Physical properties of short chain aqueous organosulfate aerosol.
Physical properties of short chain aqueous organosulfate aerosol.
复制标题
DOI：
10.1039/d3ea00088e
复制
发表时间：
2023-09-14
期刊：
影响因子：
--
通讯作者：
中科院分区：
文献类型：
--
作者：
有机硫酸盐占气溶胶有机成分的30%。有机硫酸盐气溶胶的物理性质，如水的活度、密度、折射率和表面张力，是预测它们对全球气候影响的关键。然而，目前对这些特性的理解是有限的。在这里，我们测量了含有甲基硫酸钠或乙基硫酸钠的水溶液的物理性质，并将数据作为溶质浓度的函数进行参数化。将实验数据与现有的文献数据进行比较，以确定有机硫酸盐以及盐(硫酸钠和硫酸氢钠)和有机物(短烷基链长醇和羧酸)的物理性质是否可以用具有类似官能度的分子来近似。除了水的活性外，我们发现有机硫酸盐的物理性质介于盐类和短烷基链有机物之间。这项工作突出了测量和开发大量大气有机硫酸盐物理性质模型的重要性，以便更好地描述气溶胶对气候的影响。短链有机硫酸盐气溶胶的大部分物理性质不能用盐或类似大小的有机物来近似。
Organosulfates comprise up to 30% of the organic fraction of aerosol. Organosulfate aerosol physical properties, such as water activity, density, refractive index, and surface tension, are key to predicting their impact on global climate. However, current understanding of these properties is limited. Here, we measure the physical properties of aqueous solutions containing sodium methyl or ethyl sulfate and parameterise the data as a function of solute concentration. The experimental data are compared to available literature data for organosulfates, as well as salts (sodium sulfate and sodium bisulfate) and organics (short alkyl chain length alcohols and carboxylic acids) to determine if the physical properties of organosulfates can be approximated by molecules of similar functionality. With the exception of water activity, we find that organosulfates have intermediate physical properties between those of the salts and short alkyl chain organics. This work highlights the importance of measuring and developing models for the physical properties of abundant atmospheric organosulfates in order to better describe aerosol's impact on climate. Most physical properties of short chain organosulfate aerosol cannot be approximated by salts or similar sized organics.
登录
查看更多内容
影响因子：
4.4
作者：
Hawkins, L. N.;Russell, L. M.;Bates, T. S.
通讯作者：
Bates, T. S.
影响因子：
8.4
作者：
Bzdek BR;Power RM;Simpson SH;Reid JP;Royall CP
通讯作者：
Royall CP
影响因子：
2.9
作者：
Cai, Chen;Stewart, David J.;Clegg, Simon L.
通讯作者：
Clegg, Simon L.
影响因子：
4.9
作者：
Bain, Alison;Preston, Thomas C.
通讯作者：
Preston, Thomas C.
影响因子：
11.4
作者：
Chan, MN;Choi, MY;Chan, CK
通讯作者：
Chan, CK