Impact of past mining activity on the quality of ground water in SW Sardinia (Italy)

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doi: 10.1016/j.gexplo.2008.02.003
Authors:Cidu, Rosa; Biddau, Riccardo; Fanfani, Luca
Author Affiliations:Primary:
Universita di Cagliari, Dipartimento di Scienze della Terra, Cagliari, Italy
Volume Title:Abandoned and active mining sites; from contamination to remediation
Volume Authors:Cidu, Rosa, editor; Frau, Franco
Source:Journal of Geochemical Exploration, 100(2-3), p.125-132; Water in mining environments, IMWA symposium, Cagliari, Italy, May 27-31, 2007, edited by Rosa Cidu and Franco Frau. Publisher: Elsevier, Amsterdam-New York, International. ISSN: 0375-6742
Publication Date:2009
Note:In English. Based on Publisher-supplied data
Summary:Hydrogeochemical surveys were carried out in SW Sardinia (Italy) to investigate the impact of past mining activities on the quality of groundwater. The chemistry of waters from flooded galleries, adits and dumps has been compared with that of springs and wells in the same area at sites relatively far from any mine legacy. A feature, common to all waters, is the circumneutral pH, since the carbonate formations in the area neutralise the acidity produced by the oxidation of Fe-bearing sulphide minerals in the mine impacted water. However, groundwater interacting with mine workings is degraded in quality; it shows high dissolved SO4, Zn, Cd and Pb contents. In some cases groundwater exceeds the limit established by the guidelines of the World Health Organization for Pb content in drinking water, so that groundwater is mixed before entering the local aqueducts. Results from this study suggest that more attention needs to be paid to the impact on the streams from contaminated water flowing out from some mine areas because during the dry season these streams are only fed by mine groundwater. We recommend focusing efforts to reduce the chemical contamination prior to discharge. Abstract Copyright (2009) Elsevier, B.V.
Subjects:Abandoned mines; Acid mine drainage; Chemical composition; Drinking water; Environmental effects; Geochemistry; Ground water; Hydrochemistry; Metals; Mines; Oxidation; PH; Pollutants; Pollution; Sulfides; Water pollution; Water quality; Europe; Italy; Sardinia Italy; Southern Europe; Southwestern Sardinia Italy
Coordinates:N385000 N403000 E0094500 E0090000
Record ID:2009089594
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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