dc.contributor.author | Miñambres Durán, Lorena | |
dc.contributor.author | Méndez Alija, Estíbaliz | |
dc.contributor.author | Sánchez Rayo, María Nieves | |
dc.contributor.author | Castaño Almendral, Fernando | |
dc.contributor.author | Basterrechea Elguezabal, Francisco José | |
dc.date.accessioned | 2016-03-17T15:07:57Z | |
dc.date.available | 2016-03-17T15:07:57Z | |
dc.date.issued | 2014 | |
dc.identifier.citation | Atmospheric Chemistry and Phisics 2014 : 11409-11425 (2014) | es |
dc.identifier.issn | 1680-7316 | |
dc.identifier.issn | 1680-7324 | |
dc.identifier.uri | http://hdl.handle.net/10810/17691 | |
dc.description.abstract | In 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.sponsorship | The 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.iso | eng | es |
dc.publisher | Copernicus Gesellschaft | es |
dc.relation | info:eu-repo/grantAgreement/MINECO/CGL2011-22441 | |
dc.rights | info:eu-repo/semantics/openAccess | es |
dc.subject | sea spray aerosol | es |
dc.subject | molecular-dynamics simulations | es |
dc.subject | ammonium-sulfate particles | es |
dc.subject | marine-boundary layer | es |
dc.subject | air-pollution sources | es |
dc.subject | water-uptake | es |
dc.subject | atmospheric particles | es |
dc.subject | salt-solutions | es |
dc.subject | infrared-spectroscopy | es |
dc.subject | realative-humidity | es |
dc.title | The effect of low solubility organic acids on the hygroscopicity of sodium halide aerosols | es |
dc.type | info:eu-repo/semantics/article | es |
dc.rights.holder | © Author(s) 2014. This work is distributed
under the Creative Commons Attribution 3.0 License. | es |
dc.relation.publisherversion | http://www.atmos-chem-phys.net/14/11409/2014/ | es |
dc.identifier.doi | 10.5194/acp-14-11409-2014 | |
dc.departamentoes | Química física | es_ES |
dc.departamentoeu | Kimika fisikoa | es_ES |
dc.subject.categoria | METEOROLOGY AND ATMOSPHERIC SCIENCES | |