The gas-phase formation mechanism of iodic acid as an atmospheric aerosol source

被引：0

作者：

Henning Finkenzeller

Siddharth Iyer

Xu-Cheng He

Mario Simon

Theodore K. Koenig

Christopher F. Lee

Rashid Valiev

Victoria Hofbauer

Antonio Amorim

Rima Baalbaki

Andrea Baccarini

Lisa Beck

David M. Bell

Lucía Caudillo

Dexian Chen

Randall Chiu

Biwu Chu

Lubna Dada

Jonathan Duplissy

Martin Heinritzi

Deniz Kemppainen

Changhyuk Kim

Jordan Krechmer

Andreas Kürten

Alexandr Kvashnin

Houssni Lamkaddam

Chuan Ping Lee

Katrianne Lehtipalo

Zijun Li

Vladimir Makhmutov

Hanna E. Manninen

Guillaume Marie

Ruby Marten

Roy L. Mauldin

Bernhard Mentler

Tatjana Müller

Tuukka Petäjä

Maxim Philippov

Ananth Ranjithkumar

Birte Rörup

Jiali Shen

Dominik Stolzenburg

Christian Tauber

Yee Jun Tham

António Tomé

Miguel Vazquez-Pufleau

Andrea C. Wagner

Dongyu S. Wang

Mingyi Wang

Yonghong Wang

机构：

[1] University of Colorado Boulder,Department of Chemistry

[2] University of Colorado Boulder,Cooperative Institute for Research in Environmental Sciences

[3] Tampere University,Aerosol Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences

[4] University of Helsinki,Institute for Atmospheric and Earth System Research

[5] Goethe University Frankfurt,Institute for Atmospheric and Environmental Sciences

[6] Peking University,State Key Joint Laboratory of Environmental Simulation and Pollution Control, BIC

[7] University of Helsinki,ESAT and IJRC, College of Environmental Sciences and Engineering

[8] Carnegie Mellon University,Department of Chemistry

[9] CENTRA and Faculdade de Ciências da Universidade de Lisboa,Center for Atmospheric Particle Studies

[10] Paul Scherrer Institute,Laboratory of Atmospheric Chemistry

[11] École Polytechnique Fédérale de Lausanne,Extreme Environments Research Laboratory

[12] Chinese Academy of Science,Research Center for Eco

[13] University of Helsinki,Environmental Sciences

[14] Pusan National University,Helsinki Institute of Physics (HIP) / Physics, Faculty of Science

[15] California Institute of Technology,School of Civil and Environmental Engineering

[16] Aerodyne Research,Division of Chemistry and Chemical Engineering

[17] P.N. Lebedev Physical Institute of the Russian Academy of Sciences,Department of Applied Physics

[18] Finnish Meteorological Institute,Institute of Ion and Applied Physics

[19] University of Eastern Finland,School of Earth and Environment

[20] Moscow Institute of Physics and Technology (National Research University),Faculty of Physics

[21] CERN,School of Marine Sciences

[22] the European Organization for Nuclear Research,Joint International Research Laboratory of Atmospheric and Earth System Research, School of Atmospheric Sciences

[23] University of Innsbruck,LACy UMR8105

[24] University of Leeds,Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Sciences and Engineering

[25] University of Vienna,undefined

[26] Sun Yat-sen University,undefined

[27] IDL-Universidade da Beira Interior,undefined

[28] Nanjing University,undefined

[29] Université de la Réunion,undefined

[30] Beijing University of Chemical Technology (BUCT),undefined

来源：

Nature Chemistry | 2023年 / 15卷

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摘要：

Iodine is a reactive trace element in atmospheric chemistry that destroys ozone and nucleates particles. Iodine emissions have tripled since 1950 and are projected to keep increasing with rising O3 surface concentrations. Although iodic acid (HIO3) is widespread and forms particles more efficiently than sulfuric acid, its gas-phase formation mechanism remains unresolved. Here, in CLOUD atmospheric simulation chamber experiments that generate iodine radicals at atmospherically relevant rates, we show that iodooxy hypoiodite, IOIO, is efficiently converted into HIO3 via reactions (R1) IOIO + O3 → IOIO4 and (R2) IOIO4 + H2O → HIO3 + HOI + (1)O2. The laboratory-derived reaction rate coefficients are corroborated by theory and shown to explain field observations of daytime HIO3 in the remote lower free troposphere. The mechanism provides a missing link between iodine sources and particle formation. Because particulate iodate is readily reduced, recycling iodine back into the gas phase, our results suggest a catalytic role of iodine in aerosol formation.

引用

页码：129 / 135

页数：6

共 116 条

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