1
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Zhang W, Issa K, Tang T, Zhang H. Role of Hydroperoxyl Radicals in Heterogeneous Oxidation of Oxygenated Organic Aerosols. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:4727-4736. [PMID: 38411392 DOI: 10.1021/acs.est.3c09024] [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: 02/28/2024]
Abstract
Heterogeneous oxidative aging of organic aerosols (OA) occurs ubiquitously in the atmosphere, initiated by oxidants, such as the hydroxyl radicals (•OH). Hydroperoxyl radicals (HO2•) are also an important oxidant in the troposphere, and its gas-phase chemistry has been well studied. However, the role of HO2• in heterogeneous OA oxidation remains elusive. Here, we carry out •OH-initiated heterogeneous oxidation of several OA model systems under different HO2• conditions in a flow tube reactor and characterize the molecular oxidation products using a suite of mass spectrometry instrumentation. By using hydrogen-deuterium exchange (HDX) with thermal desorption iodide-adduct chemical ionization mass spectrometry, we provide direct observation of organic hydroperoxide (ROOH) formation from heterogeneous HO2• and peroxy radicals (RO2•) reactions for the first time. The ROOH may contribute substantially to the oxidation products, varied with the parent OA chemical structure. Furthermore, by regulating RO2• reaction pathways, HO2• also greatly influence the overall composition of the oxidized OA. Last, we suggest that the RO2• + HO2• reactions readily occur at the OA particle interface rather than in the particle bulk. These findings provide new mechanistic insights into the heterogeneous OA oxidation chemistry and help fill the critical knowledge gap in understanding atmospheric OA oxidative aging.
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Affiliation(s)
- Wen Zhang
- Department of Chemistry, University of California, Riverside, California 92507, United States
| | - Kassem Issa
- Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, California 92507, United States
| | - Tiffany Tang
- Department of Chemistry, University of California, Riverside, California 92507, United States
| | - Haofei Zhang
- Department of Chemistry, University of California, Riverside, California 92507, United States
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2
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Zhou J, Fukusaki Y, Murano K, Gautam T, Bai Y, Inomata Y, Komatsu H, Takeda M, Yuan B, Shao M, Sakamoto Y, Kajii Y. Investigation of HO 2 uptake mechanisms onto multiple-component ambient aerosols collected in summer and winter time in Yokohama, Japan. J Environ Sci (China) 2024; 137:18-29. [PMID: 37980006 DOI: 10.1016/j.jes.2023.02.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 02/13/2023] [Accepted: 02/13/2023] [Indexed: 11/20/2023]
Abstract
The heterogeneous loss of HO2 radicals onto ambient aerosols plays an important role in tropospheric chemistry. However, sparse investigation of the dominating parameters controlling the HO2 uptake coefficients onto ambient aerosols (γHO2) has largely hindered the application of the measured γHO2 to the global spatial prediction. Here we induced an offline method using LFP-LIF technique to measure the kinetics of HO2 uptake onto ambient aerosols collected in summertime and wintertime in Yokohama city, a regional urban site near Tokyo, Japan. By controlling the dominating parameters which influence γHO2, we were able to investigate the detailed HO2 uptake mechanism. We characterized the chemical composition of the collected ambient aerosols, including organics, inorganics, transition metals ions, etc. and modeled γHO2 using different mechanisms. Results show that γHO2 increased with the increase in RH, and the aerosol states ("dry" or wet/aqueous) have large effects on γHO2. With fixed RH and aerosol chemical composition, γHO2was highly dependent on pH and inversely correlated with [HO2]0. By combing the measured γHO2 values with the modeled ones, we found that both the HO2 self-reaction and transition metal-catalyzed reactions should be accounted for to yield a single parameterization to predict γHO2, and different chemical compositions may have collective effects on γHO2. Results may serve for extending the γHO2 values measured at one observation site to different environmental conditions, which will help us to achieve more accurate modeling results concerning secondary pollutant formation (i.e., ozone).
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Affiliation(s)
- Jun Zhou
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation forEnvironmental Quality, Guangzhou 511443, China; Graduate School of Global Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan.
| | - Yukiko Fukusaki
- Yokohama Environmental Science Research Institute, Yokohama Kanagawa 221‒0024, Japan
| | - Kentaro Murano
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan
| | - Tania Gautam
- Department of Chemistry, University of Alberta, Alberta, Edmonton T6G 2G2, Canada
| | - Yu Bai
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan
| | - Yoshimi Inomata
- Yokohama Environmental Science Research Institute, Yokohama Kanagawa 221‒0024, Japan
| | - Hiroaki Komatsu
- Kanagawa Environmental Research Center, Kanagawa 254-0014, Japan
| | - Mayuko Takeda
- Kanagawa Environmental Research Center, Kanagawa 254-0014, Japan
| | - Bin Yuan
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation forEnvironmental Quality, Guangzhou 511443, China
| | - Min Shao
- Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China; Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation forEnvironmental Quality, Guangzhou 511443, China
| | - Yosuke Sakamoto
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan; Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan; Center for Regional Environmental Research, National Institute for Environmental Studies, Ibaraki, 305-8506, Japan
| | - Yoshizumi Kajii
- Graduate School of Global Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan; Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan; Center for Regional Environmental Research, National Institute for Environmental Studies, Ibaraki, 305-8506, Japan.
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3
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Zhang W, Zhao Z, Shen C, Zhang H. Unexpectedly Efficient Aging of Organic Aerosols Mediated by Autoxidation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:6965-6974. [PMID: 37083304 DOI: 10.1021/acs.est.2c09773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Multiphase oxidative aging is a ubiquitous process for atmospheric organic aerosols (OA). But its kinetics was often found to be slow in previous laboratory studies where high hydroxyl radical concentrations ([•OH]) were used. In this study, we performed heterogeneous oxidation experiments of several model OA systems under varied aging timescales and gas-phase [•OH]. Our results suggest that OA heterogeneous oxidation may be 2-3 orders of magnitude faster when [•OH] is decreased from typical laboratory flow tube conditions to atmospheric levels. Direct laboratory mass spectrometry measurements coupled with kinetic simulations suggest that an intermolecular autoxidation mechanism mediated by particle-phase peroxy radicals greatly accelerates OA oxidation, with enhanced formation of organic hydroperoxides, alcohols, and fragmentation products. With autoxidation, we estimate that the OA oxidation timescale in the atmosphere may be from less than a day to several days. Thus, OA oxidative aging can have greater atmospheric impacts than previously expected. Furthermore, our findings reveal the nature of heterogeneous aerosol oxidation chemistry in the atmosphere and help improve the understanding and prediction of atmospheric OA aging and composition evolution.
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Affiliation(s)
- Wen Zhang
- Department of Chemistry, University of California, Riverside, California 92507, United States
| | - Zixu Zhao
- Department of Chemistry, University of California, Riverside, California 92507, United States
| | - Chuanyang Shen
- Department of Chemistry, University of California, Riverside, California 92507, United States
| | - Haofei Zhang
- Department of Chemistry, University of California, Riverside, California 92507, United States
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4
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Xu L, Crounse JD, Vasquez KT, Allen H, Wennberg PO, Bourgeois I, Brown SS, Campuzano-Jost P, Coggon MM, Crawford JH, DiGangi JP, Diskin GS, Fried A, Gargulinski EM, Gilman JB, Gkatzelis GI, Guo H, Hair JW, Hall SR, Halliday HA, Hanisco TF, Hannun RA, Holmes CD, Huey LG, Jimenez JL, Lamplugh A, Lee YR, Liao J, Lindaas J, Neuman JA, Nowak JB, Peischl J, Peterson DA, Piel F, Richter D, Rickly PS, Robinson MA, Rollins AW, Ryerson TB, Sekimoto K, Selimovic V, Shingler T, Soja AJ, St. Clair JM, Tanner DJ, Ullmann K, Veres PR, Walega J, Warneke C, Washenfelder RA, Weibring P, Wisthaler A, Wolfe GM, Womack CC, Yokelson RJ. Ozone chemistry in western U.S. wildfire plumes. SCIENCE ADVANCES 2021; 7:eabl3648. [PMID: 34878847 PMCID: PMC8654285 DOI: 10.1126/sciadv.abl3648] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Wildfires are a substantial but poorly quantified source of tropospheric ozone (O3). Here, to investigate the highly variable O3 chemistry in wildfire plumes, we exploit the in situ chemical characterization of western wildfires during the FIREX-AQ flight campaign and show that O3 production can be predicted as a function of experimentally constrained OH exposure, volatile organic compound (VOC) reactivity, and the fate of peroxy radicals. The O3 chemistry exhibits rapid transition in chemical regimes. Within a few daylight hours, the O3 formation substantially slows and is largely limited by the abundance of nitrogen oxides (NOx). This finding supports previous observations that O3 formation is enhanced when VOC-rich wildfire smoke mixes into NOx-rich urban plumes, thereby deteriorating urban air quality. Last, we relate O3 chemistry to the underlying fire characteristics, enabling a more accurate representation of wildfire chemistry in atmospheric models that are used to study air quality and predict climate.
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Affiliation(s)
- Lu Xu
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
- Corresponding author. (L.X.); (P.O.W.)
| | - John D. Crounse
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
| | - Krystal T. Vasquez
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Hannah Allen
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Paul O. Wennberg
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA
- Corresponding author. (L.X.); (P.O.W.)
| | - Ilann Bourgeois
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
| | - Steven S. Brown
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
| | - Pedro Campuzano-Jost
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
| | - Matthew M. Coggon
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
| | | | | | | | - Alan Fried
- Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, USA
| | | | | | - Georgios I. Gkatzelis
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
| | - Hongyu Guo
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
| | | | - Samuel R. Hall
- Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | | | - Thomas F. Hanisco
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - Reem A. Hannun
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA
- Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, Baltimore, MD, USA
| | - Christopher D. Holmes
- Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, USA
| | - L. Gregory Huey
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Jose L. Jimenez
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
| | - Aaron Lamplugh
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
| | - Young Ro Lee
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Jin Liao
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA
- Universities Space Research Association, Columbia, MD, USA
| | - Jakob Lindaas
- Department of Atmospheric Science, Colorado State University, Fort Collins, CO, USA
| | - J. Andrew Neuman
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
| | | | - Jeff Peischl
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
| | | | - Felix Piel
- Department of Chemistry, University of Oslo, Oslo, Norway
- IONICON Analytik GmbH, Innsbruck, Austria
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria
| | - Dirk Richter
- Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, USA
| | - Pamela S. Rickly
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
| | - Michael A. Robinson
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
- Department of Chemistry, University of Colorado Boulder, Boulder, CO, USA
| | | | | | - Kanako Sekimoto
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa, Japan
| | - Vanessa Selimovic
- Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, USA
| | | | - Amber J. Soja
- NASA Langley Research Center, Hampton, VA, USA
- National Institute of Aerospace, Hampton, VA, USA
| | - Jason M. St. Clair
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA
- Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, Baltimore, MD, USA
| | - David J. Tanner
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Kirk Ullmann
- Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
| | | | - James Walega
- Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, USA
| | | | | | - Petter Weibring
- Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, USA
| | - Armin Wisthaler
- Department of Chemistry, University of Oslo, Oslo, Norway
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria
| | - Glenn M. Wolfe
- Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA
- Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, Baltimore, MD, USA
| | - Caroline C. Womack
- NOAA Chemical Sciences Laboratory, Boulder, CO, USA
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
| | - Robert J. Yokelson
- Department of Chemistry and Biochemistry, University of Montana, Missoula, MT, USA
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5
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Diveky ME, Gleichweit MJ, Roy S, Signorell R. Shining New Light on the Kinetics of Water Uptake by Organic Aerosol Particles. J Phys Chem A 2021; 125:3528-3548. [PMID: 33739837 DOI: 10.1021/acs.jpca.1c00202] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The uptake of water vapor by various organic aerosols is important in a number of applications ranging from medical delivery of pharmaceutical aerosols to cloud formation in the atmosphere. The coefficient that describes the probability that the impinging gas-phase molecule sticks to the surface of interest is called the mass accommodation coefficient, αM. Despite the importance of this coefficient for the description of water uptake kinetics, accurate values are still lacking for many systems. In this Feature Article, we present various experimental techniques that have been evoked in the literature to study the interfacial transport of water and discuss the corresponding strengths and limitations. This includes our recently developed technique called photothermal single-particle spectroscopy (PSPS). The PSPS technique allows for a retrieval of αM values from three independent, yet simultaneous measurements operating close to equilibrium, providing a robust assessment of interfacial mass transport. We review the currently available data for αM for water on various organics and discuss the few studies that address the temperature and relative humidity dependence of αM for water on organics. The knowledge of the latter, for example, is crucial to assess the water uptake kinetics of organic aerosols in the Earth's atmosphere. Finally, we argue that PSPS might also be a viable method to better restrict the αM value for water on liquid water.
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Affiliation(s)
- Matus E Diveky
- Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Michael J Gleichweit
- Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Sandra Roy
- Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Ruth Signorell
- Laboratory of Physical Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
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6
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Tan Z, Hofzumahaus A, Lu K, Brown SS, Holland F, Huey LG, Kiendler-Scharr A, Li X, Liu X, Ma N, Min KE, Rohrer F, Shao M, Wahner A, Wang Y, Wiedensohler A, Wu Y, Wu Z, Zeng L, Zhang Y, Fuchs H. No Evidence for a Significant Impact of Heterogeneous Chemistry on Radical Concentrations in the North China Plain in Summer 2014. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:5973-5979. [PMID: 32343120 PMCID: PMC7240937 DOI: 10.1021/acs.est.0c00525] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 05/28/2023]
Abstract
The oxidation of nitric oxide to nitrogen dioxide by hydroperoxy (HO2) and organic peroxy radicals (RO2) is responsible for the chemical net ozone production in the troposphere and for the regeneration of hydroxyl radicals, the most important oxidant in the atmosphere. In Summer 2014, a field campaign was conducted in the North China Plain, where increasingly severe ozone pollution has been experienced in the last years. Chemical conditions in the campaign were representative for this area. Radical and trace gas concentrations were measured, allowing for calculating the turnover rates of gas-phase radical reactions. Therefore, the importance of heterogeneous HO2 uptake on aerosol could be experimentally determined. HO2 uptake could have suppressed ozone formation at that time because of the competition with gas-phase reactions that produce ozone. The successful reduction of the aerosol load in the North China Plain in the last years could have led to a significant decrease of HO2 loss on particles, so that ozone-forming reactions could have gained importance in the last years. However, the analysis of the measured radical budget in this campaign shows that HO2 aerosol uptake did not impact radical chemistry for chemical conditions in 2014. Therefore, reduced HO2 uptake on aerosol since then is likely not the reason for the increasing number of ozone pollution events in the North China Plain, contradicting conclusions made from model calculations reported in the literature.
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Affiliation(s)
- Zhaofeng Tan
- Institute
of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
| | - Andreas Hofzumahaus
- Institute
of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
| | - Keding Lu
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
- State
Key Joint Laboratory of Environmental Simulation and Pollution Control,
College of Environmental Sciences and Engineering, Peking University, 100871 Beijing, China
| | - Steven S. Brown
- Chemical
Sciences Division, NOAA Earth System Research
Laboratory, Boulder, Colorado 80309, United States
- Department
of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Frank Holland
- Institute
of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
| | - Lewis Gregory Huey
- School
of Earth and Atmospheric Sciences, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
| | - Astrid Kiendler-Scharr
- Institute
of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
| | - Xin Li
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
- State
Key Joint Laboratory of Environmental Simulation and Pollution Control,
College of Environmental Sciences and Engineering, Peking University, 100871 Beijing, China
| | - Xiaoxi Liu
- School
of Earth and Atmospheric Sciences, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
| | - Nan Ma
- Leibniz
Institute for Tropospheric Research, 04318 Leipzig, Germany
| | - Kyung-Eun Min
- Cooperative
Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Franz Rohrer
- Institute
of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
| | - Min Shao
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
- State
Key Joint Laboratory of Environmental Simulation and Pollution Control,
College of Environmental Sciences and Engineering, Peking University, 100871 Beijing, China
| | - Andreas Wahner
- Institute
of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
| | - Yuhang Wang
- School
of Earth and Atmospheric Sciences, Georgia
Institute of Technology, Atlanta, Georgia 30332, United States
| | | | - Yusheng Wu
- State
Key Joint Laboratory of Environmental Simulation and Pollution Control,
College of Environmental Sciences and Engineering, Peking University, 100871 Beijing, China
| | - Zhijun Wu
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
- State
Key Joint Laboratory of Environmental Simulation and Pollution Control,
College of Environmental Sciences and Engineering, Peking University, 100871 Beijing, China
| | - Limin Zeng
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
- State
Key Joint Laboratory of Environmental Simulation and Pollution Control,
College of Environmental Sciences and Engineering, Peking University, 100871 Beijing, China
| | - Yuanhang Zhang
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
- State
Key Joint Laboratory of Environmental Simulation and Pollution Control,
College of Environmental Sciences and Engineering, Peking University, 100871 Beijing, China
- Beijing
Innovation Center for Engineering Science and Advanced Technology, Peking University, 100871 Beijing, China
- CAS Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Science, 361000 Xiamen, China
| | - Hendrik Fuchs
- Institute
of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 52428 Jülich, Germany
- International
Joint Laboratory for Regional Pollution Control, 100871 Beijing, China
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7
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Zou Q, Song H, Tang M, Lu K. Measurements of HO2 uptake coefficient on aqueous (NH4)2SO4 aerosol using aerosol flow tube with LIF system. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.07.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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8
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Morrison G, Lakey PSJ, Abbatt J, Shiraiwa M. Indoor boundary layer chemistry modeling. INDOOR AIR 2019; 29:956-967. [PMID: 31461792 DOI: 10.1111/ina.12601] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/29/2019] [Accepted: 08/25/2019] [Indexed: 06/10/2023]
Abstract
Ozone (O3 ) chemistry is thought to dominate the oxidation of indoor surfaces. We consider the hypothesis that reactions taking place within indoor boundary layers result in greater than anticipated hydroxyl radical (OH) deposition rates. We develop models that account for boundary layer mass-transfer phenomena, O3 -terpene chemistry and OH formation, removal, and deposition; we solve these analytically and by applying numerical methods. For an O3 -limonene system, we find that OH flux to a surface with an O3 reaction probability of 10-8 is 4.3 × 10-5 molec/(cm2 s) which is about 10 times greater than predicted by a traditional boundary layer theory. At very low air exchange rates the OH surface flux can be as much as 10% of that for O3 . This effect becomes less pronounced for more O3 -reactive surfaces. Turbulence intensity does not strongly influence the OH concentration gradient except for surfaces with an O3 reaction probability >10-4 . Although the O3 flux dominates OH flux under most conditions, OH flux can be responsible for as much as 10% of total oxidant uptake to otherwise low-reactivity surfaces. Further, OH chemistry differs from that for ozone; therefore, its deposition is important in understanding the chemical evolution of some indoor surfaces and surface films.
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Affiliation(s)
- Glenn Morrison
- Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, NC, USA
| | | | - Jonathan Abbatt
- Department of Chemistry, University of Toronto, Toronto, ON, Canada
| | - Manabu Shiraiwa
- Department of Chemistry, University of California, Irvine, CA, USA
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9
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Wiegel AA, Liu MJ, Hinsberg WD, Wilson KR, Houle FA. Diffusive confinement of free radical intermediates in the OH radical oxidation of semisolid aerosols. Phys Chem Chem Phys 2018; 19:6814-6830. [PMID: 28218326 DOI: 10.1039/c7cp00696a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multiphase chemical reactions (gas + solid/liquid) involve a complex interplay between bulk and interface chemistry, diffusion, evaporation, and condensation. Reactions of atmospheric aerosols are an important example of this type of chemistry: the rich array of particle phase states and multiphase transformation pathways produce diverse but poorly understood interactions between chemistry and transport. Their chemistry is of intrinsic interest because of their role in controlling climate. Their characteristics also make them useful models for the study of principles of reactivity of condensed materials under confined conditions. In previous work, we have reported a computational study of the oxidation chemistry of a liquid aliphatic aerosol. In this study, we extend the calculations to investigate nearly the same reactions at a semisolid gas-aerosol interface. A reaction-diffusion model for heterogeneous oxidation of triacontane by hydroxyl radicals (OH) is described, and its predictions are compared to measurements of aerosol size and composition, which evolve continuously during oxidation. These results are also explicitly compared to those obtained for the corresponding liquid system, squalane, to pinpoint salient elements controlling reactivity. The diffusive confinement of the free radical intermediates at the interface results in enhanced importance of a few specific chemical processes such as the involvement of aldehydes in fragmentation and evaporation, and a significant role of radical-radical reactions in product formation. The simulations show that under typical laboratory conditions semisolid aerosols have highly oxidized nanometer-scale interfaces that encapsulate an unreacted core and may confer distinct optical properties and enhanced hygroscopicity. This highly oxidized layer dynamically evolves with reaction, which we propose to result in plasticization. The validated model is used to predict chemistry under atmospheric conditions, where the OH radical concentration is much lower. The oxidation reactions are more strongly influenced by diffusion in the particle, resulting in a more liquid-like character.
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Affiliation(s)
- Aaron A Wiegel
- Lawrence Berkeley National Laboratory, Chemical Sciences Division, Berkeley, CA 94702, USA.
| | - Matthew J Liu
- Lawrence Berkeley National Laboratory, Chemical Sciences Division, Berkeley, CA 94702, USA. and University of California, Berkeley, Department of Chemical and Biomolecular Engineering, Berkeley, CA 94702, USA
| | | | - Kevin R Wilson
- Lawrence Berkeley National Laboratory, Chemical Sciences Division, Berkeley, CA 94702, USA.
| | - Frances A Houle
- Lawrence Berkeley National Laboratory, Chemical Sciences Division, Berkeley, CA 94702, USA.
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Han C, Yang W, Wu Q, Yang H, Xue X. Heterogeneous Photochemical Conversion of NO2 to HONO on the Humic Acid Surface under Simulated Sunlight. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:5017-5023. [PMID: 27074517 DOI: 10.1021/acs.est.5b05101] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The poor understanding of HONO sources in the daytime highlights the importance of the heterogeneous photochemical reaction of NO2 with aerosol or soil surfaces. The conversion of NO2 to HONO on humic acid (HA) under simulated sunlight was investigated using a flow tube reactor at ambient pressure. The uptake coefficient (γ) of NO2 linearly increased with irradiation intensity and HA mass in the range of 0-2.0 μg/cm(2), while it decreased with the NO2 concentration. The HONO yield was found to be independent of irradiation intensity, HA mass, and NO2 concentration. The temperature (278-308 K) had little influence on both γ and HONO yield. Additionally, γ increased continuously with relative humidity (RH, 7-70%), and a maximum HONO yield was observed at 40% RH. The heterogeneous photochemical reaction of NO2 with HA was explained by the Langmuir-Hinshelwood mechanism.
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Affiliation(s)
- Chong Han
- School of Metallurgy, Northeastern University , Shenyang, Liaoning 110819, People's Republic of China
| | - Wangjin Yang
- School of Metallurgy, Northeastern University , Shenyang, Liaoning 110819, People's Republic of China
| | - Qianqian Wu
- School of Metallurgy, Northeastern University , Shenyang, Liaoning 110819, People's Republic of China
| | - He Yang
- School of Metallurgy, Northeastern University , Shenyang, Liaoning 110819, People's Republic of China
| | - Xiangxin Xue
- School of Metallurgy, Northeastern University , Shenyang, Liaoning 110819, People's Republic of China
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Lakey PSJ, George IJ, Baeza-Romero MT, Whalley LK, Heard DE. Organics Substantially Reduce HO2 Uptake onto Aerosols Containing Transition Metal ions. J Phys Chem A 2015; 120:1421-30. [DOI: 10.1021/acs.jpca.5b06316] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Maria T. Baeza-Romero
- Escuela
de Ingeniería Industrial de Toledo, Universidad de Castilla la Mancha, Avenida Carlos III s/n Real Fábrica de Armas, Toledo 45071, Spain
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