Geochemical behavior of Pt and Pd in coastal marine sediments,southeastern margin of the Japan Sea |
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| Institution: | 1. Department of Environmental Science, SRM University- AP, Amaravati, Andhra Pradesh 522 240;2. CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur 440 020, Maharashtra, India;3. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, Uttar Pradesh, India;1. Université de Bordeaux, UMR CNRS 5805 EPOC, 33615 Pessac cedex, France;2. CBET, PIE-UPV/EHU, 48080 Plentzia, Spain;3. Instituto de Investigacións Mariñas (IIM-CSIC), Vigo, Galicia, Spain |
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| Abstract: | Eighty-one argillaceous marine sediments collected from the southeastern coastal margin of the Japan Sea were analyzed for Pt and Pd by atomic absorption spectrometry using a graphite furnace atomizer after solvent extraction separation. The average Pt (1.2 ± 0.5 ppb) and Pd(1.6 ± 0.9 ppb) contents are generally similar to those of the published crustal abundances. The Pt or Pd is generally enriched in the fine sediment fraction, and positively correlated with Cu, Pb and water depth. The inverse correlation between the Pt or Pd content and redox potential of the sediment suggests that significant amounts of Pt and Pd are supplied in their dissolved forms, and reduced to their metallic states. It is concluded that the Pt and Pd distributions in the coastal marine sediments are controlled by the geological characteristics of the studied area, grain size and redox potential of sediments, water depths, and dissolved O2 concentration of sea water. |
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