DOI: 10.1016/j.atmosenv.2013.11.073
Scopus记录号: 2-s2.0-84891051277
论文题名: Raman diagnostic of the reactivity between ZnSO4 and CaCO3 particles in humid air relevant to heterogeneous zinc chemistry in atmosphere
作者: Falgayrac G ; , Sobanska S ; , Brémard C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 85 起始页码: 83
结束页码: 91
语种: 英语
英文关键词: Humidity
; Mineral dust
; Raman imaging
; Zn4SO4(OH)6
; Zn5(CO3)2(OH)6
; ZnSO4 hydrates
Scopus关键词: Aerosol particles
; Chemical phenomenas
; Experimental conditions
; Humid atmospheres
; Laboratory experiments
; Mineral dust
; Raman imaging
; Water condensation
; Atmospheric chemistry
; Atmospheric humidity
; Biochemistry
; Calcium carbonate
; Condensation
; Deposition
; Drops
; Dust
; Hydrates
; Surface reactions
; Zinc
; Agglomeration
; calcium carbonate
; goslarite
; unclassified drug
; water
; zinc sulfate
; atmospheric chemistry
; bioavailability
; calcium carbonate
; condensation
; dissolution
; gypsum
; humid environment
; precipitation (chemistry)
; Raman spectroscopy
; solubility
; troposphere
; zinc
; air
; article
; atmosphere
; bioavailability
; chemical composition
; chemical phenomena
; chemical reaction
; crystal
; dissolution
; equilibrium constant
; humid air
; humidity
; microscopy
; mineral dust
; particle size
; precipitation
; priority journal
; raman microspectrometry
; Raman spectrometry
; scanning electron microscope
; solubility
; surface property
; troposphere
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: Laboratory experiments using Raman imaging demonstrated the behaviour of ZnSO4·7H2O (goslarite) microparticles in contact with a {101-4} CaCO3 (calcite) surface under three different experimental conditions representative of remote atmosphere. Contact between the ZnSO4·7H2O particles and the CaCO3 surface in humid air (RH ~40-80%) did not induce any deliquescence and chemical phenomena. In contrast, condensation of a water drop at the ZnSO4·7H2O-CaCO3 interface caused free dissolution of the ZnSO4·7H2O particle and rapid precipitation of Zn4SO4(OH)6 onto the CaCO3 surface. This coating inhibited the surface reaction and subsequent drying resulted in the deposition of residual ZnSO4·7H2O, then ZnSO4·H2O (gunningite) and CaSO4·2H2O (gypsum) superimposed onto the Zn4SO4(OH)6 layer. The deposition of ZnSO4·7H2O particles in a water drop, previously in contact with a CaCO3 particle for a long time, resulted in the coprecipitation of Zn4SO4(OH)6 and Zn5(CO3)2(OH)6 (hydrozincite). Subsequent drying caused the deposition of residual ZnSO4·7H2O, ZnSO4·H2O and CaSO4·2H2O as small particles. These results indicated the possible fates of ZnSO4 particles in a humid atmosphere, when externally mixed with CaCO3 mineral dust after atmospheric events such as aggregation, water condensation and evaporation. This study indicated the fundamental role of water that typically existed on the surface of aerosol particles in the troposphere. These heterogeneous chemical processes have substantial consequences on particle size and solubility, and thus on bioavailability and toxicity of metal-rich particles. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80767
Appears in Collections: 气候变化事实与影响
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作者单位: Laboratoire de Spectrochimie IR et Raman, UMR-CNRS 8516, Bât. C5 Université de Lille I, F-59655 Villeneuve d'Ascq Cedex, France; UDSL, Physiopathologie des Maladies Osseuses et Inflammatoires EA4490, IMPRT-IFR114, F-59000 Lille, France
Recommended Citation:
Falgayrac G,, Sobanska S,, Brémard C. Raman diagnostic of the reactivity between ZnSO4 and CaCO3 particles in humid air relevant to heterogeneous zinc chemistry in atmosphere[J]. Atmospheric Environment,2014-01-01,85