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Coastal areas receive significant amounts of nutrients (nitrogen, phosphorus, silicon) mostly from land-based sources, which contribute to increased biological productivity often exceeding that naturally found in coastal and marine environments. Most coastal zones of southern Europe are naturally oligotrophic with relatively small freshwater discharges. Studies of circulation and mixing processes...
Inorganic arsenic and phosphate distributions have been studied in the acidic mixing zone of the Tinto river in November 1996, June 1997, and April 1998. This mixing zone receives high inputs of As, PO 3-4 and Fe in relation with acid mine drainage and run-off from phosphogypsum waste. In the early stage of mixing the dissolution of detritic Fe phases (pyrite and oxides) releases...
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