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The Platinum Group Elements (PGEs), which include platinum (Pt), palladium (Pd), iridium (Ir), rhodium (Rh), osmium (Os) and ruthenium (Ru), are amongst the rarest trace elements in the Earth’s crust. They have similar physical and chemical properties, and tend to occur together in the same mineral deposits. Their properties are resistance to chemi...
Total concentrations and chemical forms of metals in surface sediments of the Vigo Ria (NW Iberian Peninsula) were determined following the sequential extraction method proposed by Tessier et at. (1979). Total values ranged from 7 to 14 mu gCo g(-1), 52 to 76 mu gCr g(-1), 18 to 82 mu gCu g(-1), 136 to 209 mu gMn g(-1), 18 to 30 mu gNi g(-1), 24 to...