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Hernández-Freyle C, Castilla-Acevedo SF, Harders AN, Acosta-Herazo R, Acuña-Bedoya JD, Santoso M, Torres-Ceron DA, Amaya-Roncancio S, Mueses MA, Machuca-Martínez F. Ultraviolet activation of monochloramine to treat contaminants of emerging concern: reactions, operating parameters, byproducts, and opportunities. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:40758-40777. [PMID: 38819507 DOI: 10.1007/s11356-024-33681-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 05/10/2024] [Indexed: 06/01/2024]
Abstract
The presence of CECs in aquatic systems has raised significant concern since they are potentially harmful to the environment and human health. Eliminating CECs has led to the development of alternatives to treat wastewater, such as advanced oxidation processes (AOPs). The ultraviolet-mediated activation of monochloramine (UV/NH2Cl) is a novel and relatively unexplored AOPs for treating pollutants in wastewater systems. This process involves the production of amino radicals (•NH2) and chlorine radicals (Cl•) from the UV irradiation of NH2Cl. Studies have demonstrated its effectiveness in mitigating various CECs, exhibiting advantages, such as the potential to control the amount of toxic disinfection byproducts (TDBPs) formed, low costs of reagents, and low energy consumption. However, the strong influence of operating parameters in the degradation efficiency and existence of NH2Cl, the lack of studies of its use in real matrices and techno-economic assessments, low selectivity, and prolonged treatment periods must be overcome to make this technology more competitive with more mature AOPs. This review article revisits the state-of-the-art of the UV/NH2Cl technology to eliminate pharmaceutical and personal care products (PPCPs), micropollutants from the food industry, pesticides, and industrial products in aqueous media. The reactions involved in the production of radicals and the influence of operating parameters are covered to understand the formation of TDBPs and the main challenges and limitations of the UV/NH2Cl to degrade CECs. This review article generates critical knowledge about the UV/NH2Cl process, expanding the horizon for a better application of this technology in treating water contaminated with CECs.
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Affiliation(s)
- Carlos Hernández-Freyle
- Natural and Exact Sciences Department, Universidad de La Costa, Calle 58 #55 - 66, 080002, Barranquilla, Colombia
| | - Samir F Castilla-Acevedo
- Natural and Exact Sciences Department, Universidad de La Costa, Calle 58 #55 - 66, 080002, Barranquilla, Colombia.
- Chemical & Petroleum Engineering Department, The University of Kansas, Lawrence, KS, 66047, USA.
| | - Abby N Harders
- Chemical & Petroleum Engineering Department, The University of Kansas, Lawrence, KS, 66047, USA
| | - Raúl Acosta-Herazo
- Photocatalysis and Solar Photoreactors Engineering, Modeling & Applications of Advanced Oxidation Technologies, Department of Chemical Engineering, Universidad de Cartagena, Zip code 1382 - Postal 195, Cartagena, Colombia
- Centro de Desarrollo Tecnológico en Ingeniería Sostenible, Laboratorio de Simulación y Procesos - Simprolab, Turbaco, Colombia
| | - Jawer D Acuña-Bedoya
- Faculty of Chemical Sciences, Universidad Autónoma de Nuevo León, Ciudad Universitaria, Av. Universidad S/N. C. P., 66455, San Nicolás de los Garza, Nuevo León, México
| | - Melvin Santoso
- Chemical & Petroleum Engineering Department, The University of Kansas, Lawrence, KS, 66047, USA
| | - Darwin A Torres-Ceron
- Laboratorio de Física del Plasma, Universidad Nacional de Colombia Sede Manizales, 170003, Manizales, Colombia
- Departamento de Física, Universidad Tecnológica de Pereira (UTP), 660003, Pereira, Colombia
- Gestión & Medio Ambiente, 170004, Manizales, Colombia
| | - Sebastián Amaya-Roncancio
- Natural and Exact Sciences Department, Universidad de La Costa, Calle 58 #55 - 66, 080002, Barranquilla, Colombia
| | - Miguel A Mueses
- Photocatalysis and Solar Photoreactors Engineering, Modeling & Applications of Advanced Oxidation Technologies, Department of Chemical Engineering, Universidad de Cartagena, Zip code 1382 - Postal 195, Cartagena, Colombia
| | - Fiderman Machuca-Martínez
- Escuela de Ingeniería Química, CENM, Universidad del Valle, Calle 13 #100-00, 76001 GAOX, Cali, Colombia
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2
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Galodiya MN, Chakma S. Immobilization of enzymes on functionalized cellulose nanofibrils for bioremediation of antibiotics: Degradation mechanism, kinetics, and thermodynamic study. CHEMOSPHERE 2024; 349:140803. [PMID: 38040249 DOI: 10.1016/j.chemosphere.2023.140803] [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: 08/01/2023] [Revised: 11/17/2023] [Accepted: 11/22/2023] [Indexed: 12/03/2023]
Abstract
The deteriorating environmental conditions due to increasing emerging recalcitrant pollutants raised a severe concern for its remediation. In this study, we have reported antibiotic degradation using free and immobilized HRP. The functionalized cellulose support was utilized for efficient immobilization of HRP. Approximately 13.32 ± 0.52 mg/g enzyme loading was achieved with >99% immobilization efficiency. The higher percentage of immobilization is attributed to the higher surface area and carboxylic groups on the support. The kinetic parameter of immobilized enzymes was Km = 2.99 mM/L for CNF-CA@HRP, which is 3.5-fold more than the Michaelis constant (Km = 0.84794 mM/L) for free HRP. The Vmax of CNF-CA@HRP bioconjugate was 2.36072 mM/min and 0.558254 mM/min for free HRP. The highest degradation of 50, 54.3, and 97% were achieved with enzymatic, sonolysis, and sono-enzymatic with CNF-CA@HRP bioconjugate, respectively. The reaction kinetics analysis revealed that applying ultrasound with an enzymatic process could enhance the reaction rate by 2.7-8.4 times compared to the conventional enzymatic process. Also, ultrasound changes the reaction from diffusion mode to the kinetic regime with a more oriented and fruitful collision between the molecules. The thermodynamic analysis suggested that the system was endothermic and spontaneous. While LC-MS analysis and OTC's degradation mechanism suggest, it mainly involves hydroxylation, secondary alcohol oxidation, dehydration, and decarbonylation. Additionally, the toxicity test confirmed that the sono-enzymatic process helps toward achieving complete mineralization. Further, the reusability of bioconjugate shows that immobilized enzymes are more efficient than the free enzyme.
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Affiliation(s)
- Manju Nagar Galodiya
- Department of Chemical Engineering, Indian Institute of Science Education and Research Bhopal, Bhopal, 462 066, Madhya Pradesh, India
| | - Sankar Chakma
- Department of Chemical Engineering, Indian Institute of Science Education and Research Bhopal, Bhopal, 462 066, Madhya Pradesh, India.
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3
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Orudzhev FF, Sobola DS, Ramazanov SM, Častková K, Selimov DA, Rabadanova AA, Shuaibov AO, Gulakhmedov RR, Abdurakhmanov MG, Giraev KM. Hydrogen Bond-Induced Activation of Photocatalytic and Piezophotocatalytic Properties in Calcium Nitrate Doped Electrospun PVDF Fibers. Polymers (Basel) 2023; 15:3252. [PMID: 37571146 PMCID: PMC10422511 DOI: 10.3390/polym15153252] [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: 06/27/2023] [Revised: 07/26/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
In this study, polyvinylidene fluoride (PVDF) fibers doped with hydrated calcium nitrate were prepared using electrospinning. The samples were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), optical spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR), Raman, and photoluminescence (PL) spectroscopy. The results are complementary and confirm the presence of chemical hydrogen bonding between the polymer and the dopant. Additionally, there was a significant increase in the proportion of the electroactive polar beta phase from 72 to 86%. It was shown that hydrogen bonds acted as a transport pathway for electron capture by the conjugated salt, leading to more than a three-fold quenching of photoluminescence. Furthermore, the optical bandgap of the composite material narrowed to the range of visible light energies. For the first time, it the addition of the salt reduced the energy of the PVDF exciton by a factor of 17.3, initiating photocatalytic activity. The calcium nitrate-doped PVDF exhibited high photocatalytic activity in the degradation of methylene blue (MB) under both UV and visible light (89 and 44%, respectively). The reaction rate increased by a factor of 2.4 under UV and 3.3 under visible light during piezophotocatalysis. The catalysis experiments proved the efficiency of the membrane design and mechanisms of catalysis are suggested. This study offers insight into the nature of chemical bonds in piezopolymer composites and potential opportunities for their use.
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Affiliation(s)
- F. F. Orudzhev
- Smart Materials Laboratory, Dagestan State University, St. M. Gadjieva 43-a, 367015 Makhachkala, Russia
| | - D. S. Sobola
- Central European Institute of Technology BUT, Purkyňova 656/123, 61200 Brno, Czech Republic
- Department of Physics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technická 2848/8, 61600 Brno, Czech Republic
| | - Sh. M. Ramazanov
- Amirkhanov Institute of Physics, Dagestan Federal Research Center, Russian Academy of Sciences, 367003 Makhachkala, Russia
| | - K. Častková
- Central European Institute of Technology BUT, Purkyňova 656/123, 61200 Brno, Czech Republic
| | - D. A. Selimov
- Smart Materials Laboratory, Dagestan State University, St. M. Gadjieva 43-a, 367015 Makhachkala, Russia
| | - A. A. Rabadanova
- Smart Materials Laboratory, Dagestan State University, St. M. Gadjieva 43-a, 367015 Makhachkala, Russia
| | - A. O. Shuaibov
- Smart Materials Laboratory, Dagestan State University, St. M. Gadjieva 43-a, 367015 Makhachkala, Russia
| | - R. R. Gulakhmedov
- Smart Materials Laboratory, Dagestan State University, St. M. Gadjieva 43-a, 367015 Makhachkala, Russia
| | - M. G. Abdurakhmanov
- Smart Materials Laboratory, Dagestan State University, St. M. Gadjieva 43-a, 367015 Makhachkala, Russia
| | - K. M. Giraev
- Smart Materials Laboratory, Dagestan State University, St. M. Gadjieva 43-a, 367015 Makhachkala, Russia
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Dolatabadi M, Ehrampoush MH, Pournamdari M, Ebrahimi AA, Fallahzadeh H, Ahmadzadeh S. Enhanced electrocatalytic elimination of fenitrothion, trifluralin, and chlorothalonil from groundwater and industrial wastewater using modified Cu-PbO2 electrode. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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5
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Zhou L, Wang S, Zheng M, Han J, Liu R, Lewis A, Huang Y, Yun J. Efficient mineralization of organic pollutants in water via a phenol-responsive catalytic ozonation process. J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2023.104804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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6
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Hybrid technology combining hydrodynamic cavitation and oxidative processes to degrade surfactants from a real effluent. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1007/s43153-022-00285-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Wang P, Lou X, Chen Q, Liu Y, Sun X, Guo Y, Zhang X, Wang R, Wang Z, Chen S, Zhang L, Zhang RQ, Guan J. Spent LiFePO 4: An old but vigorous peroxymonosulfate activator for degradation of organic pollutants in water. ENVIRONMENTAL RESEARCH 2022; 214:113780. [PMID: 35779620 DOI: 10.1016/j.envres.2022.113780] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/22/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
Iron-based catalysts have been demonstrated to activate peroxymonosulfate (PMS) to generate reactive radicals, which is however limited by their complex preparation process, high costs and inefficiency for practical applications. Herein we obtain spent LiFePO4 (SLFP), with powerful catalytic capacity by a simple one-step treatment of the retired LiFePO4 cathode material, for PMS activation to decontaminate organic pollutants. Lithium defects and oxygen vacancies in SLFP play critical roles for PMS utilization, further confirmed by density functional theory (DFT) calculations. SLFP materials rapidly adsorb PMS, and the surface PMS is activated by Fe(II) to generate radicals, with •OH playing a major role for the degradation of organics after multi-step reactions. The SLFP/PMS process is finally validated for ability to remove organic contaminants and potential environmental application.
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Affiliation(s)
- Pu Wang
- Shanghai Collaborative Innovation Centre for WEEE Recycling, School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Xiaoyi Lou
- Laboratory of Quality Safety and Processing for Aquatic Product, East Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 200090, China
| | - Qianqian Chen
- Shanghai Collaborative Innovation Centre for WEEE Recycling, School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Yujing Liu
- Shanghai Collaborative Innovation Centre for WEEE Recycling, School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Xiaohu Sun
- Shanghai Collaborative Innovation Centre for WEEE Recycling, School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Yaoguang Guo
- Shanghai Collaborative Innovation Centre for WEEE Recycling, School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, 201209, China.
| | - Xiaojiao Zhang
- Shanghai Collaborative Innovation Centre for WEEE Recycling, School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Ruixue Wang
- Shanghai Collaborative Innovation Centre for WEEE Recycling, School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Zhaohui Wang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, China; Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources, 3663 N. Zhongshan Road, Shanghai, 200062, China; Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, Shanghai, 200241, China
| | - Shuai Chen
- Shanghai Collaborative Innovation Centre for WEEE Recycling, School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Li Zhang
- Shanghai Collaborative Innovation Centre for WEEE Recycling, School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, 201209, China
| | - Rui-Qin Zhang
- Department of Physics, City University of Hong Kong, Hong Kong SAR, 999077, China
| | - Jie Guan
- Shanghai Collaborative Innovation Centre for WEEE Recycling, School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, 201209, China.
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8
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Son Y, Seo J. Effects of gas saturation and sparging on sonochemical oxidation activity in open and closed systems, Part I: H 2O 2 generation. ULTRASONICS SONOCHEMISTRY 2022; 90:106214. [PMID: 36327919 PMCID: PMC9636189 DOI: 10.1016/j.ultsonch.2022.106214] [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: 08/26/2022] [Revised: 10/10/2022] [Accepted: 10/27/2022] [Indexed: 06/01/2023]
Abstract
Cavitational/sonochemical activity can be significantly enhanced or reduced depending on the gases dissolved in the liquid. Although many researchers have suggested the order of importance of dissolved gas conditions that affect the degree of sonoluminescence (SL), sonochemiluminescence (SCL), and compound degradation, the most suitable gas condition for sonochemical oxidation reactions is currently unknown. In this study (Part I), the effects of gas saturation and sparging on the generation of H2O2 were investigated in a 28-kHz sonoreactor system. Four gas modes, saturation/closed, saturation/open, sparging/closed, and sparging/open, were applied to Ar, O2, N2, and binary gas mixtures. The change in dissolved oxygen (DO) concentration during ultrasonic irradiation was measured and was used as an indicator of whether the gaseous exchange between liquid and air altered the gas content of the liquid. Considerable difference in the DO concentration was observed for the gas saturation/open mode, ranging from -11.5 mg/L (O2 100 %) to +4.3 mg/L (N2 100 %), while no significant difference was observed in the other gas modes. The change in the gas content significantly reduced the linearity for H2O2 generation, which followed pseudo-zero-order kinetics, and either positively or negatively affected H2O2 generation. Ar:O2 (75:25) and Ar:O2 (50:50) resulted in the highest and second-highest H2O2 generation for both gas saturation and sparging, respectively. In addition, gas sparging resulted in much higher H2O2 generation for all gas conditions compared to gas saturation; this was because of the significant change in the cavitational active zone and concentrated ultrasonic energy, which formed a bulb-shaped active zone, especially for the Ar/O2 mixtures adjacent to the transducer at the bottom. The sparging flow rate and position also significantly affected H2O2 generation; the highest H2O2 generation was obtained when the sparger was placed at the bottom adjacent to the transducer, with a flow rate of 3 L/min. In Part II, the generation of nitrogen oxides, including nitrite (NO2-) and nitrate (NO3-), was investigated using the same ultrasonic system with three gas modes: saturation/open, saturation/closed, and sparging/closed.
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Affiliation(s)
- Younggyu Son
- Department of Environmental Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea; Department of Energy Engineering Convergence, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea.
| | - Jieun Seo
- Department of Environmental Engineering, Kumoh National Institute of Technology, Gumi 39177, Republic of Korea; Environment Research Division, Gyeongsangbuk-do Government Public Institute of Health & Environment, Yeongcheon 38874, Republic of Korea
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9
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Bettman N, Alam R, Patterson-Fortin L, Asadi M, McPhedran K. Optimization and assessment of an electrochemical advanced oxidation system for synthetic stormwater treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:81505-81519. [PMID: 35729396 DOI: 10.1007/s11356-022-21390-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
Electrochemical advanced oxidation processes (eAOPs) such as the current advanced oxidation system (AOS) are a type of electrochemical wastewater treatment that creates oxidative species, such as iodide species, chloride species, and hydroxyl radicals, that can treat even the most recalcitrant contaminants. It is important to determine the concentrations and locations of oxidative species in eAOPs for optimization of the wastewater treatment process. In this study, a spectrophotometric methodology was used to determine concentrations of iodide and chloride oxidative species (starting at 10, 25, and 50 ppm) within an AOS under various input voltages (6, 12, and 24 V). Overall, it was found that iodate and chlorite were the dominant species created in their respective treatments. Additionally, the concentration of iodide oxidative species increased with increasing voltage, whereas the chloride species decreased with increasing voltage. The optimal conditions for the efficient creation of AOS oxidative species were 12 V and 10 ppm potassium iodide and 6 V and 10 ppm sodium chloride, respectively. In addition, the use of iodide is recommended for wastewater treatment using the AOS to effectively create oxidative species. Following optimization, the AOS performance was tested for synthetic stormwater. Results indicated that the AOS performed well for reduction of Escherichia coli; however, reduction of other contaminants was inconsistent as would be expected given the AOS was optimized for disinfection, not decontamination. Further AOS optimization for decontamination would be expected to result in improved decontamination performance.
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Affiliation(s)
- Nathan Bettman
- Department of Civil, Geological & Environmental Engineering, University of Saskatchewan, Engineering Building, 57 Campus Dr. Saskatoon, Saskatoon, SK, S7N 5A9, Canada
| | - Raquibul Alam
- Department of Civil, Geological & Environmental Engineering, University of Saskatchewan, Engineering Building, 57 Campus Dr. Saskatoon, Saskatoon, SK, S7N 5A9, Canada
| | | | - Mohsen Asadi
- Department of Civil, Geological & Environmental Engineering, University of Saskatchewan, Engineering Building, 57 Campus Dr. Saskatoon, Saskatoon, SK, S7N 5A9, Canada
| | - Kerry McPhedran
- Department of Civil, Geological & Environmental Engineering, University of Saskatchewan, Engineering Building, 57 Campus Dr. Saskatoon, Saskatoon, SK, S7N 5A9, Canada.
- Global Institute for Water Security, University of Saskatchewan, Saskatoon, SK, Canada.
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10
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Rivas FJ. Monopersulfate in water treatment: Kinetics. JOURNAL OF HAZARDOUS MATERIALS 2022; 430:128383. [PMID: 35176700 DOI: 10.1016/j.jhazmat.2022.128383] [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: 10/29/2021] [Revised: 12/22/2021] [Accepted: 01/26/2022] [Indexed: 06/14/2023]
Abstract
The kinetics of monopersulfate based systems in the elimination of potential harmful contaminants has been assessed from a theoretical point of view. A detailed reaction mechanism sustained in the generation of radicals (mainly hydroxyl and sulfate), propagation and termination stages has been proposed. The system of first order differential equations derived has numerically been solved. The effect of main influencing parameters such as contaminant and peroxymonosulfate initial concentrations, intermediate generation, presence of organic matter, role played by anions, has been theoretically obtained. Discussion of simulated results has been accomplished by comparison with experimental data found in the literature. At the sight of the theoretical and empirical data, use of simplistic pseudo first order kinetics is discouraged. Despite considering a significant number of elemental reactions, modelling of the system reveals that a high fraction of them can be neglected due to their insignificant role played in the mechanism. The entire mechanism has been tested when peroxymonosulfate has been activated by UV radiation, although results can be fairly extrapolated to other activation strategies. Finally, a generic model capable of accounting for the effect of a diversity of parameters is proposed. No theoretical background is behind the model, however the generic model clearly improves the results obtained by simple first order kinetics.
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Affiliation(s)
- F Javier Rivas
- Departamento de Ingeniería química y química física, IACYS,Universidad de Extremadura, Av. Elvas s/n, 06006 Badajoz, Spain
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11
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One-Step Synthesis of Iron and Titanium-Based Compounds Using Black Mineral Sands and Oxalic Acid under Subcritical Water Conditions. MINERALS 2022. [DOI: 10.3390/min12030306] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Black mineral sands are widely used to obtain titanium dioxide, titanium, and, more recently, a variety of iron–titanium oxide nanostructures. Highly corrosive mineral acids or alkalis are commonly employed for this purpose. Hence, it is desirable to find eco-friendly ways to process these minerals, deriving high-added value materials. In this study, an Ecuadorian mineral sand precursor (0.6FeTiO3∙0.4Fe2O3 solid solution) was treated with oxalic acid aqueous solutions under subcritical water conditions. The synthesis was conducted in a batch reactor operating at 155 °C, 50 bar, and 700 rpm for 12 h, varying the oxalic acid concentration (0.1, 0.5 to 1.0 M). The as-obtained compounds were physically separated, dried, and analyzed by X-ray powder diffraction, scanning electron microscopy, and Raman spectroscopy. The characterization showed that the precursor was completely converted into two main products, ferrous oxalate, and titanium dioxide polymorphs. Rutile was always found in the as-synthesized products, while anatase only crystallized with high oxalic acid concentrations (0.5 and 1.0 M). These results open the possibility to develop more sustainable routes to synthesize iron and titanium-based materials with promising applications.
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12
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Tian Y, Jia N, Zhou L, Lei J, Wang L, Zhang J, Liu Y. Photo-Fenton-like degradation of antibiotics by inverse opal WO 3 co-catalytic Fe 2+/PMS, Fe 2+/H 2O 2 and Fe 2+/PDS processes: A comparative study. CHEMOSPHERE 2022; 288:132627. [PMID: 34678345 DOI: 10.1016/j.chemosphere.2021.132627] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/04/2021] [Accepted: 10/18/2021] [Indexed: 06/13/2023]
Abstract
Advanced oxidation processes (AOPs) such as Fenton and Fenton-like process for pollutant removal have been widely reported. However, most papers choose one of the popular oxidants (H2O2, peroxymonosulfate (PMS) or peroxydisulfate (PDS)) as the oxidant via AOPs for pollutant degradation. The purpose of this work is to compare the degradation rates of the Fe2+/PMS, Fe2+/H2O2 and Fe2+/PDS processes. Furthermore, to solve the problem of slow regeneration of Fe2+, the visible light irradiation and inverse opal WO3 cocatalyst were added to the Fenton/Fenton-like process. The IO WO3 co-catalytic visible light assisted Fe2+/PMS, Fe2+/H2O2 and Fe2+/PDS processes greatly improved the degradation efficiency of norfloxacin (NOR), reaching about 30 times, 9 times and 12 times that of the homogeneous Fenton/Fenton-like process, respectively. On average, the TOC removal rates of PMS-based, H2O2-based and PMS-based processes for the five pollutants were 71.6%, 54.0%, and 59.6% within 60 min, and the corresponding co-catalyst treatment efficiencies were 0.215 mmol/g/h, 0.162 mmol/g/h, and 0.179 mmol/g/h, respectively. 1O2 and •O2- have been proven to play a vital role in the degradation of NOR via all the three IO WO3 co-catalytic photo-Fenton-like processes. In addition, the effects of different reaction parameters on the activity of degrading norfloxacin were explored. The IO WO3 co-catalytic visible light assisted Fe2+/PMS, Fe2+/H2O2 and Fe2+/PDS processes for removal of different persistent organic pollutants and norfloxacin in different actual wastewater have also been studied. Nonetheless, this study proves that IO WO3 co-catalytic visible light assisted Fe2+/PMS, Fe2+/H2O2 and Fe2+/PDS processes could effectively remove antibiotics from wastewater.
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Affiliation(s)
- Yunhao Tian
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Nan Jia
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China
| | - Liang Zhou
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China
| | - Juying Lei
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China; Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, PR China.
| | - Lingzhi Wang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China; Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China
| | - Jinlong Zhang
- State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China; Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China
| | - Yongdi Liu
- National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, PR China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, PR China
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17α-Ethinylestradiol elimination using synthesized and dense nanocomposite materials: Mechanism and real matrix treatment. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-021-0958-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Zheng K, Chen J, Gao X, Cao X, Wu S, Su J. Photocatalytic degradation of tetracycline by Phosphorus-doped carbon nitride tube combined with peroxydisulfate under visible light irradiation. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 84:1919-1929. [PMID: 34695020 DOI: 10.2166/wst.2021.376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photocatalysis has been regarded as a kind of environmentally friendly advanced oxidation process to eliminate pollutants. In this work, Phosphorus-doped carbon nitride tube (PCN) was synthesized via a hydrothermal calcination method and applied to degrade tetracycline (TC) through combing with peroxydisulfate (PDS) under visible light irradiation. Experimental results showed that the optimized catalysts PCN-5 exhibited superior degradation performance and reusability for TC degradation. 96.4% TC could be degraded for optimal PCN-5 with 0.3 g·L-1 catalysts and 1.0 g·L-1 PDS under visible light within 60 min. In addition, the degradation rate constant for TC of PCN + PDS + Vis system was still above 85% after five uses. Radical trapping experiment indicating that O2·- is the dominant radical for TC degradation. The findings of this work revealed the potential application of the PCN + PDS + Vis system toward degrading contaminants in wastewater.
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Affiliation(s)
- Kai Zheng
- School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China E-mail: ; These authors contributed equally to the work
| | - Jianan Chen
- School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China E-mail: ; Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China; These authors contributed equally to the work
| | - Xue Gao
- School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China E-mail:
| | - Xiaoqing Cao
- School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China E-mail:
| | - Shan Wu
- School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China E-mail:
| | - Jixin Su
- School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China E-mail:
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Chakrabarty S, Upadhyay P, Chakma S. Experimental and theoretical study of deep oxidative desulfurization of Dibenzothiophene using Oxalate-Based catalyst. ULTRASONICS SONOCHEMISTRY 2021; 75:105580. [PMID: 33991773 PMCID: PMC8135043 DOI: 10.1016/j.ultsonch.2021.105580] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 03/21/2021] [Accepted: 04/26/2021] [Indexed: 06/01/2023]
Abstract
The present study reports the experimental and theoretical investigation for production of ultra-low sulfur liquid fuels through estimation of various reactive species formed during the reaction with the help of simulation. All the experiments were performed using an ultrasound bath which operates at a frequency of 37 kHz and a theoretical power of 95 W. The presented oxalate-based technique is found to be more efficient with > 93% DBT oxidation within 15 min of reaction time at 25 °C due to formation of reactive species like FeIIC2O4 and [Formula: see text] which accelerate the reaction kinetics. Moreover, we have also investigated the influence of process parameters such as molar ratio of C2O42-/Fe2 +, oxidant concentration, volume ratio of organic to aqueous phase, sulfur concentration, and activation methods of oxidant. The results revealed that catalyst can be reused for several runs without decrease in catalytic activity. The experimental and simulation of cavitation bubble dynamics results revealed that sonochemical effect assists to accelerate the reaction kinetics through formation of free radicals (•O, •H, •OH and HO2∙) and other reactive species like O3 and H2O2 generated during transient cavitation. The sono-physical effects of cavitation help to create a fine emulsion in the liquid-liquid heterogeneous system leading to enhanced mass transfer rate by providing more interfacial surface area for occurring chemical reaction.
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Affiliation(s)
- Satadru Chakrabarty
- Department of Chemical Engineering, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
| | - Prachi Upadhyay
- Department of Chemical Engineering, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India
| | - Sankar Chakma
- Department of Chemical Engineering, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, Madhya Pradesh, India.
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