Intense dewatering from 1930 to 1996 at Monteponi caused the aquifer salinization, due to seawater contamination at depth. The cessation of pumping in 1997 caused flooding of the underground workings. The deep saline water mixed with the shallow groundwater, increasing salinity. At Campo Pisano the peak in salinity occurred in 1998. In 1999-2001, stratification caused the saline water at depth to settle in all mine sites. In 1997-1998, an increase in Zn, Cd, Fe and Mn concentrations occurred, especially at Campo Pisano. In 2004, after seven years of rebound, salinity and metal concentrations decreased significantly, but Pb concentrations are relatively high at many sites. Sampling at different depths in the Monteponi and Campo Pisano mines shows that the water quality deteriorates as depth increases, due to higher salinity and higher concentrations in Zn and Cd.

Evoluzione della qualità delle acque nelle miniere dell'Iglesiente

CIDU, ROSA
2005

Abstract

Intense dewatering from 1930 to 1996 at Monteponi caused the aquifer salinization, due to seawater contamination at depth. The cessation of pumping in 1997 caused flooding of the underground workings. The deep saline water mixed with the shallow groundwater, increasing salinity. At Campo Pisano the peak in salinity occurred in 1998. In 1999-2001, stratification caused the saline water at depth to settle in all mine sites. In 1997-1998, an increase in Zn, Cd, Fe and Mn concentrations occurred, especially at Campo Pisano. In 2004, after seven years of rebound, salinity and metal concentrations decreased significantly, but Pb concentrations are relatively high at many sites. Sampling at different depths in the Monteponi and Campo Pisano mines shows that the water quality deteriorates as depth increases, due to higher salinity and higher concentrations in Zn and Cd.
mine water; hydrogeochemistry; heavy metals
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/15320
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