Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10418
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dc.contributor.authorallDi Martino, R. M. R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.authorallCamarda, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.authorallGurrieri, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.authorallValenza, M.; Università Degli Studi di Palermoen
dc.date.accessioned2016-12-22T10:39:18Zen
dc.date.available2016-12-22T10:39:18Zen
dc.date.issued2015en
dc.identifier.urihttp://hdl.handle.net/2122/10418en
dc.description.abstractThe thorough understanding of the gas transport in porous media is of considerable interest in several environmental issues, such as the transport of contaminants, nutrient substances or moisture, and to applications in subsurface repository of nuclear wastes. In volcanology, the gas transport process affects the compositions of both the soils and the fumaroles gases, that are the proxy of the magmatic activity. Herein we study the transients of the chemical composition of the soil and fumaroles gases through the formulation of a theoretical model, and the gas flux experiments carried out in the laboratory. The theoretical model accounts for the gas releases in volcanic areas, and investigates the effects of the gas flux processes, the transport parameters in the soils, and the depth of the gas reservoir on the composition of the gas emissions. The model takes into account the process of the mass transfer triggered by the changes of the flux parameters in the system, and describes the time-dependent evolution of the composition of the soil gases as the result of the pristine gas mixture, the diffusivity of the chemicals, and the thickness of the medium. The approximate solution of the flux problem provides the retention time of the ith component of the gas mixture in the porous medium as function of the thickness of the soil, the advective flux rate, and the diffusivity of the chemicals. Carbon dioxide (CO2), hydrogen (H2), and helium (He) were used in a laboratory-scaled flux simulator with the purpose of investigating the evolution of the composition profile in a porous medium of constant thickness. The comparison of the theoretical computations with the experimental results provides the evaluation of the compositional range of validity of the model. Furthermore, the results of this study indicate that the measurement of both the delays between the transients in the concentration of different components, and the gas flux provides an evaluation of the depth of the gas reservoir, because of the retention time in the porous medium is a diffusivitydependent property, and also depends from the depth of the gas sourceen
dc.language.isoEnglishen
dc.relation.ispartofEGU General Assemblyen
dc.subjectCO2en
dc.subjectH2en
dc.titleA theoretical model and the experimental results for the concentration transients of CO2, H2, and He in the volcanic gasesen
dc.typePoster sessionen
dc.description.statusPublisheden
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistryen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.01. Gasesen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoringen
dc.description.ConferenceLocationViennaen
dc.description.obiettivoSpecifico2V. Dinamiche di unrest e scenari pre-eruttivien
dc.description.obiettivoSpecifico5V. Sorveglianza vulcanica ed emergenzeen
dc.description.fulltextopenen
dc.contributor.authorDi Martino, R. M. R.en
dc.contributor.authorCamarda, M.en
dc.contributor.authorGurrieri, S.en
dc.contributor.authorValenza, M.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.departmentUniversità Degli Studi di Palermoen
item.openairetypePoster session-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia-
crisitem.author.orcid0000-0001-6435-2759-
crisitem.author.orcid0000-0003-1527-7910-
crisitem.author.orcid0000-0003-4085-0440-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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