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Il Nuovo dizionario della lingua italiana di Francesco Cerruti fra tradizione e innovazione, in Storia della lingua italiana e storia dell’Italia unita. L’italiano e lo stato nazionale, a cura di A. Nesi, S. Morgana, N. Maraschio, Firenze: Cesati, 2011, pp. 201-213. ISBN: 978-88-7667-424-2. Scritto assieme ad A. Pelo con esatta divisione delle parti.
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RUOLO DEL MASCELLARE NELLE ASIMMETRIE FACCIALI CONSEGUENTI AD ANCHILOSI MONOLATERALI PROCOCI DELL'A.T.M.
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Geochemical behavior of rare earth elements in waters from the Pineta S. Vitale (Ravenna, Italy)
No full textThe Pineta S. Vitale is located in a lagoon system near the Adriatic Sea (Italy). This area is affected by subsidence, groundwater salinization and industrial contamination. Amultidisciplinary research project was performed to evaluate the aqueous rare earth elements (REE), and to characterize the processes controlling their migration. Concentrations of total and dissolved elements were determined in 40 water samples (surface waters, soil waters, groundwater). Dissolved major and minor components generally show increasing concentrations from west to east towards the Adriatic Sea, and appear mostly derived from a marine source. Concentrations of REEvary from <0.1 to 190 μg/L, the highest values occur in soil waters. Correlations between ΣREEand Al-Fe concentrations in the <0.4 μm filtered fraction have been observed. Shale-normalized patterns of REEin the soil waters show an enrichment in the middle REE(MREE), likely due to preferential adsorption of the MREEonto <0.4 μm particles
From acid-rock drainage to acid-mine drainage: extreme contamination in waters at the Furtei Au-mine (Sardinia, Italy)
No full textThe weathering of sulfide-bearing mineral deposits, exposed either by natural erosion or by mining to
oxygen and water, can produce natural acid-rock drainage (ARD) and mining-related acid-rock drainage (acid
mine drainage, AMD), respectively. The composition and extent of acid drainage is highly variable, depending
on many factors, such as the composition of ore bodies and related host rocks, climate, mining operations and
processing (Nordstrom and Alpers, 1999). Due to the low pH and high concentrations of contaminants, acid
drainages can severely degradate surface and groundwater systems, as well as soils.
At Furtei (Sardinia, Italy), a high-sulfidation epithermal gold deposit consists of pyrite and enargite with
minor amounts of luzonite, tennantite, and chalcocite. The oxidized cap mainly consists of iron oxy-hydroxides,
gypsum, jarosite, halotrichite and scorodite. The gold deposit was exploited by open pit from 1997 to 2003.
The Au and Ag were recovered from oxidized ores by cyanidation. Sulfide ores were processed by flotation to
recover Cu concentrates. Total production was about 4 t of Au, 6 t of Ag, and 1500 t of Cu (Cidu et al., 2013).
Pre-mining conditions showed waters (flow <0.1 L/s) with pH down to 2.3, a typical example of ARD
characterized by high salinity (26 g/L) with predominant sulfate (20 g/L) and very high amounts of dissolved
contaminants (in mg/L): Al 2000, Fe 1700, Mn 35, Cu 29, Zn 11, Ni 4, Co 3, Cr 1, As 0.4, and Cd 0.1 (Cidu
et al., 1997).
During exploitation and after the mine closure, the number of sites with contaminated water increased.
Contaminated waters showed pH and chemical compositions similar to those observed under pre-mining
conditions, but much higher concentrations of Cu, Zn, As and Cd, respectively up to 180, 97, 5, and 1.7 mg/L
(Da Pelo et al., 2009; Cidu et al., 2013). The seepage from the tailings impoundment is collected in a well
and back pumped into impoundment. The highly contaminated water in the open pits and drainages from the
pyrite-rich waste dumps may flow downstream from the mine under heavy rain periods and pose a hazard to
agricultural areas
DIAGNOSI E PROGRAMMAZIONE TERAPEUTICA DELLE DISMORFIE DELLA SINFISI MNTONIERA IN PAZIENTI AFFETTI DA MALFORMAZIONI DENTO-SCHELETRICHE
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