Arsenic contamination in the Baccu Locci mine watershed (Sardinia, Italy) after remediation

The old Pb-AsBaccu Locci mine represents the first and only case of mine site remediation in Sardinia, Italy. This paper reports preliminary results on the level of contamination in the Baccu Locci stream after remediation. In particular, distribution of dissolved As has not substantially changed compared to pre-remediation situation, showing an increasing trend along the stream and a concentration of about 400 µg/L at a distance of 5 km from the mine. Future monitoring of the Baccu Locci system will provide fundamental information on the effectiveness of remediation measures adopted and their applicability to other mine sites in Sardinia.