Evaporation of sulfate aerosols at low relative humidity

被引：12

作者：

Tsagkogeorgas, Georgios ^{[1
]}

Roldin, Pontus ^{[2
,3
]}

Duplissy, Jonathan ^{[2
,4
]}

Rondo, Linda ^{[5
]}

Troestl, Jasmin ^{[6
]}

Slowik, Jay G. ^{[6
]}

Ehrhart, Sebastian ^{[5
,12
]}

Franchin, Alessandro ^{[2
]}

Kuerten, Andreas ^{[5
]}

Amorim, Antonio ^{[7
,8
]}

Bianchi, Federico ^{[2
]}

Kirkby, Jasper ^{[5
,9
]}

Petaja, Tuukka ^{[2
]}

Baltensperger, Urs ^{[6
]}

Boy, Michael ^{[2
]}

Curtius, Joachim ^{[5
]}

Flagan, Richard C. ^{[10
]}

Kulmala, Markku ^{[2
,4
]}

Donahue, Neil M. ^{[11
]}

Stratmann, Frank ^{[1
]}

机构：

[1] Leibniz Inst Tropospher Res, D-04318 Leipzig, Germany

[2] Univ Helsinki, Dept Phys, POB 64, FIN-00014 Helsinki, Finland

[3] Lund Univ, Div Nucl Phys, POB 118, S-22100 Lund, Sweden

[4] Univ Helsinki, Helsinki Inst Phys, POB 64, FIN-00014 Helsinki, Finland

[5] Goethe Univ Frankfurt, Inst Atmospher & Environm Sci, D-60438 Frankfurt, Germany

[6] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[7] Univ Lisbon, Fac Ciencias, P-1749016 Lisbon, Portugal

[8] Univ Lisbon, CENTRA, P-1749016 Lisbon, Portugal

[9] CERN, CH-1211 Geneva, Switzerland

[10] CALTECH, Pasadena, CA 91125 USA

[11] Carnegie Mellon Univ, Ctr Atmospher Particle Studies, Pittsburgh, PA 15213 USA

[12] Max Planck Inst Chem, Atmospher Chem Dept, D-55128 Mainz, Germany

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2017年 / 17卷 / 14期

基金：

美国国家科学基金会; 瑞典研究理事会; 奥地利科学基金会; 俄罗斯基础研究基金会; 瑞士国家科学基金会; 芬兰科学院;

关键词：

AQUEOUS SULFURIC-ACID; IN-SITU OBSERVATIONS; PARTICLE FORMATION; THERMODYNAMIC MODEL; STRATOSPHERIC CONDITIONS; ELECTROLYTE SYSTEMS; MASS-SPECTROMETER; VAPOR-PRESSURE; HETEROMOLECULAR NUCLEATION; ACTIVITY-COEFFICIENTS;

D O I：

10.5194/acp-17-8923-2017

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Evaporation of sulfuric acid from particles can be important in the atmospheres of Earth and Venus. However, the equilibrium constant for the dissociation of H2SO4 to bisulfate ions, which is the one of the fundamental parameters controlling the evaporation of sulfur particles, is not well constrained. In this study we explore the volatility of sulfate particles at very low relative humidity. We measured the evaporation of sulfur particles versus temperature and relative humidity in the CLOUD chamber at CERN. We modelled the observed sulfur particle shrinkage with the ADCHAM model. Based on our model results, we conclude that the sulfur particle shrinkage is mainly governed by H2SO4 and potentially to some extent by SO3 evaporation. We found that the equilibrium constants for the dissociation of H2SO4 to HSO4-(KH2SO4) and the dehydration of H2SO4 to SO3 ((x) K-SO3) are K H2SO4 = 2-4 x 10(9) mol kg(-1) and (x) K SO3 >= 1.4 x 10(10) at 288.8 +/- 5 K.

引用

页码：8923 / 8938

页数：16

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