| DOI: | 10.1016/j.atmosenv.2013.10.011
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| Scopus记录号: | 2-s2.0-84886248327
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| 论文题名: | Deliquescence and efflorescence behavior of individual NaCl and KCl mixture aerosol particles |
| 作者: | Li X; , Gupta D; , Eom H; -J; , Kim H; , Ro C; -U
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| 刊名: | Atmospheric Environment
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| ISSN: | 0168-2563
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| EISSN: | 1573-515X
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| 出版年: | 2014
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| 卷: | 82 | | 起始页码: | 36
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| 结束页码: | 43
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| 语种: | 英语
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| 英文关键词: | DRH
; ERH
; Hygroscopic properties of multi-component aerosols
; NaCl-KCl
; Optical microscopy
; SEM/EDX
; Single particle analysis
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| Scopus关键词: | DRH
; ERH
; Multicomponents
; NaCl-KCl
; SEM/EDX
; Single-particle analysis
; Aerosols
; Dehydration
; Drying
; Mixing
; Mixtures
; Optical microscopy
; Phase diagrams
; Surface chemistry
; Efflorescence
; potassium chloride
; sodium chloride
; aerosol property
; chloride
; dehydration
; hygroscopicity
; mixing ratio
; particle size
; aerosol
; article
; dehydration
; gas mixing
; humidifier
; humidity
; ionic strength
; phase transition
; priority journal
; solid
; solubility
|
| Scopus学科分类: | Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
|
| 英文摘要: | The hygroscopic behavior of laboratory-generated, micrometer sized NaCl and KCl mixture aerosol particles in nine mixing ratios (mole fractions of KCl (XKCl)=0.1-0.9) was investigated systematically to observe their deliquescence and efflorescence behavior, obtain experimental phase diagrams for their deliquescence and efflorescence, and understand the efflorescence mechanism. Aerosol particles with a eutonic composition of XKCl=0.3 showed only one phase transition during the humidifying process at the mutual deliquescence relative humidity (MDRH) of 72.3(±0.5)%, whereas the aerosol particles with other mixing ratios showed two distinct deliquescence transitions. First, the eutonic component dissolved at the MDRH and second, the remainder in the solid phase dissolved completely at various DRHs, resulting in a phase diagram composed of four different phases. During the dehydration process, droplets at all mixing ratios showed a single transition at their efflorescence RHs (ERHs), resulting in a phase diagram composed of two different phases. The minimum ERH of 43.7-43.2% was observed for XKCl=0.4. This suggests that short-range ionic interactions and the common-ion effect may substantially affect the mutual solubility of NaCl and KCl at high ionic-strengths, and hence the supersaturation of the salts. Elemental X-ray mapping of the effloresced NaCl-KCl mixture particles at all mixing ratios suggests that more supersaturated salt nucleated homogeneously to crystallize in the center, and the other salt underwent the heterogeneous crystallization on the former. © 2013 Elsevier Ltd. |
| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/80948
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Department of Chemistry, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, South Korea
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| Recommended Citation: | |
Li X,, Gupta D,, Eom H,et al. Deliquescence and efflorescence behavior of individual NaCl and KCl mixture aerosol particles[J]. Atmospheric Environment,2014-01-01,82
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