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Hu X, Zhu M. Were Persulfate-Based Advanced Oxidation Processes Really Understood? Basic Concepts, Cognitive Biases, and Experimental Details. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:10415-10444. [PMID: 38848315 DOI: 10.1021/acs.est.3c10898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
Persulfate (PS)-based advanced oxidation processes (AOPs) for pollutant removal have attracted extensive interest, but some controversies about the identification of reactive species were usually observed. This critical review aims to comprehensively introduce basic concepts and rectify cognitive biases and appeals to pay more attention to experimental details in PS-AOPs, so as to accurately explore reaction mechanisms. The review scientifically summarizes the character, generation, and identification of different reactive species. It then highlights the complexities about the analysis of electron paramagnetic resonance, the uncertainties about the use of probes and scavengers, and the necessities about the determination of scavenger concentration. The importance of the choice of buffer solution, operating mode, terminator, and filter membrane is also emphasized. Finally, we discuss current challenges and future perspectives to alleviate the misinterpretations toward reactive species and reaction mechanisms in PS-AOPs.
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Affiliation(s)
- Xiaonan Hu
- Guangdong Key Laboratory of Environmental Pollution and Health, College of Environment and Climate, Jinan University, Guangzhou 511443, PR China
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, Innovation Institute of Carbon Neutrality, Research Center of Nano Science and Technology, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Mingshan Zhu
- Guangdong Key Laboratory of Environmental Pollution and Health, College of Environment and Climate, Jinan University, Guangzhou 511443, PR China
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2
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Joksimoski S, Kerpen K, Telgheder U. Advanced remediation in the presence of ferrous iron and carbonate-containing water by oxygen-induced oxidation of organic contaminants. CHEMOSPHERE 2024; 356:141856. [PMID: 38582171 DOI: 10.1016/j.chemosphere.2024.141856] [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: 12/19/2023] [Revised: 02/27/2024] [Accepted: 03/28/2024] [Indexed: 04/08/2024]
Abstract
Mechanistic investigations of an environmentally friendly and easy-to-implement oxidation method in the remediation of contaminated anoxic waters, i.e. groundwater, through the sole use of oxygen for the oxygen-induced oxidation of pollutants were the focus of this work. This was achieved by the addition of O2 under anoxic conditions in the presence of ferrous iron which initiated the ferrous oxidation and the simultaneous formation of reactive •OH radicals. The involvement of inorganic ligands such as carbonates in the activation of oxygen as part of the oxidation of Fe2+ in water was investigated, too. The formation of •OH radicals, was confirmed in two different, indirect approaches by a fluorescence-based method involving coumarin as •OH scavenger and by the determination of the oxidation products of different aromatic VOCs. In the latter case, the oxidation products of several typical aromatic groundwater contaminants such as BTEX (benzene, toluene, ethylbenzene, xylenes), indane and ibuprofen, were determined. The influence of other ligands in the absence of bicarbonate and the effect of pH were also addressed. The possibility of activation of O2 in carbonate-rich water i.e. groundwater, may also potentially contribute to oxidation of groundwater contaminants and support other primary remediation techniques.
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Affiliation(s)
- Sasho Joksimoski
- University of Duisburg - Essen. Instrumental Analytical Chemistry, Universitätsstr. 5, 45141, Essen, Germany
| | - Klaus Kerpen
- University of Duisburg - Essen. Instrumental Analytical Chemistry, Universitätsstr. 5, 45141, Essen, Germany
| | - Ursula Telgheder
- University of Duisburg - Essen. Instrumental Analytical Chemistry, Universitätsstr. 5, 45141, Essen, Germany.
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3
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Cao X, Huo W, Wang M, Wei H, Lu Z, Li K. Visible-light-assisted peroxydisulfate activation over Ag 6Si 2O 7/Cu(II)-modified palygorskite composite for the effective degradation of organic pollutants by radical and nonradical pathways. ENVIRONMENTAL RESEARCH 2022; 214:113970. [PMID: 35987371 DOI: 10.1016/j.envres.2022.113970] [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: 04/27/2022] [Revised: 07/11/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Photoassisted persulfate activation (PPA) is highly efficient oxidation process, but the eligible catalysts are scarce. Herein, a visible-light-responsive Ag6Si2O7 was anchored on Cu(II)-exchanged attapulgite (Cu-Pal) via a facile precipitation-deposition method to construct a novel PDS activator. The synthesized catalyst was systemically analyzed by a series of characterization techniques. The results revealed that Ag6Si2O7 nanoparticles were evenly dispersed on Cu-Pal to form heterojunction. 16%-Ag6Si2O7/Cu-Pal, an optimal catalyst exhibited excellent catalytic performance and stability in the visible-light-assisted PDS activation for AR18 degradation. The influences of reaction parameters on this process were investigated. Under the optimal conditions ([catalyst] = 1.0 g L-1, [PDS] = 3.9 mM, pHi = 5.1), 50 mg L-1 of AR18 was completely degraded within 30 min. More importantly, quenching experiments and EPR tests revealed that besides the common SO4•- and •OH, 1O2 and O2•- were generated as main reactive oxygen species in the PPA by 16%-Ag6Si2O7/Cu-Pal. Moreover, it was found that surface hydroxyl groups of the catalyst and copper species incorporated in Pal could significantly influence PDS activation and ROS generation. Based on these results, together with PDS decomposition, fluorescent probe analysis, and XPS analysis of the used catalyst, the possible mechanisms of the PPA by 16%-Ag6Si2O7/Cu-Pal were proposed. Finally, the versatility and practicability of the established PPA process were verified by degrading other organic contaminants and testing effects of the coexisting anions and water matrices on AR18 degradation. This study may provide new insights for designing and developing the efficient heterogeneous catalysis for wastewater treatment via persulfate-based AOP.
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Affiliation(s)
- Xuefang Cao
- College of Chemistry & Material Science, Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Northwest University, Xi'an 710069, PR China
| | - Wenting Huo
- College of Chemistry & Material Science, Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Northwest University, Xi'an 710069, PR China
| | - Meiling Wang
- College of Chemistry & Material Science, Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Northwest University, Xi'an 710069, PR China
| | - Hong Wei
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, PR China
| | - Zhihui Lu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Kebin Li
- College of Chemistry & Material Science, Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Northwest University, Xi'an 710069, PR China.
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4
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Yang K, Lin H, Jiang J, Ma J, Yang Z. Enhanced electrochemical oxidation of tetracycline and atrazine on SnO2 reactive electrochemical membranes by low-toxic bismuth, cerium doping. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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5
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Breaking photoswitch activation depth limit using ionising radiation stimuli adapted to clinical application. Nat Commun 2022; 13:4102. [PMID: 35835744 PMCID: PMC9283480 DOI: 10.1038/s41467-022-30917-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 05/10/2022] [Indexed: 11/08/2022] Open
Abstract
Electromagnetic radiation-triggered therapeutic effect has attracted a great interest over the last 50 years. However, translation to clinical applications of photoactive molecular systems developed to date is dramatically limited, mainly because their activation requires excitation by low-energy photons from the ultraviolet to near infra-red range, preventing any activation deeper than few millimetres under the skin. Herein we conceive a strategy for photosensitive-system activation potentially adapted to biological tissues without any restriction in depth. High-energy stimuli, such as those employed for radiotherapy, are used to carry energy while molecular activation is provided by local energy conversion. This concept is applied to azobenzene, one of the most established photoswitches, to build a radioswitch. The radiation-responsive molecular system developed is used to trigger cytotoxic effect on cancer cells upon gamma-ray irradiation. This breakthrough activation concept is expected to expand the scope of applications of photosensitive systems and paves the way towards the development of original therapeutic approaches.
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Mucha P, Skoczyńska A, Małecka M, Hikisz P, Budzisz E. Overview of the Antioxidant and Anti-Inflammatory Activities of Selected Plant Compounds and Their Metal Ions Complexes. Molecules 2021; 26:4886. [PMID: 34443474 PMCID: PMC8398118 DOI: 10.3390/molecules26164886] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/09/2021] [Accepted: 08/10/2021] [Indexed: 12/12/2022] Open
Abstract
Numerous plant compounds and their metal-ion complexes exert antioxidative, anti-inflammatory, anticancer, and other beneficial effects. This review highlights the different bioactivities of flavonoids, chromones, and coumarins and their metal-ions complexes due to different structural characteristics. In addition to insight into the most studied antioxidative properties of these compounds, the first part of the review provides a comprehensive overview of exogenous and endogenous sources of reactive oxygen and nitrogen species, oxidative stress-mediated damages of lipids and proteins, and on protective roles of antioxidant defense systems, including plant-derived antioxidants. Additionally, the review covers the anti-inflammatory and antimicrobial activities of flavonoids, chromones, coumarins and their metal-ion complexes which support its application in medicine, pharmacy, and cosmetology.
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Affiliation(s)
- Paulina Mucha
- Department of the Chemistry of Cosmetic Raw Materials, Faculty of Pharmacy, Medical University of Łódź, Muszyńskiego 1, 90-151 Łódź, Poland
| | - Anna Skoczyńska
- Department of Pharmacology, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Poniatowskiego 15, 41-200 Sosnowiec, Poland;
| | - Magdalena Małecka
- Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, Pomorska 163/165, 90-236 Łódź, Poland;
| | - Paweł Hikisz
- Department of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Łódź, Poland;
| | - Elzbieta Budzisz
- Department of the Chemistry of Cosmetic Raw Materials, Faculty of Pharmacy, Medical University of Łódź, Muszyńskiego 1, 90-151 Łódź, Poland
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Samanta P, Dutta Choudhury S, Pal H. Lanthanide (III) ions as multichannel acceptors for bimolecular photoinduced electron transfer reactions with coumarin dyes. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Deokar RG, Barik A. Transient species of esculetin produced in pulse radiolysis: experimental and quantum chemical investigations. Phys Chem Chem Phys 2020; 22:18573-18584. [PMID: 32785355 DOI: 10.1039/d0cp03130e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Radiation chemical studies of esculetin (E), a dihydroxycoumarin derivative, were performed using a pulse radiolysis technique employing kinetic spectrometer and quantum chemical calculations. Both the oxidizing radicals, hydroxyl (˙OH) and azide (N3˙) radicals, and the reducing radical hydrated electron (eaq-) and hydrogen atom (H˙) reactions of E were used for the present study. The reaction of ˙OH and N3˙ radicals with E produced transients that absorbed at 410 nm; additionally, another broad band at 510 nm was observed for the ˙OH radical reaction. The reaction of ˙OH radicals with E formed the phenoxyl radical and ˙OH-adducts. It was revealed that 32% of the ˙OH radical reaction products of E were oxidizing in nature and 47% were reducing in nature. The carbonyl group of E was reduced by eaq- and subsequently converted to a neutral radical adduct upon protonation. Similarly, the H˙ atom reaction with E yielded a neutral adduct along with H˙ atom addition products. The transient product absorbed at 380 nm when E was reduced by eaq- and the H˙ atom; additionally, the H˙ atom addition product absorbed at 500 nm. In the case of E, the oxidizing radicals were reactive towards the aromatic ring and the phenolic OH group, whereas the reducing radicals were reactive towards the carbonyl group of E. Quantum chemical calculations using DFT and TD-DFT methods have supported the experimental observation. There was good agreement between the experimental and theoretical data on a number of occasions. Based on the energetics of the transients, it was suggested that the addition products were exothermic in nature. In the addition reaction with the ˙OH radical, there was a slight increase in the C-C bond length adjacent to the addition site compared to the remaining bonds. During the reduction process through the carbonyl group, the [double bond splayed left]C[double bond, length as m-dash]O bond length was increased from 1.221 Å to 1.358 Å. There was an excellent correlation between the calculated and experimentally observed absorption maximum for the oxidized product of E. Overall, these redox studies may find application in developing hydroxycoumarin derivatives as an antioxidant or as an electron transporting agent in biochemical processes. In addition, this information will be helpful for understanding the mechanism of removing pollutant dyes by advanced oxidation processes.
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Affiliation(s)
- Rupali G Deokar
- Department of Chemistry, Savitribai Phule Pune University, Pune 411007, India
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9
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Zhang S, Sun M, Hedtke T, Deshmukh A, Zhou X, Weon S, Elimelech M, Kim JH. Mechanism of Heterogeneous Fenton Reaction Kinetics Enhancement under Nanoscale Spatial Confinement. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:10868-10875. [PMID: 32867483 DOI: 10.1021/acs.est.0c02192] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Nanoscale catalysts that can enable Fenton-like chemistry and produce reactive radicals from hydrogen peroxide activation have been extensively studied in order to overcome the limitations of homogeneous Fenton processes. Despite several advantageous features, limitation in mass transfer of short-lived radical species is an inherent drawback of the heterogeneous system. Here, we present a mechanistic foundation for the way spatial confinement of Fenton chemistry at the nanoscale can significantly enhance the kinetics of radical-mediated oxidation reactions-pollutant degradation in particular. We synthesized a series of Fe3O4-functionalized nanoreactors with precise pore dimensions, based on an anodized aluminum oxide template, to enable quantitative analysis of nanoconfinement effects. Combined with computational simulation of spatial distribution of radicals, we found that hydroxyl radical concentration was strongly dependent on the distance from the surface of Fenton catalysts. This distance dependency significantly influences the gross reaction kinetics and accounts for the observed nanoconfinement effects. We further found that a length scale below 25 nm is critical to avoid the limitation of short-lived species diffusion and achieve kinetics that are orders of magnitude faster than those obtained in a batch suspension of heterogeneous catalysts. These findings suggest a new strategy to develop an innovative heterogeneous catalytic system with the most effective use of hydroxyl radicals in oxidation treatment scenarios.
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Affiliation(s)
- Shuo Zhang
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Avenue, New Haven, Connecticut 06511, United States
| | - Meng Sun
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Avenue, New Haven, Connecticut 06511, United States
| | - Tayler Hedtke
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Avenue, New Haven, Connecticut 06511, United States
| | - Akshay Deshmukh
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Avenue, New Haven, Connecticut 06511, United States
| | - Xuechen Zhou
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Avenue, New Haven, Connecticut 06511, United States
| | - Seunghyun Weon
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Avenue, New Haven, Connecticut 06511, United States
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Avenue, New Haven, Connecticut 06511, United States
| | - Jae-Hong Kim
- Department of Chemical and Environmental Engineering, Yale University, 17 Hillhouse Avenue, New Haven, Connecticut 06511, United States
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10
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Landry C, Morrison A, Ghandi K. Application of muon and other complementary radiation techniques to study interaction of radiation with nanostructures. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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Náfrádi M, Farkas L, Alapi T, Hernádi K, Kovács K, Wojnárovits L, Takács E. Application of coumarin and coumarin-3-carboxylic acid for the determination of hydroxyl radicals during different advanced oxidation processes. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2019.108610] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Yu Y, Yuan Y, Yang S, Wu F. Comment on "Synergetic Transformations of Multiple Pollutants Driven by Cr(VI)-Sulfite Reactions". ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:6107-6108. [PMID: 27172240 DOI: 10.1021/acs.est.6b00205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- Yingtan Yu
- Department of Environmental Science, Hubei Key Lab of Biomass Resource Chemistry and Environmental Biotechnology, School of Resources and Environmental Science, Wuhan University , 430079, P. R. China
| | - Yanan Yuan
- Department of Environmental Science, Hubei Key Lab of Biomass Resource Chemistry and Environmental Biotechnology, School of Resources and Environmental Science, Wuhan University , 430079, P. R. China
| | - Shaojie Yang
- Department of Environmental Science, Hubei Key Lab of Biomass Resource Chemistry and Environmental Biotechnology, School of Resources and Environmental Science, Wuhan University , 430079, P. R. China
| | - Feng Wu
- Department of Environmental Science, Hubei Key Lab of Biomass Resource Chemistry and Environmental Biotechnology, School of Resources and Environmental Science, Wuhan University , 430079, P. R. China
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13
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Jiang B, Wang Z. Response to Comment on "Synergetic Transformations of Multiple Pollutants Driven by Cr(VI)-Sulfite Reactions". ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:6109-6111. [PMID: 27172104 DOI: 10.1021/acs.est.6b01877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- Bo Jiang
- School of Environmental and Municipal Engineering, Qingdao University of Technology , Qingdao 266033, China
| | - Zhaohui Wang
- College of Environmental Science and Engineering, Donghua University , Shanghai, 201620, China
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14
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Guo L, Jing Y, Chaplin BP. Development and Characterization of Ultrafiltration TiO2 Magnéli Phase Reactive Electrochemical Membranes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:1428-1436. [PMID: 26735740 DOI: 10.1021/acs.est.5b04366] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This research focused on the synthesis, characterization, and performance testing of a novel Magnéli phase (TinO2n-1), n = 4 to 6, reactive electrochemical membrane (REM) for water treatment. The REMs were synthesized from tubular asymmetric TiO2 ultrafiltration membranes, and optimal reactivity was achieved for REMs composed of high purity Ti4O7. Probe molecules were used to assess outer-sphere charge transfer (Fe(CN)6(4-)) and organic compound oxidation through both direct oxidation (oxalic acid) and formation of OH(•) (coumarin, terephthalic acid). High membrane fluxes (3208 L m(-2) h(-1) bar(-1) (LMH bar(-1))) were achieved and resulted in a convection-enhanced rate constant for Fe(CN)6(4-) oxidation of 1.4 × 10(-4) m s(-1), which is the highest reported in an electrochemical flow-through reactor and approached the kinetic limit. The optimal removal rate for oxalic acid was 401.5 ± 18.1 mmol h(-1) m(-2) at 793 LMH, with approximately 84% current efficiency. Experiments indicate OH(•) were produced only on the Ti4O7 REM and not on less reduced phases (e.g., Ti6O11). REMs were also tested for oxyanion separation. Approximately 67% removal of a 1 mM NO3(-) solution was achieved at 58 LMH, with energy consumption of 0.22 kWh m(-3). These results demonstrate the extreme promise of REMs for water treatment applications.
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Affiliation(s)
- Lun Guo
- Department of Chemical Engineering, University of Illinois at Chicago , 810 S. Clinton Street, Chicago, Illinois 60607
| | - Yin Jing
- Department of Chemical Engineering, University of Illinois at Chicago , 810 S. Clinton Street, Chicago, Illinois 60607
| | - Brian P Chaplin
- Department of Chemical Engineering, University of Illinois at Chicago , 810 S. Clinton Street, Chicago, Illinois 60607
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Zhao C, Arroyo-Mora LE, DeCaprio AP, Sharma VK, Dionysiou DD, O'Shea KE. Reductive and oxidative degradation of iopamidol, iodinated X-ray contrast media, by Fe(III)-oxalate under UV and visible light treatment. WATER RESEARCH 2014; 67:144-153. [PMID: 25269106 DOI: 10.1016/j.watres.2014.09.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 09/02/2014] [Accepted: 09/06/2014] [Indexed: 06/03/2023]
Abstract
Iopamidol, widely employed as iodinated X-ray contrast media (ICM), is readily degraded in a Fe(III)-oxalate photochemical system under UV (350 nm) and visible light (450 nm) irradiation. The degradation is nicely modeled by pseudo first order kinetics. The rates of hydroxyl radical (OH) production for Fe(III)-oxalate/H2O2/UV (350 nm) and Fe(III)-oxalate/H2O2/visible (450 nm) systems were 1.19 ± 0.12 and 0.30 ± 0.01 μM/min, respectively. The steady-state concentration of hydroxyl radical (OH) for the Fe(III)-oxalate/H2O2/UV (350 nm) conditions was 10.88 ± 1.13 × 10(-14) M and 2.7 ± 0.1 × 10(-14) M for the Fe(III)-oxalate/H2O2/visible (450 nm). The rate of superoxide anion radical (O2(-)) production under Fe(III)-oxalate/H2O2/UV (350 nm) was 0.19 ± 0.02 μM/min with a steady-state concentration of 5.43 ± 0.473 × 10(-10) M. Detailed product studies using liquid chromatography coupled to Q-TOF/MS demonstrate both reduction (multiple dehalogenations) and oxidation (aromatic ring and side chains) contribute to the degradation pathways. The reduction processes appear to be initiated by the carbon dioxide anion radical (CO2(-)) while oxidation processes are consistent with OH initiated reaction pathways. Unlike most advanced oxidation processes the Fe(III)-oxalate/H2O2/photochemical system can initiate to both reductive and oxidative degradation processes. The observed reductive dehalogenation is an attractive remediation strategy for halogenated organic compounds as the process can dramatically reduce the formation of the problematic disinfection by-products often associated with oxidative treatment processes.
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Affiliation(s)
- Cen Zhao
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL 3319, USA
| | - Luis E Arroyo-Mora
- Department of Chemistry and Biochemistry, International Forensic Research Institute (IFRI), Florida International University, Miami, FL 33199, USA
| | - Anthony P DeCaprio
- Department of Chemistry and Biochemistry, International Forensic Research Institute (IFRI), Florida International University, Miami, FL 33199, USA
| | - Virender K Sharma
- Department of Environmental and Occupational Health, School of Rural Public Health, Texas A&M University, Texas 77843, USA
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0012, USA
| | - Kevin E O'Shea
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL 3319, USA.
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16
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Sicard-Roselli C, Brun E, Gilles M, Baldacchino G, Kelsey C, McQuaid H, Polin C, Wardlow N, Currell F. A new mechanism for hydroxyl radical production in irradiated nanoparticle solutions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:3338-46. [PMID: 24863679 DOI: 10.1002/smll.201400110] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 03/12/2014] [Indexed: 05/20/2023]
Abstract
The absolute yield of hydroxyl radicals per unit of deposited X-ray energy is determined for the first time for irradiated aqueous solutions containing metal nanoparticles based on a "reference" protocol. Measurements are made as a function of dose rate and nanoparticle concentration. Possible mechanisms for hydroxyl radical production are considered in turn: energy deposition in the nanoparticles followed by its transport into the surrounding environment is unable to account for observed yield whereas energy deposition in the water followed by a catalytic-like reaction at the water-nanoparticle interface can account for the total yield and its dependence on dose rate and nanoparticle concentration. This finding is important because current models used to account for nanoparticle enhancement to radiobiological damage only consider the primary interaction with the nanoparticle, not with the surrounding media. Nothing about the new mechanism appears to be specific to gold, the main requirements being the formation of a structured water layer in the vicinity of the nanoparticle possibly through the interaction of its charge and the water dipoles. The massive hydroxyl radical production is relevant to a number of application fields, particularly nanomedicine since the hydroxyl radical is responsible for the majority of radiation-induced DNA damage.
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Affiliation(s)
- Cécile Sicard-Roselli
- Laboratoire de Chimie Physique CNRS UMR8000, Université Paris-Sud, 91405, Orsay Cedex, France
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17
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Shibin NB, Sreekanth R, Aravind UK, Afsal Mohammed KM, Chandrashekhar NV, Joseph J, Sarkar SK, Naik DB, Aravindakumar CT. Radical chemistry of glucosamine naphthalene acetic acid and naphthalene acetic acid: a pulse radiolysis study. J PHYS ORG CHEM 2014. [DOI: 10.1002/poc.3285] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | - Usha K. Aravind
- Advanced Centre of Environmental Studies and Sustainable Development; Mahatma Gandhi University; Kottayam 686560 Kerala India
| | | | | | - Jayan Joseph
- School of Chemical Sciences; Mahatma Gandhi University; Kottayam 686560 Kerala India
| | - Sisir K. Sarkar
- Radiation and Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400085 Maharashtra India
| | - Devidas B. Naik
- Radiation and Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400085 Maharashtra India
| | - Charuvila T. Aravindakumar
- School of Environmental Sciences; Mahatma Gandhi University; Kottayam 686560 Kerala India
- Inter University Instrumentation Centre; Mahatma Gandhi University; Kottayam 686560 Kerala India
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Yamashita S, Baldacchino G, Maeyama T, Taguchi M, Muroya Y, Lin M, Kimura A, Murakami T, Katsumura Y. Mechanism of radiation-induced reactions in aqueous solution of coumarin-3-carboxylic acid: Effects of concentration, gas and additive on fluorescent product yield. Free Radic Res 2012; 46:861-71. [DOI: 10.3109/10715762.2012.684879] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Bejan D, Guinea E, Bunce NJ. On the nature of the hydroxyl radicals produced at boron-doped diamond and Ebonex® anodes. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.02.097] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Production of a fluorescence probe in ion-beam radiolysis of aqueous coumarin-3-carboxylic acid solution—1: Beam quality and concentration dependences. Radiat Phys Chem Oxf Engl 1993 2011. [DOI: 10.1016/j.radphyschem.2010.11.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Smith GJ, Dunford CL, Roberts PB. The photostability and fluorescence of hydroxycoumarins in aprotic solvents. J Photochem Photobiol A Chem 2010. [DOI: 10.1016/j.jphotochem.2009.12.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Determination of the time-dependent OH-yield by using a fluorescent probe. Application to heavy ion irradiation. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2008.12.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Louit G, Hanedanian M, Taran F, Coffigny H, Renault JP, Pin S. Determination of hydroxyl rate constants by a high-throughput fluorimetric assay: towards a unified reactivity scale for antioxidants. Analyst 2008; 134:250-5. [PMID: 19173045 DOI: 10.1039/b813871k] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe in this article the development of a new method for the determination of rate constants of reaction of the hydroxyl radical, generated by radiolysis of water, with almost any possible molecule. It has been designed to provide a fast and reliable screening of antioxidant banks using microplates. Our particular approach is based on the use of the coumarin molecule as a competitor against the tested molecules: after a fast pulse of low dose irradiation, the fluorescence of 7-hydroxycoumarin produced by the oxidation of coumarin is measured and is inversely proportional to the scavenging ability of the tested antioxidant. We have validated our protocol using 32 molecules whose rate constants with HO had already been evaluated and found a good agreement between our rate constants and the latter ones. The scopes and limitations of our method, as well as those of other rate constant determination methods, are discussed.
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Affiliation(s)
- Guillaume Louit
- CEA Saclay, IRAMIS, SCM, Laboratoire de Radiolyse, F-91191 -Gif sur Yvette Cedex, France
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Kapková P, Heller E, Kugelmann E, Faber J, Bringmann G, Kessler U, Folkers G, Holzgrabe U. Random Chemistry as a New Tool for the Generation of Small-Compound Libraries. Arch Pharm (Weinheim) 2006; 339:489-97. [PMID: 16929558 DOI: 10.1002/ardp.200600084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Advances in modern medicinal chemistry have enabled scientists to engineer new pathways aiming at the generation of novel chemical entities. Random chemistry, the serendipitous synthesis of small-compound libraries by gamma-irradiation of a highly active lead compound or pharmacophoric fragments of active compounds, represents a complementary methodology, which provides both, compounds with resembling molecular structure and rearranged structures not previously known. Since the libraries are likely to be derived from radical chemistry, Fenton's reagent was applied to a methanol/water solution of tacrine to mimic the irradiation. Indeed, the experiment resulted in a similar product spectrum as found for tacrine in water and methanol solutions after (60)Co irradiation. However, the application of Fenton's reagent is limited due to its poor solubility in organic solvents. Since the drugs we are aiming for should exhibit high water solubility, this limitation can be regarded as an advantage at the same time. Further extension of the random chemistry approach led to the successful irradiation of non-active but drugable single fragments and combinations of fragments, i.e. the irradiation of tetrahydroisoquinoline and benzylamine, both being fragments of naphthylisoquinolines with antiplasmodial activity. The obtained isoquinoline derivatives were found to exhibit anti-infective activities and thus are promising new lead structures.
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Affiliation(s)
- Petra Kapková
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Würzburg, Germany
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Redox chemistry of Ru(II) complexes of 6,7-dicyanodipyridoquinoxaline: a radiation chemical study. J Photochem Photobiol A Chem 2004. [DOI: 10.1016/j.jphotochem.2004.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Trenor SR, Shultz AR, Love BJ, Long TE. Coumarins in Polymers: From Light Harvesting to Photo-Cross-Linkable Tissue Scaffolds. Chem Rev 2004; 104:3059-77. [PMID: 15186188 DOI: 10.1021/cr030037c] [Citation(s) in RCA: 551] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Scott R Trenor
- Polymeric Materials and Interfaces Laboratory, Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0344, USA
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