Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | First investigation of atmospheric mercury pollution around the chlor-alkali plant of Pieve Vergonte (Italian central Alps) |
| Abstract | In this study, the gaseous elemental mercury (Hg0) in air and its bioaccumulation in lichens were investigated in a case study located in the Ossola valley, close to the town of Pieve Vergonte (Italian central Alps), which is heavily polluted by chlor-alkali industrial activity operating since 1915. Atmospheric Hg0 was measured by means of a portable mercury analyzer (Lumex RA-915+) during car surveys and at fixed locations in autumn 2018 and winter 2019. Surveys covered an area of about 10 km2, including the chlor-alkali plant external area and the town of Pieve Vergonte. Results highlight Hg0 concentrations in air always above the typical terrestrial background concentration in the Northern Hemisphere (~1.5-1.7 ng m-3). Maximum values observed are two order of magnitude higher than the background levels and were always measured in the vicinity of the chlor- alkali plant. Samples of lichens were collected around the same area to evaluate the long-term dispersion pattern of atmospheric Hg. Total Hg concentrations in lichens were measured using an Automated Mercury Analyzer (AMA254, FKV, Italy). Results show a North-South gradient of Hg accumulation along the Ossola valley, where northerly winds prevail. Hg concentrations range from 0.143 mg kg-1 d.w. in lichens collected North of the chlor-alkali plant to 0.624 mg kg-1 d.w in lichens collected South of the chlor-alkali plant. |
| Source | Il tempo del pianeta Terra e il tempo dell'uomo: Le geoscienze fra passato e futuro, Parma, 17/09/2019, 19/09/2019 |
| Keywords | atmospheric mercury pollutionbioaccumulationlichens |
| Year | 2019 |
| Type | Abstract in atti di convegno |
| Authors | Fantozzi L.*1, Marziali L.2, Valsecchi L.2, Schiavon A.2, Orru? A.1 & Guerrieri N.1 |
| Text | 440129 2019 atmospheric mercury pollution bioaccumulation lichens First investigation of atmospheric mercury pollution around the chlor alkali plant of Pieve Vergonte Italian central Alps Fantozzi L. 1, Marziali L.2, Valsecchi L.2, Schiavon A.2, Orru A.1 Guerrieri N.1 1 IRSA CNR Verbania. 2 IRSA CNR Brugherio. Published version Il tempo del pianeta Terra e il tempo dell uomo Le geoscienze fra passato e futuro Parma 17/09/2019, 19/09/2019 Nazionale Contributo In this study, the gaseous elemental mercury Hg0 in air and its bioaccumulation in lichens were investigated in a case study located in the Ossola valley, close to the town of Pieve Vergonte Italian central Alps , which is heavily polluted by chlor alkali industrial activity operating since 1915. Atmospheric Hg0 was measured by means of a portable mercury analyzer Lumex RA 915 during car surveys and at fixed locations in autumn 2018 and winter 2019. Surveys covered an area of about 10 km2, including the chlor alkali plant external area and the town of Pieve Vergonte. Results highlight Hg0 concentrations in air always above the typical terrestrial background concentration in the Northern Hemisphere 1.5 1.7 ng m 3 . Maximum values observed are two order of magnitude higher than the background levels and were always measured in the vicinity of the chlor alkali plant. Samples of lichens were collected around the same area to evaluate the long term dispersion pattern of atmospheric Hg. Total Hg concentrations in lichens were measured using an Automated Mercury Analyzer AMA254, FKV, Italy . Results show a North South gradient of Hg accumulation along the Ossola valley, where northerly winds prevail. Hg concentrations range from 0.143 mg kg 1 d.w. in lichens collected North of the chlor alkali plant to 0.624 mg kg 1 d.w in lichens collected South of the chlor alkali plant. Abstract in atti di convegno lucia.valsecchi VALSECCHI LUCIA nicoletta.guerrieri GUERRIERI NICOLETTA laura.fantozzi FANTOZZI LAURA laura.marziali MARZIALI LAURA arianna.orru ORRU ARIANNA |