Ion Partitioning at the liquid/vapor interface of a multi-component alkali halidesolution: A model for aqueous sea salt aerosols
The chemistry of Br species associated with sea salt ice and aerosols has been implicated in the episodes of ozone depletion reported at Arctic sunrise. However, Br{sup -} is only a minor component in sea salt, which has a Br{sup -}/Cl{sup -} molar ratio of {approx}0.0015. Sea salt is a complex mixt...
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ftosti:oai:osti.gov:946743 2023-07-30T04:01:53+02:00 Ion Partitioning at the liquid/vapor interface of a multi-component alkali halidesolution: A model for aqueous sea salt aerosols Ghosal, Sutapa Brown, Matthew A. Bluhm, Hendrik Krisch, Maria J. Salmeron, Miquel Jungwirth, Pavel Hemminger, John C. 2009-12-16 application/pdf http://www.osti.gov/servlets/purl/946743 https://www.osti.gov/biblio/946743 unknown http://www.osti.gov/servlets/purl/946743 https://www.osti.gov/biblio/946743 36 AEROSOLS AVAILABILITY CHEMISTRY HALIDES MIXTURES OZONE SEAS X-RAY PHOTOELECTRON SPECTROSCOPY 2009 ftosti 2023-07-11T08:46:51Z The chemistry of Br species associated with sea salt ice and aerosols has been implicated in the episodes of ozone depletion reported at Arctic sunrise. However, Br{sup -} is only a minor component in sea salt, which has a Br{sup -}/Cl{sup -} molar ratio of {approx}0.0015. Sea salt is a complex mixture of many different species, with NaCl as the primary component. In recent years experimental and theoretical studies have reported enhancement of the large, more polarizable halide ion at the liquid/vapor interface of corresponding aqueous alkali halide solutions. The proposed enhancement is likely to influence the availability of sea salt Br{sup -} for heterogeneous reactions such as those involved in the ozone depletion episodes. We report here ambient pressure x-ray photoelectron spectroscopy studies and molecular dynamics simulations showing direct evidence of Br{sup -} enhancement at the interface of an aqueous NaCl solution doped with bromide. The experiments were carried out on samples with Br{sup -}/Cl{sup -} ratios in the range 0.1% to 10%, the latter being also the ratio for which simulations were carried out. This is the first direct measurement of interfacial enhancement of Br{sup -} in a multi-component solution with particular relevance to sea salt chemistry. Other/Unknown Material Arctic SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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36 AEROSOLS AVAILABILITY CHEMISTRY HALIDES MIXTURES OZONE SEAS X-RAY PHOTOELECTRON SPECTROSCOPY |
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36 AEROSOLS AVAILABILITY CHEMISTRY HALIDES MIXTURES OZONE SEAS X-RAY PHOTOELECTRON SPECTROSCOPY Ghosal, Sutapa Brown, Matthew A. Bluhm, Hendrik Krisch, Maria J. Salmeron, Miquel Jungwirth, Pavel Hemminger, John C. Ion Partitioning at the liquid/vapor interface of a multi-component alkali halidesolution: A model for aqueous sea salt aerosols |
topic_facet |
36 AEROSOLS AVAILABILITY CHEMISTRY HALIDES MIXTURES OZONE SEAS X-RAY PHOTOELECTRON SPECTROSCOPY |
description |
The chemistry of Br species associated with sea salt ice and aerosols has been implicated in the episodes of ozone depletion reported at Arctic sunrise. However, Br{sup -} is only a minor component in sea salt, which has a Br{sup -}/Cl{sup -} molar ratio of {approx}0.0015. Sea salt is a complex mixture of many different species, with NaCl as the primary component. In recent years experimental and theoretical studies have reported enhancement of the large, more polarizable halide ion at the liquid/vapor interface of corresponding aqueous alkali halide solutions. The proposed enhancement is likely to influence the availability of sea salt Br{sup -} for heterogeneous reactions such as those involved in the ozone depletion episodes. We report here ambient pressure x-ray photoelectron spectroscopy studies and molecular dynamics simulations showing direct evidence of Br{sup -} enhancement at the interface of an aqueous NaCl solution doped with bromide. The experiments were carried out on samples with Br{sup -}/Cl{sup -} ratios in the range 0.1% to 10%, the latter being also the ratio for which simulations were carried out. This is the first direct measurement of interfacial enhancement of Br{sup -} in a multi-component solution with particular relevance to sea salt chemistry. |
author |
Ghosal, Sutapa Brown, Matthew A. Bluhm, Hendrik Krisch, Maria J. Salmeron, Miquel Jungwirth, Pavel Hemminger, John C. |
author_facet |
Ghosal, Sutapa Brown, Matthew A. Bluhm, Hendrik Krisch, Maria J. Salmeron, Miquel Jungwirth, Pavel Hemminger, John C. |
author_sort |
Ghosal, Sutapa |
title |
Ion Partitioning at the liquid/vapor interface of a multi-component alkali halidesolution: A model for aqueous sea salt aerosols |
title_short |
Ion Partitioning at the liquid/vapor interface of a multi-component alkali halidesolution: A model for aqueous sea salt aerosols |
title_full |
Ion Partitioning at the liquid/vapor interface of a multi-component alkali halidesolution: A model for aqueous sea salt aerosols |
title_fullStr |
Ion Partitioning at the liquid/vapor interface of a multi-component alkali halidesolution: A model for aqueous sea salt aerosols |
title_full_unstemmed |
Ion Partitioning at the liquid/vapor interface of a multi-component alkali halidesolution: A model for aqueous sea salt aerosols |
title_sort |
ion partitioning at the liquid/vapor interface of a multi-component alkali halidesolution: a model for aqueous sea salt aerosols |
publishDate |
2009 |
url |
http://www.osti.gov/servlets/purl/946743 https://www.osti.gov/biblio/946743 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
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Arctic |
op_relation |
http://www.osti.gov/servlets/purl/946743 https://www.osti.gov/biblio/946743 |
_version_ |
1772812623395422208 |