Crystallization kinetics of sea-salt aerosols studied by high-speed photography

Zheng Gang Qian; Feng Wang; Yu Xia Zheng; Jun Ying Yu; Yun Hong Zhang

doi:10.1007/s11434-011-4907-z

Crystallization kinetics of sea-salt aerosols studied by high-speed photography

Zheng Gang Qian, Feng Wang, Yu Xia Zheng, Jun Ying Yu, Yun Hong Zhang

School of Chemistry and Chemical Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Morphological changes with decreasing relative humidity (RH) of supersaturated sea-salt aerosol droplets on a quartz substrate were observed using a high-speed video-camera. Stable gypsum (CaSO ₄·2H ₂O) or the metastable hemihydrate (CaSO ₄·0.5H ₂O) were precipitated as the RH decreased. The dynamic process of crystal growth under steady-state humidity was studied by controlling the RH; the metastable hemihydrate was precipitated at 70.5%-77.1% RH, and the apparent crystal growth rate was between 1.42 and 2.33 μm ³/s. Stable gypsum was formed at 80.7%-82.2% RH, and the apparent crystal growth rate was between 0.70 and 0.81 μm ³/s.

Original language	English
Pages (from-to)	591-594
Number of pages	4
Journal	Chinese Science Bulletin
Volume	57
Issue number	6
DOIs	https://doi.org/10.1007/s11434-011-4907-z
Publication status	Published - Feb 2012

Keywords

crystallization dynamics
high-speed photography
sea-salt aerosols

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10.1007/s11434-011-4907-z

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title = "Crystallization kinetics of sea-salt aerosols studied by high-speed photography",

abstract = "Morphological changes with decreasing relative humidity (RH) of supersaturated sea-salt aerosol droplets on a quartz substrate were observed using a high-speed video-camera. Stable gypsum (CaSO 4·2H 2O) or the metastable hemihydrate (CaSO 4·0.5H 2O) were precipitated as the RH decreased. The dynamic process of crystal growth under steady-state humidity was studied by controlling the RH; the metastable hemihydrate was precipitated at 70.5%-77.1% RH, and the apparent crystal growth rate was between 1.42 and 2.33 μm 3/s. Stable gypsum was formed at 80.7%-82.2% RH, and the apparent crystal growth rate was between 0.70 and 0.81 μm 3/s.",

keywords = "crystallization dynamics, high-speed photography, sea-salt aerosols",

author = "Qian, {Zheng Gang} and Feng Wang and Zheng, {Yu Xia} and Yu, {Jun Ying} and Zhang, {Yun Hong}",

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T1 - Crystallization kinetics of sea-salt aerosols studied by high-speed photography

AU - Qian, Zheng Gang

AU - Wang, Feng

AU - Zheng, Yu Xia

AU - Yu, Jun Ying

AU - Zhang, Yun Hong

PY - 2012/2

Y1 - 2012/2

N2 - Morphological changes with decreasing relative humidity (RH) of supersaturated sea-salt aerosol droplets on a quartz substrate were observed using a high-speed video-camera. Stable gypsum (CaSO 4·2H 2O) or the metastable hemihydrate (CaSO 4·0.5H 2O) were precipitated as the RH decreased. The dynamic process of crystal growth under steady-state humidity was studied by controlling the RH; the metastable hemihydrate was precipitated at 70.5%-77.1% RH, and the apparent crystal growth rate was between 1.42 and 2.33 μm 3/s. Stable gypsum was formed at 80.7%-82.2% RH, and the apparent crystal growth rate was between 0.70 and 0.81 μm 3/s.

AB - Morphological changes with decreasing relative humidity (RH) of supersaturated sea-salt aerosol droplets on a quartz substrate were observed using a high-speed video-camera. Stable gypsum (CaSO 4·2H 2O) or the metastable hemihydrate (CaSO 4·0.5H 2O) were precipitated as the RH decreased. The dynamic process of crystal growth under steady-state humidity was studied by controlling the RH; the metastable hemihydrate was precipitated at 70.5%-77.1% RH, and the apparent crystal growth rate was between 1.42 and 2.33 μm 3/s. Stable gypsum was formed at 80.7%-82.2% RH, and the apparent crystal growth rate was between 0.70 and 0.81 μm 3/s.

KW - crystallization dynamics

KW - high-speed photography

KW - sea-salt aerosols

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U2 - 10.1007/s11434-011-4907-z

DO - 10.1007/s11434-011-4907-z

M3 - Article

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SN - 1001-6538

VL - 57

SP - 591

EP - 594

JO - Chinese Science Bulletin

JF - Chinese Science Bulletin

IS - 6

ER -

Crystallization kinetics of sea-salt aerosols studied by high-speed photography

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Keywords

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