0000000000647377

AUTHOR

E. Bagnato

showing 3 related works from this author

Mercury fluxes from volcanic and geothermal sources: an update

2014

We review the state of knowledge on global volcanogenic Hg emissions to the atmosphere and present new data from seven active volcanoes (Poás, Rincón de la Vieja, Turrialba, Aso, Mutnovsky, Gorely and Etna) and two geothermal fields (Las Pailas and Las Hornillas). The variability of Hg contents (c. 4–125 ng m−3) measured in gaseous emissions reflects the dynamic nature of volcanic plumes, where the abundances of volatiles are determined by the physical nature of degassing and variable air dilution. Based on our dataset and previous work, we propose that an average Hg/SO2 plume mass ratio of c. 7.8×10−6 (±1.5×10−6; 1 SE, n=13) is best representative of open-conduit quiescent degassing. Takin…

Mercury flux volcanoes budget geothermal areaSettore GEO/08 - Geochimica E Vulcanologia
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Mercury fluxes from volcanic and geothermal sources: An update

2015

OVSICORI, IAMC-CNR We review the state of knowledge on global volcanogenic Hg emissions to the atmosphere and present new data from seven active volcanoes (Poás, Rincón de la Vieja, Turrialba, Aso, Mutnovsky, Gorely and Etna) and two geothermal fields (Las Pailas and Las Hornillas). The variability of Hg contents (c. 4-125 ng m-3) measured in gaseous emissions reflects the dynamic nature of volcanic plumes, where the abundances of volatiles are determined by the physical nature of degassing and variable air dilution. Based on our dataset and previous work, we propose that an average Hg/SO2 plume mass ratio of c. 7.8 × 10-6 (± 1.5 × 10-6; 1 SE, n = 13) is best representative of open-conduit …

geographygeography.geographical_feature_categoryVOLCANOESGeochemistrychemistry.chemical_elementGeologyOcean EngineeringEMISIONESSO2ENERGÍA GEOTÉRMICAGEOTHERMAL ENERGYMercury (element)VolcanochemistryVOLCANESGeothermal gradientGeologyEMISSIONSWater Science and Technology
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Il Mercurio nel suolo e in ambiente terrestre

2015

Le interazioni del Hg con l'ambiente costituiscono il ciclo geochimico di questo elemento che si esplica per mezzo di complessi processi fisico-chimici differenti per ciascun comparto geochimico. Si stima che circa i due terzi del mercurio presente in ambiente sia stato prodotto durante il ventesimo secolo, e che il carico di mercurio immesso attualmente sia aumentato di circa 3 volte rispetto agli inizi del 1900 (Mason et al.. 1994). Il comparto ambientale certamente più coinvolto dalle emissioni di mercurio è quello atmosferico, da cui poi l’elemento si diffonde anche negli altri comparti, suolo e sedimenti compresi (Filzgerald & Clarkson, 1991). L’Atmosfera costituisce un importante …

Mercurio Augusta inquinamento biomonitoraggioSettore GEO/08 - Geochimica E Vulcanologia
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