1
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Wang WL, Jing ZB, Zhang YL, Wu QY, Drewes JE, Lee MY, Hübner U. Assessing the Chemical-Free Oxidation of Trace Organic Chemicals by VUV/UV as an Alternative to Conventional UV/H 2O 2. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:7113-7123. [PMID: 38547102 DOI: 10.1021/acs.est.3c08414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/24/2024]
Abstract
Low-pressure mercury lamps with high-purity quartz can emit both vacuum-UV (VUV, 185 nm) and UV (254 nm) and are commercially available and promising for eliminating recalcitrant organic pollutants. The feasibility of VUV/UV as a chemical-free oxidation process was verified and quantitatively assessed by the concept of H2O2 equivalence (EQH2O2), at which UV/H2O2 showed the same performance as VUV/UV for the degradation of trace organic contaminants (TOrCs). Although VUV showed superior H2O activation and oxidation performance, its performance highly varied as a function of light path length (Lp) in water, while that of UV/H2O2 proportionally decreased with decreasing H2O2 dose regardless of Lp. On increasing Lp from 1.0 to 3.0 cm, the EQH2O2 of VUV/UV decreased from 0.81 to 0.22 mM H2O2. Chloride and nitrate hardly influenced UV/H2O2, but they dramatically inhibited VUV/UV. The competitive absorbance of VUV by chloride and nitrate was verified as the main reason. The inhibitory effect was partially compensated by •OH formation from the propagation reactions of chloride or nitrate VUV photolysis, which was verified by kinetic modeling in Kintecus. In water with an Lp of 2.0 cm, the EQH2O2 of VUV/UV decreased from 0.43 to 0.17 mM (60.8% decrease) on increasing the chloride concentration from 0 to 15 mM and to 0.20 mM (53.5% decrease) at 4 mM nitrate. The results of this study provide a comprehensive understanding of VUV/UV oxidation in comparison to UV/H2O2, which underscores the suitability and efficiency of chemical-free oxidation with VUV/UV.
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Affiliation(s)
- Wen-Long Wang
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Zi-Bo Jing
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Yi-Lin Zhang
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Qian-Yuan Wu
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Jörg E Drewes
- Chair of Urban Water Systems Engineering, Technical University of Munich, Am Coulombwall 3, Garching 85748, Germany
| | - Min-Yong Lee
- Division of Chemical Research, National Institute of Environmental Research, Seogu, Incheon 22689, Republic of Korea
| | - Uwe Hübner
- Chair of Urban Water Systems Engineering, Technical University of Munich, Am Coulombwall 3, Garching 85748, Germany
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2
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Jin S, Kong L, Yang K, Wang C, Xia L, Wang Y, Tan J, Wang L. Combined effects of high relative humidity and ultraviolet irradiation: Enhancing the production of gaseous NO 2 from the photolysis of NH 4NO 3. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156480. [PMID: 35675886 DOI: 10.1016/j.scitotenv.2022.156480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 05/27/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
Free radicals and nitrogen-containing species produced by nitrate photolysis can affect various atmospheric chemical processes, and thereby the photochemical behavior of atmospheric nitrate aerosols has been attracting much attention. However, the photolysis mechanism of NH4NO3 and its products under different atmospheric conditions remain unclear. In this study, the effects of relative humidity (RH), pH, NH3, ultraviolet (UV) light intensity and halogen ions (Cl-, Br- and I-) on the photolysis of particulate NH4NO3 have been investigated through a flow tube reactor. The results show that RH can significantly enhance the production of gaseous NO2 from the photolysis of NH4NO3 when RH is higher than its deliquescence RH, but almost no NO2 is generated under dry conditions. Under high RH and UV light, the main product of NH4NO3 photolysis is NO2, rather than NO and HONO, and another main species HNO3 which mainly comes from the hydrolysis of product NO2 in the gas path was detected. Almost no NO2 and HNO3 are produced under high RH without UV light or low RH with UV light, showing the combined effect of high RH and UV irradiation on the photolysis of NH4NO3. In addition, under high RH, the lower the pH and the stronger the light intensity, the higher the NO2 production. Furthermore, surprising yields of NO and HONO are detected in the presence of halogen ions, especially in the presence of I-, indicating the important role of halogen ion in the nitrate photolysis. These results provide new insights into the photolysis of atmospheric nitrate aerosols, and may contribute to elucidating the formation and migration of atmospheric nitrate aerosols and the potential mechanisms of the occurrence and evolution of atmospheric pollution and ozone pollution.
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Affiliation(s)
- Shengyan Jin
- Department of Environmental Science & Engineering, Jiangwan Campus, Fudan University, No. 2205 Songhu Road, Shanghai 200438, China
| | - Lingdong Kong
- Department of Environmental Science & Engineering, Jiangwan Campus, Fudan University, No. 2205 Songhu Road, Shanghai 200438, China; Shanghai Institute of Eco-Chongming (SIEC), No.3663 Northern Zhongshan Road, Shanghai 200062, China.
| | - Kejing Yang
- Department of Environmental Science & Engineering, Jiangwan Campus, Fudan University, No. 2205 Songhu Road, Shanghai 200438, China
| | - Chao Wang
- Department of Environmental Science & Engineering, Jiangwan Campus, Fudan University, No. 2205 Songhu Road, Shanghai 200438, China
| | - Lianghai Xia
- Department of Environmental Science & Engineering, Jiangwan Campus, Fudan University, No. 2205 Songhu Road, Shanghai 200438, China
| | - Yuwen Wang
- Department of Environmental Science & Engineering, Jiangwan Campus, Fudan University, No. 2205 Songhu Road, Shanghai 200438, China
| | - Jie Tan
- Department of Environmental Science & Engineering, Jiangwan Campus, Fudan University, No. 2205 Songhu Road, Shanghai 200438, China
| | - Lin Wang
- Department of Environmental Science & Engineering, Jiangwan Campus, Fudan University, No. 2205 Songhu Road, Shanghai 200438, China
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3
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Sharma VK, Manoli K, Ma X. Reactivity of nitrogen species with inorganic and organic compounds in water. CHEMOSPHERE 2022; 302:134911. [PMID: 35561761 DOI: 10.1016/j.chemosphere.2022.134911] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 05/03/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
Many studies on the reactive nitrogen species (RNS, ●NO2, ●NO and ●NH2) with pollutants in water have been performed to understand the abatement of inorganic and organic compounds by these species, and the mechanisms of the formation of oxidative transformation products, especially nitrogenous oxidized byproducts. In this review, approaches to generate RNS in aqueous solution is first presented, followed by a summary of their reactivity with a wide range of compounds. The second-order rate constants (k, M-1 s-1) for the reactivity of ●NO2 and ●NO with a wide range of inorganic radical and nonradical species were correlated with thermodynamic one-electron oxidation potentials (E0). The positive correlation between log(k) versus E0 suggests one-electron transfer reactions. The Hammett-type correlations were developed for the reactions of ●NO2 and ●NH2 with organic compounds, using the unsubstituted benzene as a reference molecule (i.e., Σσo,p,m = 0) to calculate Σσo,p,m = σo + σp + σm for each organic molecule. Linear negative correlations of log(k) with Σσo,p,m were obtained for both ●NO2 and ●NH2, suggesting electrophilic substitution mechanism. The correlations presented herein may assist in eliminating organic micropollutants in water treatment and reuse processes.
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Affiliation(s)
- Virender K Sharma
- Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX, 77843, USA.
| | - Kyriakos Manoli
- Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX, 77843, USA
| | - Xingmao Ma
- Zachery Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX, 77843, USA
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4
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Kim J, Choe YJ, Kim SH, Choi IS, Jeong K. Deciphering Evolution Pathway of Supported NO 3 • Enabled via Radical Transfer from •OH to Surface NO 3 - Functionality for Oxidative Degradation of Aqueous Contaminants. JACS AU 2021; 1:1158-1177. [PMID: 34467355 PMCID: PMC8397361 DOI: 10.1021/jacsau.1c00124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Indexed: 06/13/2023]
Abstract
NO3 • can compete with omnipotent •OH/SO4 •- in decomposing aqueous pollutants because of its lengthy lifespan and significant tolerance to background scavengers present in H2O matrices, albeit with moderate oxidizing power. The generation of NO3 •, however, is of grand demand due to the need of NO2 •/O3, radioactive element, or NaNO3/HNO3 in the presence of highly energized electron/light. This study has pioneered a singular pathway used to radicalize surface NO3 - functionalities anchored on polymorphic α-/γ-MnO2 surfaces (α-/γ-MnO2-N), in which Lewis acidic Mn2+/3+ and NO3 - served to form •OH via H2O2 dissection and NO3 • via radical transfer from •OH to NO3 - (•OH → NO3 •), respectively. The elementary steps proposed for the •OH → NO3 • route could be energetically favorable and marginal except for two stages such as endothermic •OH desorption and exothermic •OH-mediated NO3 - radicalization, as verified by EPR spectroscopy experiments and DFT calculations. The Lewis acidic strength of the Mn2+/3+ species innate to α-MnO2-N was the smallest among those inherent to α-/β-/γ-MnO2 and α-/γ-MnO2-N. Hence, α-MnO2-N prompted the rate-determining stage of the •OH → NO3 • route (•OH desorption) in the most efficient manner, as also evidenced by the analysis on the energy barrier required to proceed with the •OH → NO3 • route. Meanwhile, XANES and in situ DRIFT spectroscopy experiments corroborated that α-MnO2-N provided a larger concentration of surface NO3 - species with bi-dentate binding arrays than γ-MnO2-N. Hence, α-MnO2-N could outperform γ-MnO2-N in improving the collision frequency between •OH and NO3 - species and in facilitating the exothermic transition of NO3 - functionalities to surface NO3 • analogues per unit time. These were corroborated by a greater efficiency of α-MnO2-N in decomposing phenol, in addition to scavenging/filtration control runs and DFT calculations. Importantly, supported NO3 • species provided 5-7-fold greater efficiency in degrading textile wastewater than conventional •OH and supported SO4 •- analogues we discovered previously.
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Affiliation(s)
- Jongsik Kim
- Extreme
Materials Research Center, Korea Institute
of Science and Technology, Seoul 02792, South
Korea
| | - Yun Jeong Choe
- Extreme
Materials Research Center, Korea Institute
of Science and Technology, Seoul 02792, South
Korea
- Department
of Materials Science and Engineering, Seoul
National University, Seoul 08826, South Korea
| | - Sang Hoon Kim
- Extreme
Materials Research Center, Korea Institute
of Science and Technology, Seoul 02792, South
Korea
- Division
of Nano and Information Technology, Korea Institute of Science and
Technology School, University of Science
and Technology, Daejeon 34113, South Korea
| | - In-Suk Choi
- Department
of Materials Science and Engineering, Seoul
National University, Seoul 08826, South Korea
| | - Keunhong Jeong
- Department
of Chemistry, Korea Military Academy, Seoul 01805, South Korea
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5
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Rabani J, Mamane H, Pousty D, Bolton JR. Practical Chemical Actinometry-A Review. Photochem Photobiol 2021; 97:873-902. [PMID: 34124787 DOI: 10.1111/php.13429] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 04/05/2021] [Indexed: 01/03/2023]
Abstract
Actinometers are physical or chemical systems that can be employed to determine photon fluxes. Chemical actinometers are photochemical systems with known quantum yields that can be employed to determine accurate photon fluxes for specific photochemical reactions. This review explores in detail several practical chemical actinometers (ferrioxalate, iodide-iodate, uranyl oxalate, nitrate, uridine, hydrogen peroxide and several actinometers for the vacuum ultraviolet). Each actinometer is described with recommended conditions for its use.
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Affiliation(s)
- Joseph Rabani
- The Accelerator Laboratory, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Hadas Mamane
- School of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv, Israel
| | - Dana Pousty
- School of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv, Israel
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6
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Du Y, Wang H, Zhang T, Wei W, Guo M. ICT-based fluorescent ratiometric probe for monitoring mitochondrial peroxynitrite in living cells. NEW J CHEM 2021. [DOI: 10.1039/d1nj01713f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Mitochondria-targeted near-infrared fluorescent probe for the detection of peroxynitrite and the bioimaging of peroxynitrite in cells.
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Affiliation(s)
- Yuting Du
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou
- China
| | - Hongliang Wang
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou
- China
| | - Ting Zhang
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou
- China
| | - Wen Wei
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou
- China
| | - Minmin Guo
- Department of Chemistry
- Xinzhou Teachers University
- Xinzhou
- China
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7
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Horne GP, Zarzana CA, Daubaras DL, Pilgrim CD, Rae C, Faulkner RF, Kiddle JJ, Mezyk SP. Probing activated radioprotection of simple hydrophilic phosphonic acids in aqueous solution. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2019.108636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Han M, Mohseni M. Impact of organic and inorganic carbon on the formation of nitrite during the VUV photolysis of nitrate containing water. WATER RESEARCH 2020; 168:115169. [PMID: 31629231 DOI: 10.1016/j.watres.2019.115169] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 10/04/2019] [Accepted: 10/09/2019] [Indexed: 06/10/2023]
Abstract
Nitrite formation during Vacuum UV (VUV) photolysis of nitrate-containing water has been studied in this research. Here the goal was to understand the effect of water matrix, specifically dissolved organic carbon (DOC), dissolved inorganic carbon (DIC) and dissolved oxygen (DO), on the formation of nitrite in nitrate-containing water during treatment with VUV AOP. The results confirmed that the formation of nitrite was considerable during the VUV irradiation, and it increased with increasing the UV fluence. However, the rate of nitrite formation was not linearly correlated with the UV fluence. Also, nitrite formation increased with increasing the DOC in water. Tert-butanol, as OH radical scavenger, was used to elucidate the mechanism behind the impact of DOC. The effect of DIC was only pronounced at very high DIC concentration, which led to lower formation of nitrite. When both DOC and DIC were present in water, DOC had the dominant effect on nitrite formation. DO in water had the impact of reducing the formation of nitrite. All these results can help to understand the mechanisms involved in the transformation of nitrate to nitrite in various water matrices, and guide VUV applications for scientific and industrial proposes.
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Affiliation(s)
- Mengqi Han
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Madjid Mohseni
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada.
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9
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Tarabová B, Lukeš P, Hammer MU, Jablonowski H, von Woedtke T, Reuter S, Machala Z. Fluorescence measurements of peroxynitrite/peroxynitrous acid in cold air plasma treated aqueous solutions. Phys Chem Chem Phys 2019; 21:8883-8896. [PMID: 30982833 DOI: 10.1039/c9cp00871c] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Qualitative detection of peroxynitrite/peroxynitrous acid (ONOO-/ONOOH) as one of the key bactericidal agents produced in cold air plasma activated aqueous solutions is presented. We examined the use of the 2,7-dichlorodihydrofluorescein diacetate (H2DCFDA) fluorescent dye to detect ONOO-/ONOOH in plasma activated non-buffered water (PAW) or buffered solution (PAPB) generated by DC-driven self-pulsed transient spark discharge at atmospheric pressure in ambient air. The diagnostic selectivity of H2DCFDA to reactive oxygen and nitrogen species (RONS) typical of plasma activated aqueous solutions was examined by using various scavengers of RONS. This cross-reactivity study showed the highest sensitivity of the H2DCFDA dye to ONOO-/ONOOH. However, besides ONOO-/ONOOH, H2DCFDA also exhibited sensitivity to hypochlorite anions/hypochlorous acid (OCl-/HOCl), showing that for a selective study it is important to have an idea about the possible constituents in the studied solutions. The sensitivity of H2DCFDA to other RONS even in much higher concentrations was negligible. The presence of nitrites (NO2-) and hydrogen peroxide (H2O2) in PAW led predominantly to the production of peroxynitrous acid with a strong fluorescence response of H2DCFDA in PAW. Plasma treatment of buffered solutions led to the weak response of H2DCFDA. The fluorescence induced in PAW decreased after scavenging individual reactants, namely NO2- and H2O2, as well as by scavenging the product of the peroxynitrite forming reaction, proving that the fluorescence response of H2DCFDA is primarily due to the formation of ONOO-/ONOOH. A chemical kinetics analysis of post-discharge processes and the pseudo-second order reaction between H2O2 and NO2- confirms formation of peroxynitrous acid in PAW with a rate in the order of tens of nM per second. The post-discharge evolution of the ONOOH formation rate was clearly correlated with the parallel detection of ONOO-/ONOOH by fluorescence spectroscopy using the H2DCFDA dye.
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Affiliation(s)
- Barbora Tarabová
- Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynská dolina, 84248 Bratislava, Slovakia.
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10
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Sun P, Meng T, Wang Z, Zhang R, Yao H, Yang Y, Zhao L. Degradation of Organic Micropollutants in UV/NH 2Cl Advanced Oxidation Process. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:9024-9033. [PMID: 31282670 DOI: 10.1021/acs.est.9b00749] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Monochloramine (NH2Cl) can be irradiated by UV to create an advanced oxidation condition (i.e., UV/NH2Cl) for the elimination of organic micropollutants (OMPs) from source water. However, information in retrospective studies was scarce on how UV/NH2Cl performance would be affected by the water matrix and OMP molecular structures. In this study, the degradation of five representative OMPs, including triclosan, carbamazepine, sulfamethoxazole, estradiol (E2), and ethinylestradiol (EE2), was examined in different water matrices. All OMPs were rapidly removed by UV/NH2Cl but exhibited different degradation mechanisms. Although •OH, •Cl, and direct photolysis mainly contributed to the overall degradation of OMPs in buffered nanopure water, the contribution of reactive nitrogen species (RNS) generated from the photolysis of NH2Cl was not negligible in the degradation of E2 and EE2. A phenolic group was identified as the moiety reactive toward RNS. Based on quantitative analysis of the impact on OMP degradation from cosolutes (including Cl-, HCO3-, NOM) as well as pH and NH2Cl doses, we developed a kinetic model for the prediction of OMP degradation in complex water matrices. In environmental water matrices, the performance and radical contributions in UV/NH2Cl and UV/H2O2 systems were taken into comparison, which showed faster degradation of OMPs and a more significant contribution of CO3•- in the UV/NH2Cl process.
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Affiliation(s)
- Peizhe Sun
- School of Environmental Science and Engineering , Tianjin University , Tianjin 300072 , China
| | - Tan Meng
- School of Environmental Science and Engineering , Tianjin University , Tianjin 300072 , China
| | - Zijian Wang
- School of Environmental Science and Engineering , Tianjin University , Tianjin 300072 , China
| | - Ruochun Zhang
- Institute of Surface-Earth System Science , Tianjin University , Tianjin 300072 , China
| | - Hong Yao
- School of Civil Engineering , Beijing Jiaotong University , Beijing 100044 , China
| | - Yongkui Yang
- School of Environmental Science and Engineering , Tianjin University , Tianjin 300072 , China
| | - Lin Zhao
- School of Environmental Science and Engineering , Tianjin University , Tianjin 300072 , China
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11
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Chen G, Hanukovich S, Chebeir M, Christopher P, Liu H. Nitrate Removal via a Formate Radical-Induced Photochemical Process. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:316-324. [PMID: 30500164 DOI: 10.1021/acs.est.8b04683] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Removal of excess nitrate is critical to balance the nitrogen cycle in aquatic systems. This study investigated a novel denitrification process by tailoring photochemistry of nitrate with formate. Under UV light irradiation, short-lived radicals (i.e., HO•, NO2•, and CO3•-) generated from nitrate photolysis partially oxidized formate to highly reductive formate radical (CO2•-). CO2•- further reduced nitrogen intermediates generated during photochemical denitrification (mainly NO•, HNO, and N2O) to gas-phase nitrogen (i.e., N2O and N2). The degradation kinetics of total dissolved nitrogen was mainly controlled by the photolysis rates of nitrate and nitrite. The distribution of final products was controlled by the reaction between CO2•- and N2O. To achieve a simultaneous and complete removal of dissolved nitrogen (i.e., nitrate, nitrite, and ammonia) and organic carbon, the formate-to-nitrate stoichiometry was determined as 3.1 ± 0.2 at neutral pH in deionized water. Solution pH impacted the removal rates of nitrate and nitrite but not that of total dissolved nitrogen or formate. The presence of dissolved organic matter at levels similar to those in groundwater had a negligible impact on the photochemical denitrification process. A high denitrification efficiency was also achieved in a synthetic groundwater matrix. Outcome from this study provides a potential denitrification technology for decentralized water treatment and reuse facilities to abate nitrate in local water resources.
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Affiliation(s)
- Gongde Chen
- Department of Chemical and Environmental Engineering , University of California at Riverside , Riverside , California 92521 , United States
| | - Sergei Hanukovich
- Department of Chemical and Environmental Engineering , University of California at Riverside , Riverside , California 92521 , United States
| | - Michelle Chebeir
- Department of Chemical and Environmental Engineering , University of California at Riverside , Riverside , California 92521 , United States
| | - Phillip Christopher
- Department of Chemical and Environmental Engineering , University of California at Riverside , Riverside , California 92521 , United States
| | - Haizhou Liu
- Department of Chemical and Environmental Engineering , University of California at Riverside , Riverside , California 92521 , United States
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12
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Horne GP, Kiddle JJ, Zarzana CA, Rae C, Peller JR, Cook AR, Mezyk SP, Mincher BJ. 31P NMR study of the activated radioprotection mechanism of octylphenyl-N,N-diisobutylcarbamoylmethyl phosphine oxide (CMPO) and analogues. Dalton Trans 2019; 48:11547-11555. [DOI: 10.1039/c9dt01950b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complexation of nitric acid by ligands containing conjugated aromatic phosphine oxide functionalities affords activated radioprotection through quenching n-dodecane excited states originating from gamma radiolysis.
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Affiliation(s)
- Gregory P. Horne
- Idaho National Laboratory
- Center for Radiation Chemistry Research
- Idaho Falls
- 83415, USA
| | - James J. Kiddle
- Western Michigan University
- Department of Chemistry
- Kalamazoo
- USA
| | | | - Cathy Rae
- Idaho National Laboratory
- Center for Radiation Chemistry Research
- Idaho Falls
- 83415, USA
| | | | - Andrew R. Cook
- Brookhaven National Laboratory
- Department of Chemistry
- Upton
- USA
| | - Stephen P. Mezyk
- California State University Long Beach
- Department of Chemistry and Biochemistry
- Long Beach
- USA
| | - Bruce J. Mincher
- Idaho National Laboratory
- Center for Radiation Chemistry Research
- Idaho Falls
- 83415, USA
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13
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Huang Y, Kong M, Westerman D, Xu EG, Coffin S, Cochran KH, Liu Y, Richardson SD, Schlenk D, Dionysiou DD. Effects of HCO 3- on Degradation of Toxic Contaminants of Emerging Concern by UV/NO 3. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:12697-12707. [PMID: 30284820 DOI: 10.1021/acs.est.8b04383] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This study investigated the significant influence of HCO3- on the degradation of contaminants of emerging concern (CECs) during nitrate photolysis at 254 nm for water reuse applications. The second-order rate constants for the reactions between selected contaminants with carbonate radical (CO3•-) were determined at pH 8.8 and T = 20 °C: estrone ((5.3 ± 1.1) × 108 M-1 s-1), bisphenol A ((2.8 ± 0.2) × 108 M-1 s-1), 17α-ethynylestradiol ((1.6 ± 0.3) × 108 M-1 s-1), triclosan ((4.2 ± 1.4) × 107 M-1 s-1), diclofenac ((2.7 ± 0.7) × 107 M-1 s-1), atrazine ((5.7 ± 0.1) × 106 M-1 s-1), carbamazepine ((4.2 ± 0.01) × 106 M-1 s-1), and ibuprofen ((1.2 ± 1.1) × 106 M-1 s-1). Contributions from UV, reactive nitrogen species (RNS), hydroxyl radical (•OH), and CO3•- to the CEC decomposition in UV/NO3- in the presence and absence of HCO3- were investigated. In addition, possible transformation products and degradation pathways of triclosan, diclofenac, bisphenol A, and estrone in UV/NO3-/HCO3- were proposed based on the mass (MS) and MS2 spectra. Significant reduction in the cytotoxicity of bisphenol A was observed after the treatment with UV/NO3-/HCO3-.
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Affiliation(s)
- Ying Huang
- Environmental Engineering and Science, Department of Chemical and Environmental Engineering , University of Cincinnati , Cincinnati , Ohio 45221 , United States
| | - Minghao Kong
- Environmental Engineering and Science, Department of Chemical and Environmental Engineering , University of Cincinnati , Cincinnati , Ohio 45221 , United States
| | - Danielle Westerman
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , South Carolina 29208 , United States
| | - Elvis Genbo Xu
- Department of Environmental Sciences , University of California , Riverside , California 92521 , United States
| | - Scott Coffin
- Department of Environmental Sciences , University of California , Riverside , California 92521 , United States
| | - Kristin H Cochran
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , South Carolina 29208 , United States
| | - Yiqing Liu
- Environmental Engineering and Science, Department of Chemical and Environmental Engineering , University of Cincinnati , Cincinnati , Ohio 45221 , United States
- Faculty of Geosciences and Environmental Engineering , Southwest Jiaotong University , Chengdu 611756 , China
| | - Susan D Richardson
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , South Carolina 29208 , United States
| | - Daniel Schlenk
- Department of Environmental Sciences , University of California , Riverside , California 92521 , United States
| | - Dionysios D Dionysiou
- Environmental Engineering and Science, Department of Chemical and Environmental Engineering , University of Cincinnati , Cincinnati , Ohio 45221 , United States
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14
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Mewes JM, Jerabek P, Bohle DS, Schwerdtfeger P. The Light-Driven Isomerization of Aqueous Nitrate: A Theoretical Perspective. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201800022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jan-Michael Mewes
- The New Zealand Institute for Advanced Study; Massey University (Albany); Private Bag 102904, North Shore, 0632 Auckland New Zealand
| | - Paul Jerabek
- The New Zealand Institute for Advanced Study; Massey University (Albany); Private Bag 102904, North Shore, 0632 Auckland New Zealand
| | - D. Scott Bohle
- The Department of Chemistry; McGill University; 801 Sherbrooke St. W Montreal H3A 8B0 Canada
| | - Peter Schwerdtfeger
- The New Zealand Institute for Advanced Study; Massey University (Albany); Private Bag 102904, North Shore, 0632 Auckland New Zealand
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15
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Horne GP, Pimblott SM, LaVerne JA. Inhibition of Radiolytic Molecular Hydrogen Formation by Quenching of Excited State Water. J Phys Chem B 2017; 121:5385-5390. [PMID: 28492328 DOI: 10.1021/acs.jpcb.7b02775] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Comparison of experimental measurements of the yield of molecular hydrogen produced in the gamma radiolysis of water and aqueous nitrate solutions with predictions of a Monte Carlo track chemistry model shows that the nitrate anion scavenging of the hydrated electron, its precursor, and hydrogen atom cannot account for the observed decrease in the yield at high nitrate anion concentrations. Inclusion of the quenching of excited states of water (formed by either direct excitation or reaction of the water radical cation with the precursor to the hydrated electron) by the nitrate anion into the reaction scheme provides excellent agreement between the stochastic calculations and experiment demonstrating the existence of this short-lived species and its importance in water radiolysis. Energy transfer from the excited states of water to the nitrate anion producing an excited state provides an additional pathway for the production of nitrogen containing products not accounted for in traditional radiation chemistry scenarios. Such reactions are of central importance in predicting the behavior of liquors common in the reprocessing of spent nuclear fuel and the storage of highly radioactive liquid waste prior to vitrification.
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Affiliation(s)
- Gregory P Horne
- California State University at Long Beach , Long Beach, California 90804, United States.,Radiation Laboratory, University of Notre Dame , Notre Dame, Indiana 46556, United States
| | - Simon M Pimblott
- Dalton Cumbrian Facility, The University of Manchester , Westlakes Science and Technology Park, Cumbria CA24 3HA, U.K.,School of Chemistry, The University of Manchester , Oxford Road, Manchester M13 9PL, U.K
| | - Jay A LaVerne
- Radiation Laboratory, University of Notre Dame , Notre Dame, Indiana 46556, United States.,Department of Physics, University of Notre Dame , Notre Dame, Indiana 46556, United States
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16
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Corcos AR, Pap JS, Yang T, Berry JF. A Synthetic Oxygen Atom Transfer Photocycle from a Diruthenium Oxyanion Complex. J Am Chem Soc 2016; 138:10032-40. [PMID: 27406958 PMCID: PMC5972014 DOI: 10.1021/jacs.6b05942] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three new diruthenium oxyanion complexes have been prepared, crystallographically characterized, and screened for their potential to photochemically unmask a reactive Ru-Ru═O intermediate. The most promising candidate, Ru2(chp)4ONO2 (4, chp = 6-chloro-2-hydroxypyridinate), displays a set of signals centered around m/z = 733 amu in its MALDI-TOF mass spectrum, consistent with the formation of the [Ru2(chp)4O](+) ([6](+)) ion. These signals shift to 735 amu in 4*, which contains an (18)O-labeled nitrate. EPR spectroscopy and headspace GC-MS analysis indicate that NO2(•) is released upon photolysis of 4, also consistent with the formation of 6. Photolysis of 4 in CH2Cl2 at room temperature in the presence of excess PPh3 yields OPPh3 in 173% yield; control experiments implicate 6, NO2(•), and free NO3(-) as the active oxidants. Notably, Ru2(chp)4Cl (3) is recovered after photolysis. Since 3 is the direct precursor to 4, the results described herein constitute the first example of a synthetic cycle for oxygen atom transfer that makes use of light to generate a putative metal oxo intermediate.
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Affiliation(s)
- Amanda R. Corcos
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave., Madison, Wisconsin, 53706, USA
| | - József S. Pap
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave., Madison, Wisconsin, 53706, USA
| | - Tzuhsiung Yang
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave., Madison, Wisconsin, 53706, USA
| | - John F. Berry
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave., Madison, Wisconsin, 53706, USA
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17
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Herrmann H, Schaefer T, Tilgner A, Styler SA, Weller C, Teich M, Otto T. Tropospheric aqueous-phase chemistry: kinetics, mechanisms, and its coupling to a changing gas phase. Chem Rev 2015; 115:4259-334. [PMID: 25950643 DOI: 10.1021/cr500447k] [Citation(s) in RCA: 204] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hartmut Herrmann
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Thomas Schaefer
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Andreas Tilgner
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Sarah A Styler
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Christian Weller
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Monique Teich
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
| | - Tobias Otto
- Atmospheric Chemistry Department (ACD), Leibniz Institute for Tropospheric Research (TROPOS), Permoserstraße 15, 04318 Leipzig, Germany
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18
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Vibrational relaxation of NO3−(aq). Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Gadegaard AR, Thøgersen J, Jensen SK, Nielsen JB, Jena NK, Odelius M, Jensen F, Keiding SR. Spectroscopy and picosecond dynamics of aqueous NO2. J Chem Phys 2014; 141:064310. [DOI: 10.1063/1.4892342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Meusinger C, Berhanu TA, Erbland J, Savarino J, Johnson MS. Laboratory study of nitrate photolysis in Antarctic snow. I. Observed quantum yield, domain of photolysis, and secondary chemistry. J Chem Phys 2014; 140:244305. [DOI: 10.1063/1.4882898] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Affiliation(s)
- Carl Meusinger
- Department of Chemistry, University of Copenhagen, Copenhagen, Denmark
| | - Tesfaye A. Berhanu
- Univ. Grenoble Alpes, LGGE, F-38000 Grenoble, France
- CNRS, LGGE, F-38000 Grenoble, France
| | - Joseph Erbland
- Univ. Grenoble Alpes, LGGE, F-38000 Grenoble, France
- CNRS, LGGE, F-38000 Grenoble, France
| | - Joel Savarino
- Univ. Grenoble Alpes, LGGE, F-38000 Grenoble, France
- CNRS, LGGE, F-38000 Grenoble, France
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21
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Berhanu TA, Meusinger C, Erbland J, Jost R, Bhattacharya SK, Johnson MS, Savarino J. Laboratory study of nitrate photolysis in Antarctic snow. II. Isotopic effects and wavelength dependence. J Chem Phys 2014; 140:244306. [DOI: 10.1063/1.4882899] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Tesfaye A. Berhanu
- Laboratoire de Glaciologie et Géophysique de l’Environnement, CNRS, F-38041 Grenoble, France
- Univ. Grenoble Alpes, LGGE, F-38041 Grenoble, France
| | - Carl Meusinger
- Copenhagen Center for Atmospheric Research (CCAR), Department of Chemistry, University of Copenhagen, Copenhagen, Denmark
| | - Joseph Erbland
- Laboratoire de Glaciologie et Géophysique de l’Environnement, CNRS, F-38041 Grenoble, France
- Univ. Grenoble Alpes, LGGE, F-38041 Grenoble, France
| | - Rémy Jost
- Laboratoire de Interdisciplinaire de Physique (LIPHY) Univ. de Grenoble, Grenoble, France
| | - S. K. Bhattacharya
- Research Center for Environmental Changes, Academia Sinica, Nangang, Taipei 115, Taiwan
| | - Matthew S. Johnson
- Copenhagen Center for Atmospheric Research (CCAR), Department of Chemistry, University of Copenhagen, Copenhagen, Denmark
| | - Joël Savarino
- Laboratoire de Glaciologie et Géophysique de l’Environnement, CNRS, F-38041 Grenoble, France
- Univ. Grenoble Alpes, LGGE, F-38041 Grenoble, France
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22
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Svoboda O, Kubelová L, Slavíček P. Enabling Forbidden Processes: Quantum and Solvation Enhancement of Nitrate Anion UV Absorption. J Phys Chem A 2013; 117:12868-77. [DOI: 10.1021/jp4098777] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ondřej Svoboda
- Department of Physical Chemistry, Institute of Chemical Technology, Technická 5, 16628 Prague 6, Czech Republic
| | - Lucie Kubelová
- Department of Physical Chemistry, Institute of Chemical Technology, Technická 5, 16628 Prague 6, Czech Republic
| | - Petr Slavíček
- Department of Physical Chemistry, Institute of Chemical Technology, Technická 5, 16628 Prague 6, Czech Republic
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23
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Thøgersen J, Réhault J, Odelius M, Ogden T, Jena NK, Jensen SJK, Keiding SR, Helbing J. Hydration Dynamics of Aqueous Nitrate. J Phys Chem B 2013; 117:3376-88. [DOI: 10.1021/jp310090u] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jan Thøgersen
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus,
Denmark
| | - Julien Réhault
- Institute of Physical
Chemistry, University of Zürich,
Wintherthurerstrasse 190,
CH-8057, Zürich, Switzerland
| | - Michael Odelius
- Department of Physics, Albanova,
Roslagstullbacken 21, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Tom Ogden
- Department of Physics, Albanova,
Roslagstullbacken 21, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Naresh K. Jena
- Department of Physics, Albanova,
Roslagstullbacken 21, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Svend J. Knak Jensen
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus,
Denmark
| | - Søren R. Keiding
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus,
Denmark
| | - Jan Helbing
- Institute of Physical
Chemistry, University of Zürich,
Wintherthurerstrasse 190,
CH-8057, Zürich, Switzerland
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24
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Kriger LD, Miklin MB, Dyagileva EP, Anan’ev VA. Photolysis of alkaline-earth nitrates. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2013. [DOI: 10.1134/s0036024413020180] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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25
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26
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John B, Colin D. H. Catalysis or Convenience? Perborate in Context. ADVANCES IN INORGANIC CHEMISTRY 2013. [DOI: 10.1016/b978-0-12-404582-8.00006-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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27
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Thøgersen J, Nielsen J, Knak Jensen S, Keiding S, Odelius M, Ogden T, Réhault J, Helbing J. The rotation of NO 3−as a probe of molecular ion - water interactions. EPJ WEB OF CONFERENCES 2013. [DOI: 10.1051/epjconf/20134106002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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28
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Koppenol WH, Bounds PL, Nauser T, Kissner R, Rüegger H. Peroxynitrous acid: controversy and consensus surrounding an enigmatic oxidant. Dalton Trans 2012; 41:13779-87. [DOI: 10.1039/c2dt31526b] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Shkrob IA, Marin TW, Chemerisov SD, Wishart JF. Radiation and Radical Chemistry of NO3–, HNO3, and Dialkylphosphoric Acids in Room-Temperature Ionic Liquids. J Phys Chem B 2011; 115:10927-42. [DOI: 10.1021/jp206579j] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ilya A. Shkrob
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Timothy W. Marin
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department, Benedictine University, 5700 College Road, Lisle, Illinois 60532, United States
| | - S. D. Chemerisov
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - J. F. Wishart
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
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30
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Abstract
Coordination to transition-metal complexes changes both the thermodynamics and kinetics of oxygen reduction. Some of the intermediates (superoxo, hydroperoxo, and oxo species) are close analogues of organic oxygen-centered radicals and peroxides (ROO(*), ROOH, and RO(*)). Metal-based intermediates are typically less reactive, but more persistent, than organic radicals, which makes the two types of intermediates similarly effective in their reactions with various substrates. The self-exchange rate constant for hydrogen-atom transfer for the couples Cr(aq)OO(2+)/Cr(aq)OOH(2+) and L(1)(H(2)O)RhOO(2+)/L(1)(H(2)O)RhOOH(2+) was estimated to be 10(1+/-1) M(-1) s(-1). The use of this value in the simplified Marcus equation for the Cr(aq)O(2+)/Cr(aq)OOH(2+) cross reaction provided an upper limit k(CrO,CrOH) <or= 10((-2+/-1)) M(-1) s(-1) for Cr(aq)O(2+)/Cr(aq)OH(2+) self-exchange. Even though superoxo complexes react very slowly in bimolecular self-reactions, extremely fast cross reactions with organic counterparts, i.e., acylperoxyl radicals, have been observed. Many of the intermediates generated by the interaction of O(2) with reduced metal complexes can also be accessed by alternative routes, both thermal and photochemical.
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Affiliation(s)
- Andreja Bakac
- Ames Laboratory and Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
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31
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Dyer JM, Clerens S, Cornellison CD, Murphy CJ, Maurdev G, Millington KR. Photoproducts Formed in the Photoyellowing of Collagen in the Presence of a Fluorescent Whitening Agent. Photochem Photobiol 2009; 85:1314-21. [DOI: 10.1111/j.1751-1097.2009.00614.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Thøgersen J, Gadegaard A, Nielsen J, Jensen SK, Petersen C, Keiding SR. Primary Formation Dynamics of Peroxynitrite Following Photolysis of Nitrate. J Phys Chem A 2009; 113:10488-94. [DOI: 10.1021/jp906354c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jan Thøgersen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Ane Gadegaard
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Jakob Nielsen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Svend Knak Jensen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Christian Petersen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | - Søren R. Keiding
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark
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33
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Reeser DI, George C, Donaldson DJ. Photooxidation of Halides by Chlorophyll at the Air−Salt Water Interface. J Phys Chem A 2009; 113:8591-5. [DOI: 10.1021/jp903657j] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dorea I. Reeser
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6, Université de Lyon, Lyon, F-69626, France, and CNRS, UMR5256, IRCELYON, Institut de recherches sur la catalyse et l’environnement de Lyon, Villeurbanne F-69626, France
| | - Christian George
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6, Université de Lyon, Lyon, F-69626, France, and CNRS, UMR5256, IRCELYON, Institut de recherches sur la catalyse et l’environnement de Lyon, Villeurbanne F-69626, France
| | - D. J. Donaldson
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6, Université de Lyon, Lyon, F-69626, France, and CNRS, UMR5256, IRCELYON, Institut de recherches sur la catalyse et l’environnement de Lyon, Villeurbanne F-69626, France
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34
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Sturzbecher-Höhne M, Nauser T, Kissner R, Koppenol WH. Photon-Initiated Homolysis of Peroxynitrous Acid. Inorg Chem 2009; 48:7307-12. [DOI: 10.1021/ic900614e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Manuel Sturzbecher-Höhne
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Thomas Nauser
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Reinhard Kissner
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Willem H. Koppenol
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
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35
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Roca M, Zahardis J, Bone J, El-Maazawi M, Grassian VH. 310 nm Irradiation of Atmospherically Relevant Concentrated Aqueous Nitrate Solutions: Nitrite Production and Quantum Yields. J Phys Chem A 2008; 112:13275-81. [DOI: 10.1021/jp809017b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maryuri Roca
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, and Department of Physical Science and Engineering, Truman College, Chicago, Illinois 60640
| | - James Zahardis
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, and Department of Physical Science and Engineering, Truman College, Chicago, Illinois 60640
| | - Jason Bone
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, and Department of Physical Science and Engineering, Truman College, Chicago, Illinois 60640
| | - Mohamed El-Maazawi
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, and Department of Physical Science and Engineering, Truman College, Chicago, Illinois 60640
| | - Vicki H. Grassian
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, and Department of Physical Science and Engineering, Truman College, Chicago, Illinois 60640
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36
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Knudsgaard B, Petersen C, Thøgersen J, Keiding SR, Jensen SJK. Microscopic dynamics of a base protonation. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.08.077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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37
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Cheng M, Bakac A. Photochemical Oxidation of Halide Ions by a Nitratochromium(III) Complex. Kinetics, Mechanism, and Intermediates. J Am Chem Soc 2008; 130:5600-5. [DOI: 10.1021/ja8000453] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mingming Cheng
- Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Andreja Bakac
- Department of Chemistry, Iowa State University, Ames, Iowa 50011
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38
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Petersen C, Dahl NH, Jensen SK, Poulsen JA, Thøgersen J, Keiding SR. Femtosecond Photolysis of Aqueous Formamide. J Phys Chem A 2008; 112:3339-44. [DOI: 10.1021/jp7110764] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christian Petersen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark and Department of Chemistry, Göteborg University, SE-412 96 Göteborg, Sweden
| | - Niels Henning Dahl
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark and Department of Chemistry, Göteborg University, SE-412 96 Göteborg, Sweden
| | - Svend Knak Jensen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark and Department of Chemistry, Göteborg University, SE-412 96 Göteborg, Sweden
| | - Jens Aage Poulsen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark and Department of Chemistry, Göteborg University, SE-412 96 Göteborg, Sweden
| | - Jan Thøgersen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark and Department of Chemistry, Göteborg University, SE-412 96 Göteborg, Sweden
| | - Søren Rud Keiding
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark and Department of Chemistry, Göteborg University, SE-412 96 Göteborg, Sweden
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39
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Petersen C, Thøgersen J, Jensen SK, Keiding SR. Electron Detachment and Relaxation of OH-(aq). J Phys Chem A 2007; 111:11410-20. [DOI: 10.1021/jp0745438] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Jan Thøgersen
- University of Aarhus, Langelandsgade 140, DK-8000, Aarhus C, Denmark
| | - Svend Knak Jensen
- University of Aarhus, Langelandsgade 140, DK-8000, Aarhus C, Denmark
| | - Søren R. Keiding
- University of Aarhus, Langelandsgade 140, DK-8000, Aarhus C, Denmark
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Goldstein S, Rabani J. Mechanism of nitrite formation by nitrate photolysis in aqueous solutions: the role of peroxynitrite, nitrogen dioxide, and hydroxyl radical. J Am Chem Soc 2007; 129:10597-601. [PMID: 17676847 DOI: 10.1021/ja073609+] [Citation(s) in RCA: 122] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Photolysis of aqueous NO3(-) with lambda > or = 195 nm is known to induce the formation of NO2(-) and O2 as the only stable products. The mechanism of NO3- photolysis, however, is complex, and there is still uncertainty about the primary photoprocesses and subsequent reactions. This is, in part, due to photoisomerization of NO3(-) to ONOO(-) at lambda < 280 nm, followed by the formation of *OH and *NO2 through the decomposition of ONOOH (pKa = 6.5-6.8). Because of incomplete information concerning the mechanism of peroxynitrite (ONOOH/ONOO(-)) decomposition, previous studies were unable to account for all observations. In the present study aqueous nitrate solutions were photolyzed by monochromatic light in the range of 205-300 nm. It is shown that the main primary processes at this wavelength range are NO3(-) hv-->*NO2 + O*(-) (reaction 1) and NO3(-) hv--> ONOO(-) (reaction 2). Based on recent knowledge on the mechanisms of peroxynitrite decomposition and its reactions with reactive nitrogen and oxygen species, we determined Phi(1) and Phi(2) using different experimental approaches. Both quantum yields increase with decreasing the excitation wavelength, approaching Phi(1) = 0.13 and Phi(2) = 0.28 at 205 nm. It is also shown that the yield of nitrite increases with decreasing the excitation wavelength. The implications of these results on UV disinfection of drinking water are discussed.
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Affiliation(s)
- Sara Goldstein
- Department of Physical Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
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Hellebust S, Roddis T, Sodeau JR. Potential Role of the Nitroacidium Ion on HONO Emissions from the Snowpack. J Phys Chem A 2007; 111:1167-71. [PMID: 17263519 DOI: 10.1021/jp068264g] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The effects of photolysis on frozen, thin films of water-ice containing nitrogen dioxide (as its dimer dinitrogen tetroxide) have been investigated using a combination of Fourier transform reflection-absorption infrared (FT-RAIR) spectroscopy and mass spectrometry. The release of HONO is ascribed to a mechanism in which nitrosonium nitrate (NO+NO3-) is formed. Subsequent solvation of the cation leads to the nitroacidium ion, H2ONO+, i.e., protonated nitrous acid. The pathway proposed explains why the field measurement of HONO at different polar sites is often contradictory.
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Moskun AC, Bradforth SE, Thøgersen J, Keiding S. Absence of a Signature of Aqueous I(2P1/2) after 200-nm Photodetachment of I-(aq). J Phys Chem A 2006; 110:10947-55. [PMID: 16986827 DOI: 10.1021/jp053992+] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ultrafast pump-broadband probe spectroscopy was used to study the transient photoproducts following 200-nm photodetachment of I(-)(aq). Resonant detachment at 200 nm in the second charge-transfer-to-solvent (CTTS) band of I(-)(aq) is expected to produce an electron and iodine in its spin-orbit excited state, I*((2)P(1/2)). The transients in solution following photodetachment were probed from 200 to 620 nm. Along with strong absorption in the visible region due to solvated electrons and a strong bleach of the I(-)(aq) ground-state absorption, a weaker transient absorption near 260 nm was observed that is consistent with a previously assigned ground-state I((2)P(3/2)) charge-transfer band. However, no evidence was found for an equivalent I*(aq) charge-transfer absorption, and I((2)P(3/2)) was produced within the instrument response. This suggests either that I* is electronically relaxed in less than 300 fs or that excitation in the second CTTS band does not in fact lead to I*. The consequences for previous experimental work where I*(aq) production has been postulated, as well as for halogen electron ejection mechanisms, are discussed. In addition, the broad spectral coverage of this study reveals in the bleach recovery the rapid cooling of the solvent surrounding the re-formed iodide after geminate recombination of the iodine with the solvated electron.
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Affiliation(s)
- Amy C Moskun
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
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Suzuki T, Inukai M. Effects of nitrite and nitrate on DNA damage induced by ultraviolet light. Chem Res Toxicol 2006; 19:457-62. [PMID: 16544952 DOI: 10.1021/tx050347l] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
UV light is a major cause of human skin cancers. Nitrite and nitrate are well-known potential risk factors for gastric cancer. Little attention has been paid to the relationship between UV light and nitrite or nitrate on cancer. We examined the effects of nitrite and nitrate on the damage to nucleosides and DNA induced by UV light from a mercury lamp and by sunlight at neutral pH. A biologically relevant dose of nitrite and nitrate increased the generation of nucleobases and malondialdehyde on the reaction of nucleosides and DNA with UV light. The efficiency of nitrite enhancing the reaction was higher than that of nitrate at low doses. The contribution of the hydroxyl radical as the reactive species was suggested from the results of the inhibitory effects of hydroxyl radical scavengers. Nitrite and nitrate also enhanced the formation of nucleobases and malondialdehyde from DNA induced by sunlight. In the presence of 5 muM nitrite, the concentration in human skin cells, the product yields by sunlight were 5-10-fold greater than those in the absence of nitrite. The addition of 80 muM NO(3)(-), a concentration in human skin cells, also increased the yields significantly. Nitrite and nitrate may play a role in enhancing the genotoxic effects of UV light in humans.
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Affiliation(s)
- Toshinori Suzuki
- Department of Biological Pharmacy, School of Pharmacy, Shujitsu University, 1-6-1 Nishigawara, Okayama 703-8516, Japan.
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Sayama K, Abe R, Arakawa H, Sugihara H. Decomposition of water into H2 and O2 by a two-step photoexcitation reaction over a Pt–TiO2 photocatalyst in NaNO2 and Na2CO3 aqueous solution. CATAL COMMUN 2006. [DOI: 10.1016/j.catcom.2005.09.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Dyer JM, Bringans SD, Bryson WG. Determination of Photo-oxidation Products Within Photoyellowed Bleached Wool Proteins. Photochem Photobiol 2006; 82:551-7. [PMID: 16613512 DOI: 10.1562/2005-08-29-ra-663] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Photo-oxidative processes occurring in wool can lead to significant photoyellowing of the fiber. In particular, wool that has been chemically bleached photoyellows more rapidly and to a greater degree than untreated wool. Direct identification of the chromophores responsible for such yellow discoloration in irradiated wool has proven to be elusive for many years. This article describes the characterization and location of yellow photo-oxidation products within the proteins of photoyellowed bleached wool fabric, using advanced protein chemistry techniques. The discolored fabric was enzymatically digested and chromatographed by high-pressure liquid chromatography, with monitoring at 400 nm, to select out fractions containing yellow chromophoric species. Thorough tandem mass spectrometric analysis was then used to sequence peptides and, in turn, to characterize modifications to key amino acid residues that had resulted in yellow chromophore formation. In total, 11 separate yellow chromophoric species were identified, ten derived from tryptophan residues and one from tyrosine. The tryptophan-derived modifications characterized included hydroxytryptophan, N-formylkynurenine, hydroxyformylkynurenine, kynurenine, hydroxykynurenine, carbolines, tryptophandiones and nitrotryptophan. The tyrosine-derived modification of tyrosine to dopa was also identified. The range of photomodifications we observed provides insight into the photo-oxidation pathways occurring within irradiated fibrous proteins leading to the formation of yellow chromophores.
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Affiliation(s)
- Jolon M Dyer
- Canesis Network Limited, Private Bag 4749, Christchurch, New Zealand.
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McCabe JR. Oxygen isotopic fractionation in the photochemistry of nitrate in water and ice. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004jd005484] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Thøgersen J, Jensen SK, Christiansen O, Keiding SR. Fast Photodynamics of Aqueous Formic Acid. J Phys Chem A 2004. [DOI: 10.1021/jp048593d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jan Thøgersen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK 8000 Århus C, Denmark
| | - Svend Knak Jensen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK 8000 Århus C, Denmark
| | - Ove Christiansen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK 8000 Århus C, Denmark
| | - Søren R. Keiding
- Department of Chemistry, University of Aarhus, Langelandsgade 140, DK 8000 Århus C, Denmark
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Keiding SR, Madsen D, Larsen J, Jensen SK, Thøgersen J. When molecules meet: a femtosecond study of the protonation of a base. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.03.143] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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