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Guadalupe A, Rosalba RM, Edith M. Oxidation of halobenzenes by OH radical produced radiolytically in aqueous solution. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109525] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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2
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Zhu Y, Zhu M, Xie J, Hu Y, Liu Y, Zhu C. Photochemical reaction kinetics and mechanism of bisphenol A with K 2S 2O 8 in aqueous solution: a laser flash photolysis study. CAN J CHEM 2021. [DOI: 10.1139/cjc-2019-0485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The photochemical reaction kinetics and mechanism of bisphenol A (BPA) with potassium persulfate (K2S2O8) were investigated by using 266 nm laser flash photolysis and gas chromatography mass spectrum (GC-MS) technique. Sulfate radical (SO4•−), generated upon K2S2O8 photolysis, reacted with BPA with the overall rate constant of (1.61 ± 0.15) × 109 L mol−1 s−1, and two main reaction mechanisms were involved. One was addition channel to generate BPA–SO4•− adduct with a specific second-order rate constant of (1.09 ± 0.15) × 109 L mol−1 s−1. Molecular oxygen was involved in the decay of the BPA–SO4•− adduct with a rate constant of (1.28 ± 0.14) × 108 L mol−1 s−1. Another channel was the formation of BPA’s phenoxyl radical, likely derived from a deprotonation of the cation radical (BPA•+) generated from single electron transfer reactions. The specific rate constant of BPA’s phenoxyl radical formation was determined to be (6.16 ± 0.08) × 108 L mol−1 s−1. The overall rate constant was in line with the sum of aforementioned two specific rate constants for two main reaction channels. By comparing these rate constants, it was indicated that SO4•− addition channel accounted for ∼65% (1.09/1.61) to the overall reaction, and phenoxyl radical formation accounted for only ∼35% (0.62/1.61). The transformation products of BPA were identified by using GC-MS including 4-isopropylphenol, 4-isopropenylphenol, and 2,4-di-tert-butylphenol, and the reaction mechanism was proposed. These results may provide microscopic kinetics and mechanism information on BPA degradation using SO4•−-based advanced oxidation processes.
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Affiliation(s)
- Yongchao Zhu
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, P.R. China
- Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, P.R. China
- Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, P.R. China
| | - Mengyu Zhu
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, P.R. China
- Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, P.R. China
- Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, P.R. China
| | - Jingjing Xie
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, P.R. China
- Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, P.R. China
| | - Yadong Hu
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, P.R. China
- Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, P.R. China
- Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, P.R. China
| | - Ying Liu
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, P.R. China
- Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, P.R. China
- Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, P.R. China
| | - Chengzhu Zhu
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, P.R. China
- Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, P.R. China
- Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, P.R. China
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Liu Y, Yan S, Lian L, Ma J, Zhou H, Song W. Assessing the contribution of hydroxylation species in the photochemical transformation of primidone (pharmaceutical). THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 696:133826. [PMID: 31450049 DOI: 10.1016/j.scitotenv.2019.133826] [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: 05/26/2019] [Revised: 07/24/2019] [Accepted: 08/06/2019] [Indexed: 06/10/2023]
Abstract
Pharmaceutical and personal care products (PPCPs) are a group of emerging contaminants that have frequently been detected in aqueous environments. Phototransformation driven by solar irradiation is one of the most important natural processes for the elimination of PPCPs. In this study, primidone (PMD) was chosen as a model "photorefractory" compound. A series of experiments were conducted to assess if reactive intermediates (RIs), such as hydroxyl radical (HO), singlet oxygen (1O2), and triplet states of dissolved organic matter (3DOM⁎), inhibited or enhanced the photochemical transformation of PMD under simulated solar irradiation. The results indicate that HO plays a key role in the photodegradation of PMD and that dissolved oxygen can affect the degradation rate of PMD by promoting HO formation. Our results demonstrated that PMD can not only react with free HO (HO-free) but also react with lower-energy hydroxylation agents (HO-like). The contributions of HO-free and HO-like to PMD degradation in various dissolved organic matter (DOM) solutions were estimated by a methane-quenching experiment. The results indicated that the HO-like species were important in the photodegradation of "photorefractory" compounds. The bimolecular reaction rate constant of the reaction of free HO with PMD was measured as (5.21 ± 0.02) × 109 M-1 s-1 by using electron pulse radiolysis. Furthermore, PMD was used as a probe to estimate the steady-state concentration of HO-free in various DOM solutions. Using the multivariate statistical strategies of orthogonal projection to latent structures discriminant analysis (OPLS-DA) and hierarchical clustering, 28 photochemical transformation products (TPs) of PMD were successfully identified from the DOM matrix.
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Affiliation(s)
- Yingjie Liu
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China
| | - Shuwen Yan
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
| | - Lushi Lian
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China
| | - Jianzhong Ma
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China
| | - Huaxi Zhou
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China
| | - Weihua Song
- Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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Mártire DO, Gonzalez MC. Aqueous Phase Kinetic Studies Involving Intermediates of Environmental Interest: Phosphate Radicals and Their Reactions with Substituted Benzenes. PROGRESS IN REACTION KINETICS AND MECHANISM 2019. [DOI: 10.3184/007967401103165253] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This manuscript describes our research work devoted to the understanding of the aqueous phase reactions of phosphate and polyphosphate radicals. Inorganic phosphate and polyphosphate radicals were generated after photolysis of peroxo-diphosphate, tripolyphosphate and pyrophosphate ions. The reactions of SO4•-radicals with P2O74- and P3O105- are also discussed. The logarithm of the bimolecular rate constants for the reactions of the three phosphate radicals (H2PO4• HPO4•- PO4•2-) with substituted benzenes are discussed in terms of Hammett correlations and a reaction mechanism is proposed. Phenoxyl type radical formation from the reactions of H2PO4• and HPO4•- radicals with phenol, chlorobenzene, and α, α, α-trifluorotoluene (TFT) supports the contribution of an addition pathway yielding a phosphate adduct with the substituted benzene. Additional information on the absorption spectra and decay kinetics of the hydroxycyclohexadienyl radicals of chlorobenzene and TFT is also given.
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Affiliation(s)
- Daniel O. Mártire
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, (1900) La Plata, Argentina
| | - Mónica C. Gonzalez
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, (1900) La Plata, Argentina
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5
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Menachery SPM, Nguyen TP, Gopinathan P, Aravind UK, Aravindakumar CT. Exploring the mechanism of diphenylmethanol oxidation: A combined experimental and theoretical approach. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.08.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Luo S, Wei Z, Spinney R, Villamena FA, Dionysiou DD, Chen D, Tang CJ, Chai L, Xiao R. Quantitative structure-activity relationships for reactivities of sulfate and hydroxyl radicals with aromatic contaminants through single-electron transfer pathway. JOURNAL OF HAZARDOUS MATERIALS 2018; 344:1165-1173. [PMID: 28964582 DOI: 10.1016/j.jhazmat.2017.09.024] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 08/16/2017] [Accepted: 09/12/2017] [Indexed: 05/06/2023]
Abstract
Sulfate radical anion (SO4•-) and hydroxyl radical (OH) based advanced oxidation technologies has been extensively used for removal of aromatic contaminants (ACs) in waters. In this study, we investigated the Gibbs free energy (ΔGSET∘) of the single electron transfer (SET) reactions for 76 ACs with SO4•- and OH, respectively. The result reveals that SO4•- possesses greater propensity to react with ACs through the SET channel than OH. We hypothesized that the electron distribution within the molecule plays an essential role in determining the ΔGSET∘ and subsequent SET reactions. To test the hypothesis, a quantitative structure-activity relationship (QSAR) model was developed for predicting ΔGSET∘ using the highest occupied molecular orbital energies (EHOMO), a measure of electron distribution and donating ability. The standardized QSAR models are reported to be ΔG°SET=-0.97×EHOMO - 181 and ΔG°SET=-0.97×EHOMO - 164 for SO4•- and OH, respectively. The models were internally and externally validated to ensure robustness and predictability, and the application domain and limitations were discussed. The single-descriptor based models account for 95% of the variability for SO4•- and OH. These results provide the mechanistic insight into the SET reaction pathway of radical and non-radical bimolecular reactions, and have important applications for radical based oxidation technologies to remove target ACs in different waters.
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Affiliation(s)
- Shuang Luo
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Zongsu Wei
- Grand Water Research Institute - Rabin Desalination Laboratory, Wolfson Faculty of Chemical Engineering, Technion - Israel Institute of Technology, Technion City, Haifa, 32000, Israel
| | - Richard Spinney
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43210, USA
| | - Frederick A Villamena
- Department of Biological Chemistry and Pharmacology and The Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, 43210, USA
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH, 45221, USA
| | - Dong Chen
- Department of Civil and Mechanical Engineering, Indiana University-Purdue University Fort Wayne, Fort Wayne, IN, 46805, USA
| | - Chong-Jian Tang
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Liyuan Chai
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Ruiyang Xiao
- Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China.
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7
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Ma J, Zhu C, Lu J, Wang T, Hu S, Chen T. Photochemical reaction between biphenyl and N(III) in the atmospheric aqueous phase. CHEMOSPHERE 2017; 167:462-468. [PMID: 27750170 DOI: 10.1016/j.chemosphere.2016.10.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 10/02/2016] [Accepted: 10/03/2016] [Indexed: 06/06/2023]
Abstract
The photochemical reaction between biphenyl (Bp) and N(III) under irradiation at 365 nm UV light was investigated. The results showed that Bp conversion efficiency was strongly influenced by N (III) concentration, Bp initial concentration and pH. Species-specific rate constants determined by reaction of Bp with H2ONO+ (k1), HONO (k2) and NO2- (k3) were k1 = (0.058 ± 0.005 L mol-1 s-1), k2 = (0.12 ± 0.06 L mol-1 s-1) and k3 = (0.0019 ± 0.0003 L mol-1 s-1), respectively. Laser flash photolysis studies confirmed that OH radical deriving from the photolysis of N(III) attacked aromatic ring to form Bp-OH adduct with a rate constant of 9.4 × 109 L mol-1 s-1. The products analysis suggested that Bp-OH adduct could be nitrated by N (III) and NO2 to generate nitro-compounds.
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Affiliation(s)
- Jianzhong Ma
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China; Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, PR China
| | - Chengzhu Zhu
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China; Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, PR China.
| | - Jun Lu
- Center of Analysis & Measurement, Hefei University of Technology, Hefei 230009, PR China
| | - Tao Wang
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China; Institute of Atmospheric Environment & Pollution Control, Hefei University of Technology, Hefei 230009, PR China
| | - Shuheng Hu
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China
| | - Tianhu Chen
- School of Resource and Environmental Engineering, Hefei University of Technology, Hefei 230009, PR China
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8
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Menachery SPM, Nair SR, Nair PG, Aravind UK, Aravindakumar CT. Transformation Reactions of Radicals from the Oxidation of Diphenhydramine: Pulse Radiolysis and Mass Spectrometric Studies. ChemistrySelect 2016. [DOI: 10.1002/slct.201600103] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Sunil Paul M. Menachery
- School of Environmental Sciences; Mahatma Gandhi University; Priyadarsini Hills Kottayam, Kerala India
| | - Sreekanth R. Nair
- School of Chemical Sciences; Mahatma Gandhi University; Priyadarsini Hills Kottayam, Kerala India
| | - Pramod G. Nair
- Department of Chemistry; N.S.S. Hindu College; Changanachery Kerala India
| | - Usha K. Aravind
- Advanced Centre of Environmental Studies and Sustainable Development (ACESSD); Mahatma Gandhi University; Priyadarsini Hills Kottayam, Kerala India
| | - Charuvila T. Aravindakumar
- School of Environmental Sciences; Mahatma Gandhi University; Priyadarsini Hills Kottayam, Kerala India
- Inter University Instrumentation Centre (IUIC); Mahatma Gandhi University; Priyadarsini Hills Kottayam, Kerala India
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9
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Sharma J, Mishra IM, Kumar V. Mechanistic study of photo-oxidation of Bisphenol-A (BPA) with hydrogen peroxide (H2O2) and sodium persulfate (SPS). JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 166:12-22. [PMID: 26468603 DOI: 10.1016/j.jenvman.2015.09.043] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Revised: 09/15/2015] [Accepted: 09/27/2015] [Indexed: 05/20/2023]
Abstract
The removal of Bisphenol-A (BPA) from contaminated water using advanced oxidation methods such as UV-C assisted oxidation by hydrogen peroxide (H2O2) and sodium persulfate (SPS) has been reported by the authors earlier (Sharma et al., 2015a). In the present study, the authors report the removal of BPA from aqueous solution by the above two methods and its degradation mechanism. UV-C light (254 nm wavelength, 40 W power) was applied to BPA contaminated water at natural pH (pHN) under room temperature conditions. Experiments were carried out with the initial BPA concentration in the range of 0.04 mM-0.31 mM and the oxidant/BPA molar ratio in the range of 294:1-38:1 for UV-C/H2O2 and 31.5-4.06:1 for UV-C/SPS systems. The removal of BPA enhanced with decreasing BPA concentration. The total organic carbon also decreased with the UV-C irradiation time under optimum conditions ([H2O2]0 = 11.76 mM; [SPS]0 = 1.26 mM; temperature (29 ± 3 °C). Competition of BPA for reaction with HO or [Formula: see text] radicals at its higher concentrations results in a decrease in the removal of BPA. The intermediates with smaller and higher molecular weights than that of BPA were found in the treated water. Based on GC-MS and FTIR spectra of the reaction mixture, the formation of hydroxylated by-products testified the HO mediated oxidation pathway in the BPA degradation, while the formation of quinones and phenoxy phenols pointed to the [Formula: see text] dominating pathway through the formation of hydroxycyclohexadienyl (HCHD) and BPA phenoxyl radicals. The main route of BPA degradation is the hydroxylation followed by dehydration, coupling and ring opening reactions.
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Affiliation(s)
- Jyoti Sharma
- Department of Chemical Engineering, Indian Institute of Technology, Roorkee, Roorkee, 247667, India
| | - I M Mishra
- Department of Chemical Engineering, Indian Institute of Technology, Roorkee, Roorkee, 247667, India; Department of Chemical Engineering, Indian School of Mines, Dhanbad, Jharkhand, India.
| | - Vineet Kumar
- Department of Chemical Engineering, Indian School of Mines, Dhanbad, Jharkhand, India
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Yu H, Nie E, Xu J, Yan S, Cooper WJ, Song W. Degradation of diclofenac by advanced oxidation and reduction processes: kinetic studies, degradation pathways and toxicity assessments. WATER RESEARCH 2013; 47:1909-18. [PMID: 23384514 DOI: 10.1016/j.watres.2013.01.016] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 12/31/2012] [Accepted: 01/09/2013] [Indexed: 05/19/2023]
Abstract
Many pharmaceutical compounds and metabolites are found in surface and ground waters suggesting their ineffective removal by conventional wastewater treatment technologies. Advanced oxidation/reduction processes (AO/RPs), which utilize free radical reactions to directly degrade chemical contaminants, are alternatives to traditional water treatment. This study reports the absolute rate constants for reaction of diclofenac sodium and model compound (2, 6-dichloraniline) with the two major AO/RP radicals: the hydroxyl radical (•OH) and hydrated electron (e(aq)(-)). The bimolecular reaction rate constants (M(-1) s(-1)) for diclofenac for •OH was (9.29 ± 0.11) × 10(9), and for e(-)(aq) was (1.53 ± 0.03) ×10(9). To provide a better understanding of the decomposition of the intermediate radicals produced by hydroxyl radical reactions, transient absorption spectra are observed from 1 - 250 μs. In addition, preliminary degradation mechanisms and major products were elucidated using (60)Co γ-irradiation and LC-MS. The toxicity of products was evaluated using luminescent bacteria. These data are required for both evaluating the potential use of AO/RPs for the destruction of these compounds and for studies of their fate and transport in surface waters where radical chemistry may be important in assessing their lifetime.
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Affiliation(s)
- Hui Yu
- Chinese Research Academy of Environmental Sciences, Beijing, 100012, P R China
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Radical-induced destruction of diethyl phthalate in aqueous solution: kinetics, spectral properties, and degradation efficiencies studies. RESEARCH ON CHEMICAL INTERMEDIATES 2012. [DOI: 10.1007/s11164-012-0876-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Herrmann H, Hoffmann D, Schaefer T, Bräuer P, Tilgner A. Tropospheric aqueous-phase free-radical chemistry: radical sources, spectra, reaction kinetics and prediction tools. Chemphyschem 2011; 11:3796-822. [PMID: 21120981 DOI: 10.1002/cphc.201000533] [Citation(s) in RCA: 176] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The most important radicals which need to be considered for the description of chemical conversion processes in tropospheric aqueous systems are the hydroxyl radical (OH), the nitrate radical (NO(3)) and sulphur-containing radicals such as the sulphate radical (SO(4)(-)). For each of the three radicals their generation and their properties are discussed first in the corresponding sections. The main focus herein is to summarize newly published aqueous-phase kinetic data on OH, NO(3) and SO(4)(-) radical reactions relevant for the description of multiphase tropospheric chemistry. The data compilation builds up on earlier datasets published in the literature. Since the last review in 2003 (H. Herrmann, Chem. Rev. 2003, 103, 4691-4716) more than hundred new rate constants are available from literature. In case of larger discrepancies between novel and already published rate constants the available kinetic data for these reactions are discussed and recommendations are provided when possible. As many OH kinetic data are obtained by means of the thiocyanate (SCN(-)) system in competition kinetic measurements of OH radical reactions this system is reviewed in a subchapter of this review. Available rate constants for the reaction sequence following the reaction of OH+SCN(-) are summarized. Newly published data since 2003 have been considered and averaged rate constants are calculated. Applying competition kinetics measurements usually the formation of the radical anion (SCN)(2)(-) is monitored directly by absorption measurements. Within this subchapter available absorption spectra of the (SCN)(2)(-) radical anion from the last five decades are presented. Based on these spectra an averaged (SCN)(2)(-) spectrum was calculated. In the last years different estimation methods for aqueous phase kinetic data of radical reactions have been developed and published. Such methods are often essential to estimate kinetic data which are not accessible from the literature. Approaches for rate constant prediction include empirical correlations as well as structure activity relationships (SAR) either with or without the usage of quantum chemical descriptors. Recently published estimation methods for OH, NO(3) and SO(4)(-) radical reactions in aqueous solution are finally summarized, compared and discussed.
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Affiliation(s)
- Hartmut Herrmann
- Chemistry Department, Leibniz-Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig, Germany.
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13
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Reactivity of OH radicals with chlorobenzoic acids—A pulse radiolysis and steady-state radiolysis study. Radiat Phys Chem Oxf Engl 1993 2010. [DOI: 10.1016/j.radphyschem.2009.12.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Mitroka S, Zimmeck S, Troya D, Tanko JM. How Solvent Modulates Hydroxyl Radical Reactivity in Hydrogen Atom Abstractions. J Am Chem Soc 2010; 132:2907-13. [DOI: 10.1021/ja903856t] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Susan Mitroka
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - Stephanie Zimmeck
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - Diego Troya
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - James M. Tanko
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
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An T, Yang H, Song W, Li G, Luo H, Cooper WJ. Mechanistic Considerations for the Advanced Oxidation Treatment of Fluoroquinolone Pharmaceutical Compounds using TiO2 Heterogeneous Catalysis. J Phys Chem A 2010; 114:2569-75. [DOI: 10.1021/jp911349y] [Citation(s) in RCA: 143] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Taicheng An
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China, Graduate School of Chinese Academy of Sciences, Beijing 100049, China, and Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, California 92697-2175
| | - Hai Yang
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China, Graduate School of Chinese Academy of Sciences, Beijing 100049, China, and Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, California 92697-2175
| | - Weihua Song
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China, Graduate School of Chinese Academy of Sciences, Beijing 100049, China, and Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, California 92697-2175
| | - Guiying Li
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China, Graduate School of Chinese Academy of Sciences, Beijing 100049, China, and Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, California 92697-2175
| | - Haiying Luo
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China, Graduate School of Chinese Academy of Sciences, Beijing 100049, China, and Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, California 92697-2175
| | - William J. Cooper
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China, Graduate School of Chinese Academy of Sciences, Beijing 100049, China, and Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, California 92697-2175
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Jeong J, Song W, Cooper WJ, Jung J, Greaves J. Degradation of tetracycline antibiotics: Mechanisms and kinetic studies for advanced oxidation/reduction processes. CHEMOSPHERE 2010; 78:533-540. [PMID: 20022625 DOI: 10.1016/j.chemosphere.2009.11.024] [Citation(s) in RCA: 200] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Revised: 11/16/2009] [Accepted: 11/16/2009] [Indexed: 05/26/2023]
Abstract
This study involves elucidating the destruction mechanisms of four tetracyclines via reactions with ()OH and solvated electrons (e(aq)(-)). The first step is to evaluate the bimolecular rate constants for the reaction of ()OH and e(aq)(-). Transient absorption spectra for the intermediates formed by the reaction of ()OH were also measured over the time period of 1-250micros to assist in selecting the appropriate wavelength for the absolute bimolecular reaction rate constants. For these four compounds, tetracycline, chlortetracycline, oxytetracycline, and doxycycline, the absolute rate constants with ()OH were (6.3+/-0.1)x10(9), (5.2+/-0.2)x10(9), (5.6+/-0.1)x10(9), and (7.6+/-0.1)x10(9) M(-1) s(-1), and for e(aq)(-) were (2.2+/-0.1)x10(10), (1.3+/-0.2)x10(10), (2.3+/-0.1)x10(10), and (2.5+/-0.1)x10(10) M(-1) s(-1), respectively. The efficiencies for ()OH reaction with the four tetracyclines ranged from 32% to 60%. The efficiencies for e(aq)(-) reaction were 15-29% except for chlortetracycline which was significantly higher (97%) than the other tetracyclines in spite of the similar reaction rate constants for e(aq)(-) in all cases. To evaluate the use of advanced oxidation/reduction processes for the destruction of tetracyclines it is necessary to have reaction rates, reaction efficiencies and destruction mechanisms. This paper is the first step in eventually realizing the formulation of a detailed kinetic destruction model for these four tetracycline antibiotics.
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Affiliation(s)
- Joonseon Jeong
- Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, 92697-2175, United States
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Santoke H, Song W, Cooper WJ, Greaves J, Miller GE. Free-Radical-Induced Oxidative and Reductive Degradation of Fluoroquinolone Pharmaceuticals: Kinetic Studies and Degradation Mechanism. J Phys Chem A 2009; 113:7846-51. [DOI: 10.1021/jp9029453] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hanoz Santoke
- Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, Irvine, California 92697-2175, and Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025
| | - Weihua Song
- Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, Irvine, California 92697-2175, and Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025
| | - William J. Cooper
- Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, Irvine, California 92697-2175, and Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025
| | - John Greaves
- Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, Irvine, California 92697-2175, and Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025
| | - George E. Miller
- Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, Irvine, California 92697-2175, and Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025
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Song W, Xu T, Cooper WJ, Dionysiou DD, de la Cruz AA, O'Shea KE. Radiolysis studies on the destruction of microcystin-LR in aqueous solution by hydroxyl radicals. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2009; 43:1487-92. [PMID: 19350924 PMCID: PMC3523294 DOI: 10.1021/es802282n] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In this study, steady-state and time-resolved radiolysis methods were used to determine the primary reaction pathways and kinetic parameters for the reactions of hydroxyl radical with microcystin-LR (MC-LR). The fundamental kinetic data is critical for the accurate evaluation of hydroxyl-radical based technologies for the destruction of this problematic class of cyanotoxins. The bimolecular rate constant for the reaction of hydroxyl radical with MC-LR is 2.3 (+/-0.1) x 10(10) M(-1)s(-1) based on time-resolved competition kinetics with SCN-at low conversions using pulsed radiolysis experiments. The reaction of hydroxyl radical with MC-LR can occur via a number of competing reaction pathways, including addition to the benzene ring and diene and abstraction of aliphatic hydrogen atoms. LC-MS analyses indicate the major products from the reaction of hydroxyl radicals with MC-LR involve addition of hydroxyl radical to the benzene ring and diene moieties of the Adda side chain. Transient absorption spectroscopy monitored between 260-500 nm, following pulsed hydroxyl radical generation, indicate the formation of a transient species with absorption maxima at 270 and 310 nm. The absorption maxima and lifetime of the transient species are characteristic of hydroxycyclohexadienyl radicals resulting from the addition of hydroxyl radical to the benzene ring. The rate constant for the formation of hydroxycyclohexadienyl radical is 1.0 (+/-0.1) x 10(10) M(-1)s(-1) accounting for approximately 40% of the primary reaction pathways. Representative rate constants and partitioning of hydroxyl radical reactions were assessed based on the reactivities of surrogate substrates and individual amino acids. Summation of the individual reactivities of hydroxyl radical at the different reactive sites (amino acids) leads to a rate constant of 2.1 x 10(10) M(-1) s(-1) in good agreementwith the rate constant determined in our studies. The relative magnitude of the rate constants for the reactions of hydroxyl radical with the individual amino acids and appropriate surrogates, suggest 60-70% reactions of hydroxyl radical occur at the benzene and diene functional groups of the Adda moiety.
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Affiliation(s)
- Weihua Song
- Department of Chemistry and Biochemistry, Florida International University, University Park, Miami, FL 33199
- Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, CA, 92697-2175
| | - Tielian Xu
- Department of Chemistry and Biochemistry, Florida International University, University Park, Miami, FL 33199
| | - William J. Cooper
- Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, CA, 92697-2175
| | - Dionysios D. Dionysiou
- Civil and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221-0071
| | - Armah A. de la Cruz
- Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, Ohio, 45268
| | - Kevin E. O'Shea
- Department of Chemistry and Biochemistry, Florida International University, University Park, Miami, FL 33199
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Song W, Chen W, Cooper WJ, Greaves J, Miller GE. Free-radical destruction of beta-lactam antibiotics in aqueous solution. J Phys Chem A 2008; 112:7411-7. [PMID: 18637660 DOI: 10.1021/jp803229a] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Many pharmaceutical compounds and metabolites are being found in surface and ground waters, indicating their ineffective removal by conventional wastewater treatment technologies. Advanced oxidation/reduction processes (AO/RPs), which utilize free-radical reactions to directly degrade chemical contaminants, are alternatives to traditional water treatment. This study reports the absolute rate constants for reaction of three beta-lactam antibiotics (penicillin G, penicillin V, amoxicillin) and a model compound (+)-6-aminopenicillanic acid with the two major AO/RP reactive species: hydroxyl radical ((*)OH) and hydrated electron (e(-)aq). The bimolecular reaction rate constants (M(-1) s(-1)) for penicillin G, penicillin V, amoxicillin, and (+)-6-aminopenicillanic acid for (*)OH were (7.97 +/- 0.11) x 10(9), (8.76 +/- 0.28) x 10(9), (6.94 +/- 0.44) x 10(9), and (2.40 +/- 0.05) x 10(9) and for e(-)aq were (3.92 +/- 0.10) x 10(9), (5.76 +/- 0.24) x 10(9), (3.47 +/- 0.07) x 10(9), and (3.35 +/- 0.06) x 10(9), respectively. To provide a better understanding of the decomposition of the intermediate radicals produced by hydroxyl radical reactions, transient absorption spectra were observed from 1 to 100 micros. In addition, preliminary degradation mechanisms and major products were elucidated using (137)Cs gamma irradiation and LC-MS. These data are required for both evaluating the potential use of AO/RPs for the destruction of these compounds and studies of their fate and transport in surface waters where radical chemistry may be important in assessing their lifetime.
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Affiliation(s)
- Weihua Song
- Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine, Irvine, California 92697-2175, USA.
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Yadav P, Mohan H, Maity DK, Suresh CH, Rao BM. Oxidation of cinnamic acid derivatives: A pulse radiolysis and theoretical study. Chem Phys 2008. [DOI: 10.1016/j.chemphys.2008.03.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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21
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Song W, Cooper WJ, Mezyk SP, Greaves J, Peake BM. Free radical destruction of beta-blockers in aqueous solution. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2008; 42:1256-61. [PMID: 18351102 DOI: 10.1021/es702245n] [Citation(s) in RCA: 122] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Many pharmaceutical compounds and metabolites are currently found in surface and ground waters which indicates their ineffective removal by conventional water treatment technologies. Advanced oxidation/reduction processes (AO/ RPs) are alternatives to traditional water treatment, which utilize free radical reactions to directly degrade chemical contaminants. This study reports the absolute rate constants for reaction of three beta-blockers (atenolol, metoprolol, and propranolol) with the two major AO/RP radicals; the hydroxyl radical (*OH) and hydrated electron ((e-)aq). The bimolecular reaction rate constants for *OH are (7.05 +/- 0.27) x 10(9), (8.39 +/- 0.06) x 10(9), and (1.07 +/- 0.02) x 10(10), and for (e-)aq they are (5.91 +/- 0.21) x 10(8), (1.73 +/- 0.03) x 10(8), and (1.26 +/- 0.02) x 10(10), respectively. Transient spectra were observed for the intermediate radicals produced by hydroxyl radical reactions. In addition, preliminary degradation mechanisms and major products were elucidated using 60Co gamma-irradiation and LC-MS. These data are required for both evaluating the potential use of AO/RPs for the destruction of these compounds and for studies of their fate and transport in surface waters where radical chemistry may be important in assessing their lifetime.
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Affiliation(s)
- Weihua Song
- Urban Water Research Center, Department of Civil and Environmental Engineering, University of California, Irvine 92697-2175, USA.
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22
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ZHANG RX, YE ZL, SHEN Y, DONG WB, HOU HQ. Photoinduced Oxidation Reaction of Benzotrifluoride with OH Radical by the Laser Flash Method. CHINESE J CHEM 2008. [DOI: 10.1002/cjoc.200890023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Manoj P, Prasanthkumar KP, Manoj VM, Aravind UK, Manojkumar TK, Aravindakumar CT. Oxidation of substituted triazines by sulfate radical anion (SO4•−) in aqueous medium: a laser flash photolysis and steady state radiolysis study. J PHYS ORG CHEM 2007. [DOI: 10.1002/poc.1134] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nicolaescu AR, Wiest O, Kamat PV. Radical-Induced Oxidative Transformation of Quinoline. J Phys Chem A 2003. [DOI: 10.1021/jp027112s] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Singh TS, Madhava Rao B, Mohan H, Mittal JP. A pulse radiolysis study of coumarin and its derivatives. J Photochem Photobiol A Chem 2002. [DOI: 10.1016/s1010-6030(02)00272-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Sharma KK, Rao BSM, Mohan H, Mittal JP, Oakes J, O'Neill P. Free-Radical-Induced Oxidation and Reduction of 1-Arylazo-2-naphthol Dyes: A Radiation Chemical Study. J Phys Chem A 2002. [DOI: 10.1021/jp014025b] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. K. Sharma
- National Centre for Free Radical Research, Deparment of Chemistry, University of Pune, Pune − 411 007, India, Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai − 400 085, India, Unilever Research, Port Sunlight, Quarry Road East, Bebington, Wirral, Merseyside CH63 3JW, U.K., and Radiation and Genome Stability Unit, MRC, Harwell, Didcot, Oxon, Oxfordshire OX11 ORD, U.K
| | - B. S. M. Rao
- National Centre for Free Radical Research, Deparment of Chemistry, University of Pune, Pune − 411 007, India, Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai − 400 085, India, Unilever Research, Port Sunlight, Quarry Road East, Bebington, Wirral, Merseyside CH63 3JW, U.K., and Radiation and Genome Stability Unit, MRC, Harwell, Didcot, Oxon, Oxfordshire OX11 ORD, U.K
| | - H. Mohan
- National Centre for Free Radical Research, Deparment of Chemistry, University of Pune, Pune − 411 007, India, Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai − 400 085, India, Unilever Research, Port Sunlight, Quarry Road East, Bebington, Wirral, Merseyside CH63 3JW, U.K., and Radiation and Genome Stability Unit, MRC, Harwell, Didcot, Oxon, Oxfordshire OX11 ORD, U.K
| | - J. P. Mittal
- National Centre for Free Radical Research, Deparment of Chemistry, University of Pune, Pune − 411 007, India, Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai − 400 085, India, Unilever Research, Port Sunlight, Quarry Road East, Bebington, Wirral, Merseyside CH63 3JW, U.K., and Radiation and Genome Stability Unit, MRC, Harwell, Didcot, Oxon, Oxfordshire OX11 ORD, U.K
| | - J. Oakes
- National Centre for Free Radical Research, Deparment of Chemistry, University of Pune, Pune − 411 007, India, Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai − 400 085, India, Unilever Research, Port Sunlight, Quarry Road East, Bebington, Wirral, Merseyside CH63 3JW, U.K., and Radiation and Genome Stability Unit, MRC, Harwell, Didcot, Oxon, Oxfordshire OX11 ORD, U.K
| | - P. O'Neill
- National Centre for Free Radical Research, Deparment of Chemistry, University of Pune, Pune − 411 007, India, Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai − 400 085, India, Unilever Research, Port Sunlight, Quarry Road East, Bebington, Wirral, Merseyside CH63 3JW, U.K., and Radiation and Genome Stability Unit, MRC, Harwell, Didcot, Oxon, Oxfordshire OX11 ORD, U.K
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27
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Manoj P, Varghese R, Manoj VM, Aravindakumar CT. Reaction of Sulphate Radical Anion (SO4•-) with Cyanuric Acid: A Potential Reaction for Its Degradation? CHEM LETT 2002. [DOI: 10.1246/cl.2002.74] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Alam M, Rao B, Mohan H, Mittal J. Study of radiation chemical reactions of oxidising and reducing radicals with furazan derivatives. J Photochem Photobiol A Chem 2001. [DOI: 10.1016/s1010-6030(01)00529-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Geeta S, Sharma S, Rao B, Mohan H, Dhanya S, Mittal J. Study of kinetics and absorption spectra of OH adducts of hydroxy derivatives of benzaldehyde and acetophenone. J Photochem Photobiol A Chem 2001. [DOI: 10.1016/s1010-6030(01)00402-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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30
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Alegre ML, Geronés M, Rosso JA, Bertolotti SG, Braun AM, Mártire DO, Gonzalez MC. Kinetic Study of the Reactions of Chlorine Atoms and Cl2•- Radical Anions in Aqueous Solutions. 1. Reaction with Benzene. J Phys Chem A 2000. [DOI: 10.1021/jp9929768] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- María L. Alegre
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, (1900) La Plata, Argentina
| | - Mariana Geronés
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, (1900) La Plata, Argentina
| | - Janina A. Rosso
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, (1900) La Plata, Argentina
| | - Sonia G. Bertolotti
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, (1900) La Plata, Argentina
| | - André M. Braun
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, (1900) La Plata, Argentina
| | - Daniel O. Mártire
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, (1900) La Plata, Argentina
| | - Mónica C. Gonzalez
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, (1900) La Plata, Argentina
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31
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Wang XB, Nicholas JB, Wang LS. Photoelectron Spectroscopy and Theoretical Calculations of SO4- and HSO4-: Confirmation of High Electron Affinities of SO4 and HSO4. J Phys Chem A 1999. [DOI: 10.1021/jp992726r] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xue-Bin Wang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99352, and W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, MS K8-88, P.O. Box 999, Richland, Washington 99352
| | - John B. Nicholas
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99352, and W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, MS K8-88, P.O. Box 999, Richland, Washington 99352
| | - Lai-Sheng Wang
- Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99352, and W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, MS K8-88, P.O. Box 999, Richland, Washington 99352
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32
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Mohan H, Mittal JP. Pulse Radiolysis Investigations on Acidic Aqueous Solutions of Benzene: Formation of Radical Cations. J Phys Chem A 1998. [DOI: 10.1021/jp983255w] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hari Mohan
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - Jai P. Mittal
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
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Glowa GA, Mezyk SP. The radiation chemistry of iodophenolsThe research described herein was supported in part by the Office of Basic Energy Sciences of the Department of Energy. This is contribution No. NDRL 4019 from the Notre Dame Radiation Laboratory. Radiat Phys Chem Oxf Engl 1993 1998. [DOI: 10.1016/s0969-806x(98)00011-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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34
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Rosso JA, Rodríguez Nieto FJ, Gonzalez MC, Mártire DO. Reactions of phosphate radicals with substituted benzenes. J Photochem Photobiol A Chem 1998. [DOI: 10.1016/s1010-6030(98)00266-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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35
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Choure SC, Bamatraf MMM, Rao BSM, Das R, Mohan H, Mittal JP. Hydroxylation of Chlorotoluenes and Cresols: A Pulse Radiolysis, Laser Flash Photolysis, and Product Analysis Study. J Phys Chem A 1997. [DOI: 10.1021/jp971986a] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Ranjan Das
- Chemical Physics Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India
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36
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Sharma SB, Mudaliar M, Rao BSM, Mohan H, Mittal JP. Radiation Chemical Oxidation of Benzaldehyde, Acetophenone, and Benzophenone. J Phys Chem A 1997. [DOI: 10.1021/jp9718717] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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Mohan H. Pulse radiolysis studies on .OH radical induced reactions with substituted iodobenzenes in aqueous solutions. Radiat Phys Chem Oxf Engl 1993 1997. [DOI: 10.1016/s0969-806x(96)00098-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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38
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Hydroxyl radical induced reactions with 1-bromo-2-fluorobenzene in aqueous solutions: formation of radical cations. Chem Phys Lett 1996. [DOI: 10.1016/s0009-2614(96)01168-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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39
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McKee ML. Computational Study of the Mono- and Dianions of SO2, SO3, SO4, S2O3, S2O4, S2O6, and S2O8. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp952361k] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael L. McKee
- Department of Chemistry, Auburn University, Auburn, Alabama 36849
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40
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Mohan H, Mittal JP. Formation of radical cations of chlorobenzene in aqueous solutions. A pulse radiolysis study. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)00186-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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