1,720,962 research outputs found
Heavy metals chronological and areal trends of shelf marine sediments in Central Tyrrhenian Sea (Tuscany-Italy)
No full textPoster presentato al 13th Annual V.M. Goldschmidt Conference - Copenhagen (Denmark), 5-11 giugno 200
Heavy Metals in the submerged Ombrone River delta (Central Tyrrhenian Sea-Italy)
No full textCongresso Geoitalia a cura della Federazione Italiana di Scienze della Terra - Rimini 12 - 14 settembre 200
Poster: Heavy metals chronological and areal trends of shelf marine sediments in Central Tyrrhenian Sea (Tuscany- Italy)
No full textHolocene and present-day heavy metals in Central Tyrrhenian Sea sediments
No full textPresentato al 33rd International Geological Congress - Oslo - 6-14 Agosto 200
Poster: Inquinamento atmosferico a Roma: un modello basato sull'analisi del Radiocarbonio e di parametri funzionali e chimici in foglie di specie sempreverdi
No full textImplementazione del Marine Reservoir Correction Database lungo le coste italiane.
No full textConvegno Nazionale per le Scienze del Mare "Quali Mari Italiani?" organizzato dal CoNISMa - Lecce, 4/8 Novembre 2008
Inquinamento atmosferico a Roma: un modello basato sull'analisi del radiocarbonio e di parametri funzionali e chimici in foglie di specie sempreverdi
No full textRadiocarbon as a biomarker of urban pollution in leaves of evergreen species sampled in Rome and in rural areas (Lazio-Central Italy)
No full textThe aim of the present study is the use of 14C, sampled in leaves of evergreen species, as a natural geochemical marker to estimate the contribution of artificial sources (heating plants, vehicles, etc.) to the complex of atmospheric gases in an urban environment. Leaves were chosen due to sampling easiness and their reliability: in particular the evergreen species, being exposed all the year round to pollutants are especially indicated for bioindication and biomonitoring studies. The response to atmospheric pollutants has been studied of two plant species (Quercus ilex L., Pinus pinea L.) measuring isotopic (14r, δ13C), chemical (Pb concentration) and ecophysiological (gaseous exchange and leaf fluorescence of chlorophyll a) parameters. Leaves of holm-oaks and stone pine needles collected over a 3-year time span in an urban park in Rome (Villa Ada) and in reference localities outside the city on the Tyrrhenian coast and in the pre-Appennine area have been analysed. In Villa Ada measurements were carried out along a transect from the road bordering the park towards the interior; all the parameters, together in agreement, showed a decreasing pollution gradient towards the inner park. It was possible to estimate a 5.5±0.3% contribution of CO2 from fossil fuels close to the road, decreasing to 1.7±0.3% at <300 m from it towards the inner park. The isotopic analyses conducted on stone pines and holm-oaks show that 14C provides indications on the degree of pollution from fossil fuels, while δ13C appears to be conditioned mainly by the interspecific difference, and also by many other environmental factors that affect the plant functionality. Results confirmed that radiocarbon is a useful tool in environmental studies, allowing to quantify the contributions of CO2 of anthropic origin: this parameter, together with appropriate isotopic, chemical and ecophysiological analyses, could provide a good indication of the “air quality” in urban and rural contexts
Carbon isotopes in detecting urban pollution in Rome
No full textPoster. 12th Annual V.M. Golschmidt Conference, Davos, Switzerlan
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