Pore-waters and sediment cores were collected from the bed of the Baccatoio Stream, receiving the outflows of acid mine drainages in Alta Versilia (Italy). The data indicate that sediments are composed by different layers for mineralogy and elemental distribution; it is observed that the uppermost level is characterized by iron oxyhydroxides that act as efficient scavengers for arsenic. Porewaters invariably show higher concentration of potentially toxic elements with respect to the stream waters, in particular thallium. Observations indicate that this contaminated reservoir may be mobilized depending on the stream flow regime, yielding transient of contamination on the surface water.
The geochemistry of pore waters in riverbed sediments in a mining-impacted landscape: sources of potentially toxic elements
PEROTTI M.;GHEZZI L.;D’ORAZIO M.;GIANNECCHINI R.;PETRINI R.
2017-01-01
Abstract
Pore-waters and sediment cores were collected from the bed of the Baccatoio Stream, receiving the outflows of acid mine drainages in Alta Versilia (Italy). The data indicate that sediments are composed by different layers for mineralogy and elemental distribution; it is observed that the uppermost level is characterized by iron oxyhydroxides that act as efficient scavengers for arsenic. Porewaters invariably show higher concentration of potentially toxic elements with respect to the stream waters, in particular thallium. Observations indicate that this contaminated reservoir may be mobilized depending on the stream flow regime, yielding transient of contamination on the surface water.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
