水凝网络的形成触发了大气气溶中的非典型的湿透性行为
Fengfeng Dong1, Qishen Huang1, Shufeng Pang1
1School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China.
The Science of the total environment
|November 2, 2024
概括
大气中的气溶由于水凝的形成而表现出不寻常的相变. 这种离子有机网络通过在水化和脱水周期期间改变气溶的行为来影响气候和空气质量.
科学领域:
- 大气化学 大气化学
- 物理化学 物理化学
- 环境科学 环境科学
背景情况:
- 气溶相位对于气候,人类健康和空气质量至关重要.
- 了解气溶相变是预测其大气影响的关键.
研究的目的:
- 研究内部混合的二酸 (SBT) 和硫酸 (AS) 气溶的相位行为.
- 描述在湿透周期中的非典型相位过渡.
主要方法:
- 显微镜成像技术的成像
- 混焦拉曼光谱法 混焦拉曼光谱法
- 红外光谱法 红外光谱法 红外光谱法
- 在AIOMFAC-VISC粘度预测中.
- 扫描电子显微镜 (SEM) 的使用
主要成果:
- 观察到脱水时的有限花朵 (LE) 和水化时的花朵 (EH).
- 在LE期间确定了Na2SO4固体,在EH期间确定了Na2SO4和 (NH4) 2SO4固体.
- 阶段过渡取决于大小,较小的水滴显示"EH",较大的水滴显示典型的花朵.
- 归因于LE和EH的离子有机水凝网络形成.
结论:
- 在SBT/AS气溶中形成凝网络导致非典型的相位过渡.
- pH值和有机/无机比率影响水凝网络的稳定性.
- 大气气溶中的非典型相变可以由凝网络形成驱动.
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