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Sea salt deliquescence and crystallization in atmosphere: an in situ investigation using x-ray phase contrast imaging
Zeng, Jianrong; Zhang, Guilin; Long, Shilei; Liu, Ke; Cao, Lingling; Bao, Liangman; Li, Yan
2013
Source PublicationSURFACE AND INTERFACE ANALYSIS
ISSN0142-2421
Volume45Issue:5Pages:CONCATENATE(Sheet1!I292,-Sheet1!J292)
AbstractX-ray phase contrast imaging (PCI) based on synchrotron radiation was introduced for the first time as an in situ imaging way to investigate sea salt phase change, i.e. deliquescence and crystallization in atmospheric environment. A performance on the deliquescence of pure NaCl, which is the dominant component in sea salt, demonstrated that this technique can directly observe the change of core particle and differentiate the outer water layer clearly in solid-aqueous system of similar to 100 mu m scale. The imaging results showed that sea salt particle deliquesced on a large scale of relative humidity (RH) between 34 and 97% RH as a solid-liquid drop, while no clear deliquescence RH was observed during the process. According to the drop size growth curve, sea salt deliquescence can be divided into three steps, namely water accumulating step (34-75% RH), bulk melting step (75-86% RH) and delay dissolving step (>86% RH), which are most probably dominated by grouped components as MgCl2/CaCl2/MgSO4, NaCl and Na2SO4/KCl/K2SO4, respectively. Instead at a sole RH, the crystallization of sea salt solution occurred at a range of 46-58% RH, which well agreed with the theory proposed by Ge et al. The aqueous-solid condition provided by sea salt deliquescence and crystallization may greatly enhance the heterogeneous chemical reactions in atmosphere. Copyright (C) 2012 John Wiley & Sons, Ltd.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000319051700008
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13894
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Zeng, Jianrong,Zhang, Guilin,Long, Shilei,et al. Sea salt deliquescence and crystallization in atmosphere: an in situ investigation using x-ray phase contrast imaging[J]. SURFACE AND INTERFACE ANALYSIS,2013,45(5):CONCATENATE(Sheet1!I292,-Sheet1!J292).
APA Zeng, Jianrong.,Zhang, Guilin.,Long, Shilei.,Liu, Ke.,Cao, Lingling.,...&Li, Yan.(2013).Sea salt deliquescence and crystallization in atmosphere: an in situ investigation using x-ray phase contrast imaging.SURFACE AND INTERFACE ANALYSIS,45(5),CONCATENATE(Sheet1!I292,-Sheet1!J292).
MLA Zeng, Jianrong,et al."Sea salt deliquescence and crystallization in atmosphere: an in situ investigation using x-ray phase contrast imaging".SURFACE AND INTERFACE ANALYSIS 45.5(2013):CONCATENATE(Sheet1!I292,-Sheet1!J292).
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