Heterogeneous Reactivity of Nitric Acid with Nascent Sea Spray Aerosol: Large Differences Observed between and within Individual Particles

被引：70

作者：

Ault, Andrew P. ^{[1
]}

Guasco, Timothy L. ^{[2
]}

Baltrusaitis, Jonas ^{[1
]}

Ryder, Olivia S. ^{[2
]}

Trueblood, Jonathan V. ^{[1
]}

Collins, Douglas B. ^{[2
]}

Ruppel, Matthew J. ^{[2
]}

Cuadra-Rodriguez, Luis A. ^{[2
]}

Prather, Kimberly A. ^{[2
,3
]}

Grassian, Vicki H. ^{[1
]}

机构：

[1] Univ Iowa, Dept Chem, Iowa City, IA 52242 USA

[2] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92037 USA

[3] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92037 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2014年 / 5卷 / 15期

基金：

美国国家科学基金会;

关键词：

SUM-FREQUENCY GENERATION; ATMOSPHERIC PARTICLES; PHYSICAL-CHEMISTRY; SULFURIC-ACID; WATER; N2O5; SPECTROSCOPY; CHLORIDE; SODIUM;

D O I：

10.1021/jz5008802

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

收藏

页码：2493 / 2500

页数：8

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