Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10325
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dc.contributor.authorallVenturi, S.; Università di Firenze, Dip. Scienze della Terra, Italyen
dc.contributor.authorallCabassi, J.; Università di Firenze, Dip. Scienze della Terra, Italyen
dc.contributor.authorallTassi, F.; Università di Firenze, Dip. Scienze della Terra, Italyen
dc.contributor.authorallCapecchiacci, F.; Università di Firenze, Dip. Scienze della Terra, Italyen
dc.contributor.authorallVaselli, O.; Università di Firenze, Dip. Scienze della Terra, Italyen
dc.contributor.authorallBellomo, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.authorallCalabrese, S.; Università di Palermo, DiSTeM, Italyen
dc.contributor.authorallD'Alessandro, W.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.date.accessioned2016-07-19T12:30:09Zen
dc.date.available2016-07-19T12:30:09Zen
dc.date.issued2016-09en
dc.identifier.urihttp://hdl.handle.net/2122/10325en
dc.description.abstractIn this study, hydrogen sulfide (H2S) measurements in air carried out using (a) passive/diffusive samplers (Radiello® traps) and (b) a high-frequency (60 s) real-time analyzer (Thermo® 450i) were compared in order to evaluate advantages and limitations of the two techniques. Four different sites in urban environments (Florence, Italy) and two volcanic areas characterized by intense degassing of H2S-rich fluids (Campi Flegrei and Vulcano Island, Italy) were selected for such measurements. The concentrations of H2S generally varied over 5 orders of magnitude (from 10 1e103 mg/m3), the H2S values measured with the Radiello® traps (H2SR) being significantly higher than the average values measured by the Thermo® 450i during the trap exposure (H2STa), especially when H2S was <30 mg/m3. To test the reproducibility of the Radiello® traps, 8 passive/diffusive samplers were contemporaneously deployed within an 0.2 m2 area in an H2S-contaminated site at Mt. Amiata (Tuscany, Italy), revealing that the precision of the H2SR values was ±49%. This large uncertainty, whose cause was not recognizable, is to be added to that related to the environmental conditions (wind speed and direction, humidity, temperature), which are known to strongly affect passive measurements. The Thermo® 450i analyzer measurements highlighted the occurrence of short-term temporal variations of the H2S concentrations, with peak values (up to 5732 mg/m3) potentially harmful to the human health. The Radiello® traps were not able to detect such temporal variability due to their large exposure time. The disagreement between the H2SR and H2STa values poses severe concerns for the selection of an appropriate methodological approach aimed to provide an accurate measurement of this highly toxic air pollutant in compliance with the WHO air quality guidelines. Although passive samplers may offer the opportunity to carry out low-cost preliminary surveys, the use of the high-frequency H2S analyzer is preferred when an accurate assessment of air quality is required. In fact, the latter provides precise real-time measurements for a reliable estimation of the effective exposure to hazardous H2S concentrations, giving insights into the mechanisms regulating the dispersion of this air pollutant in relation to the meteorological parameters.en
dc.language.isoEnglishen
dc.publisher.nameElsevier Science Limiteden
dc.relation.ispartofApplied geochemistryen
dc.relation.ispartofseries/72 (2016)en
dc.subjectactive analysersen
dc.subjectPassive/diffusive samplersen
dc.subjectGaseous contaminantsen
dc.subjectAir quality monitoringen
dc.subjectHydrogen sulphideen
dc.titleHydrogen sulfide measurements in air by passive/diffusive samplers and high-frequency analyzer: A critical comparisonen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber51-58en
dc.identifier.URLhttp://www.sciencedirect.com/science/article/pii/S0883292716301202en
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.03. Pollutionen
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.07. Volcanic effectsen
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.08. Instruments and techniquesen
dc.identifier.doi10.1016/j.apgeochem.2016.07.001en
dc.description.obiettivoSpecifico4V. Vulcani e ambienteen
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.relation.issn0883-2927en
dc.relation.eissn1872-9134en
dc.contributor.authorVenturi, S.en
dc.contributor.authorCabassi, J.en
dc.contributor.authorTassi, F.en
dc.contributor.authorCapecchiacci, F.en
dc.contributor.authorVaselli, O.en
dc.contributor.authorBellomo, S.en
dc.contributor.authorCalabrese, S.en
dc.contributor.authorD'Alessandro, W.en
dc.contributor.departmentUniversità di Firenze, Dip. Scienze della Terra, Italyen
dc.contributor.departmentUniversità di Firenze, Dip. Scienze della Terra, Italyen
dc.contributor.departmentUniversità di Firenze, Dip. Scienze della Terra, Italyen
dc.contributor.departmentUniversità di Firenze, Dip. Scienze della Terra, Italyen
dc.contributor.departmentUniversità di Firenze, Dip. Scienze della Terra, Italyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.departmentUniversità di Palermo, DiSTeM, Italyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptUniversità di Firenze, Dip. Scienze della Terra, Italy-
crisitem.author.deptunifi-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia-
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 Palermo, Palermo, Italia-
crisitem.author.deptDipartimento C.F.T.A., Palermo University, Palermo/Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia-
crisitem.author.orcid0000-0001-7778-8498-
crisitem.author.orcid0000-0002-3319-4257-
crisitem.author.orcid0000-0002-3058-1489-
crisitem.author.orcid0000-0003-0249-6663-
crisitem.author.orcid0000-0003-1724-0388-
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.parent01. Atmosphere-
crisitem.classification.parent01. Atmosphere-
crisitem.classification.parent01. Atmosphere-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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