122 research outputs found
Tenori del piombo disciolto e rapporti isotopici 206Pb/207Pb nelle acque piovane della Sardegna
Preliminary results on the occurrence of rare earth elements in the water system of the Pialassa Baiona, Ravenna
The Site of Community Importance of the Pineta S. Vitale, bordered by the
Pialassa Baiona lagoon system, is submitted to increasing deterioration due to a subsiding phenomenon, groundwater salinization and contamination from the
industrial sites of Ravenna. Within a multidisciplinary research project, evaluation
of the background level of Rare Earth Elements (REE, not regulated at present, but
potentially harmful to human health) and the characterization of processes which
control their migration and retention were performed to contribute to the
knowledge on the present environmental quality of the Ravenna area.
Concentrations of total and dissolved elements were determined in 40 water
samples comprising surface waters, soil waters, shallow and deep groundwater.
Dissolved major and minor components generally showed increasing
concentrations from West to East (i.e. towards the sea) and appeared mostly
derived from a marine source. Marked correlations between dissolved ΣREE and
Al and Fe concentrations in the filtered fraction <0.4 μm were observed, especially
in the soil waters. Shale-normalized patterns of the dissolved REE in the soil
waters showed an enrichment in the Middle REE (MREE); such patterns being
attributed to preferential adsorption of the MREE onto colloidal particles (<0.4
μm)
Metalli in tracce nelle piogge della Sardegna meridionale (Al, Si, Fe, Co, Ba, Rb, Mn, Sr, V, Ni, Zn, Cu, Cd, Pb)
Studi geochimici e mineralogici sulle frazioni solubile e indisciolta delle piogge della Sardegna
Composizione chimica e qualità delle acque campionate nel Foglio 549 Muravera. Risultati preliminari
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