State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resources Utilization and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
Department of Chemical and Biomolecular Engineering, A. James Clark School of Engineering, University of Maryland, College Park, MD 20742, USA.
Sci Total Environ. 2022 Jul 15;830:154767. doi: 10.1016/j.scitotenv.2022.154767. Epub 2022 Mar 26.
Hydroxyalkylsulfonates may contribute significantly to atmospheric particles; however, their hygroscopic properties and cloud condensation nuclei (CCN) activities remain unknown. In this study, three complementary techniques were utilized to examine the hygroscopicity of sodium hydroxymethanesulfonate (NaHMS), sodium 2-hydroxyethylsulfonate (NaHES), and ammonium 2-hydroxyethylsulfonate (NHHES) under subsaturated and supersaturated environments. The mass changes in the three hydroxyalkylsulfonates at different relative humidities at 25 °C were examined by a vapor sorption analyzer, and the mass growth factors were measured to be 3.25 ± 0.01 for NaHMS, 3.32 ± 0.02 for NaHES, and 3.34 ± 0.04 for NHHES at 90% RH. Their hygroscopic growth was investigated by a humidity tandem differential mobility analyzer, and hygroscopic growth factors were 1.78 ± 0.02 for NaHMS, 1.71 ± 0.02 for NaHES, and 1.68 ± 0.03 for NHHES at 90% RH. Furthermore, the CCN activities of NaHMS, NaHES, and NHHES were explored, and their single hygroscopicity parameters (κ) were measured to be 0.649 ± 0.097 for NaHMS, 0.559 ± 0.069 for NaHES, and 0.434 ± 0.073 for NHHES. In addition, the hygroscopic growth and CCN activities of binary mixtures of ammonium sulfate with one of the three hydroxyalkylsulfonates were also examined.
羟烷基磺酸盐可能对大气颗粒物有重要贡献，但它们的吸湿性和云凝结核（CCN）活性仍不清楚。在这项研究中，采用三种互补技术研究了在亚饱和和过饱和环境下，羟甲基甲磺酸钠（NaHMS）、羟乙基磺酸钠（NaHES）和羟乙基磺基铵（NHHES）的吸湿性。在 25°C 下，通过蒸汽吸附分析仪研究了三种羟烷基磺酸盐在不同相对湿度下的质量变化，测量得到的质量增长因子分别为 90% RH 时的 3.25 ± 0.01（NaHMS）、3.32 ± 0.02（NaHES）和 3.34 ± 0.04（NHHES）。通过湿度串联差分迁移率分析仪研究了它们的吸湿增长，吸湿增长因子分别为 90% RH 时的 1.78 ± 0.02（NaHMS）、1.71 ± 0.02（NaHES）和 1.68 ± 0.03（NHHES）。此外，还研究了 NaHMS、NaHES 和 NHHES 的 CCN 活性，测量得到它们的单参数吸湿系数（κ）分别为 0.649 ± 0.097（NaHMS）、0.559 ± 0.069（NaHES）和 0.434 ± 0.073（NHHES）。此外，还研究了硫酸铵与三种羟烷基磺酸盐中的一种的二元混合物的吸湿增长和 CCN 活性。
