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dc.contributor.authorMiñambres Durán, Lorena
dc.contributor.authorMéndez Alija, Estíbaliz
dc.contributor.authorSánchez Rayo, María Nieves
dc.contributor.authorCastaño Almendral, Fernando
dc.contributor.authorBasterrechea Elguezabal, Francisco José
dc.date.accessioned2016-03-17T15:07:57Z
dc.date.available2016-03-17T15:07:57Z
dc.date.issued2014
dc.identifier.citationAtmospheric Chemistry and Phisics 2014 : 11409-11425 (2014)es
dc.identifier.issn1680-7316
dc.identifier.issn1680-7324
dc.identifier.urihttp://hdl.handle.net/10810/17691
dc.description.abstractIn order to accurately assess the influence of fatty acids on the hygroscopic and other physicochemical properties of sea salt aerosols, hexanoic, octanoic or lauric acid together with sodium halide salts (NaCl, NaBr and NaI) have been chosen to be investigated in this study. The hygroscopic properties of sodium halide sub-micrometre particles covered with organic acids have been examined by Fourier-transform infrared spectroscopy in an aerosol flow cell. Covered particles were generated by flowing atomized sodium halide particles (either dry or aqueous) through a heated oven containing the gaseous acid. The obtained results indicate that gaseous organic acids easily nucleate onto dry and aqueous sodium halide particles. On the other hand, scanning electron microscopy (SEM) images indicate that lauric acid coating on NaCl particles makes them to aggregate in small clusters. The hygroscopic behaviour of covered sodium halide particles in deliquescence mode shows different features with the exchange of the halide ion, whereas the organic surfactant has little effect in NaBr particles, NaCl and NaI covered particles experience appreciable shifts in their deliquescence relative humidities, with different trends observed for each of the acids studied. In efflorescence mode, the overall effect of the organic covering is to retard the loss of water in the particles. It has been observed that the presence of gaseous water in heterogeneously nucleated particles tends to displace the cover of hexanoic acid to energetically stabilize the system.es
dc.description.sponsorshipThe authors are grateful to Ministerio de Ciencia e Innovacion (Madrid) for grant-in-aids (CGL2011-22441 and Consolider CSD-2007-00013), to Gobierno Vasco/Eusko Jaurlaritza (Vitoria-Gasteiz) for a Consolidated Research Group grant (IT520-10), and UPV/EHU for UFI11/23, SEM facilities (SGI/IZO-SGIker) and general support. L. Minambres thanks UPV/EHU for a postdoctoral research grant. We are grateful to Cristina Gutierrez from UPV/EHU for the use of the butanol CPC.es
dc.language.isoenges
dc.publisherCopernicus Gesellschaftes
dc.relationinfo:eu-repo/grantAgreement/MINECO/CGL2011-22441
dc.rightsinfo:eu-repo/semantics/openAccesses
dc.subjectsea spray aerosoles
dc.subjectmolecular-dynamics simulationses
dc.subjectammonium-sulfate particleses
dc.subjectmarine-boundary layeres
dc.subjectair-pollution sourceses
dc.subjectwater-uptakees
dc.subjectatmospheric particleses
dc.subjectsalt-solutionses
dc.subjectinfrared-spectroscopyes
dc.subjectrealative-humidityes
dc.titleThe effect of low solubility organic acids on the hygroscopicity of sodium halide aerosolses
dc.typeinfo:eu-repo/semantics/articlees
dc.rights.holder© Author(s) 2014. This work is distributed under the Creative Commons Attribution 3.0 License.es
dc.relation.publisherversionhttp://www.atmos-chem-phys.net/14/11409/2014/es
dc.identifier.doi10.5194/acp-14-11409-2014
dc.departamentoesQuímica físicaes_ES
dc.departamentoeuKimika fisikoaes_ES
dc.subject.categoriaMETEOROLOGY AND ATMOSPHERIC SCIENCES


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