)
- Cristina Scolaro
- Department of Engineering, University of Messina, Contrada Di Dio, 98166 Messina, Italy
| | - Leonarda Francesca Liotta
- Istituto per lo Studio dei Materiali Nanostrutturati (ISMN)-CNR, Via Ugo La Malfa 153, 90146 Palermo, Italy
| | - Carla Calabrese
- Istituto per lo Studio dei Materiali Nanostrutturati (ISMN)-CNR, Via Ugo La Malfa 153, 90146 Palermo, Italy
| | - Giuseppe Marcì
- "Schiavello-Grillone" Photocatalysis Group, Department of Engineering, University of Palermo, Viale Delle Scienze, 90128 Palermo, Italy
| | - Annamaria Visco
- Department of Engineering, University of Messina, Contrada Di Dio, 98166 Messina, Italy
- Institute for Polymers, Composites and Biomaterials, CNR-IPCB, Via P. Gaifami 18, 9-95126 Catania, Italy
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2
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Interplay of electronic and geometric structure on Cu phenanthroline, bipyridine and derivative complexes, synthesis, characterization, and reactivity towards oxygen. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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3
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Li H, Liu X, Chen X, Chen Y, Li Y, Motkuri RK, Dai Z, Kumar A, Fang T, Shen J. Novel catalysts with multivalence copper for organic pollutants removal from wastewater with excellent selectivity and stability in Fenton-like process under neutral pH conditions. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2022; 94:e10816. [PMID: 36471565 DOI: 10.1002/wer.10816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/21/2022] [Accepted: 11/15/2022] [Indexed: 06/09/2023]
Abstract
Fenton-like reaction has been widely used for organics degradation. However, most Fenton-like reaction works at low pH range (pH < 4) with uncontrollable selectivity of hydroxyl radicals from H2 O2 activation, and unsatisfied catalyst stability, which is compromised advanced oxidation performance for water/wastewater treatments. In this work, to solve the drawbacks, novel copper catalysts were fabricated via hydrogen reduction/calcination of Cu2+ -supported Al/MCM-41 with precisely controllable copper valence state. Compared with catalysts with monovalence copper (i.e., CuO, Cu, and Cu2+ ), the obtained catalysts with multivalence copper present higher selectivity, excellent stability towards •OH radical pathways, and outperformance in pCBA degradation efficiency at neutral state. In addition, the fabricated catalysts also exhibited excellent phenol removal efficiency (75.5%) and H2 O2 utilization efficiency (47.9%) within neutral environment. Moreover, the degradation efficiency of phenol approaches to 100% within only 2 h. The catalyst also shows good stability for organic pollutants removal, which shows good potential in catalytic oxidation for phenolic compounds-containing wastewater in Fenton-like reaction, especially under neutral pH conditions. PRACTITIONER POINTS: Multivalence copper presents great potentials for organic compounds removal at neutral condition. Multivalence copper shows higher selectivity toward •OH and good stability at neutral condition. Multivalence copper exhibiters outperformed phenol removal efficiency at neutral condition.
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Affiliation(s)
- Haitao Li
- College of Environment and Resources, Xiangtan University, Xiangtan, China
- Jiangxi Provincial Key Laboratory of Low-Carbon Solid Waste Recycling, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, China
- Beijing Engineering Research Center of Process Pollution Control, Division of Environment Technology and Engineering, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Xiang Liu
- National Key Laboratory of Human Factors Engineering, Chinese Astronaut Research and Training Center, Beijing, China
| | - Xueli Chen
- Jiangxi Provincial Key Laboratory of Low-Carbon Solid Waste Recycling, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, China
| | - Yonglin Chen
- Jiangxi Provincial Key Laboratory of Low-Carbon Solid Waste Recycling, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, China
| | - Yuping Li
- Beijing Engineering Research Center of Process Pollution Control, Division of Environment Technology and Engineering, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Radha Kishan Motkuri
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Zhongde Dai
- School of Carbon Neutrality Future Technology, Sichuan University, Chengdu, China
| | - Abhishek Kumar
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Tian Fang
- Huatian Engineering and Technology Corporation, MCC, Ma'anshan, China
| | - Jian Shen
- College of Environment and Resources, Xiangtan University, Xiangtan, China
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4
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Jin X, Zhao H, Chao Z, Wang X, Zhang Q, Ju H, Liu Y. Self-assembled Cupric Oxide Nanoclusters for Highly efficient chemodynamic therapy. Chem Asian J 2022; 17:e202200296. [PMID: 35713338 DOI: 10.1002/asia.202200296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 06/04/2022] [Indexed: 11/11/2022]
Abstract
Chemodynamic therapy (CDT) based on Fenton and Fenton-like reactions induces cancer cell killing via in situ catalyzing H2 O2 and generating highly oxidative hydroxyl radicals (⋅OH) in tumor sites. Their application is not limited by tumor grown depth or hypoxic microenvironment. However, the reaction efficiency is still hampered due to the structure of catalytic agents and the requirement for low pH environment. Here, we design a porous CuO nanocluster (CuO NC) through self-assembly of oleylamine stabilized CuO NPs (OAm-CuO NPs), and functionalize it with folic acid (CuO NC-FA) for specific tumor cell targeting. It can catalyze H2 O2 with high efficiency in nearly neutral environment. Besides, the porous structure of CuO NC also helps the diffusion of H2 O2 to the interior of nanocluster to further improve Fenton-like reaction efficiency. The convenient synthesis of CuO NC-FA with good Fenton-like reaction efficiency at neutral environment demonstrates good chemodynamic therapy effect.
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Affiliation(s)
- Xinyu Jin
- State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R China
| | - Hongxia Zhao
- State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R China
| | - Zhicong Chao
- State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R China
| | - Xiaofeng Wang
- Department of Urology Affiliated Drum Tower Hospital, Medical School of Nanjing University Institute of Urology, Nanjing University, Nanjing, 210008, P. R. China
| | - Qing Zhang
- Department of Urology Affiliated Drum Tower Hospital, Medical School of Nanjing University Institute of Urology, Nanjing University, Nanjing, 210008, P. R. China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R China
| | - Ying Liu
- State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R China.,Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210023, P. R. China
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5
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Yuan P, Ma H, Shen B, Ji Z. Abatement of NO/SO 2/Hg 0 from flue gas by advanced oxidation processes (AOPs): Tech-category, status quo and prospects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150958. [PMID: 34656565 DOI: 10.1016/j.scitotenv.2021.150958] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/27/2021] [Accepted: 10/09/2021] [Indexed: 06/13/2023]
Abstract
This review article provides a state-of-art insight into the removal of NO, SO2 and elemental mercury (Hg0) from flue gas by using advanced oxidation processes (AOPs) method. Firstly, the main flue gas purification strategies based on AOPs would be classified as gas-gas, gas-liquid and gas-solid systems preliminarily, and the primary chemistry/mechanism of the above homogeneous/heterogeneous reaction systems were presented as the oxidation of NO, SO2 and Hg0 by the oxidative free radicals (OH, O2 and SO4-etc.). Secondly, the research progress and reaction pathways for separately or simultaneously removing NO, SO2 and Hg0 from flue gas by AOPs has been reviewed elaborated and analyzed in more details. Notably, the wet/dry oxidation coupled with efficient absorption process would be a promising method of efficient removal of above gaseous pollutants. Subsequently, four types of assumed layout modes were described graphically. The application prospects of AOPs for the purification of flue gas from coal-fired boiler or industrial furnace were evaluated and found that the operation cost and utilization of oxidants must be reduced and improved respectively. Finally, the limitations in the current removal technologies based on AOPs are highlighted, meanwhile the future research directions are suggested, such as cut down the cost of oxidants and catalysts, improve the yield and valid utilization of highly reactive radicals and enhance the reactivity, resistance and stability of catalysts. Significantly, it is also envisaged that the review could enrich the knowledge repository to function as a scientific reference for the sustainable development of economical, effective and environment-friendly technologies for the abatement of a wide variety of emissions from flue gas, and further improve the feasibility and reliability of the strategies for moving from laboratory studies to large-scale development and industrial application.
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Affiliation(s)
- Peng Yuan
- School of Chemical Engineering & Technology, Hebei University of Technology, Tianjin 300130, PR China; Tianjin Key Laboratory of Clean Energy Utilization and Pollutants Control, School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China.
| | - Haofei Ma
- Tianjin Key Laboratory of Clean Energy Utilization and Pollutants Control, School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China
| | - Boxiong Shen
- School of Chemical Engineering & Technology, Hebei University of Technology, Tianjin 300130, PR China; Tianjin Key Laboratory of Clean Energy Utilization and Pollutants Control, School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin 300401, PR China.
| | - Zhiyong Ji
- School of Chemical Engineering & Technology, Hebei University of Technology, Tianjin 300130, PR China.
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6
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Chuang PC, Lai YH. Selective production of formate over a CuO electrocatalyst by electrochemical and photoelectrochemical biomass valorisation. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00950a] [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
CuO acts as a selective (a) electrocatalyst for electrochemical formate production from various biomass wastes and (b) a cocatalyst on a hematite photoanode for photoelectrochemical formate production from glucose.
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Affiliation(s)
- Ping-Chang Chuang
- Department of Materials Science and Engineering, National Cheng Kung University, No.1, University Road, Tainan City 701, Taiwan
| | - Yi-Hsuan Lai
- Department of Materials Science and Engineering, National Cheng Kung University, No.1, University Road, Tainan City 701, Taiwan
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7
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Fu T, Gong X, Guo J, Yang Z, Liu Y. Zn-CNTs-Cu catalytic in-situ generation of H 2O 2 for efficient catalytic wet peroxide oxidation of high-concentration 4-chlorophenol. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123392. [PMID: 32763691 DOI: 10.1016/j.jhazmat.2020.123392] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 06/11/2023]
Abstract
4-chlorophenol (4-CP) with high concentration is difficult to degrade thoroughly by traditional treatment methods due to its high biotoxicity and refractory to bio-degradation. A novel catalytic wet peroxide oxidation (CWPO) system based on Zn-CNTs-Cu catalysts through the in-situ generation of H2O2 was constructed and investigated for the degradation of high-concentration 4-CP for the first time. Zn-CNTs-Cu composite was prepared by the infiltration melting-chemical replacement method. The operational factors effect, mechanism, and pathways of Zn-CNTs-Cu/O2 system for high concentration of 4-CP degradation were systematically performed and discussed. At the optimal experimental conditions, the degradation efficiency of 4-CP through CWPO system with Zn-CNTs-Cu/O2 achieved 100 %, which was 689 % higher than that of wet oxidation system with O2 alone. According to the mainly in-situ generated H2O2, the strong oxidative OH radical and wet-oxidation effect of O2, high concentration of 4-CP degraded into small molecular organic matter, even been mineralized into carbon dioxide and water in the Zn-CNTs-Cu/O2 based CWPO system. Overall, Zn-CNTs-Cu/O2 CWPO system can efficiently degrade high-concentration 4-CP through the in-situ generation of H2O2 without extra replenishment, and it provides a novel method and strategy to the efficient treatment of refractory chlorophenols wastewater.
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Affiliation(s)
- Tao Fu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan 610066, China; Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Xiaobo Gong
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan 610066, China; Key Laboratory of Special Waste Water Treatment, Sichuan Province Higher Education System, Chengdu, Sichuan 610066, China.
| | - Jinrui Guo
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan 610066, China
| | - Zhao Yang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan 610066, China
| | - Yong Liu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan 610066, China; Key Laboratory of Special Waste Water Treatment, Sichuan Province Higher Education System, Chengdu, Sichuan 610066, China.
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8
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Yan B, Ai Y, Sun Q, Ma Y, Cao Y, Wang J, Zhang Z, Wang X. Membrane Damage during Ferroptosis Is Caused by Oxidation of Phospholipids Catalyzed by the Oxidoreductases POR and CYB5R1. Mol Cell 2020; 81:355-369.e10. [PMID: 33321093 DOI: 10.1016/j.molcel.2020.11.024] [Citation(s) in RCA: 273] [Impact Index Per Article: 68.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 10/21/2020] [Accepted: 11/10/2020] [Indexed: 01/18/2023]
Abstract
Ferroptosis is a form of necrotic cell death caused by iron-dependent peroxidation of polyunsaturated phospholipids on cell membranes and is actively suppressed by the cellular antioxidant systems. We report here that oxidoreductases, including NADPH-cytochrome P450 reductase (POR) and NADH-cytochrome b5 reductase (CYB5R1), transfer electrons from NAD(P)H to oxygen to generate hydrogen peroxide, which subsequently reacts with iron to generate reactive hydroxyl radicals for the peroxidation of the polyunsaturated fatty acid (PUFA) chains of membrane phospholipids, thereby disrupting membrane integrity during ferroptosis. Genetic knockout of POR and CYB5R1 decreases cellular hydrogen peroxide generation, preventing lipid peroxidation and ferroptosis. Moreover, POR knockdown in mouse liver prevents ConA-induced liver damage. Ferroptosis, therefore, is a result of incidental electron transfer carried out by POR/CYB5R1 oxidoreductase and thus needs to be constitutively countered by the antioxidant systems.
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Affiliation(s)
- Bo Yan
- National Institute of Biological Sciences, 7 Science Park Road, Zhongguancun Life Science Park, Beijing, 102206, China; Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100871, China.
| | - Youwei Ai
- National Institute of Biological Sciences, 7 Science Park Road, Zhongguancun Life Science Park, Beijing, 102206, China; Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100871, China.
| | - Qi Sun
- National Institute of Biological Sciences, 7 Science Park Road, Zhongguancun Life Science Park, Beijing, 102206, China
| | - Yan Ma
- National Institute of Biological Sciences, 7 Science Park Road, Zhongguancun Life Science Park, Beijing, 102206, China; Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100871, China
| | - Yang Cao
- National Institute of Biological Sciences, 7 Science Park Road, Zhongguancun Life Science Park, Beijing, 102206, China; Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100871, China
| | - Jiawen Wang
- National Institute of Biological Sciences, 7 Science Park Road, Zhongguancun Life Science Park, Beijing, 102206, China; Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100871, China
| | - Zhiyuan Zhang
- National Institute of Biological Sciences, 7 Science Park Road, Zhongguancun Life Science Park, Beijing, 102206, China; Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100871, China
| | - Xiaodong Wang
- National Institute of Biological Sciences, 7 Science Park Road, Zhongguancun Life Science Park, Beijing, 102206, China; Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, 100871, China
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9
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Ramirez-Sanchez IM, Apul OG, Saleh NB. Photocatalytic activity of micron-scale brass on emerging pollutant degradation in water: mechanism elucidation and removal efficacy assessment. RSC Adv 2020; 10:39931-39942. [PMID: 35515381 PMCID: PMC9057414 DOI: 10.1039/d0ra06153k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 10/20/2020] [Indexed: 12/14/2022] Open
Abstract
Alloys or smelted metal mixtures have served as cornerstones of human civilization. The advent of smelted copper and tin, i.e., bronze, in the 4th millennium B.C. in Mesopotamia has pioneered the preparation of other metal composites, such as brass (i.e., mixture of copper and zinc), since the bronze age. The contemporary use of these alloys has expanded beyond using their physical strength. The catalytic chemistry of micron-scale brass or copper–zinc alloy can be utilized to effectively degrade emerging contaminants (ECs) in water, which are presenting significant risks to human health and wildlife. Here, we examine the photocatalytic activity of a commercially available micro-copper–zinc alloy (KDF® 55, MicroCuZn), made with earth abundant metals, for oxidative removal of two ECs. The micron-scale brass is independently characterized for its morphology, which confirms that it has the β-brass phase and that its plasmonic response is around 475 nm. Estriol (E3), a well-known EC, is removed from water with ultraviolet (UV) radiation catalyzed by MicroCuZn and H2O2–MicroCuZn combinations. The synergy between H2O2, UV, and MicroCuZn enhances hydroxyl radical (˙OH) generation and exhibit a strong pseudo-first-order kinetic degradation of E3 with a decay constant of 1.853 × 10−3 min−1 (r2 = 0.999). Generation of ˙OH is monitored with N,N-dimethyl-4-nitrosoaniline (pNDA) and terephthalic acid (TA), which are effective ˙OH scavengers. X-ray photoelectron spectroscopy analysis has confirmed ZnO/CuO–Cu2O film formation after UV irradiation. The second EC studied here is Δ9-tetrahydrocannabinol or THC, a psychotropic compound commonly consumed through recreational or medicinal use of marijuana. The exceptionally high solids–water partitioning propensity of THC makes adsorption the dominant removal mechanism, with photocatalysis potentially supporting the removal efficacy of this compound. These results indicate that MicroCuZn can be a promising oxidative catalyst especially for degradation of ECs, with possible reusability of this historically significant material with environmentally-friendly attributes. Micron-scale brass is a catalyst that can be activated with ultraviolet radiation to remove emerging contaminants from water via oxidation by hydroxyl radicals.![]()
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Affiliation(s)
- Irwing M Ramirez-Sanchez
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin Austin TX 78712 USA +1 512 471 9175
| | - Onur G Apul
- Civil and Environmental Engineering, University of Maine Orono ME 04469 USA
| | - Navid B Saleh
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin Austin TX 78712 USA +1 512 471 9175
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10
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Zhang Y, Yin Z, Hui H, Wang H, Li Y, Liu G, Kang J, Li Z, Mamba BB, Li J. Constructing defect-rich V2O5 nanorods in catalytic membrane electrode for highly efficient oxidation of cyclohexane. J Catal 2020. [DOI: 10.1016/j.jcat.2020.04.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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11
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Li J, Pham AN, Dai R, Wang Z, Waite TD. Recent advances in Cu-Fenton systems for the treatment of industrial wastewaters: Role of Cu complexes and Cu composites. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122261. [PMID: 32066018 DOI: 10.1016/j.jhazmat.2020.122261] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 02/02/2020] [Accepted: 02/07/2020] [Indexed: 06/10/2023]
Abstract
Cu-based Fenton systems have been recognized as a promising suite of technologies for the treatment of industrial wastewaters due to their high catalytic oxidation capacity. Rapid progress regarding Cu Fenton systems has been made not only in fundamental mechanistic aspects of these systems but also with regard to applications over the past decade. Based on available literature, this review synthesizes the recent advances regarding both the understanding and applications of Cu-based Fenton processes for industrial wastewater treatment. Cu-based catalysts that are essential to the effectiveness of use of Cu Fenton reactions for oxidation of target species are mainly classified into two types: (i) Cu complexes with organic or inorganic ligands, and (ii) Cu composites with inorganic materials. Performance of the Cu-based catalysts for the removal of organic pollutants in industrial wastewaters are reviewed, with the key operating parameters illustrated. Furthermore, the roles of Cu complexes and composites in both homogeneous and heterogeneous Cu-Fenton systems are critically examined with particular focus on the mechanisms involved. Perspectives and future efforts needed for Cu-based Fenton systems using Cu complexes and composites for industrial wastewater treatment are presented.
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Affiliation(s)
- Jiayi Li
- State Key Laboratory of Pollution Control and Resources Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - A Ninh Pham
- School of Civil and Environmental Engineering, The University of New South Wales, Sydney, New South Wales, 2052, Australia
| | - Ruobin Dai
- State Key Laboratory of Pollution Control and Resources Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Zhiwei Wang
- State Key Laboratory of Pollution Control and Resources Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
| | - T David Waite
- State Key Laboratory of Pollution Control and Resources Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; School of Civil and Environmental Engineering, The University of New South Wales, Sydney, New South Wales, 2052, Australia
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12
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Keum C, Cho J, Park S, Lee S. Copper‐Coordinated Histidyl Bolaamphiphile Assembly as an Oxidative Catalyst: Coordination Structure and Catalytic Activity in Cyclohexane Oxidation. ChemCatChem 2019. [DOI: 10.1002/cctc.201900968] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Changjoon Keum
- Department of Chemical and Biomolecular EngineeringYonsei University 50 Yonsei-ro, Seodaemun-gu Seoul 03722 Korea
| | - Junghyun Cho
- Department of Chemical and Biomolecular EngineeringYonsei University 50 Yonsei-ro, Seodaemun-gu Seoul 03722 Korea
| | - Sunggook Park
- Department of Mechanical and Industrial EngineeringLouisiana State University Baton Rouge LA, 70803 USA
| | - Sang‐Yup Lee
- Department of Chemical and Biomolecular EngineeringYonsei University 50 Yonsei-ro, Seodaemun-gu Seoul 03722 Korea
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13
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Shen H, Song J, Zhou Z, Li M, Zhang R, Su P, Yang Y. DNA-Directed Immobilized Enzymes on Recoverable Magnetic Nanoparticles Shielded in Nucleotide Coordinated Polymers. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01341] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Hao Shen
- Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, College of Science, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Jiayi Song
- Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, College of Science, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Zixin Zhou
- Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, College of Science, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Mengqi Li
- Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, College of Science, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Ruiqi Zhang
- Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, College of Science, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Ping Su
- Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, College of Science, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Yi Yang
- Beijing Key Laboratory of Environmentally Harmful Chemical Analysis, College of Science, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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14
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de Sousa PVF, de Oliveira AF, da Silva AA, Lopes RP. Environmental remediation processes by zero valence copper: reaction mechanisms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:14883-14903. [PMID: 30972682 DOI: 10.1007/s11356-019-04989-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 03/25/2019] [Indexed: 06/09/2023]
Abstract
Recent studies have shown Cu(0) as a promising material for the removal of organic and inorganic pollutants. However, there is no review addressing the studies performed. This fact may be related to the toxicity of the particles and the copper released in solution that has not motivated researchers, which entails in a reduced number of publications. However, studies point out how to solve the problem of Cu deposition in support materials. In this work, a detailed review of Cu(0) applications was performed. The specific focus was the reaction mechanisms related to adsorption, oxidation, and reduction processes. Initially, the resources that allow the understanding of the reaction mechanism, such as characterization techniques and the experimental conditions for investigation of the species involved in the process, were presented. The studies were evaluated separately, showing the mechanisms involved only with the application of Cu(0) in pure and isolated form and in association with oxidizing or reductive agents, combined with irradiation sources and ultrasonic waves and in the form supported in polymer matrices. It was verified that by the proposed reaction mechanisms, the exclusive participation of Cu(0), being the removal process, explained only by the redox behavior of copper. Therefore, the review showed the need for future research regarding the redox behavior of the contaminants.
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Affiliation(s)
| | | | | | - Renata Pereira Lopes
- Chemistry Department, Universidade Federal de Viçosa, Viçosa, MG, 36570-000, Brazil.
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15
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Study on supercritical water oxidation of o-dichlorobenzene in a quartz micro-reactor with in situ microscope and Raman spectroscopy. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-018-00676-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Zhou C, Song Z, Yang H, Wu H, Wang B, Yu J, Sun L. Insight into elemental mercury (Hg 0) removal from flue gas using UV/H 2O 2 advanced oxidation processes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:21097-21105. [PMID: 29770935 DOI: 10.1007/s11356-018-2271-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 05/07/2018] [Indexed: 06/08/2023]
Abstract
Elemental mercury (Hg0) emitted from coal-fired power plants and municipal solid waste (MSW) incinerators has caused great harm to the environment and human beings. The strong oxidized •OH radicals produced by UV/H2O2 advanced oxidation processes were studied to investigate the performance of Hg0 removal from simulated flue gases. The results showed that when H2O2 concentration was 1.0 mol/L and the solution pH value was 4.1, the UV/H2O2 system had the highest Hg0 removal efficiency. The optimal reaction temperature was approximately 50 °C and Hg0 removal was inhibited when the temperature was higher or lower. The yield of •OH radicals during UV/H2O2 reaction was studied by electron paramagnetic resonance (EPR) analysis. UV radiation was the determining factor to remove Hg0 in UV/H2O2 system due to •OH generation during H2O2 decomposition. SO2 had little influence on Hg0 removal whereas NO had an inhibitory effect on Hg0 removal. The detailed findings for Hg0 removal reactions over UV/H2O2 make it an attractive method for mercury control from flue gases.
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Affiliation(s)
- Changsong Zhou
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China.
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China.
- School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, Jiangsu, China.
| | - Zijian Song
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Hongmin Yang
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Hao Wu
- Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210042, China
| | - Ben Wang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Jie Yu
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Lushi Sun
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China.
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17
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Armstrong RD, Peneau V, Ritterskamp N, Kiely CJ, Taylor SH, Hutchings GJ. The Role of Copper Speciation in the Low Temperature Oxidative Upgrading of Short Chain Alkanes over Cu/ZSM-5 Catalysts. Chemphyschem 2018; 19:469-478. [DOI: 10.1002/cphc.201701046] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 11/25/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Robert D. Armstrong
- Cardiff Catalysis Institute; School of Chemistry; Cardiff University; Park Place Cardiff CF10 1AQ UK
| | - Virginie Peneau
- Cardiff Catalysis Institute; School of Chemistry; Cardiff University; Park Place Cardiff CF10 1AQ UK
| | - Nadine Ritterskamp
- Cardiff Catalysis Institute; School of Chemistry; Cardiff University; Park Place Cardiff CF10 1AQ UK
| | - Christopher J. Kiely
- Department of Materials Science and Engineering; Lehigh University; 5 East Packer Avenue 18015-3195 Bethlehem Pennsylvania USA
| | - Stuart H. Taylor
- Cardiff Catalysis Institute; School of Chemistry; Cardiff University; Park Place Cardiff CF10 1AQ UK
| | - Graham J. Hutchings
- Cardiff Catalysis Institute; School of Chemistry; Cardiff University; Park Place Cardiff CF10 1AQ UK
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18
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New evidence for disinfection, self-cleaning and pollutant degradation mediated by GF-TiO 2 -Cu mats under solar/visible light in mild oxidative conditions. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.06.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Zhang Y, Fan J, Yang B, Huang W, Ma L. Copper-catalyzed activation of molecular oxygen for oxidative destruction of acetaminophen: The mechanism and superoxide-mediated cycling of copper species. CHEMOSPHERE 2017; 166:89-95. [PMID: 27689888 DOI: 10.1016/j.chemosphere.2016.09.066] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 08/18/2016] [Accepted: 09/15/2016] [Indexed: 06/06/2023]
Abstract
In this study, the commercial zero-valent copper (ZVC) was investigated to activate the molecular oxygen (O2) for the degradation of acetaminophen (ACT). 50 mg/L ACT could be completely decomposed within 4 h in the ZVC/air system at initial pH 3.0. The H2O2, hydroxyl radical (OH) and superoxide anion radical (O2-) were identified as the main reactive oxygen species (ROSs) generated in the above reaction; however, only OH caused the decomposition and mineralization of ACT in the copper-catalyzed O2 activation process. In addition, the in-situ generated Cu+ from ZVC dissolution not only activated O2 to produce H2O2, but also initiated the decomposition of H2O2 to generate OH. Meanwhile, the H2O2 could also be partly decomposed into O2-, which served as a mediator for copper cycling by reduction of Cu2+ to Cu+ in the ZVC/air system. Therefore, OH could be continuously generated; and then ACT was effectively degraded. Additionally, the effect of solution pH and the dosage of ZVC were also investigated. As a result, this study indicated the key behavior of the O2- during Cu-catalyzed activation of O2, which further improved the understanding of O2 activation mechanism by zero-valent metals.
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Affiliation(s)
- Yunfei Zhang
- National Engineering Research Center for Urban Pollution Control, State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, PR China; Department of Environmental Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, 518060 Shenzhen, PR China
| | - Jinhong Fan
- National Engineering Research Center for Urban Pollution Control, State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, PR China.
| | - Bo Yang
- Department of Environmental Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, 518060 Shenzhen, PR China.
| | - Wutao Huang
- National Engineering Research Center for Urban Pollution Control, State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, PR China
| | - Luming Ma
- National Engineering Research Center for Urban Pollution Control, State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, PR China
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20
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Devi P, Das U, Dalai AK. In-situ chemical oxidation: Principle and applications of peroxide and persulfate treatments in wastewater systems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 571:643-657. [PMID: 27453139 DOI: 10.1016/j.scitotenv.2016.07.032] [Citation(s) in RCA: 235] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 07/03/2016] [Accepted: 07/05/2016] [Indexed: 06/06/2023]
Abstract
Hydrogen peroxide (H2O2) and persulfate are the most efficient and commonly used oxidants in in-situ chemical oxidation (ISCO) of organic contaminants. This review focuses on the principle and activation techniques used in H2O2 and persulfate based ISCO processes. It is crucial to understand the effect of activation techniques on process chemistry and free radicals behaviour in order to achieve high degradation efficiency. The chemistry of interaction of activated H2O2 and persulfate with organic contaminants is complex and many parameters influence the performance of ISCO processes, namely non-productive reactants, reaction intermediates, oxygen and pH. The poor understanding of interaction behaviour and reaction chemistry of oxidants with organic contaminants prevents the utilization of full potential of the process. Therefore, particular attention has been given to the factors affecting degradation efficiency and the performance of ISCO processes. Further, the mechanism of contaminant degradation using activated H2O2 and persulfate significantly differ from each other. The interaction of SO4(-) radical usually involves electron transfer reactions whereas HO radical involve electron-transfer and hydrogen-atom abstraction reactions. Moreover, the research gaps have been identified based on the knowledge of current research and recommendations are made for further understanding of ISCO processes.
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Affiliation(s)
- Parmila Devi
- Department of Chemical and Biological Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada
| | - Umashankar Das
- Department of Chemical and Biological Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada
| | - Ajay K Dalai
- Department of Chemical and Biological Engineering, College of Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada.
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21
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Kalidhasan S, Ben-Sasson M, Dror I, Carmieli R, Schuster EM, Berkowitz B. Oxidation of aqueous organic pollutants using a stable copper nanoparticle suspension. CAN J CHEM ENG 2016. [DOI: 10.1002/cjce.22652] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sethu Kalidhasan
- Department of Earth and Planetary Sciences; Weizmann Institute of Science; Rehovot 7610001 Israel
| | - Moshe Ben-Sasson
- Department of Earth and Planetary Sciences; Weizmann Institute of Science; Rehovot 7610001 Israel
| | - Ishai Dror
- Department of Earth and Planetary Sciences; Weizmann Institute of Science; Rehovot 7610001 Israel
| | - Raanan Carmieli
- Department of Chemical Research Support; Weizmann Institute of Science; Rehovot 7610001 Israel
| | - Elaine M. Schuster
- Department of Earth and Planetary Sciences; Weizmann Institute of Science; Rehovot 7610001 Israel
| | - Brian Berkowitz
- Department of Earth and Planetary Sciences; Weizmann Institute of Science; Rehovot 7610001 Israel
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22
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Jawad A, Chen Z, Yin G. Bicarbonate activation of hydrogen peroxide: A new emerging technology for wastewater treatment. CHINESE JOURNAL OF CATALYSIS 2016. [DOI: 10.1016/s1872-2067(15)61100-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Wu S, Qi Y, Fan C, He S, Dai B, Huang J, Zhou W, Gao L. Application of novel catalytic-ceramic-filler in a coupled system for long-chain dicarboxylic acids manufacturing wastewater treatment. CHEMOSPHERE 2016; 144:2454-2461. [PMID: 26619310 DOI: 10.1016/j.chemosphere.2015.11.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 11/05/2015] [Accepted: 11/06/2015] [Indexed: 06/05/2023]
Abstract
To gain systematic technology for long-chain dicarboxylic acids (LDCA) manufacturing wastewater treatment, catalytic micro-electrolysis (CME) coupling with adsorption-biodegradation sludge (AB) process was studied. Firstly, novel catalytic-ceramic-filler was prepared from scrap iron, clay and copper sulfate solution and packed in the CME reactor. To remove residual n-alkane and LDCA, the CME reactor was utilized for LDCA wastewater pretreatment. The results revealed that about 94% of n-alkane, 98% of LDCA and 84% of chemical oxygen demand (COD) were removed by the aerated CME reactor at the optimum hydraulic retention time (HRT) of 3.0 h. In this process, catalysis from Cu and montmorillonites played an important role in improving the contaminants removal. Secondly, to remove residual COD in the wastewater, AB process was designed for the secondary biological treatment, about 90% of the influent COD could be removed by biosorption, bio-flocculation and biodegradation effects. Finally, the effluent COD (about 150 mg L(-1)) discharged from the coupled CME-AB system met the requirement of the national discharged standard (COD ≤ 300 mg L(-1)). All of these results suggest that the coupled CME-AB system is a promising technology due to its high-efficient performance, and has the potential to be applied for the real LDCA wastewater treatment.
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Affiliation(s)
- Suqing Wu
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Yuanfeng Qi
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China; Shandong ATK Environmental Engineering Company Limited, Jinan 250101, PR China
| | - Chunzhen Fan
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Shengbing He
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China.
| | - Bibo Dai
- Shandong ATK Environmental Engineering Company Limited, Jinan 250101, PR China
| | - Jungchen Huang
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Weili Zhou
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China
| | - Lei Gao
- School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China
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24
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Lin ZR, Zhao L, Dong YH. Quantitative characterization of hydroxyl radical generation in a goethite-catalyzed Fenton-like reaction. CHEMOSPHERE 2015; 141:7-12. [PMID: 26069944 DOI: 10.1016/j.chemosphere.2015.05.066] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 05/18/2015] [Accepted: 05/25/2015] [Indexed: 05/08/2023]
Abstract
In order to find out the truth of influence of solution chemistry on the oxidation efficiency of a goethite-catalyzed Fenton-like reaction, the amount of hydroxyl radicals (OH) was quantified by using coumarin as its trapping agent to produce the only fluorescent derivative 7-hydroxycoumarin (7-HC), because OH was the reactive species responsible for the oxidation activity of Fenton reactions. The concentration of OH achieved maximum at solution pH of 3 and decreased with an increase of solution pH value. However, considerable amount of OH can also generate at near neutral pH (i.e. pH 6 and 7). The concentration of OH was increased both with increasing of goethite and H2O2 dosages, but H2O2 could compete with coumarin to scavenge OH to reduce the formation of 7-HC when the concentration of H2O2 was too high. Anions inhibited OH generation followed an order of H2PO4(-)>SO4(2-)>Cl(-)>NO3(-)>ClO4(-). Higher concentrations of Cl(-) and SO4(2-) resulted in greater inhibition of OH generation. Results of this study demonstrated that the influence of solution chemistry on the oxidation efficiency of the goethite-catalyzed Fenton-like reaction was greatly attributed to the effect of solution chemistry on the amount of OH formed in the process of reaction.
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Affiliation(s)
- Zhi-Rong Lin
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ling Zhao
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Yuan-Hua Dong
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China
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25
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Yan N, Liu F, Xue Q, Brusseau ML, Liu Y, Wang J. Degradation of trichloroethene by siderite-catalyzed hydrogen peroxide and persulfate: Investigation of reaction mechanisms and degradation products. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2015; 274:61-68. [PMID: 26236152 PMCID: PMC4520253 DOI: 10.1016/j.cej.2015.03.056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A binary catalytic system, siderite-catalyzed hydrogen peroxide (H2O2) coupled with persulfate (S2O82-), was investigated for the remediation of trichloroethene (TCE) contamination. Batch experiments were conducted to investigate reaction mechanisms, oxidant decomposition rates, and degradation products. By using high performance liquid chromatography (HPLC) coupled with electron paramagnetic resonance (EPR), we identified four radicals (hydroxyl (HO·), sulfate (SO4-·), hydroperoxyl (HO2·), and superoxide (O2-·)) in the siderite-catalyzed H2O2-S2O82- system. In the absence of S2O82- (i.e., siderite-catalyzed H2O2), a majority of H2O2 was decomposed in the first hour of the experiment, resulting in the waste of HO·. The addition of S2O82- moderated the H2O2 decomposition rate, producing a more sustainable release of hydroxyl radicals that improved the treatment efficiency. Furthermore, the heat released by H2O2 decomposition accelerated the activation of S2O82-, and the resultant SO4-· was the primary oxidative agent during the first two hours of the reaction. Dichloroacetic acid was firstly detected by ion chromatography (IC). The results of this study indicate a new insight to the reaction mechanism for the catalytic binary H2O2-S2O82- oxidant system, and the delineation of radicals and the discovery of the chlorinated byproduct provide useful information for efficient treatment of chlorinated-solvent contamination in groundwater.
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Affiliation(s)
- Ni Yan
- Beijing Key Laboratory of Water Resources and Environmental Engineering/School of Water Resources and Environment, China University of Geosciences, Beijing 100083, PR China
- Hydrology and Water Resources Department, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Building, Tucson, AZ 85721, United States
| | - Fei Liu
- Beijing Key Laboratory of Water Resources and Environmental Engineering/School of Water Resources and Environment, China University of Geosciences, Beijing 100083, PR China
- Corresponding author. Tel.:+ 86 151 20086112; fax: +86 10 8232 1081. (F. Liu)
| | - Qiang Xue
- Beijing Key Laboratory of Water Resources and Environmental Engineering/School of Water Resources and Environment, China University of Geosciences, Beijing 100083, PR China
| | - Mark L. Brusseau
- Hydrology and Water Resources Department, School of Earth and Environmental Sciences, University of Arizona, 429 Shantz Building, Tucson, AZ 85721, United States
| | - Yali Liu
- Beijing Key Laboratory of Water Resources and Environmental Engineering/School of Water Resources and Environment, China University of Geosciences, Beijing 100083, PR China
| | - Junjie Wang
- Development Research Center of the Ministry of Water Resources, Beijing 100038, PR China
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26
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Zhou C, Sun L, Zhang A, Wu X, Ma C, Su S, Hu S, Xiang J. Fe3-xCuxO4 as highly active heterogeneous Fenton-like catalysts toward elemental mercury removal. CHEMOSPHERE 2015; 125:16-24. [PMID: 25655441 DOI: 10.1016/j.chemosphere.2014.12.082] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 11/24/2014] [Accepted: 12/25/2014] [Indexed: 05/21/2023]
Abstract
A series of novel spinel Fe3-xCuxO4 (0<x<0.71) composites, synthesized by chemical co-precipitation method, are proposed synthesized to use as highly active heterogeneous Fenton-like catalysts to remove elemental mercury (Hg0) from the simulated flue gases. Inductively coupled plasma-Atomic emission spectrometry (ICP-AES), X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area, and X-ray photoelectron spectrometer (XPS) were used to characterize the catalysts. The catalysts were confirmed the presence of the redox pairs Fesurf2+/Fesurf3+ and Cusurf+/Cusurf2+ on the surface of the cubic structure. The performance of heterogeneous Fenton-like reactions for Hg0 removal was evaluated in a lab-scale bubbling reactor at the solution temperature of 50°C. The systematic studies on the effects of different catalysts, H2O2 concentration and solution pH values on Hg0 removal efficiencies were performed. The recycling of the Fe3-xCuxO4 catalysts in Fenton-like solution is stable and Hg0 removal efficiency remain above 90% after 3 cycles. The active hydroxyl radical (OH) generated during heterogeneous Fenton-like reactions was confirmed through electron spin resonance (ESR) spin-trapping technique. The Hg0 removal mechanism has been discussed based on the experimental and analytical results.
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Affiliation(s)
- Changsong Zhou
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China
| | - Lushi Sun
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China.
| | - Anchao Zhang
- School of Mechanical and Power Engineering, Henan Polytechnic University, 454000 Jiaozuo, Henan, China
| | - Xiaofeng Wu
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China
| | - Chuan Ma
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China
| | - Sheng Su
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China.
| | - Song Hu
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China
| | - Jun Xiang
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China
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27
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Liu X, Fan JH, Ma LM. Simultaneously degradation of 2,4-dichlorophenol and EDTA in aqueous solution by the bimetallic Cu-Fe/O₂ system. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:1186-1198. [PMID: 25119276 DOI: 10.1007/s11356-014-3372-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 07/22/2014] [Indexed: 06/03/2023]
Abstract
Oxidative degradation of aqueous organic contaminants 2,4-dichlorophenol (2,4-DCP) using ethylenediaminetetraacetic acid (EDTA)-enhanced bimetallic Cu-Fe system in the presence of dissolved oxygen was investigated. The proposed process was applied for the pH range of 3~7 with the degradation efficiency of 2,4-DCP and EDTA varying within 10 %, and achieved at 100 % degradation of 40 mg L(-1) 2,4-DCP in 1 h, at the initial pH of 3, 25 g L(-1) of bimetallic Fe-Cu powder (WCu/WFe = 0.01289) and initial EDTA of 0.57 mM. However, the removal efficiency of 2,4-DCP in control tests were 7.52 % (Cu-Fe/O2 system) and 84.32 % (EDTA-enhanced Fe/O2 process), respectively, after 3 h, reaction. The proposed main mechanism, involves the in situ generation of H2O2 by the electron transfer from Fe(0) to O2 which was enhanced by ethylenediaminetetraacetic acid (EDTA), and the in situ generation of ·OH via advanced oxidation reaction. Accordingly, 2,4-DCP was attacked by ·OH to achieve complete dechlorination and low molecular weight organic acids, even mineralized. Systematic studies on the effects of initial EDTA and 2,4-DCP concentration, Cu-Fe dosing, Cu content, and pH revealed that these effects need to be optimized to avoid the excessive consumption of ·OH and new EDTA and heavy metal Cu pollution.
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Affiliation(s)
- Xin Liu
- National Engineering Research Center for Urban Pollution Control, Tongji University, Shanghai, 200092, China
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28
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Turkay O, Inan H, Dimoglo A. Experimental and theoretical investigations of CuO-catalyzed ozonation of humic acid. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.07.040] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Bokare AD, Choi W. Review of iron-free Fenton-like systems for activating H2O2 in advanced oxidation processes. JOURNAL OF HAZARDOUS MATERIALS 2014; 275:121-35. [PMID: 24857896 DOI: 10.1016/j.jhazmat.2014.04.054] [Citation(s) in RCA: 995] [Impact Index Per Article: 99.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 04/18/2014] [Accepted: 04/23/2014] [Indexed: 05/21/2023]
Abstract
Iron-catalyzed hydrogen peroxide decomposition for in situ generation of hydroxyl radicals (HO(•)) has been extensively developed as advanced oxidation processes (AOPs) for environmental applications. A variety of catalytic iron species constituting metal salts (in Fe(2+) or Fe(3+) form), metal oxides (e.g., Fe2O3, Fe3O4), and zero-valent metal (Fe(0)) have been exploited for chemical (classical Fenton), photochemical (photo-Fenton) and electrochemical (electro-Fenton) degradation pathways. However, the requirement of strict acidic conditions to prevent iron precipitation still remains the bottleneck for iron-based AOPs. In this article, we present a thorough review of alternative non-iron Fenton catalysts and their reactivity towards hydrogen peroxide activation. Elements with multiple redox states (like chromium, cerium, copper, cobalt, manganese and ruthenium) all directly decompose H2O2 into HO(•) through conventional Fenton-like pathways. The in situ formation of H2O2 and decomposition into HO(•) can be also achieved using electron transfer mechanism in zero-valent aluminum/O2 system. Although these Fenton systems (except aluminum) work efficiently even at neutral pH, the H2O2 activation mechanism is very specific to the nature of the catalyst and critically depends on its composition. This review describes in detail the complex mechanisms and emphasizes on practical limitations influencing their environmental applications.
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Affiliation(s)
- Alok D Bokare
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
| | - Wonyong Choi
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea.
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Lin ZR, Ma XH, Zhao L, Dong YH. Kinetics and products of PCB28 degradation through a goethite-catalyzed Fenton-like reaction. CHEMOSPHERE 2014; 101:15-20. [PMID: 24369744 DOI: 10.1016/j.chemosphere.2013.11.063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 11/20/2013] [Accepted: 11/22/2013] [Indexed: 06/03/2023]
Abstract
Efficiencies of 2,4,4'-trichlorobiphenyl (PCB28) degradation in a goethite-catalyzed Fenton-like system under various conditions were investigated. Up to 99% of PCB28 was degraded in the Fenton-like system after 48 h. The hydroxyl radical was responsible for the degradation of PCB28 at pH 3-7. Degradation of PCB28 and H2O2 followed pseudo-first-order kinetics. The rate of PCB28 degradation decreased when the pH increased from 3 to 7, but increased with increasing concentration of goethite and H2O2. The rate of H2O2 decomposition increased at higher pH and goethite concentration, and decreased at lower H2O2 concentration. The half-lives of 4-chlorobiphenyl, 4,4'-dichlorobiphenyl, 2,4,4'-trichlorobiphenyl, and 2,2',4,4'-tetrachlorobiphenyl were 1.8, 3.5, 4.1, and 11h, respectively; therefore, the number of chlorine atoms in the biphenyl molecule determined the chemical reactivity of PCBs. By gas chromatography-mass spectrometry, one monochlorobiphenyl, three dichlorobiphenyl, and two hydroxytrichlorobiphenyl derivatives were identified as major products of PCB28 degradation. The decrease in pH of the reaction mixture after 48h reaction revealed that acidic products might be formed during degradation.
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Affiliation(s)
- Zhi-Rong Lin
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Hong Ma
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Ling Zhao
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Yuan-Hua Dong
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China
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31
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Zou M, Kong Y, Wang J, Wang Q, Wang Z, Wang B, Fan P. Spectroscopic analyses on ROS generation catalyzed by TiO2, CeO2/TiO2 and Fe2O3/TiO2 under ultrasonic and visible-light irradiation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 101:82-90. [PMID: 23099164 DOI: 10.1016/j.saa.2012.09.067] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2012] [Revised: 09/11/2012] [Accepted: 09/22/2012] [Indexed: 06/01/2023]
Abstract
In this work, the TiO2, CeO2/TiO2 and Fe2O3/TiO2 powders were irradiated, respectively, by ultrasound and visible-light, and the generation of reactive oxygen species (ROS) were estimated by the method of Oxidation-Extraction Photometry (OEP). That is, the 1,5-diphenyl carbazide (DPCI) can be oxidized by generated ROS into 1,5-diphenyl carbazone (DPCO), which can be extracted by mixed solvent of benzene and carbon tetrachloride. The DPCO extract liquor displays an obvious absorbance at 563 nm wavelength. In addition, some influencing factors, such as (ultrasonic or visible-light) irradiation time, catalyst addition amount and DPCI concentration, on the generation of ROS were also reviewed. The results indicated that the quantities of generated ROS increase with the increase of (ultrasonic or visible-light) irradiation time and catalyst addition amount. Moreover, the displayed quantities of ROS are also related with DPCI concentration. And then, several radical scavengers were used to determine the kinds of the generated ROS. At last, the researches on the sonocatalytic and photocatalytic degradation of several organic dyes have also been performed. It is wished that this paper might offer some important subjects for broadening the applications of sonocatalytic and photocatalytic technologies in future environment treatment.
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Affiliation(s)
- Mingming Zou
- College of Chemistry, Liaoning University, Shenyang 110036, PR China
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32
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Hammond C, Jenkins RL, Dimitratos N, Lopez-Sanchez JA, ab Rahim MH, Forde MM, Thetford A, Murphy DM, Hagen H, Stangland EE, Moulijn JM, Taylor SH, Willock DJ, Hutchings GJ. Catalytic and mechanistic insights of the low-temperature selective oxidation of methane over Cu-promoted Fe-ZSM-5. Chemistry 2012; 18:15735-45. [PMID: 23150452 DOI: 10.1002/chem.201202802] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Indexed: 11/07/2022]
Abstract
The partial oxidation of methane to methanol presents one of the most challenging targets in catalysis. Although this is the focus of much research, until recently, approaches had proceeded at low catalytic rates (<10 h(-1)), not resulted in a closed catalytic cycle, or were unable to produce methanol with a reasonable selectivity. Recent research has demonstrated, however, that a system composed of an iron- and copper-containing zeolite is able to catalytically convert methane to methanol with turnover frequencies (TOFs) of over 14,000 h(-1) by using H(2)O(2) as terminal oxidant. However, the precise roles of the catalyst and the full mechanistic cycle remain unclear. We hereby report a systematic study of the kinetic parameters and mechanistic features of the process, and present a reaction network consisting of the activation of methane, the formation of an activated hydroperoxy species, and the by-production of hydroxyl radicals. The catalytic system in question results in a low-energy methane activation route, and allows selective C(1)-oxidation to proceed under intrinsically mild reaction conditions.
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Affiliation(s)
- Ceri Hammond
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, UK.
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Neave MJ, Streten-Joyce C, Glasby CJ, McGuinness KA, Parry DL, Gibb KS. The bacterial community associated with the marine polychaete Ophelina sp.1 (Annelida: Opheliidae) is altered by copper and zinc contamination in sediments. MICROBIAL ECOLOGY 2012; 63:639-650. [PMID: 22038035 DOI: 10.1007/s00248-011-9966-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2011] [Accepted: 10/05/2011] [Indexed: 05/31/2023]
Abstract
Tolerant species of polychaete worms can survive in polluted environments using various resistance mechanisms. One aspect of resistance not often studied in polychaetes is their association with symbiotic bacteria, some of which have resistance to metals and may help the organism to survive. We used "next generation" 454 sequencing of bacterial 16S rRNA sequences associated with polychaetes from a copper- and zinc-polluted harbor and from a reference site to determine bacterial community structure. We found changes in the bacteria at the polluted site, including increases in the abundance of bacteria from the order Alteromonadales. These changes in the bacteria associated with polychaetes may be relatively easy to detect and could be a useful indicator of metal pollution.
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Taubert A, Stange F, Li Z, Junginger M, Günter C, Neumann M, Friedrich A. CuO Nanoparticles from the strongly hydrated ionic liquid precursor (ILP) tetrabutylammonium hydroxide: evaluation of the ethanol sensing activity. ACS APPLIED MATERIALS & INTERFACES 2012; 4:791-795. [PMID: 22260332 DOI: 10.1021/am201427q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The sensing potential of CuO nanoparticles synthesized via precipitation from a water/ionic liquid precursor (ILP) mixture was investigated. The particles have a moderate surface area of 66 m(2)/g after synthesis, which decreases upon thermal treatment to below 5 m(2)/g. Transmission electron microscopy confirms crystal growth upon annealing, likely due to sintering effects. The as-synthesized particles can be used for ethanol sensing. The respective sensors show fast response and recovery times of below 10 s and responses greater than 2.3 at 100 ppm of ethanol at 200 °C, which is higher than any CuO-based ethanol sensor described so far.
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Affiliation(s)
- Andreas Taubert
- Institute of Chemistry, University of Potsdam, D-14476 Potsdam, Germany.
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35
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Wang Y, Shi S, Zhu D, Yin G. The oxidative properties of a manganese(iv) hydroperoxide moiety and its relationships with the corresponding manganese(iv) oxo and hydroxo moieties. Dalton Trans 2012; 41:2612-9. [DOI: 10.1039/c2dt11814a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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36
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Lin Z, Chen H, Zhou Y, Ogawa N, Lin JM. Self-catalytic degradation of ortho-chlorophenol with Fenton's reagent studied by chemiluminescence. J Environ Sci (China) 2012; 24:550-557. [PMID: 22655372 DOI: 10.1016/s1001-0742(10)60639-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The degradation of ortho-chlorophenol using Fenton's reagent was studied by chemiluminescence (CL). Without a special CL reagent, a weak CL emission from the mixture of ferrous ion and hydrogen peroxide was observed at room temperature. The CL intensity was increased by the addition of ortho-chlorophenol into the mixed solution. When the temperature was raised to 65 degrees C, the CL intensity was enhanced strongly. The CL mechanisms for the system H2O2-Fe2+ with and without ortho-chlorophenol were studied by examining the CL spectrum, gas chromatography-mass spectrometry and electron spin resonance spectrum. The effects of various free radical scavengers, surfactants and fluorescence compounds on the CL intensity were also investigated. A self-catalytic oxidation mechanism was proposed. The results showed that singlet oxygen was the main emitter for the system H2O2-Fe2+. The strong CL from the system H2O2-Fe(2+)-ortho-chlorophenol was due to singlet oxygen and electronically excited quinone. The benzenediol-like intermediate product formed during the phenol oxidation process greatly promoted the Fenton's reaction and led to higher CL intensity. Chemiluninescence is a novel approach for the investigation of the oxidation of some organic pollutants by Fenton's reagent.
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Affiliation(s)
- Zhen Lin
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China.
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Chen Y, Shi W, Xue H, Han W, Sun X, Li J, Wang L. Enhanced electrochemical degradation of dinitrotoluene wastewater by Sn–Sb–Ag-modified ceramic particulates. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.09.047] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Khachatryan L, Dellinger B. Environmentally persistent free radicals (EPFRs)-2. Are free hydroxyl radicals generated in aqueous solutions? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:9232-9. [PMID: 21942783 PMCID: PMC3236504 DOI: 10.1021/es201702q] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A chemical spin trap, 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), in conjunction with electron paramagnetic resonance (EPR) spectroscopy was employed to measure the production of hydroxyl radical (·OH) in aqueous suspensions of 5% Cu(II)O/silica (3.9% Cu) particles containing environmentally persistent free radicals (EPFRs) of 2-monochlorophenol (2-MCP). The results indicate: (1) a significant differences in accumulated DMPO-OH adducts between EPFR containing particles and non-EPFR control samples, (2) a strong correlation between the concentration of DMPO-OH adducts and EPFRs per gram of particles, and (3) a slow, constant growth of DMPO-OH concentration over a period of days in solution containing 50 μg/mL EPFRs particles + DMPO (150 mM) + reagent balanced by 200 μL phosphate buffered (pH = 7.4) saline. However, failure to form secondary radicals using standard scavengers, such as ethanol, dimethylsulfoxide, sodium formate, and sodium azide, suggests free hydroxyl radicals may not have been generated in solution. This suggests surface-bound, rather than free, hydroxyl radicals were generated by a surface catalyzed-redox cycle involving both the EPFRs and Cu(II)O. Toxicological studies clearly indicate these bound free radicals promote various types of cardiovascular and pulmonary disease normally attributed to unbound free radicals; however, the exact chemical mechanism deserves further study in light of the implication of formation of bound, rather than free, hydroxyl radicals.
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Affiliation(s)
- Lavrent Khachatryan
- Louisiana State University, Department of Chemistry, Baton Rouge, Louisiana 70803, United States
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Li J, Hu Y, Lü W, Shi L, Sun Q, Zhou Y, Xu J, Wang J, Shen B. Efficient oxidative degradation of 2-chlorophenol and 4-chlorophenol over supported CuO-based catalysts. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/s1003-9953(10)60217-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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40
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López-Ayala S, Rincón M. Catalytic and photocatalytic performance of mesoporous CuxO–TiO2. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.05.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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41
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Zhou S, Gu C, Qian Z, Xu J, Xia C. The activity and selectivity of catalytic peroxide oxidation of chlorophenols over Cu–Al hydrotalcite/clay composite. J Colloid Interface Sci 2011; 357:447-52. [DOI: 10.1016/j.jcis.2011.01.099] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 01/11/2011] [Accepted: 01/28/2011] [Indexed: 11/25/2022]
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42
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Maezono T, Tokumura M, Sekine M, Kawase Y. Hydroxyl radical concentration profile in photo-Fenton oxidation process: generation and consumption of hydroxyl radicals during the discoloration of azo-dye Orange II. CHEMOSPHERE 2011; 82:1422-30. [PMID: 21146853 DOI: 10.1016/j.chemosphere.2010.11.052] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Revised: 11/17/2010] [Accepted: 11/17/2010] [Indexed: 05/08/2023]
Abstract
Dynamic behaviors of hydroxyl (OH) radical generation and consumption in photo-Fenton oxidation process were investigated by measuring OH radical concentration during the discoloration of azo-dye Orange II. The effects of operating parameters for photo-Fenton discoloration, i.e. dosages of H(2)O(2) and Fe, initial dye concentration, solution pH and UV irradiation, on the generation and consumption of OH radicals playing the main role in advanced oxidation processes were extensively studied. The scavenger probe or trapping technique in which coumarin is scavenger of OH radical was applied to estimate OH radical concentration in the photoreactor during the photo-Fenton discoloration process. The OH radical generation was enhanced with increasing the dosages of Fenton regents, H(2)O(2) and Fe. At the initial stage of photo-Fenton discoloration of Orange II, the OH radical concentration rapidly increased (Phase-I) and the OH radical concentration decreased after reaching of OH radical concentration at maximum value (Phase-II). The decrease in OH radical concentration started when the complete discoloration of Orange II was nearly achieved and the H(2)O(2) concentration became rather low. The dynamic behavior of OH radical concentration during the discoloration of Orange II was found to be strongly linked with the change in H(2)O(2) concentration. The generation of OH radical was maximum at solution pH of 3.0 and decreased with an increase of solution pH. The OH radical generation rate in the Fenton Process was rather slower than that in the photo-Fenton process.
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Affiliation(s)
- Takuya Maezono
- Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama 350-8585, Japan
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Eren Z, Ince NH. Sonolytic and sonocatalytic degradation of azo dyes by low and high frequency ultrasound. JOURNAL OF HAZARDOUS MATERIALS 2010; 177:1019-1024. [PMID: 20106593 DOI: 10.1016/j.jhazmat.2010.01.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2009] [Revised: 12/09/2009] [Accepted: 01/06/2010] [Indexed: 05/28/2023]
Abstract
The study describes degradation of two azo dyes at low and high frequency ultrasound (US) to compare their reactivity and to assess the impacts of frequency, OH, chemical structure and soluble/nonsoluble additives. Low frequency US alone was found totally ineffective for bleaching the dyes even after 2-h irradiation, while high frequency provided significant color decay in 30-min contact. The result was attributed to larger number of oscillations at high frequency that allowed a larger fraction of OH ejection to the bulk liquid. The difference in the rates of dye degradation was due to different substituents around the azo bonds that dictated the reactivities of the dyes with OH and other species. The performance of low frequency US was remarkably improved and exceeded that of high frequency in the presence of CCl(4), nano-sized TiO(2) and zero-valent copper. The effect was attributed to the advantage of low frequency for long bubble-life time, high collapse temperatures, turbulent flow conditions and high sonoluminescence intensity. The efficacies of the additives in terms of the reduction in dye concentration per unit mass of additive were: TiO(2)>CCl(4)>Cu, regardless of the dye structure and the operation frequency. Much better performance of TiO(2) than Cu was attributed to its larger surface area with a slight positive charge on it and to the effect of stable sonoluminescence that may have induced photocatalytic properties on semiconductor surface.
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Affiliation(s)
- Zeynep Eren
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, 61801 IL, USA
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Nieto-Juarez JI, Pierzchła K, Sienkiewicz A, Kohn T. Inactivation of MS2 coliphage in Fenton and Fenton-like systems: role of transition metals, hydrogen peroxide and sunlight. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:3351-6. [PMID: 20356037 DOI: 10.1021/es903739f] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The inactivation of coliphage MS2 by iron- and copper-catalyzed Fenton systems was studied to assess the importance of this process for virus inactivation in natural systems and during water treatment by advanced oxidation processes. The influence of H(2)O(2) (3-50 microM) and metal (1-10 microM) concentrations, HO(*) production, and sunlight on inactivation was investigated. Inactivation was first order with respect to H(2)O(2), but the dependence on the metal concentration was more complex. In the Cu/H(2)O(2) system, the inactivation rate constant k(obs) increased with added Cu up to 2.5 microM, and then leveled off. This was consistent with Cu saturation of the solution, indicating that only soluble Cu contributed to inactivation. In contrast, inactivation in the Fe/H(2)O(2) system was governed by colloidal iron. Irradiation by sunlight only affected the Fe/H(2)O(2) system, leading to a 5.5-fold increase in k(obs) (up to 3.1 min(-1)). HO(*) production, measured by electron spin resonance, could not account for the observed inactivation in the Fe/H(2)O(2) system. Other oxidants, such as ferryl species, must therefore play a role. Experiments using bulk oxidant scavengers revealed that inactivation occurred by a caged mechanism involving oxidant production by metals located in close proximity to the virus. Overall, our results show that the Fenton/photo-Fenton process may serve as an efficient technology for virus disinfection.
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45
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Liang C, Su HW. Identification of Sulfate and Hydroxyl Radicals in Thermally Activated Persulfate. Ind Eng Chem Res 2009. [DOI: 10.1021/ie9002848] [Citation(s) in RCA: 855] [Impact Index Per Article: 57.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chenju Liang
- Department of Environmental Engineering, National Chung Hsing University, 250 Kuo-kuang Road, Taichung 402, Taiwan
| | - Hsin-Wey Su
- Department of Environmental Engineering, National Chung Hsing University, 250 Kuo-kuang Road, Taichung 402, Taiwan
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46
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Phenol degradation using 20, 300 and 520kHz ultrasonic reactors with hydrogen peroxide, ozone and zero valent metals. Sep Purif Technol 2009. [DOI: 10.1016/j.seppur.2009.03.035] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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