Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-5583-2017 |
Influence of organic compound functionality on aerosol hygroscopicity: dicarboxylic acids, alkyl-substituents, sugars and amino acids | |
Marsh, Aleksandra1; Miles, Rachael E. H.1; Rovelli, Grazia1; Cowling, Alexander G.1; Nandy, Lucy2; Dutcher, Cari S.2; Reid, Jonathan P.1 | |
2017-05-03 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA |
英文摘要 | Hygroscopicity data for 36 organic compounds, including amino acids, organic acids, alcohols and sugars, are determined using a comparative kinetics electrodynamic balance (CK-EDB). The CK-EDB applies an electric field to trap-charged aqueous droplets in a chamber with controlled temperature and relative humidity (RH). The dual micro dispenser set-up allows for sequential trapping of probe and sample droplets for accurate determination of droplet water activities from 0.45 to > 0.99. Here, we validate and benchmark the CK-EDB for the homologous series of straight-chain dicarboxylic acids (oxalic-pimelic) with measurements in better agreement with Universal Quasichemical Functional Group Activity Coefficients (UNIFAC) predictions than the original data used to parametrise UNIFAC. Furthermore, a series of increasingly complex organic compounds, with subtle changes to molecular structure and branching, are used to rigorously assess the accuracy of predictions by UNIFAC, which does not explicitly account for molecular structure. We show that the changes in hygroscopicity that result from increased branching and chain length are poorly represented by UNIFAC, with UNIFAC underpredicting hygroscopicity. Similarly, amino acid hygroscopicity is under-predicted by UNIFAC predictions, a consequence of the original data used in the parametrisation of the molecular subgroups. New hygroscopicity data are also reported for a selection of alcohols and sugars and they show variable levels of agreement with predictions. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000400578700003 |
WOS关键词 | CLOUD CONDENSATION NUCLEI ; WATER TRANSPORT KINETICS ; THERMODYNAMIC MODEL ; ACTIVITY-COEFFICIENTS ; REFRACTIVE-INDEX ; CHEMISTRY ; PARAMETER ; DENSITY ; GROWTH ; PH |
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/28413 |
专题 | 地球科学 |
作者单位 | 1.Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England; 2.Univ Minnesota, Dept Mech Engn, 111 Church St SE, Minneapolis, MN 55455 USA |
推荐引用方式 GB/T 7714 | Marsh, Aleksandra,Miles, Rachael E. H.,Rovelli, Grazia,et al. Influence of organic compound functionality on aerosol hygroscopicity: dicarboxylic acids, alkyl-substituents, sugars and amino acids[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(9). |
APA | Marsh, Aleksandra.,Miles, Rachael E. H..,Rovelli, Grazia.,Cowling, Alexander G..,Nandy, Lucy.,...&Reid, Jonathan P..(2017).Influence of organic compound functionality on aerosol hygroscopicity: dicarboxylic acids, alkyl-substituents, sugars and amino acids.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(9). |
MLA | Marsh, Aleksandra,et al."Influence of organic compound functionality on aerosol hygroscopicity: dicarboxylic acids, alkyl-substituents, sugars and amino acids".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.9(2017). |
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