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Missed Evaporation from Atmospherically Relevant Inorganic Mixtures Confounds Experimental Aerosol Studies
RISE Research Institutes of Sweden, Bioekonomi och hälsa, Material- och ytdesign. Lund University, Sweden.ORCID-id: 0000-0001-8650-4741
Lund University, Sweden.
Lund University, Sweden.
University of Oulu, Finland.
Vise andre og tillknytning
2023 (engelsk)Inngår i: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 57, nr 7, s. 2706-2714Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Sea salt aerosol particles are highly abundant in the atmosphere and play important roles in the global radiative balance. After influence from continental air, they are typically composed of Na+, Cl-, NH4+, and SO42- and organics. Analogous particle systems are often studied in laboratory settings by atomizing and drying particles from a solution. Here, we present evidence that such laboratory studies may be consistently biased in that they neglect losses of solutes to the gas phase. We present experimental evidence from a hygroscopic tandem differential mobility analyzer and an aerosol mass spectrometer, further supported by thermodynamic modeling. We show that, at normally prevailing laboratory aerosol mass concentrations, for mixtures of NaCl and (NH4)2SO4, a significant portion of the Cl- and NH4+ ions are lost to the gas phase, in some cases, leaving mainly Na2SO4 in the dry particles. Not considering losses of solutes to the gas phase during experimental studies will likely result in misinterpretation of the data. One example of such data is that from particle water uptake experiments. This may bias the explanatory models constructed from the data and introduce errors inte predictions made by air quality or climate models. © 2023 The Authors. 

sted, utgiver, år, opplag, sider
American Chemical Society , 2023. Vol. 57, nr 7, s. 2706-2714
Emneord [en]
hygroscopicity, thermodynamics, inorganic aerosol mixtures, sea salt, sea spray, Aerosols, Air quality, Climate models, Gases, Nitrogen compounds, Sodium chloride, Sodium sulfate, Thermodynamics, Aerosol particles, Gas-phases, Hygroscopicity, thermodynamic, Inorganic aerosol, Inorganic aerosol mixture, Inorganic mixtures, Radiative balance, Sea salt aerosol, Sea salts, Sulfur compounds
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Identifikatorer
URN: urn:nbn:se:ri:diva-64106DOI: 10.1021/acs.est.2c06545Scopus ID: 2-s2.0-85148002467OAI: oai:DiVA.org:ri-64106DiVA, id: diva2:1740100
Merknad

Funding details: AEROMET II 19ENV06; Funding details: Horizon 2020 Framework Programme, H2020, 717022; Funding details: European Research Council, ERC; Funding details: Svenska Forskningsrådet Formas; Funding details: Academy of Finland, AKA, 257411, 308238, 314175, 331532, 335649; Funding text 1: B.S. acknowledges SRA MERGE for creating a stimulating scientific community. B.S. and J.R. acknowledge FORMAS for financial support. C.P. acknowledges the Lund Institute of Technology for PostDoc funding. J.R. and A.C.E. further acknowledge financial support by the grant AEROMET II 19ENV06. N.L.P. and J.J.L. acknowledge funding from the Academy of Finland (Grant Nos. 257411, 308238, 314175, 331532, and 335649) and the European Research Council (ERC) under the European Union’s Horizon 2020 Research and Innovation Programme (Project SURFACE, Grant Agreement No. 717022).

Tilgjengelig fra: 2023-02-28 Laget: 2023-02-28 Sist oppdatert: 2023-07-06bibliografisk kontrollert

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