DOI: 10.1002/jgrd.50186
论文题名: Effect of soluble surfactant on bubble persistence and bubble-produced aerosol particles
作者: Modini R.L. ; Russell L.M. ; Deane G.B. ; Stokes M.D.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 3 起始页码: 1388
结束页码: 1400
语种: 英语
英文关键词: bubble drainage
; bubbles
; film thickness
; Sea spray aerosols
; sea spray source function
; surfactant
Scopus关键词: Bubbles (in fluids)
; Film thickness
; Surface active agents
; Video recording
; Aerosol production
; Fundamental properties
; High speed videography
; Sea spray aerosols
; Soluble surfactants
; Source functions
; Surfactant concentrations
; Surfactant-stabilized
; Aerosols
; aerosol
; bubble
; concentration (composition)
; particle size
; persistence
; salt water
; surfactant
英文摘要: The effect of soluble surfactant on the persistence of salt-water bubbles and their ability to produce aerosol particles upon bursting was investigated. Ensembles of individual, millimetric bubbles were produced in NaCl solutions of varying surfactant concentration. Aerosol production efficiency - a fundamental property of single bubbles defined as the number of particles produced per bubble film cap area - decreased by 79% to 98% following the addition of surfactant and increase in solution film pressure from 1-2 to 7-27 mN m -1. The generated particle size distributions (0.01-10 μm dry diameter) contained up to three modes and did not change much for film pressures up to 13.8 mN m-1. The persistence of the bubbles at the water surface and the thickness of their film caps were investigated with high-speed videography. Addition of soluble surfactant increased average bubble persistence providing more time for the bubbles to drain and thin out with the aid of marginal regeneration flows. Bubble film cap thicknesses ranged from around 1 μm for relatively clean, short-lived bubbles to less than 0.1 μm for surfactant-stabilized, persistent bubbles. The suppression of aerosol production from the surfactant-stabilized bubbles may have resulted from the dramatic thinning of their caps or reduced surface forces at high film pressure. Previously reported Sea Spray Aerosol source functions were compared to measured aerosol production efficiencies and found to be significantly greater in magnitude, suggesting that there is a source of particles from whitecaps that was not captured in these single-bubble experiments. ©2013. American Geophysical Union. All Rights Reserved. 资助项目: OCE-1129580
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63934
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Scripps Institution of Oceanography, University of California San Diego, Mail Code 0221, 9500 Gilman Drive, San Diego, CA 92093-0221, United States; École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland
Recommended Citation:
Modini R.L.,Russell L.M.,Deane G.B.,et al. Effect of soluble surfactant on bubble persistence and bubble-produced aerosol particles[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(3)