THE S DOMINGOS MINE - A STUDY OF HEAVY-METAL CONTAMINATION IN THE WATER COLUMN AND SEDIMENTS OF THE CHANCA RIVER BASIN BY DISCHARGE FROM ANANCIENT CUPRIFEROUS PYRITE MINE (PORTUGAL)
Eg. Pereira et al., THE S DOMINGOS MINE - A STUDY OF HEAVY-METAL CONTAMINATION IN THE WATER COLUMN AND SEDIMENTS OF THE CHANCA RIVER BASIN BY DISCHARGE FROM ANANCIENT CUPRIFEROUS PYRITE MINE (PORTUGAL), Marine and freshwater research, 46(1), 1995, pp. 145-151
The water column and the sediment in the S. Domingos Mine area and the
associated drainage stream are heavily contaminated by heavy metals.
The Chanca Reservoir, into which this stream flows, shows a localized
area where the sediment is contaminated by heavy metals, but in genera
l the water column does not show any contamination. Both water column
and sediment quality were analysed, including determination of total h
eavy metal concentration as well as acid volatile sulfide (AVS) and si
multaneously extracted metal (SEM). The ratio between SEM and AVS is l
ess then 1 for almost all sampling sites, showing that the Chanca Rese
rvoir appears to be protected in most areas with respect to both sedim
ent and water column toxity.