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Kung WM, Lin HHH, Wang YH, Lin AYC. Solar-driven persulfate degradation of caffeine and cephradine in synthetic human urine. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133031. [PMID: 38008053 DOI: 10.1016/j.jhazmat.2023.133031] [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: 08/08/2023] [Revised: 11/08/2023] [Accepted: 11/16/2023] [Indexed: 11/28/2023]
Abstract
Urine source separation, as an innovative concept for the reuse of microlevel nutrients in human urine, has drawn increasing attention recently. Consequently, removing coexisting pharmaceuticals in urine is necessary for further reuse. This study is the first to apply the solar-driven persulfate process (Solar/PS) to the investigation of cephradine (CFD) and caffeine (CAF) degradation in synthetic human urine. The results showed that significantly more degradation of CFD and CAF occurs with the Solar/PS process than with persulfate oxidation and direct sunlight photolysis, respectively. The generated reactive species ·OH, SO4·-, O2·- and 1O2 were identified in the Solar/PS process. While SO4·- played a dominant role at pH 6, it played a minor role at pH 9 due to the lower amount generated under alkaline conditions. The presence of chloride and ammonia negatively impacted the photodegradation of both compounds. In contrast, bicarbonate exhibited no effect on CAF but enhanced CFD degradation owing to its amino-acid-like structure, which has a higher reactivity toward CO3·-. Although total organic carbon (TOC) was partially mineralized after 6 h of operation, no Microtox® toxicity was observed.
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Affiliation(s)
- Wei-Ming Kung
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei 106, Taiwan, ROC
| | - Hank Hui-Hsiang Lin
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei 106, Taiwan, ROC
| | - Yu-Hsiang Wang
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei 106, Taiwan, ROC
| | - Angela Yu-Chen Lin
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei 106, Taiwan, ROC.
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2
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Lin HHH, Lin AYC. Peracetic acid as an alternative disinfectant for micropollutants degradation and disinfection byproducts control in outdoor swimming pools. JOURNAL OF HAZARDOUS MATERIALS 2024; 464:132988. [PMID: 37979421 DOI: 10.1016/j.jhazmat.2023.132988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 10/27/2023] [Accepted: 11/09/2023] [Indexed: 11/20/2023]
Abstract
Peracetic acid (PAA) has garnered significant interest as a novel alternative to chlorine-based disinfectants for water treatment due to its broad-spectrum antimicrobial activity and its ability of reactive species generation when exposed to UV light. However, limited studies have investigated micropollutant degradation in the presence of PAA under solar irradiation. This is the first study to comprehensively investigate the photodegradation of caffeine (CAF) and 4-methylbenzylidene camphor (4-MBC) and the removal of disinfection byproducts (DBPs) in the presence of PAA under simulated solar light. The study revealed that the photodegradation of CAF and 4-MBC was significantly enhanced in the presence of PAA, following pseudo-first-order kinetics (R2 > 0.98) with reaction rates (kobs) of 0.220 and 0.111 h-1, respectively. In addition, substantial reduction of 21 DBPs, including trihalomethanes, haloacetic acids and haloacetonitriles, and no DBPs formation were observed in the presence of PAA and simulated solar irradiation. The proportion of coexisting H2O2 in the PAA solution considerably influenced target compounds degradation. CAF and 4-MBC were degraded faster under acidic conditions than under alkaline conditions. Hydroxyl radicals (·OH) dominated the degradation of CAF at different pH values, while direct photolysis and other reactive species played a major role in the degradation of 4-MBC.
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Affiliation(s)
- Hank Hui-Hsiang Lin
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei 106, Taiwan
| | - Angela Yu-Chen Lin
- Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Rd., Taipei 106, Taiwan.
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3
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Shao H, Ren Y, Lei C, Xu G. Electron beam degradation of the cardiovascular drug salbutamol: Mechanisms and degradation pathways. CHEMOSPHERE 2023; 318:137939. [PMID: 36702419 DOI: 10.1016/j.chemosphere.2023.137939] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/20/2023] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
With the increasing incidence and mortality of cardiovascular diseases, high consumption of the cardiovascular drug salbutamol (SAL) has made this compound an emerging pollutant in natural water and a challenge for traditional wastewater treatment. In this paper, an efficient advanced oxidation process was used to degrade SAL by electron beam (EB) irradiation. The results revealed that 100 mg L-1 of SAL could be nearly completely removed (95.1%) at 10 kGy and the degradation kinetic well followed pseudo first-order kinetic model. Different factors, including pH, inorganic ions and water matrix, had varying effects on the degradation of SAL owing to their important influence on the formation of reactive species in the aqueous solution. And it was found that eaq- played a major role in the degradation of SAL parent. Moreover, the addition of K2S2O8 (20 mM) increased the SAL mineralization rate from 2.9% to 64.2%, suggesting that oxidation free radicals could greatly improve the mineralization rate of SAL. Combining with the theoretical calculations and determined degradation by-products, four possible degradation pathways of SAL by EB irradiation were proposed, including H•, •OH and eaq- all participated in the degradation of SAL. Finally, toxicity evaluation suggested that the toxicity of SAL aqueous solution reduced after EB irradiation, indicating that it is an effective method to degrade SAL.
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Affiliation(s)
- Haiyang Shao
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, PR China
| | - Yingfei Ren
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, PR China
| | - Chen Lei
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, PR China
| | - Gang Xu
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, PR China; Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai, 200444, PR China.
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Zhang W, Lu J, Liu S, Wang C, Zuo Q, Gong L. The Potential of Spent Coffee Grounds @ MOFs Composite Catalyst in Efficient Activation of PMS to Remove the Tetracycline Hydrochloride from an Aqueous Solution. TOXICS 2023; 11:88. [PMID: 36850964 PMCID: PMC9965720 DOI: 10.3390/toxics11020088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/13/2023] [Accepted: 01/14/2023] [Indexed: 06/18/2023]
Abstract
The efficient removal of Tetracycline Hydrochloride (TC) from wastewater, which is a difficult process, has attracted increasing attention. Aiming to synchronously achieve the goal of natural waste utilization and PMS activation, we have combined the MOFs material with waste coffee grounds (CG). The catalytic activity of the CG@ZIF-67 composite in the TC removal process was thoroughly evaluated, demonstrating that the TC removal rate could reach 96.3% within 30 min at CG@ZIF-67 composite dosage of 100 mg/L, PMS concertation of 1.0 mM, unadjusted pH 6.2, and contact temperate of 293.15 K. The 1O2 and ·SO4- in the CG@ZIF-67/PMS/TC system would play the crucial role in the TC degradation process, with 1O2 acting as the primary ROS. The oxygen-containing functional groups and graphite N on the surface of CG@ZIF-67 composite would play a major role in efficiently activating PMS and correspondingly degrading TC. In addition, the CG@ZIF-67/PMS/TC system could withstand a wide pH range (3-11). The application of CG in preparing MOF-based composites will provide a new method of removing emerging pollutants from an aqueous solution.
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Affiliation(s)
- Wei Zhang
- School of Ecology and Environment, Zhengzhou University, 100 Kexue Avenue, Zhengzhou 450001, China
- Yellow River Institute for Ecological Protection and Regional Coordination Development, Zhengzhou University, 100 Kexue Avenue, Zhengzhou 450001, China
- Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Pingdingshan 467036, China
- Henan International Joint Laboratory of Water Cycle Simulation and Environmental Protection, Zhengzhou 450001, China
- Zhengzhou Key Laboratory of Water Resource and Environment, Zhengzhou 450001, China
| | - Jiajia Lu
- School of Ecology and Environment, Zhengzhou University, 100 Kexue Avenue, Zhengzhou 450001, China
| | - Shoushu Liu
- School of Ecology and Environment, Zhengzhou University, 100 Kexue Avenue, Zhengzhou 450001, China
| | - Chen Wang
- School of Ecology and Environment, Zhengzhou University, 100 Kexue Avenue, Zhengzhou 450001, China
| | - Qiting Zuo
- Yellow River Institute for Ecological Protection and Regional Coordination Development, Zhengzhou University, 100 Kexue Avenue, Zhengzhou 450001, China
- Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Pingdingshan 467036, China
- School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Lin Gong
- School of Ecology and Environment, Zhengzhou University, 100 Kexue Avenue, Zhengzhou 450001, China
- Yellow River Institute for Ecological Protection and Regional Coordination Development, Zhengzhou University, 100 Kexue Avenue, Zhengzhou 450001, China
- Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Pingdingshan 467036, China
- Henan International Joint Laboratory of Water Cycle Simulation and Environmental Protection, Zhengzhou 450001, China
- Zhengzhou Key Laboratory of Water Resource and Environment, Zhengzhou 450001, China
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5
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Hong AJ, Lee J, Cha Y, Zoh KD. Propiconazole degradation and its toxicity removal during UV/H 2O 2 and UV photolysis processes. CHEMOSPHERE 2022; 302:134876. [PMID: 35551935 DOI: 10.1016/j.chemosphere.2022.134876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/30/2022] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
Propiconazole (PRO) is a triazole fungicide that is frequently detected in the water. In this study, we investigated the kinetics and degradation mechanism of PRO during the UV photolysis and UV/H2O2 processes. PRO was removed by the pseudo-first-order kinetics in both processes. The removal of PRO was enhanced by increasing H2O2 concentration in the UV/H2O2 process. The highest removal under neutral conditions, and lower removal of PRO were observed in acidic and alkaline pHs in the UV/H2O2 process. The presence of natural water ingredients such as Cl-, NO3-, humic acid acted as radical scavengers, but HCO3- ion acted as both radical promoter and scavenger in the UV/H2O2 process. The transformation products (TPs) of PRO during both processes were identified using LC-QTOF/MS. Four TPs ([M+H]+ = 238, 256, 306, and 324) were identified during UV photolysis, and six TPs ([M+H]+ = 238, 256, 306, 324, 356, and 358) were identified in the UV/H2O2 process. Among the identified TPs, TP with [M+H]+ values of 356 and 358 were newly identified in the UV/H2O2 process. In addition, ionic byproducts, such as Cl-, NO3-, formate (HCOO-), and acetate (CH3COO-), were newly identified, indicating that significant mineralization was achieved in the UV/H2O2 process. Based on the identified TPs and ionic byproducts, the degradation mechanisms of PRO during two processes were proposed. The major reactions in both processes were ring cleavage and cyclization, and hydroxylation by OH radicals. The Microtox test with Vibrio fischeri showed that, while the toxicity of the reaction solution increased first, then gradually decreased during UV photolysis, the UV/H2O2 process initially increased toxicity at 10 min due to the production of TPs, but toxicity was completely removed as the reaction progressed. The results obtained in this study imply that the UV/H2O2 process is an effective treatment for eliminating PRO, its TPs, and the resulting toxicity in water.
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Affiliation(s)
- Ae-Jung Hong
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, 08826, South Korea
| | - Jaewon Lee
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, 08826, South Korea
| | - Youngho Cha
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, 08826, South Korea
| | - Kyung-Duk Zoh
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, 08826, South Korea.
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6
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Díaz-Sánchez M, Hernández-Benítez I, Díaz-García D, Prashar S, Gómez-Ruiz S. Nanohybrids based on F-doped titanium dioxides and carbon species with enhanced dual adsorption-photodegradation activity for water decontamination. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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7
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Asghar A, Lutze HV, Tuerk J, Schmidt TC. Influence of water matrix on the degradation of organic micropollutants by ozone based processes: A review on oxidant scavenging mechanism. JOURNAL OF HAZARDOUS MATERIALS 2022; 429:128189. [PMID: 35077976 DOI: 10.1016/j.jhazmat.2021.128189] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 12/20/2021] [Accepted: 12/28/2021] [Indexed: 06/14/2023]
Abstract
The prevalence of organic micropollutants (OMPs) in aquatic environment has expedited scientific and regulatory efforts to retrofit existing wastewater treatment plants (WWTPs). The current strategy involves WWTPs upgrading with post-ozonation i.e., ozone (O3) and/or peroxone process (O3 +H2O2). Still, ozone-based degradation of OMPs faces several challenges. For example, the degradation mechanism and kinetics of OMPs could largely be affected by water matrix compounds which include inorganic ions and natural organic matter (NOM). pH also plays a decisive role in determining the reactivity of the oxidants (O3, H2O2, andHO•), stability and speciation of matrix constituents and OMPs and thus susceptibility of OMPs to the reactions with oxidants. There have been reviews discussing the impact of matrix components on the degradation of OMPs by advanced oxidation processes (AOPs). Nevertheless, a review focusing on scavenging mechanisms, formation of secondary oxidants and their scavenging effects with a particular focus on ozonation and peroxone process is lacking. Therefore, in order to broaden the knowledge on this subject, the database 'Web of Science' was searched for the studies related to the 'matrix effect on the degradation of organic micropollutants by ozone based processes' over the time period of 2004-2021. The relevant literature was thoroughly reviewed and following conclusions were made: i) chloride has inhibitory effects if it exits at higher concentrations or as free chlorine i.e. HOCl/ClO-. ii) The inhibitory effects of chloride, bromide, HOBr/OBr- and HOCl/ClO- are dominant in neutral and alkaline conditions and may result in the formation of secondary oxidants (e.g., chlorine atoms or free bromine), which in turn contribute to pollutant degradation or form undesired oxidation by-products such as BrO3-, ClO3- and halogenated organic products. ii) NOM may induce inhibitory or synergetic effects depending on the type, chemical properties and concentration of NOM. Therefore, more efforts are required to understand the importance of pH variation as well as the effects of water matrix on the reactivity of oxidants and subsequent degradation of OMPs.
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Affiliation(s)
- Anam Asghar
- Instrumental Analytical Chemistry, Faculty of Chemistry, University of Duisburg-Essen, Universitätsstr. 5, Essen, Germany.
| | - Holger V Lutze
- Department of Civil and Environmental Engineering Sciences, Technische Universität Darmstadt, Karolinenpl. 5, 64289 Darmstadt, Germany; Centre for Water and Environmental Research (ZWU), Universitätsstraße 5, 45141 Essen, Germany; IWW Water Centre, Moritzstraße 26, 45476 Mülheim an der Ruhr, Germany
| | - Jochen Tuerk
- Institut für Energie, und Umwelttechnik e. V. (IUTA, Institute of Energy and Environmental Technology), Bliersheimer Str. 58-60, 47229 Duisburg, Germany; Centre for Water and Environmental Research (ZWU), Universitätsstraße 5, 45141 Essen, Germany
| | - Torsten C Schmidt
- Instrumental Analytical Chemistry, Faculty of Chemistry, University of Duisburg-Essen, Universitätsstr. 5, Essen, Germany; Centre for Water and Environmental Research (ZWU), Universitätsstraße 5, 45141 Essen, Germany; IWW Water Centre, Moritzstraße 26, 45476 Mülheim an der Ruhr, Germany
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8
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Díaz-Sánchez M, Delgado-Álvarez PN, Gómez IJ, Díaz-García D, Prashar S, Gómez-Ruiz S. Modulation of the photocatalytic activity and crystallinity of F-TiO 2 nanoparticles by using green natural carboxylic acids. CrystEngComm 2022. [DOI: 10.1039/d2ce00699e] [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
Ultrareactive F-doped mesoporous TiO2 nanoparticles with potential environmental applications have been synthesized using green natural carboxylic acids.
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Affiliation(s)
- Miguel Díaz-Sánchez
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T, Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, Spain
| | - Paula N. Delgado-Álvarez
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T, Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, Spain
| | - I. Jénnifer Gómez
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, 61137 Brno, Czech Republic
| | - Diana Díaz-García
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T, Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, Spain
| | - Sanjiv Prashar
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T, Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, Spain
| | - Santiago Gómez-Ruiz
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T, Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933 Móstoles, Madrid, Spain
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9
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He H, Wang S, Wang J. Degradation of 3-methylindole by ionizing radiation: Performance and pathway. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119515] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Crook MF, Laube C, Moreno-Hernandez IA, Kahnt A, Zahn S, Ondry JC, Liu A, Alivisatos AP. Elucidating the Role of Halides and Iron during Radiolysis-Driven Oxidative Etching of Gold Nanocrystals Using Liquid Cell Transmission Electron Microscopy and Pulse Radiolysis. J Am Chem Soc 2021; 143:11703-11713. [PMID: 34292703 DOI: 10.1021/jacs.1c05099] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Graphene liquid cell transmission electron microscopy (TEM) has enabled the observation of a variety of nanoscale transformations. Yet understanding the chemistry of the liquid cell solution and its impact on the observed transformations remains an important step toward translating insights from liquid cell TEM to benchtop chemistry. Gold nanocrystal etching can be used as a model system to probe the reactivity of the solution. FeCl3 has been widely used to promote gold oxidation in bulk and liquid cell TEM studies, but the roles of the halide and iron species have not been fully elucidated. In this work, we observed the etching trajectories of gold nanocrystals in different iron halide solutions. We observed an increase in gold nanocrystal etch rate going from Cl-- to Br-- to I--containing solutions. This is consistent with a mechanism in which the dominant role of halides is as complexation agents for oxidized gold species. Additionally, the mechanism through which FeCl3 induces etching in liquid cell TEM remains unclear. Ground-state bleaching of the Fe(III) absorption band observed through pulse radiolysis indicates that iron may react with Cl2·- radicals to form an oxidized transient species under irradiation. Complete active space self-consistent field (CASSCF) calculations indicate that the FeCl3 complex is oxidized to an Fe species with an OH radical ligand. Together our data indicate that an oxidized Fe species may be the active oxidant, while halides modulate the etch rate by tuning the reduction potential of gold nanocrystals.
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Affiliation(s)
- Michelle F Crook
- Department of Chemistry, University of California-Berkeley, Berkeley, California 94720, United States
| | - Christian Laube
- Department of Chemistry, University of California-Berkeley, Berkeley, California 94720, United States
| | - Ivan A Moreno-Hernandez
- Department of Chemistry, University of California-Berkeley, Berkeley, California 94720, United States
| | - Axel Kahnt
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, D-04318 Leipzig, Germany
| | - Stefan Zahn
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, D-04318 Leipzig, Germany
| | - Justin C Ondry
- Department of Chemistry, University of California-Berkeley, Berkeley, California 94720, United States.,Kavli Energy NanoScience Institute, University of California-Berkeley and Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Aijia Liu
- Department of Chemistry, University of California-Berkeley, Berkeley, California 94720, United States
| | - A Paul Alivisatos
- Department of Chemistry, University of California-Berkeley, Berkeley, California 94720, United States.,Kavli Energy NanoScience Institute, University of California-Berkeley and Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Materials Science and Engineering, University of California-Berkeley, Berkeley, California 94720, United States
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11
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Degradation of pyrazinamide in aqueous solution by electron beam irradiation: kinetics, influence factors and mechanism study. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07757-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Chen X, Zhuan R, Wang J. Assessment of degradation characteristic and mineralization efficiency of norfloxacin by ionizing radiation combined with Fenton-like oxidation. JOURNAL OF HAZARDOUS MATERIALS 2021; 404:124172. [PMID: 33049634 DOI: 10.1016/j.jhazmat.2020.124172] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 09/08/2020] [Accepted: 09/30/2020] [Indexed: 06/11/2023]
Abstract
In this study, the degradation of norfloxacin was investigated by ionizing radiation combined with Fenton-like oxidation in order to enhance the degradation and mineralization of norfloxacin. The result showed that the removal efficiency of norfloxacin was 100%, 81.8%, 64.5%, 51.9%, and 45.6% at 0.4 kGy radiation when its concentration was 5, 10, 20, 30, and 40 mg/L. Norfloxacin could be completely degraded over pH range of 3.06-10.96 at 2 kGy radiation. The presence of inorganic anions had obvious influence on the degradation of norfloxacin, which decreased from 89.4% to 59.0%, 76.9%, 86.9%, 88.7% and 83.9% in the presence of 10 mmol/L CO32-, HCO3-, NO3-, SO42-, Cl-, HPO42-. The removal efficiency of norfloxacin decreased from 100% to 11.8%, 27.6% and 89.3% in the presence of peptone, glucose, and humic acid. The addition of Fenton-like catalysts, such as magnetite and goethite, could improve the mineralization ratio of norfloxacin because they could decompose hydrogen peroxide generated during the radiation process, to form hydroxyl radicals, leading to the enhancement of removal efficiency of norfloxacin. Finally, the intermediate products of norfloxacin degradation were analyzed by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-QTOF), and the degradation pathway was proposed.
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Affiliation(s)
- Xiaoying Chen
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China
| | - Run Zhuan
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China
| | - Jianlong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China; Beijing Key Laboratory of Radioactive Waste Treatment, Tsinghua University, Beijing 100084, PR China.
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13
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Lee YM, Lee G, Zoh KD. Benzophenone-3 degradation via UV/H 2O 2 and UV/persulfate reactions. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123591. [PMID: 32795823 DOI: 10.1016/j.jhazmat.2020.123591] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 07/13/2020] [Accepted: 07/27/2020] [Indexed: 06/11/2023]
Abstract
The degradation of benzophenone-3 (BP3) in water via the UV/H2O2 and UV/persulfate (UV/PS) reactions was investigated. The degradation of BP3 exhibited pseudo-first-order kinetics in both reactions. The degradation efficiency of BP3 was higher in the UV/PS reaction than in the UV/H2O2 reaction. In both reactions, the observed rate constants (kobs) of BP3 degradation were highest at pH 6 and increased linearly with increasing dosage of H2O2 and persulfate. The second-order rate constants of BP3 with •OH (k•OH_BP3) and •SO4- (k•SO4-_BP3) were determined to be 1.09 (± 0.05) × 1010 and 1.67 (± 0.04) × 109 M-1 s-1, respectively. The kobs values of BP3 were affected by water components such as HCO3-, NO3-, Cl-, and Br- ions, as well as humic acid. Based on the identified transformation products (TPs), the degradation pathway of BP3 during both reactions was a hydroxylation reaction. The inhibition of bioluminescence in Vibrio fischeri due to BP3 and its TPs decreased more quickly in the UV/PS reaction than in the UV/H2O2 reaction. The results suggest that the UV/PS process is a better alternative to the UV/H2O2 process for removing BP3 and its toxicity in water.
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Affiliation(s)
- Young-Min Lee
- Institute of Health and Environment, Seoul National University, Seoul, South Korea
| | - Gowoon Lee
- Institute of Health and Environment, Seoul National University, Seoul, South Korea
| | - Kyung-Duk Zoh
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, South Korea.
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14
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Ding X, Gutierrez L, Croue JP, Li M, Wang L, Wang Y. Hydroxyl and sulfate radical-based oxidation of RhB dye in UV/H 2O 2 and UV/persulfate systems: Kinetics, mechanisms, and comparison. CHEMOSPHERE 2020; 253:126655. [PMID: 32302899 DOI: 10.1016/j.chemosphere.2020.126655] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/27/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
The degradation kinetics and mechanisms of Rhodamine B (RhB) dye by •OH and SO4•- based advanced oxidation processes were investigated. The •OH and SO4•- radicals were generated by UV photolysis of hydrogen peroxide and persulfate (i.e., UV/H2O2 and UV/PS), respectively. The effects of initial solution pH, RhB concentration, oxidant dosage, Fe2+ concentration, and water matrices were examined. The results showed that the degradation of RhB followed pseudo-first-order kinetics in both processes, with the UV/H2O2 process exhibiting better performance than that of the UV/PS process. Acidic conditions were favorable to the degradation of RhB in both systems. Increasing the oxidant dosage or decreasing the contaminant concentration could enhance the degradation of RhB. Photo-Fenton-like processes accelerated the performance when Fe2+ was added into both systems. The removal efficiency of RhB was inhibited upon the addition of humic substances. The addition of Cl- displayed no significant effect and promoted RhB degradation in UV/H2O2 and UV/PS systems, respectively. The presence of NO3- promoted RhB degradation, while H2PO4- and C2O42- showed an inhibitory effect on both UV/H2O2 and UV/PS processes. Radical scavenging tests revealed the dominant role of SO4•- radicals in the UV/PS system. Furthermore, the evolution of low molecular weight organic acids and NH4+ during the degradation of RhB in these two processes were compared. Both UV/H2O2 and UV/PS systems led to similar formation trends of NH4+ and some ring-opening products (e.g., formic acid, acetic acid, and oxalic acid), suggesting some analogies in the decay pathways of RhB by •OH and SO4•--induced oxidation processes.
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Affiliation(s)
- Xinxin Ding
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China
| | | | - Jean-Philippe Croue
- Institut de Chimie des Milieux et des Matériaux IC2MP UMR, 7285 CNRS, Université de Poitiers, France.
| | - Minrui Li
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China
| | - Lijun Wang
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China
| | - Yuru Wang
- Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China.
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15
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Huo Z, Wang S, Shao H, Wang H, Xu G. Radiolytic degradation of anticancer drug capecitabine in aqueous solution: kinetics, reaction mechanism, and toxicity evaluation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:20807-20816. [PMID: 32248418 DOI: 10.1007/s11356-020-08500-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 03/17/2020] [Indexed: 06/11/2023]
Abstract
The occurrence of anticancer drugs in the environment has attracted wide attention due to its potential environmental risks. The aim of this study was to investigate degradation characteristics and mechanism of anticancer drug capecitabine (CPC) by electron beam (EB) irradiation. The results showed that EB was an efficient water treatment process for CPC. The degradation followed pseudo-first-order kinetics with dose constants ranged from 1.27 to 3.94 kGy-1. Removal efficiencies in natural water filtered or unfiltered were lower than pure water due to the effect of water matrix components. The degradation was restrained by the presence of NO2-, NO3- and CO32-, and fulvic acid due to competition of reactive radical •OH. It demonstrated that oxidizing radical played important role in irradiation process. The appropriate addition of H2O2 and K2S2O8 providing with oxidizing agents •OH and •SO4- was favorable to improve degradation efficiency of CPC. The possible transformation pathways of CPC including cleavage of the ribofuranose sugar and defluorination were proposed based on intermediate products and were consistent with the theoretical calculation of charge and electron density distribution. Toxicity of CPC and intermediate products were estimated by ECOSAR program. It was found that CPC was transformed to low toxicity products with EB.
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Affiliation(s)
- Zhuhao Huo
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China
| | - Siqi Wang
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China
| | - Haiyang Shao
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China
| | - Hongyong Wang
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China
| | - Gang Xu
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China.
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16
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Sultana A, Meesungnoen J, Jay-Gerin JP. Yields of primary species in the low-linear energy transfer radiolysis of water in the temperature range of 25–700 °C. Phys Chem Chem Phys 2020; 22:7430-7439. [DOI: 10.1039/d0cp00601g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Monte Carlo track chemistry simulations were used to calculate the yields (G values) for the radical (eaq−, H˙, ˙OH) and molecular (H2, H2O2) species formed in low-LET water radiolysis from ∼1 ps to 1 ms between 25 and 700 °C, at 25 MPa pressure.
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Affiliation(s)
- Abida Sultana
- Département de Médecine Nucléaire et de Radiobiologie
- Faculté de Médecine et des Sciences de la Santé
- Université de Sherbrooke
- Sherbrooke
- Canada
| | - Jintana Meesungnoen
- Département de Médecine Nucléaire et de Radiobiologie
- Faculté de Médecine et des Sciences de la Santé
- Université de Sherbrooke
- Sherbrooke
- Canada
| | - Jean-Paul Jay-Gerin
- Département de Médecine Nucléaire et de Radiobiologie
- Faculté de Médecine et des Sciences de la Santé
- Université de Sherbrooke
- Sherbrooke
- Canada
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17
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Wang H, Zhou X, Huang Y, Chen X, Jin C. Interactions of sub-five-nanometer diameter colloidal palladium nanoparticles in solution investigated via liquid cell transmission electron microscopy. RSC Adv 2020; 10:34781-34787. [PMID: 35514409 PMCID: PMC9056814 DOI: 10.1039/d0ra05759b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 09/14/2020] [Indexed: 11/21/2022] Open
Abstract
Inter-particle interactions play important roles in controlling the structures, dispersion state and chemo-physical properties of colloidal nanoparticles (NPs) in liquid media. In this work, we prepared palladium (Pd) NPs with an average diameter of ∼4.6 nm in situ inside the liquid cell, and investigated their coupled diffusion and aggregation behaviors through liquid cell transmission electron microscopy (LCTEM). Via analyzing the interaction energies and forces, we derived the effective working range for repulsive double layer interaction experimentally, a value larger than two times the Debye length, suggesting a different interaction behavior of sub-5 nm NPs from that of colloidal NPs in larger sizes. Our results provide insights for the interactions between colloidal ultrafine nanoparticles in solution and will also shed light on the precisely controlled assembly of colloidal nanocrystals for practical applications. In this paper, sub-5 nm diameter palladium nanoparticles were prepared in situ inside the liquid cell, and the interactions between them were investigated via liquid cell transmission electron microscopy.![]()
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Affiliation(s)
- Haifeng Wang
- Institute of New Energy for Vehicles
- School of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- China
| | - Xiaoqin Zhou
- State Key Laboratory of Silicon Materials
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou
- China
| | - Yunhui Huang
- Institute of New Energy for Vehicles
- School of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- China
| | - Xin Chen
- Key Laboratory for Ultrafine Materials of Ministry of Education
- Shanghai Key Laboratory of Advanced Polymeric Materials
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Chuanhong Jin
- State Key Laboratory of Silicon Materials
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou
- China
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18
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Alkhuraiji TS. Effect of Co60 irradiation on the degradation and mineralization of sulfonated aromatic compounds in aqueous solutions. CHEMOSPHERE 2019; 228:769-777. [PMID: 31075640 DOI: 10.1016/j.chemosphere.2019.04.087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 03/29/2019] [Accepted: 04/12/2019] [Indexed: 06/09/2023]
Abstract
As sulfonated aromatic compounds are widely used in industry, they have frequently been detected in aquatic environments. This study evaluated the degradation and mineralization of 2,6-naphthalenedisulfonic acid disodium salt (2,6-NS), sodium 2-naphthalenesulfonate (2-NS), benzenesulfonic acid sodium salt (BS), and 4-vinylbenzene sulfonate sodium (4-VBS) by exposing aqueous solutions of these compounds to Co60 irradiation. The radiolytic degradation of these pollutants was found to follow pseudo-first-order kinetics. The dose required to achieve 90% degradation (D90) of these four sulfonated compounds was 0.480 (2,6-NS), 0.390 (2-NS), 0.194 (BS), and 0.280 kGy (4-VBS). The chemical radiolytic yield (Gvalue) decreased as the absorbed dose increased; moreover, the chemical structures of these compounds affected their radiolytic efficacy. No significant reduction in radiolytic degradation was observed in the presence of inorganic anions (SO42-, Cl-). The radiolytic degradation efficiency was higher when hydrogen peroxide (H2O2, a hydroxyl radical (OH) promoter) was added. The results also showed that combining H2O2, persulfate anions (S2O82-, a sulfate radical anion (SO4-) promoter), or N2O gas (a OH radical promoter) with the sulfonated compounds enhanced the radiolytic mineralization yield and process by reducing the required irradiation energy. In terms of the Co60/O2 system, at an absorbed dose of 12 kGy, the total organic carbon (TOC) removal efficiency was almost 70%, resulting in the observed release of SO42- anions. In addition, the concentration of dissolved oxygen decreased and the pH was lowered. Based on these results, irradiation with Co60 was found to be a useful tool to remedy wastewater containing sulfonated aromatic compounds.
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Affiliation(s)
- Turki S Alkhuraiji
- King Abdulaziz City for Science and Technology-KACST, Nuclear Science Research Institute-NSRI, National Center for Irradiation Technology-NCIT, P. O. BOX 6086, Riyadh, 11442, Saudi Arabia; King Abdulaziz City for Science and Technology-KACST, Innovation and Industrialization Affairs, Saudi-Chinese Center for Technology Transfer-SCCTT, P. O. BOX 6086, Riyadh, 11442, Saudi Arabia.
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19
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Janik I, Tripathi GNR. The selenocyanate dimer radical anion in water: Transient Raman spectra, structure, and reaction dynamics. J Chem Phys 2019; 150:094304. [PMID: 30849895 DOI: 10.1063/1.5086400] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The selenocyanate dimer radical anion (SeCN)2 •-, prepared by electron pulse irradiation of selenocyanate anion (SeCN)- in water, has been examined by transient absorption, time-resolved Raman spectra, and range-separated hybrid density functional (ωB97x and LC-ωPBE) theory. The Raman spectrum, excited in resonance with the 450 nm (λmax) absorption of the radical, is dominated by a very strong band at 140.5 cm-1, associated with the Se-Se stretching vibration, its overtones and combinations. A striking feature of the (SeCN)2 •- Raman spectrum is the relative sharpness of the 140.5 cm-1 band compared to the S-S band at 220 cm-1 in thiocyanate radical anion (SCN)2 •-, the difference of which is explained in terms of a time-averaged site effect. Calculations, which reproduce experimental frequencies fairly well, predict a molecular geometry with the SeSe bond length of 2.917 (±0.04) Å, the SeC bond length of 1.819 (±0.004) Å, and the CN bond length of 1.155 (±0.002) Å. An anharmonicity of 0.44 cm-1 has been determined for the 140.5 cm-1 Se-Se vibration which led to a dissociation energy of ∼1.4 eV for the SeSe bond, using the Morse potential in a diatomic approximation. This value, estimated for the radical confined in a solvent cage, compares well with the calculated gas-phase energy, 1.32 ± 0.04 eV, required for the radical to dissociate into (SeCN)• and (SeCN)- fragments. The enthalpy of dissociation in water has been measured (0.36 eV) and compared with the value estimated by accounting for the solvent dielectric effects in structural calculations.
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Affiliation(s)
- Ireneusz Janik
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - G N R Tripathi
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA
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20
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Fijołek L, Nawrocki J. Phosphate helps to recover from scavenging effect of chloride in self-enhanced ozonation. CHEMOSPHERE 2018; 212:802-810. [PMID: 30189407 DOI: 10.1016/j.chemosphere.2018.08.148] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 08/06/2018] [Accepted: 08/29/2018] [Indexed: 06/08/2023]
Abstract
Self-enhanced ozonation is a new approach for generation of hydroxyl radicals at low pH. Unfortunately at acidic environment chloride effectively scavenges the radicals. Therefore, the presence of chloride in ozonated medium would be detrimental for the most of the process practical applications. In self-enhanced ozonation process almost complete degradation of aromatics is observed during first 10min. Addition of 3.22 mM of chloride completely hinders degradation of nitrobenzene (NB) or benzoic acid (BA). This work shows that the scavenging effect of chlorides may be overcome with an excess of phosphate. Addition of 50 mM of phosphates to ozonated water brings back 74% removal of NB or 87% of BA, when 24 μM of compound is ozonated in the presence of 3.22 mM chloride during 60min. The excess of phosphate sufficient to overcome the scavenging activity of chloride in the self-enhanced ozonation of aromatic compounds at acidic pH is much lower than that implied by the reaction rates of both ions with hydroxyl radicals. To the best of our knowledge the recovering effect of phosphate has not been shown before.
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Affiliation(s)
- Lilla Fijołek
- Adam Mickiewicz University, Faculty of Chemistry, Department of Water Treatment Technology, 89b Umultowska st., 61-614, Poznań, Poland.
| | - Jacek Nawrocki
- Adam Mickiewicz University, Faculty of Chemistry, Department of Water Treatment Technology, 89b Umultowska st., 61-614, Poznań, Poland.
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21
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Gilles M, Brun E, Sicard-Roselli C. Quantification of hydroxyl radicals and solvated electrons produced by irradiated gold nanoparticles suggests a crucial role of interfacial water. J Colloid Interface Sci 2018; 525:31-38. [DOI: 10.1016/j.jcis.2018.04.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Revised: 03/09/2018] [Accepted: 04/04/2018] [Indexed: 12/26/2022]
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22
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Wang H, Nagamanasa KH, Kim YJ, Kwon OH, Granick S. Longer-Lasting Electron-Based Microscopy of Single Molecules in Aqueous Medium. ACS NANO 2018; 12:8572-8578. [PMID: 30019893 DOI: 10.1021/acsnano.8b04190] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Use of electron-based microscopy in aqueous media has been held back because aqueous samples tend to suffer from water radiolysis and other chemical degradation caused by the high energy of incident electrons. Here we show that aqueous liquid pockets in graphene liquid cells at room temperature display significantly improved stability when using deuterated water, D2O. Reporting transmission electron microscopy (TEM) experiments based on common imaging conditions, we conclude that use of D2O outperforms adding radical scavengers to H2O regardless of imaging details; it increases the lifetime of dissolved organic macromolecules by a factor of 2-5, and it delays by even longer the appearance of radiolysis-induced bubbles, by a factor of time up to 10. We quantify statistically the consequences of minimizing the electron voltage and dose and conclude that the D2O environment increases sample longevity without noticeable sacrifice of contrast that is critical for direct imaging of weakly scattering organic macromolecules and biomolecules.
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Affiliation(s)
- Huan Wang
- IBS Center for Soft and Living Matter , Ulsan 44919 , South Korea
| | | | - Ye-Jin Kim
- IBS Center for Soft and Living Matter , Ulsan 44919 , South Korea
- Department of Chemistry , UNIST , Ulsan 44919 , South Korea
| | - Oh-Hoon Kwon
- IBS Center for Soft and Living Matter , Ulsan 44919 , South Korea
- Department of Chemistry , UNIST , Ulsan 44919 , South Korea
| | - Steve Granick
- IBS Center for Soft and Living Matter , Ulsan 44919 , South Korea
- Department of Chemistry , UNIST , Ulsan 44919 , South Korea
- Department of Physics , UNIST , Ulsan 44919 , South Korea
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23
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Shao HY, Wu MH, Deng F, Xu G, Liu N, Li X, Tang L. Electron beam irradiation induced degradation of antidepressant drug fluoxetine in water matrices. CHEMOSPHERE 2018; 190:184-190. [PMID: 28987407 DOI: 10.1016/j.chemosphere.2017.09.133] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 09/01/2017] [Accepted: 09/27/2017] [Indexed: 06/07/2023]
Abstract
With the development of psychiatric disorder in the current society, abuse of antidepressant drug fluoxetine (FLX) has made such compound an emerging contaminant in natural waters, and causes endocrine systems disturbance on some aquatic species. Herein, an efficient advanced oxidation process (AOP), electron beam irradiation was carried out to investigate the decomposition characteristics of such novel environmental pollutant, including the effects of initial concentration, pH, radical scavengers and anions. The results showed that FLX degradation followed pseudo-first-order kinetics. The degradation rate and dose constant decreased with increasing initial FLX concentration; and G-values elevated with the increase of initial concentration but reduced with increase of absorbed dose. Acidic condition was more conducive to FLX destruction than neutral and alkaline. The radical scavenger experiments indicated OH was the main reactive species for the decomposition of FLX, while the reductive species e-aq and H played an adjuvant role. The presence of anions slightly decreased or even no impact on FLX degradation rate. Various water matrices influenced degradation processes of FLX. Experimental results suggested radiolytic degradation showed the best performance in pure water rather than natural water no matter with filtration or not. Moreover, with the occurrence of defluorination and dealkylation during degradation process, some organic and inorganic intermediates were detected, and the possible degradation mechanisms and pathways of FLX were proposed.
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Affiliation(s)
- Hai-Yang Shao
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China; Shanghai Environmental Monitoring Center, Shanghai, 200235, PR China
| | - Ming-Hong Wu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China.
| | - Fei Deng
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China
| | - Gang Xu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China
| | - Ning Liu
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, PR China
| | - Xu Li
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China
| | - Liang Tang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China.
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24
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Wang F, Wang W, Yuan S, Wang W, Hu ZH. Comparison of UV/H2O2 and UV/PS processes for the degradation of thiamphenicol in aqueous solution. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.08.023] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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25
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Park JH, Steingart DA, Kodambaka S, Ross FM. Electrochemical electron beam lithography: Write, read, and erase metallic nanocrystals on demand. SCIENCE ADVANCES 2017; 3:e1700234. [PMID: 28706992 PMCID: PMC5507638 DOI: 10.1126/sciadv.1700234] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Accepted: 06/12/2017] [Indexed: 05/08/2023]
Abstract
We develop a solution-based nanoscale patterning technique for site-specific deposition and dissolution of metallic nanocrystals. Nanocrystals are grown at desired locations by electron beam-induced reduction of metal ions in solution, with the ions supplied by dissolution of a nearby electrode via an applied potential. The nanocrystals can be "erased" by choice of beam conditions and regrown repeatably. We demonstrate these processes via in situ transmission electron microscopy using Au as the model material and extend to other metals. We anticipate that this approach can be used to deposit multicomponent alloys and core-shell nanostructures with nanoscale spatial and compositional resolutions for a variety of possible applications.
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Affiliation(s)
- Jeung Hun Park
- Department of Materials Science and Engineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA
- Department of Mechanical and Aerospace Engineering, and Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ 08544, USA
- IBM Thomas J. Watson Research Center, 1101 Kitchawan Road, Yorktown Heights, NY 10598, USA
| | - Daniel A. Steingart
- Department of Mechanical and Aerospace Engineering, and Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ 08544, USA
- Corresponding author. (D.A.S.); (S.K.); (F.M.R.)
| | - Suneel Kodambaka
- Department of Materials Science and Engineering, University of California, Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA
- Corresponding author. (D.A.S.); (S.K.); (F.M.R.)
| | - Frances M. Ross
- IBM Thomas J. Watson Research Center, 1101 Kitchawan Road, Yorktown Heights, NY 10598, USA
- Corresponding author. (D.A.S.); (S.K.); (F.M.R.)
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26
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Rivera-Utrilla J, Daiem MMA, Sánchez-Polo M, Ocampo-Pérez R, López-Peñalver JJ, Velo-Gala I, Mota AJ. Removal of compounds used as plasticizers and herbicides from water by means of gamma irradiation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 569-570:518-526. [PMID: 27366982 DOI: 10.1016/j.scitotenv.2016.06.114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 06/07/2016] [Accepted: 06/15/2016] [Indexed: 06/06/2023]
Abstract
Gamma radiation has been used to induce the degradation of compounds used as plasticizers and herbicides such as phthalic acid (PA), bisphenol A (BPA), diphenolic acid (DPA), 2,4-dichlorophenoxy-acetic acid (2,4-D), and 4-chloro-2-methylphenoxyacetic acid (MCPA) in aqueous solution, determining the dose constants, removal percentages, and radiation-chemical yields. The reaction rate constants of hydroxyl radical (HO), hydrated electron (eaq(-)) and hydrogen atom (H) with these pollutants were also obtained by means of competition kinetics, using 3-aminopyridine and atrazine as reference compounds. The results indicated that the elimination of these pollutants with gamma radiation mainly follows the oxidative pathway through reaction with HO radicals. The degradation by-products from the five pollutants were determined, detecting that the hydroxylation of the corresponding parent compounds was the main chemical process in the degradation of the pollutants. Moreover, a high decrease in the chemical oxygen demand has been observed for all pollutants. As expected, the degradation by-products generated by the irradiation of PA, BPA and DPA showed a lower toxicity than the parent compounds, however, in the case of 2,4-D and MCPA irradiation, interestingly, their by-products were more toxic than the corresponding original compounds.
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Affiliation(s)
- José Rivera-Utrilla
- Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain.
| | - Mahmoud M Abdel Daiem
- Environmental Engineering Department, Faculty of Engineering, Zagazig University, 44519 Zagazig, Egypt
| | - Manuel Sánchez-Polo
- Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - Raúl Ocampo-Pérez
- Center of Research and Postgraduate Studies, Faculty of Chemical Science, Autonomous University of San Luis Potosí, Av. Dr. M. Nava No.6, San Luis Potosí SLP 78210, Mexico
| | - Jesús J López-Peñalver
- Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - Inmaculada Velo-Gala
- Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - Antonio J Mota
- Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain
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27
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Wu J, Shan H, Chen W, Gu X, Tao P, Song C, Shang W, Deng T. In Situ Environmental TEM in Imaging Gas and Liquid Phase Chemical Reactions for Materials Research. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:9686-9712. [PMID: 27628711 DOI: 10.1002/adma.201602519] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/10/2016] [Indexed: 05/26/2023]
Abstract
Gas and liquid phase chemical reactions cover a broad range of research areas in materials science and engineering, including the synthesis of nanomaterials and application of nanomaterials, for example, in the areas of sensing, energy storage and conversion, catalysis, and bio-related applications. Environmental transmission electron microscopy (ETEM) provides a unique opportunity for monitoring gas and liquid phase reactions because it enables the observation of those reactions at the ultra-high spatial resolution, which is not achievable through other techniques. Here, the fundamental science and technology developments of gas and liquid phase TEM that facilitate the mechanistic study of the gas and liquid phase chemical reactions are discussed. Combined with other characterization tools integrated in TEM, unprecedented material behaviors and reaction mechanisms are observed through the use of the in situ gas and liquid phase TEM. These observations and also the recent applications in this emerging area are described. The current challenges in the imaging process are also discussed, including the imaging speed, imaging resolution, and data management.
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Affiliation(s)
- Jianbo Wu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Hao Shan
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Wenlong Chen
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Xin Gu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Peng Tao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Chengyi Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Wen Shang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Tao Deng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
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28
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Vega E, Sánchez-Polo M, Gonzalez-Olmos R, Martin MJ. Adsorption of odorous sulfur compounds onto activated carbons modified by gamma irradiation. J Colloid Interface Sci 2015; 457:78-85. [DOI: 10.1016/j.jcis.2015.06.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/28/2015] [Accepted: 06/23/2015] [Indexed: 10/23/2022]
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29
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Chee SW, Pratt SH, Hattar K, Duquette D, Ross FM, Hull R. Studying localized corrosion using liquid cell transmission electron microscopy. Chem Commun (Camb) 2015; 51:168-71. [DOI: 10.1039/c4cc06443g] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Localized corrosion of Cu and Al thin films exposed to aqueous NaCl solutions was studied using liquid cell TEM. We demonstrate that potentiostatic control can be used to initiate pitting and that local compositional changes, due to FIB implantation of Au+ions, can modify the corrosion susceptibility of Al films.
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Affiliation(s)
- See Wee Chee
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | | | | | - David Duquette
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | | | - Robert Hull
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
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30
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Sanguanmith S, Meesungnoen J, Jay-Gerin JP. Time-dependent yield of OH radicals in the low linear energy transfer radiolysis of water between 25 and 350 °C. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.09.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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31
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El Omar AK, Schmidhammer U, Rousseau B, LaVerne J, Mostafavi M. Competition Reactions of H2O•+ Radical in Concentrated Cl– Aqueous Solutions: Picosecond Pulse Radiolysis Study. J Phys Chem A 2012; 116:11509-18. [DOI: 10.1021/jp309381z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Abdel Karim El Omar
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS/Université Paris—Sud 11, Orsay, France
| | - Uli Schmidhammer
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS/Université Paris—Sud 11, Orsay, France
| | - Bernard Rousseau
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS/Université Paris—Sud 11, Orsay, France
| | - Jay LaVerne
- Radiation
Laboratory and Department
of Physics, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Mehran Mostafavi
- Laboratoire de Chimie Physique/ELYSE,
UMR 8000 CNRS/Université Paris—Sud 11, Orsay, France
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32
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Djouider F. Radiolytic formation of non-toxic Cr(III) from toxic Cr(VI) in formate containing aqueous solutions: A system for water treatment. JOURNAL OF HAZARDOUS MATERIALS 2012; 223-224:104-109. [PMID: 22595544 DOI: 10.1016/j.jhazmat.2012.04.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 03/23/2012] [Accepted: 04/25/2012] [Indexed: 05/31/2023]
Abstract
Toxic hexavalent chromium Cr(VI) in the form of potassium dichromate was radiolytically reduced to non-toxic trivalent chromium Cr(III) in N(2)O-saturated aqueous solutions containing formate. This reduction by the electron donor (CO(2)H/CO(2)(-)) produced by continuous radiolysis of water, was a linear function of the absorbed dose. This reaction was pH and dose rate dependent. pH was an important parameter in the reduction, as it affects both chemical speciation of Cr(VI) and formate. Possible mechanisms related to dose rate dependence of removal of Cr(VI) are presented. At pH 3 a decrease in the radiation induced reduction of Cr(VI) was observed with increasing hydrogen peroxide concentration. A mechanism to account for this variation is proposed. These findings suggest that irradiation of Cr(VI) solutions in presence of formate can be effective, economical and simple means for treatment of waste water contaminated with hexavalent Cr(VI).
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Affiliation(s)
- Fathi Djouider
- Nuclear Engineering Department, Faculty of Engineering, King Abdulaziz University, P.O. Box 80204, Jeddah 21589, Saudi Arabia.
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33
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El Omar AK, Schmidhammer U, Jeunesse P, Larbre JP, Lin M, Muroya Y, Katsumura Y, Pernot P, Mostafavi M. Time-dependent radiolytic yield of OH• radical studied by picosecond pulse radiolysis. J Phys Chem A 2011; 115:12212-6. [PMID: 21970432 DOI: 10.1021/jp208075v] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Picosecond pulse radiolysis measurements using a pulse-probe method are performed to measure directly the time-dependent radiolytic yield of the OH(•) radical in pure water. The time-dependent absorbance of OH(•) radical at 263 nm is deduced from the observed signal by subtracting the contribution of the hydrated electron and that of the irradiated empty fused silica cell which presents also a transient absoption. The time-dependent radiolytic yield of OH(•) is obtained by assuming the yield of the hydrated electron at 20 ps equal to 4.2 × 10(-7) mol J(-1) and by assuming the values of the extinction coefficients of e(aq)(-) and OH(•) at 782 nm (ε(λ=782 nm) = 17025 M(-1) cm(-1)) and at 263 nm (ε(λ=263 nm) = 460 M(-1) cm(-1)), respectively. The value of the yield of OH(•) radical at 10 ps is found to be (4.80 ± 0.12) × 10(-7) mol J(-1).
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Affiliation(s)
- Abdel Karim El Omar
- Laboratoire de Chimie Physique/ELYSE, UMR 8000 CNRS/Université Paris-Sud 11, Faculté des Sciences d'Orsay, Orsay, France
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34
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Balcerzyk A, Schmidhammer U, El Omar AK, Jeunesse P, Larbre JP, Mostafavi M. Picosecond pulse radiolysis of direct and indirect radiolytic effects in highly concentrated halide aqueous solutions. J Phys Chem A 2011; 115:9151-9. [PMID: 21770462 DOI: 10.1021/jp203609e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Recently we measured the amount of the single product, Br(3)(-), of steady-state radiolysis of highly concentrated Br(-) aqueous solutions, and we showed the effect of the direct ionization of Br(-) on the yield of Br(3)(-). Here, we report the first picosecond pulse-probe radiolysis measurements of ionization of highly concentrated Br(-) and Cl(-) aqueous solutions to describe the oxidation mechanism of the halide anions. The transient absorption spectra are reported from 350 to 750 nm on the picosecond range for halide solutions at different concentrations. In the highly concentrated halide solutions, we observed that, due to the presence of Na(+), the absorption band of the solvated electron is shifted to shorter wavelengths, but its decay, taking place during the spur reactions, is not affected within the first 4 ns. The kinetic measurements in the UV reveal the direct ionization of halide ions. The analysis of pulse-probe measurements show that after the electron pulse, the main reactions in solutions containing 1 M of Cl(-) and 2 M of Br(-) are the formation of ClOH(-•) and BrOH(-•), respectively. In contrast, in highly concentrated halide solutions, containing 5 M of Cl(-) and 6 M of Br(-), mainly Cl(2)(-•) and Br(2)(-•) are formed within the electron pulse without formation of ClOH(-•) and BrOH(-•). The results suggest that, not only Br(-) and Cl(-) are directly ionized into Br(•) and Cl(•) by the electron pulse, the halide atoms can also be rapidly generated through the reactions initiated by excitation and ionization of water, such as the prompt oxidation by the hole, H(2)O(+•), generated in the coordination sphere of the anion.
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Affiliation(s)
- Anna Balcerzyk
- Laboratoire de Chimie Physique, UMR 8000, CNRS/Université Paris-Sud 11, France
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35
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Balcerzyk A, LaVerne J, Mostafavi M. Direct and Indirect Radiolytic Effects in Highly Concentrated Aqueous Solutions of Bromide. J Phys Chem A 2011; 115:4326-33. [DOI: 10.1021/jp2012528] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna Balcerzyk
- Laboratoire de Chimie Physique, UMR 8000 CNRS/Université Paris-Sud 11, Faculté des Sciences d’Orsay, Bât. 349, 91405 Orsay Cedex, France
| | - Jay LaVerne
- Radiation Laboratory and Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mehran Mostafavi
- Laboratoire de Chimie Physique, UMR 8000 CNRS/Université Paris-Sud 11, Faculté des Sciences d’Orsay, Bât. 349, 91405 Orsay Cedex, France
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36
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Fischer MK, Gliserin A, Laubereau A, Iglev H. Ultrafast electron transfer processes studied by pump-repump-probe spectroscopy. JOURNAL OF BIOPHOTONICS 2011; 4:178-183. [PMID: 21287690 DOI: 10.1002/jbio.201000099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Accepted: 10/07/2010] [Indexed: 05/30/2023]
Abstract
The photodetachment of Br(-), I(-) and OH(-) in aqueous solution is studied by 2- and 3-pulse femtosecond spectroscopy. The UV excitation leads to fast electron separation followed by formation of a donor-electron pairs. An additional repump pulse is used for secondary excitation of the intermediates. The 3-pulse technique allows distinguishing the pair-intermediate from the fully separated electron. Using this method we observe a novel geminate recombination channel of .OH with adjacent hydrated electrons. The process leads to an ultrafast quenching (0.7 ps) of almost half the initial number of radicals. The phenomenon is not observed in Br(-) and I(-). Our results demonstrate the potential of the 3-pulse spectroscopy to elucidate the mechanism of ultrafast ET reactions. Photodetachment of aqueous anions studied by two- and three pulse spectroscopy.
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Affiliation(s)
- Martin K Fischer
- Physics Department E11, Technical University Munich, Munich, Germany
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37
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Iglev H, Fischer MK, Gliserin A, Laubereau A. Ultrafast Geminate Recombination after Photodetachment of Aqueous Hydroxide. J Am Chem Soc 2010; 133:790-5. [DOI: 10.1021/ja103866s] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Hristo Iglev
- Physik-Department E11, Technische Universität München, D-85748 Garching, Germany
| | - Martin K. Fischer
- Physik-Department E11, Technische Universität München, D-85748 Garching, Germany
| | - Alexander Gliserin
- Physik-Department E11, Technische Universität München, D-85748 Garching, Germany
| | - Alfred Laubereau
- Physik-Department E11, Technische Universität München, D-85748 Garching, Germany
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38
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Schmidhammer U, Pernot P, Waele VD, Jeunesse P, Demarque A, Murata S, Mostafavi M. Distance Dependence of the Reaction Rate for the Reduction of Metal Cations by Solvated Electrons: A Picosecond Pulse Radiolysis Study. J Phys Chem A 2010; 114:12042-51. [DOI: 10.1021/jp107278w] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Uli Schmidhammer
- Laboratoire de Chimie Physique-ELYSE, UMR8000 CNRS, Université Paris Sud, 91405 Orsay, France and National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Pascal Pernot
- Laboratoire de Chimie Physique-ELYSE, UMR8000 CNRS, Université Paris Sud, 91405 Orsay, France and National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Vincent De Waele
- Laboratoire de Chimie Physique-ELYSE, UMR8000 CNRS, Université Paris Sud, 91405 Orsay, France and National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Pierre Jeunesse
- Laboratoire de Chimie Physique-ELYSE, UMR8000 CNRS, Université Paris Sud, 91405 Orsay, France and National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Alexandre Demarque
- Laboratoire de Chimie Physique-ELYSE, UMR8000 CNRS, Université Paris Sud, 91405 Orsay, France and National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Shigeo Murata
- Laboratoire de Chimie Physique-ELYSE, UMR8000 CNRS, Université Paris Sud, 91405 Orsay, France and National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Mehran Mostafavi
- Laboratoire de Chimie Physique-ELYSE, UMR8000 CNRS, Université Paris Sud, 91405 Orsay, France and National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
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39
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Djouider F, Aljohani MS. Application of ionizing radiation to environmental protection: removal of toxic Cr(VI) metal ion in industrial wastewater: preliminary study. J Radioanal Nucl Chem 2010. [DOI: 10.1007/s10967-010-0594-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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40
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Atinault E, De Waele V, Belloni J, Le Naour C, Fattahi M, Mostafavi M. Radiolytic Yield of UIV Oxidation into UVI: A New Mechanism for UV Reactivity in Acidic Solution. J Phys Chem A 2010; 114:2080-5. [DOI: 10.1021/jp9051177] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- E. Atinault
- Laboratoire de Chimie Physique/ELYSE, CNRS-Université Paris-Sud, Bât. 349, 91405 Orsay, France, SUBATECH, Ecole des Mines de Nantes, Université de Nantes, 44307 Nantes, France, and Institut de Physique Nucléaire, CNRS-Université Paris-Sud, Bât. 100, 91406 Orsay, France
| | - V. De Waele
- Laboratoire de Chimie Physique/ELYSE, CNRS-Université Paris-Sud, Bât. 349, 91405 Orsay, France, SUBATECH, Ecole des Mines de Nantes, Université de Nantes, 44307 Nantes, France, and Institut de Physique Nucléaire, CNRS-Université Paris-Sud, Bât. 100, 91406 Orsay, France
| | - J. Belloni
- Laboratoire de Chimie Physique/ELYSE, CNRS-Université Paris-Sud, Bât. 349, 91405 Orsay, France, SUBATECH, Ecole des Mines de Nantes, Université de Nantes, 44307 Nantes, France, and Institut de Physique Nucléaire, CNRS-Université Paris-Sud, Bât. 100, 91406 Orsay, France
| | - C. Le Naour
- Laboratoire de Chimie Physique/ELYSE, CNRS-Université Paris-Sud, Bât. 349, 91405 Orsay, France, SUBATECH, Ecole des Mines de Nantes, Université de Nantes, 44307 Nantes, France, and Institut de Physique Nucléaire, CNRS-Université Paris-Sud, Bât. 100, 91406 Orsay, France
| | - M. Fattahi
- Laboratoire de Chimie Physique/ELYSE, CNRS-Université Paris-Sud, Bât. 349, 91405 Orsay, France, SUBATECH, Ecole des Mines de Nantes, Université de Nantes, 44307 Nantes, France, and Institut de Physique Nucléaire, CNRS-Université Paris-Sud, Bât. 100, 91406 Orsay, France
| | - M. Mostafavi
- Laboratoire de Chimie Physique/ELYSE, CNRS-Université Paris-Sud, Bât. 349, 91405 Orsay, France, SUBATECH, Ecole des Mines de Nantes, Université de Nantes, 44307 Nantes, France, and Institut de Physique Nucléaire, CNRS-Université Paris-Sud, Bât. 100, 91406 Orsay, France
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41
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De Waele V, Schmidhammer U, Marquès JR, Monard H, Larbre JP, Bourgeois N, Mostafavi M. Non-invasive single bunch monitoring for ps pulse radiolysis. Radiat Phys Chem Oxf Engl 1993 2009. [DOI: 10.1016/j.radphyschem.2009.06.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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42
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Liu H, Zhao H, Quan X, Zhang Y, Chen S. Formation of chlorinated intermediate from bisphenol A in surface saline water under simulated solar light irradiation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2009; 43:7712-7717. [PMID: 19921883 DOI: 10.1021/es900811c] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Chlorinated organic compounds are generally of great concern, but many uncertainties exist regarding how they are generated. To illustrate the possibility of photochemical formation of organochlorine compounds in natural water, the phototransformation of bisphenol A (BPA) in aqueous saline solution containing Fe(lll) and fulvic acid (FA), and in coastal seawater under simulated solar light irradiation was investigated. 2-(3-Chloro-4-hydroxyphenyl)-2-(4-hydroxyphenyl) propane (3-CIBPA) and 2,2-bis(3-chloro-4-hydroxyphenyl) propane (3,3-diCIBPA) were the main chlorinated derivatives during the processes. Laser flash photolysis (LFP) and electron spin resonance (ESR) results indicated that the chlorination of BPA was most likely due to the formation of Cl2(*-) radical as a consequence of Fe(III) irradiation, yielding Cl* and OH* radical species and finally forming Cl2(*-) radical upon further reaction with chloride. The formation of Fe(III)-FA complex, which is a normal coexistence configuration of Fe(III) and FA in natural water, promoted the BPA chlorination through producing more Cl2(*-) radical. Moreover, FA had two opposite effects: forming Fe(III)-FA complex to enhance Cl2(*-) formation and competing radicals with BPA, which resulted in different overall effects at different concentrations: BPA chlorination was enhanced with the increasing of FA concentration ([FA]) when [FA] < 3.2 mg L(-1); when the concentration of FA was as high as 10 mg L(-1), it slowed down obviously. The described BPA photochlorination process took place from pH 6.3 to 8.5 and increased with the increasing of chloride concentration, indicating it could occur universally in natural saline surface water. These results propose a natural photochemical source for organochlorine compounds.
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Affiliation(s)
- Hui Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian, China
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43
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Atinault E, De Waele V, Fattahi M, LaVerne JA, Pimblott SM, Mostafavi M. Aqueous solution of UCl6(2-) in O2 saturated acidic medium: an efficient system to scavenge all primary radicals in spurs produced by irradiation. J Phys Chem A 2009; 113:949-51. [PMID: 19159206 DOI: 10.1021/jp810579x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Absorbance measurements find the yield of the oxidation of U(IV) to be (8.75 +/- 0.05) x 10(-7) mol J(-1) in the (60)Co gamma radiolysis of aqueous solutions containing 4.4 x 10(-3) mol L(-1) U(IV) in the presence of O(2) saturated 2 mol L(-1) Cl(-) at pH = 0. This high value of oxidation yield suggests that all primary radicals formed by water decomposition are scavenged in these solutions. Simulations using a nonhomogeneous stochastic kinetic track model agree with the experimental results and are used to explain the mechanism for scavenging radicals and oxidation of U(IV).
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44
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Mirdamadi-Esfahani M, Lampre I, Marignier JL, de Waele V, Mostafavi M. Radiolytic formation of tribromine ion Br3− in aqueous solutions, a system for steady-state dosimetry. Radiat Phys Chem Oxf Engl 1993 2009. [DOI: 10.1016/j.radphyschem.2008.08.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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