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DOI | 10.5194/acp-19-14195-2019 |
Single-particle experiments measuring humidity and inorganic salt effects on gas-particle partitioning of butenedial | |
Birdsall, Adam W.1; Hensley, Jack C.2; Kotowitz, Paige S.3,5; Huisman, Andrew J.3,6; Keutsch, Frank N.1,2,4 | |
2019-11-26 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:22页码:14195-14209 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | An improved understanding of the fate and properties of atmospheric aerosol particles requires a detailed process-level understanding of fundamental factors influencing the aerosol, including partitioning of aerosol components between the gas and particle phases. Laboratory experiments with levitated particles provide a way to study fundamental aerosol processes over timescales relevant to the multiday lifetime of atmospheric aerosol particles, in a controlled environment in which various characteristics relevant to atmospheric aerosol can be prepared (e.g., high surface-to-volume ratio, highly concentrated or supersaturated solutions, changes to relative humidity). In this study, the four-carbon unsaturated compound butenedial, a dialdehyde produced by oxidation of aromatic compounds that undergoes hydration in the presence of water, was used as a model organic aerosol component to investigate different factors affecting gas-particle partitioning, including the role of lower-volatility "reservoir" species such as hydrates, timescales involved in equilibration between higher- and lower-volatility forms, and the effect of inorganic salts. The experimental approach was to use a laboratory system coupling particle levitation in an electrodynamic balance (EDB) with particle composition measurement via mass spectrometry (MS). In particular, by fitting measured evaporation rates to a kinetic model, the effective vapor pressure was determined for butenedial and compared under different experimental conditions, including as a function of ambient relative humidity and the presence of high concentrations of inorganic salts. Even under dry (RH < 5 %) conditions, the evaporation rate of butenedial is orders of magnitude lower than what would be expected if butenedial existed purely as a dialdehyde in the particle, implying an equilibrium strongly favoring hydrated forms and the strong preference of certain dialdehyde compounds to remain in a hydrated form even under lower water content conditions. Butenedial exhibits a salting-out effect in the presence of sodium chloride and sodium sulfate, in contrast to glyoxal. The outcomes of these experiments are also helpful in guiding the design of future EDB-MS experiments. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000499720400001 |
WOS关键词 | ORGANIC AEROSOL FORMATION ; VAPOR-PRESSURE ; THERMODYNAMIC MODEL ; REACTIVE UPTAKE ; GLYOXAL ; CHEMISTRY ; PRODUCTS ; SULFATE ; MASS ; PARAMETERIZATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/224080 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA; 2.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA; 3.Union Coll, Chem Dept, Schenectady, NY 12308 USA; 4.Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA; 5.NanoComposix, San Diego, CA USA; 6.Gentex Corp, Zeeland, MI USA |
推荐引用方式 GB/T 7714 | Birdsall, Adam W.,Hensley, Jack C.,Kotowitz, Paige S.,et al. Single-particle experiments measuring humidity and inorganic salt effects on gas-particle partitioning of butenedial[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(22):14195-14209. |
APA | Birdsall, Adam W.,Hensley, Jack C.,Kotowitz, Paige S.,Huisman, Andrew J.,&Keutsch, Frank N..(2019).Single-particle experiments measuring humidity and inorganic salt effects on gas-particle partitioning of butenedial.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(22),14195-14209. |
MLA | Birdsall, Adam W.,et al."Single-particle experiments measuring humidity and inorganic salt effects on gas-particle partitioning of butenedial".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.22(2019):14195-14209. |
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