Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8150
DC FieldValueLanguage
dc.contributor.authorallTassi, F.; unifien
dc.contributor.authorallCapecchiacci, F.; unifien
dc.contributor.authorallCabassi, J.; unifien
dc.contributor.authorallCalabrese, S.; unipaen
dc.contributor.authorallVaselli, O.; UNIFIen
dc.contributor.authorallRouwet, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.authorallPecoraino, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.authorallChiodini, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italiaen
dc.date.accessioned2012-10-11T06:58:12Zen
dc.date.available2012-10-11T06:58:12Zen
dc.date.issued2012en
dc.identifier.urihttp://hdl.handle.net/2122/8150en
dc.description.abstractIn this paper, fluid source(s) and processes controlling the chemical composition of VOCs (Volatile Organic Compounds) in gas discharges from Mt. Etna and Vulcano Island (Sicily, Italy) were investigated. The main composition of the Etnean and Volcano gas emissions is produced by mixing, to various degrees, of “magmatic” and “hydrothermal” components. VOCs are dominated by alkanes, alkenes and aromatics, with minor, though significant, concentrations of O-, S- and Cl(F)-substituted compounds. The main mechanism for the production of alkanes is likely related to pyrolysis of organic matter-bearing sediments that interact with the ascending magmatic fluids. Alkanes are then converted to alkene and aromatic compounds via catalytic reactions (dehydrogenation and dehydroaromatization, respectively). Nevertheless, an abiogenic origin for the light hydrocarbons cannot be ruled out. Oxidative processes of hydrocarbons at relatively high temperatures and oxidizing conditions, typical of these volcanic-hydrothermal fluids, may explain the production of alcohols, esters, aldehydes, as well as O- and S-bearing heterocycles. By comparing the concentrations of hydrochlorofluorocarbons (HCFCs) in the fumarolic discharges with respect to those of background air, it is possible to highlight that they have a geogenic origin likely due to halogenation of both methane and alkenes. Finally, CFC (chlorofluorocarbon) abundances appear to be consistent with background air, although the strong air contamination that affects the Mt. Etna fumaroles may mask a possible geogenic contribution for these compounds. On the other hand, no CFCs were detected in the Vulcano gases, which are characterized by low air contribution. Nevertheless, a geogenic source for these compounds cannot be excluded on the basis of the present data.en
dc.language.isoengen
dc.publisher.nameAmerican Geophysical Unionen
dc.relation.ispartofJournal of geophysical research - atmospheresen
dc.relation.ispartofseries/117 (2012)en
dc.subjectetna, vulcano, VOCen
dc.titleGeogenic and atmospheric sources for volatile organic compounds in fumarolic emissions from Mt. Etna and Vulcano Island (Sicily, Italy)en
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumberD17305en
dc.subject.INGV03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gasesen
dc.identifier.doi10.1029/2012JD017642en
dc.description.obiettivoSpecifico1.2. TTC - Sorveglianza geochimica delle aree vulcaniche attiveen
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.relation.issn0148-0227en
dc.contributor.authorTassi, F.en
dc.contributor.authorCapecchiacci, F.en
dc.contributor.authorCabassi, J.en
dc.contributor.authorCalabrese, S.en
dc.contributor.authorVaselli, O.en
dc.contributor.authorRouwet, D.en
dc.contributor.authorPecoraino, G.en
dc.contributor.authorChiodini, G.en
dc.contributor.departmentunifien
dc.contributor.departmentunifien
dc.contributor.departmentunifien
dc.contributor.departmentunipaen
dc.contributor.departmentUNIFIen
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 OV, Napoli, Italiaen
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.openairetypearticle-
item.languageiso639-1en-
item.fulltextWith Fulltext-
item.grantfulltextopen-
crisitem.author.deptUniversità di Firenze, Dip. Scienze della Terra, Italy-
crisitem.author.deptunifi-
crisitem.author.deptDipartimento C.F.T.A., Palermo University, Palermo/Italy-
crisitem.author.deptEarth Science Dept., University of Florence, Via La Pira 4, Florence, 50121, Italy; (3) CNR - IGG, Via La Pira 4, Florence, 50121, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.orcid0000-0002-3319-4257-
crisitem.author.orcid0000-0001-5478-1912-
crisitem.author.orcid0000-0002-0628-8055-
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.parent03. Hydrosphere-
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