Simultaneous measurements of formaldehyde and nitrous acid in dews and gas phase in the atmosphere of Santiago,Chile |
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| Authors: | María A Rubio Eduardo Lissi Guillermo Villena YF Elshorbany Jörg Kleffmann Ralf Kurtenbach Peter Wiesen |
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| Institution: | 1. University of Wroc?aw, Department of Climatology and Atmosphere Protection, 8 Kosiby Str., 51-621 Wroc?aw, Poland;2. Gdańsk University of Technology, Department of Analytical Chemistry, Poland;3. Jagiellonian University, Department of Climatology, Poland;1. Emissions, Measurements and Modeling of the Atmosphere Laboratory, EGFEM Unit, Center for Analysis and Research, Faculty of Sciences, Saint Joseph University, Beirut, Lebanon;2. Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR7583, CNRS, Université Paris-Est-Créteil (UPEC) et Université Paris Diderot (UPD), Institut Pierre Simon Laplace (IPSL), Créteil, France;3. Institut de Combustion, Aérothermique, Réactivité et Environnement, CNRS, Orléans, France;1. State Key Laboratory for Structural Chemistry of Unstable and Stable Species, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China;4. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing 100029, PR China;5. School of Geography Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom;6. Beijing Urban Ecosystem Research Station, State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China;7. State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China |
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| Abstract: | The amounts of formaldehyde and nitrous acid (HONO) in gas phase and dews of Santiago de Chile were simultaneously measured. Formaldehyde concentrations values in the liquid phase (dews) correlate fairly well with those in the gaseous phase and are even higher than those expected from gas–dew equilibrium. On the other hand, nitrite concentrations in dews were considerably smaller (ca. 15 times) than those expected from the gas-phase concentrations. This under-saturation is attributed to diffusion limitations due to the relatively large HONO solubility. In agreement with this, under-saturation increases with the rate of dew formation and the pH of the collected waters, factors that should increase the rate of gas to liquid HONO transfer required to reach equilibrium. |
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