Experiments and Simulations of Ion-Enhanced Interfacial Chemistry on Aqueous NaCl Aerosols
A combination of experimental, molecular dynamics, and kinetics modeling studies is applied to a system of concentrated aqueous sodium chloride particles suspended in air at room temperature with ozone, irradiated at 254 nanometers to generate hydroxyl radicals. Measurements of the observed gaseous...
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American Association for the Advancement of Science (AAAS)
2000
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Online Access: | http://dx.doi.org/10.1126/science.288.5464.301 https://www.science.org/doi/pdf/10.1126/science.288.5464.301 |
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craaas:10.1126/science.288.5464.301 2024-06-23T07:55:07+00:00 Experiments and Simulations of Ion-Enhanced Interfacial Chemistry on Aqueous NaCl Aerosols Knipping, E. M. Lakin, M. J. Foster, K. L. Jungwirth, P. Tobias, D. J. Gerber, R. B. Dabdub, D. Finlayson-Pitts, B. J. 2000 http://dx.doi.org/10.1126/science.288.5464.301 https://www.science.org/doi/pdf/10.1126/science.288.5464.301 en eng American Association for the Advancement of Science (AAAS) Science volume 288, issue 5464, page 301-306 ISSN 0036-8075 1095-9203 journal-article 2000 craaas https://doi.org/10.1126/science.288.5464.301 2024-06-13T04:01:42Z A combination of experimental, molecular dynamics, and kinetics modeling studies is applied to a system of concentrated aqueous sodium chloride particles suspended in air at room temperature with ozone, irradiated at 254 nanometers to generate hydroxyl radicals. Measurements of the observed gaseous molecular chlorine product are explainable only if reactions at the air-water interface are dominant. Molecular dynamics simulations show the availability of substantial amounts of chloride ions for reaction at the interface, and quantum chemical calculations predict that in the gas phase chloride ions will strongly attract hydroxl radicals. Model extrapolation to the marine boundary layer yields daytime chlorine atom concentrations that are in good agreement with estimates based on field measurements of the decay of selected organics over the Southern Ocean and the North Atlantic. Thus, ion-enhanced interactions with gases at aqueous interfaces may play a more generalized and important role in the chemistry of concentrated inorganic salt solutions than was previously recognized. Article in Journal/Newspaper North Atlantic Southern Ocean AAAS Resource Center (American Association for the Advancement of Science) Southern Ocean Science 288 5464 301 306 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
A combination of experimental, molecular dynamics, and kinetics modeling studies is applied to a system of concentrated aqueous sodium chloride particles suspended in air at room temperature with ozone, irradiated at 254 nanometers to generate hydroxyl radicals. Measurements of the observed gaseous molecular chlorine product are explainable only if reactions at the air-water interface are dominant. Molecular dynamics simulations show the availability of substantial amounts of chloride ions for reaction at the interface, and quantum chemical calculations predict that in the gas phase chloride ions will strongly attract hydroxl radicals. Model extrapolation to the marine boundary layer yields daytime chlorine atom concentrations that are in good agreement with estimates based on field measurements of the decay of selected organics over the Southern Ocean and the North Atlantic. Thus, ion-enhanced interactions with gases at aqueous interfaces may play a more generalized and important role in the chemistry of concentrated inorganic salt solutions than was previously recognized. |
format |
Article in Journal/Newspaper |
author |
Knipping, E. M. Lakin, M. J. Foster, K. L. Jungwirth, P. Tobias, D. J. Gerber, R. B. Dabdub, D. Finlayson-Pitts, B. J. |
spellingShingle |
Knipping, E. M. Lakin, M. J. Foster, K. L. Jungwirth, P. Tobias, D. J. Gerber, R. B. Dabdub, D. Finlayson-Pitts, B. J. Experiments and Simulations of Ion-Enhanced Interfacial Chemistry on Aqueous NaCl Aerosols |
author_facet |
Knipping, E. M. Lakin, M. J. Foster, K. L. Jungwirth, P. Tobias, D. J. Gerber, R. B. Dabdub, D. Finlayson-Pitts, B. J. |
author_sort |
Knipping, E. M. |
title |
Experiments and Simulations of Ion-Enhanced Interfacial Chemistry on Aqueous NaCl Aerosols |
title_short |
Experiments and Simulations of Ion-Enhanced Interfacial Chemistry on Aqueous NaCl Aerosols |
title_full |
Experiments and Simulations of Ion-Enhanced Interfacial Chemistry on Aqueous NaCl Aerosols |
title_fullStr |
Experiments and Simulations of Ion-Enhanced Interfacial Chemistry on Aqueous NaCl Aerosols |
title_full_unstemmed |
Experiments and Simulations of Ion-Enhanced Interfacial Chemistry on Aqueous NaCl Aerosols |
title_sort |
experiments and simulations of ion-enhanced interfacial chemistry on aqueous nacl aerosols |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2000 |
url |
http://dx.doi.org/10.1126/science.288.5464.301 https://www.science.org/doi/pdf/10.1126/science.288.5464.301 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
Science volume 288, issue 5464, page 301-306 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.288.5464.301 |
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Science |
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288 |
container_issue |
5464 |
container_start_page |
301 |
op_container_end_page |
306 |
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1802647549332422656 |