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Influence of past mining on the quality of surface waters at Funtana Raminosa (Sardinia)
No full text
Inductively coupled plasma - mass spectrometry and - optical emission spectrometry determination of trace elements in water
No full textICP-MS and ICP-OES instrumental conditions were optimized for the determination of Li, Be, B, AI, V, Cr, Mn, Fe,
CO, Ni, Cu, Zn, As, Se, Rb, Sr, Ag, Cd, Sb, CS, Ba, Hg, TI, Pb, and Bi to achieve low detection limits (DLs) and good precision.
Routine ICP-MS and ICP-OES
DLs were in the 0.01-2.0 ug/L
and 0.7-25.0 ug/L range, respectively.
Precision was evaluated
at one sigma relative standard
deviation (RSD) for three replicate sets of analyses. Accuracy was evaluated by analysis of certified reference materials for
water (SRM 1643c and SLRS-3),
using the standard additions
method for natural waters having a different chemical composition and total dissolved solids up to
10 g/L. Precision and accuracy of most elements at concentrations above the ug/L level were <10%.
ICP-MS precision of <19% was
observed at concentrations of
0.03 ug/L, while sub-ug/L concentrations
for the elements considered
could not be determined
by ICP-OES
Evoluzione della qualità delle acque nelle miniere dell'Iglesiente
No full textIntense 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
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