Metal Enrichment Factors in Holocene Sediments in the Tinto River Estuary (SW Spain)

摘要

Metal concentration in sediments samples from two vibracores in the Tinto river estuary it has beendetermined. The enrichment factors (EF) of metal associated to sulphide deposits (Fe, Cu, Zn, Pb and As),in most cases, is over 2. Cu, Zn and As have much higher EF, over 10 in surficial samples. The progressiveshallowness of the estuary has undergone a relative increase in acidic river water volume with respect toseawater. This effect has originated a downstream displacement of acid mixing processes affecting theestuary, which is reflected in higher metal concentration in sediments of the outer zones of the system