Heterogeneous reactivity of nitric acid with nascent sea spray aerosol: Large differences observed between and within individual particles

TitleHeterogeneous reactivity of nitric acid with nascent sea spray aerosol: Large differences observed between and within individual particles
Publication TypeJournal Article
Year of Publication2014
AuthorsAult AP, Guasco TL, Baltrusaitis J, Ryder OS, Trueblood J.V, Collins DB, Ruppel MJ, Cuadra-Rodriguez LA, Prather KA, Grassian VH
JournalJournal of Physical Chemistry Letters
Volume5
Pagination2493-2500
Date Published2014/08
Type of ArticleArticle
ISBN Number1948-7185
Accession NumberWOS:000340222200001
Keywordsatmospheric particles; chloride; n2o5; physical-chemistry; sodium; spectroscopy; sulfuric-acid; sum-frequency generation; water
Abstract

Current climate and atmospheric chemistry models assume that all sea spray particles react as if they are pure NaCl. However, recent studies of sea spray aerosol particles have shown that distinct particle types exist (including sea salt, organic carbon, and biological particles) as well as mixtures of these and, within each particle type, there is a range of single-particle chemical compositions. Because of these differences, individual particles should display a range of reactivities with trace atmospheric gases. Herein, to address this, we study the composition of individual sea spray aerosol particles after heterogeneous reaction with nitric acid. As expected, a replacement reaction of chloride with nitrate is observed; however, there is a large range of reactivities spanning from no reaction to complete reaction between and within individual sea spray aerosol particles. These data clearly support the need for laboratory studies of individual, environmentally relevant particles to improve our fundamental understanding as to the properties that determine reactivity.

DOI10.1021/jz5008802
Integrated Research Themes: 
Student Publication: 
No