High temporal and spatial resolution measurements of the rapid efflorescence of sea salt droplets

Hai Jie Tong; Zheng Gang Qian; P. Reid Jonathan; Yun Hong Zhang

High temporal and spatial resolution measurements of the rapid efflorescence of sea salt droplets

Hai Jie Tong, Zheng Gang Qian, P. Reid Jonathan, Yun Hong Zhang

Research output: Journal article publication › Journal article › Academic research › peer-review

Abstract

The rapid efflorescence of individual seawater droplets on polytetrafluoroethylene (PTFE, hydrophobic) and quartz (hydrophilic) substrates was investigated using a high-speed camera for imaging and micro-Raman spectroscopy to spatially resolve the particle composition. The morphology of the evaporating sea salt particles was captured using millisecond time resolution and micrometer spatial resolution. Upon rapid desiccation with dry N₂ on a quartz substrate, Na₂Ca₅(SO₄)₆· 3H₂O and Na_2xCa_6-x(SO₄)₆· 3H₂O (0<x<1) crystallized first followed by NaCl and finally KMgCl₃ · 6H₂O. We determined the formation behavior of the mixed sodium-calcium salts as crystallization products during the quick desiccation process and CaSO₄ · 2H₂O during the slow desiccation process. In addition, the crystallization location of different crystal products were identified and the growth speed of Na₂Ca₅(SO₄)₆· 3H₂O crystal was compared with that of CaSO₄ · 2H₂O crystal. Moreover, sea salt particles with a hollow structure were observed on the PTFE substrate at the end of the quick efflorescence process.

Original language	English
Pages (from-to)	2521-2527
Number of pages	7
Journal	Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica
Volume	27
Issue number	11
Publication status	Published - 2011
Externally published	Yes

Keywords

Efflorescence
High-speed photography
Raman spectroscopy
Relative humidity
Sea salt

ASJC Scopus subject areas

Physical and Theoretical Chemistry

Cite this

@article{4bfdeca4612f4c39ab6542acb72e8c6d,

title = "High temporal and spatial resolution measurements of the rapid efflorescence of sea salt droplets",

abstract = "The rapid efflorescence of individual seawater droplets on polytetrafluoroethylene (PTFE, hydrophobic) and quartz (hydrophilic) substrates was investigated using a high-speed camera for imaging and micro-Raman spectroscopy to spatially resolve the particle composition. The morphology of the evaporating sea salt particles was captured using millisecond time resolution and micrometer spatial resolution. Upon rapid desiccation with dry N2 on a quartz substrate, Na2Ca5(SO4)6· 3H2O and Na2xCa6-x(SO4)6· 3H2O (03 · 6H2O. We determined the formation behavior of the mixed sodium-calcium salts as crystallization products during the quick desiccation process and CaSO4 · 2H2O during the slow desiccation process. In addition, the crystallization location of different crystal products were identified and the growth speed of Na2Ca5(SO4)6· 3H2O crystal was compared with that of CaSO4 · 2H2O crystal. Moreover, sea salt particles with a hollow structure were observed on the PTFE substrate at the end of the quick efflorescence process.",

keywords = "Efflorescence, High-speed photography, Raman spectroscopy, Relative humidity, Sea salt",

author = "Tong, {Hai Jie} and Qian, {Zheng Gang} and {Reid Jonathan}, P. and Zhang, {Yun Hong}",

year = "2011",

language = "English",

volume = "27",

pages = "2521--2527",

journal = "Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica",

issn = "1000-6818",

publisher = "Beijing University Press",

number = "11",

}

TY - JOUR

T1 - High temporal and spatial resolution measurements of the rapid efflorescence of sea salt droplets

AU - Tong, Hai Jie

AU - Qian, Zheng Gang

AU - Reid Jonathan, P.

AU - Zhang, Yun Hong

PY - 2011

Y1 - 2011

N2 - The rapid efflorescence of individual seawater droplets on polytetrafluoroethylene (PTFE, hydrophobic) and quartz (hydrophilic) substrates was investigated using a high-speed camera for imaging and micro-Raman spectroscopy to spatially resolve the particle composition. The morphology of the evaporating sea salt particles was captured using millisecond time resolution and micrometer spatial resolution. Upon rapid desiccation with dry N2 on a quartz substrate, Na2Ca5(SO4)6· 3H2O and Na2xCa6-x(SO4)6· 3H2O (03 · 6H2O. We determined the formation behavior of the mixed sodium-calcium salts as crystallization products during the quick desiccation process and CaSO4 · 2H2O during the slow desiccation process. In addition, the crystallization location of different crystal products were identified and the growth speed of Na2Ca5(SO4)6· 3H2O crystal was compared with that of CaSO4 · 2H2O crystal. Moreover, sea salt particles with a hollow structure were observed on the PTFE substrate at the end of the quick efflorescence process.

AB - The rapid efflorescence of individual seawater droplets on polytetrafluoroethylene (PTFE, hydrophobic) and quartz (hydrophilic) substrates was investigated using a high-speed camera for imaging and micro-Raman spectroscopy to spatially resolve the particle composition. The morphology of the evaporating sea salt particles was captured using millisecond time resolution and micrometer spatial resolution. Upon rapid desiccation with dry N2 on a quartz substrate, Na2Ca5(SO4)6· 3H2O and Na2xCa6-x(SO4)6· 3H2O (03 · 6H2O. We determined the formation behavior of the mixed sodium-calcium salts as crystallization products during the quick desiccation process and CaSO4 · 2H2O during the slow desiccation process. In addition, the crystallization location of different crystal products were identified and the growth speed of Na2Ca5(SO4)6· 3H2O crystal was compared with that of CaSO4 · 2H2O crystal. Moreover, sea salt particles with a hollow structure were observed on the PTFE substrate at the end of the quick efflorescence process.

KW - Efflorescence

KW - High-speed photography

KW - Raman spectroscopy

KW - Relative humidity

KW - Sea salt

UR - http://www.scopus.com/inward/record.url?scp=82155187030&partnerID=8YFLogxK

M3 - Journal article

AN - SCOPUS:82155187030

SN - 1000-6818

VL - 27

SP - 2521

EP - 2527

JO - Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica

JF - Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica

IS - 11

ER -

High temporal and spatial resolution measurements of the rapid efflorescence of sea salt droplets

Abstract

Keywords

ASJC Scopus subject areas

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