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Platinum-Group Elements in Cosmochemistry
Elements, 2008In a cooling solar nebula, five of the six platinum-group elements (PGE) condense as refractory-metal alloys at temperatures above the condensation of Fe-Ni metal. Non-refractory Pd condenses in solid solution with Fe-Ni. Such refractory alloys are preserved in some meteorites, although they are often highly altered.
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Platinum Group Elements in the Environment: Emissions and Exposure
2008PGEs (Pt, Pd, Ru, Ir, and Os) are a relatively new group of anthropogenic pollutants. Specific useful properties of these metals (high resistance to chemical corrosion over a wide range of temperatures, high melting point, high mechanical resistance, and high plasticity) have fomented rapid growth of new and existing applications in various economic ...
Aleksandra, Dubiella-Jackowska +2 more
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1993
Platinum group elements are ruthenium, rhodium and palladium (of similar weight as, but lighter than silver, the next element in the periodic table by atomic number) and osmium, iridium and platinum (of similar weight as, but lighter than gold, the next element in the periodic table by atomic number). As opposed to gold and silver, known probably since
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Platinum group elements are ruthenium, rhodium and palladium (of similar weight as, but lighter than silver, the next element in the periodic table by atomic number) and osmium, iridium and platinum (of similar weight as, but lighter than gold, the next element in the periodic table by atomic number). As opposed to gold and silver, known probably since
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Ore Deposits of the Platinum-Group Elements
Elements, 2008The formation of ore deposits of the platinum-group elements (PGE) requires that their concentrations be raised about four orders of magnitude above typical continental crustal abundances. Such extreme enrichment relies principally on the extraction capacity of sulfide liquid, which sequesters the PGE from silicate magmas.
J. E. Mungall, A. J. Naldrett
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Quantitative bioimaging of platinum group elements in tumor spheroids
Analytica Chimica Acta, 2016Limited drug penetration into tumor tissue is a significant factor to the effectiveness of cancer therapy. Tumor spheroids, a 3D cell culture model system, can be used to study drug penetration for pharmaceutical development. In this study, a method for quantitative bioimaging of platinum group elements by laser ablation (LA) coupled to inductively ...
Ann-Christin, Niehoff +13 more
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Sources of Platinum Group Elements in the Environment
2014Platinum group elements (PGE, i.e. Pt, Pd, Rh, Ir, Ru, Os) are among the least abundant elements in the Earth’s continental crust. PGE concentrations in urban and roadside environments are, however, increasing as a result of anthropogenic emissions.
Sebastien Rauch +1 more
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Adsorption Kinetics of Platinum Group Elements in River Water
Environmental Science & Technology, 2006The uptake of platinum group elements (PGE) by different preparations of estuarine sediment suspended in filtered river water has been examined. For a given PGE, adsorption time courses to untreated sediment and to sediment whose hydrous metal oxides or organic matter had been removed by appropriate chemical treatments were similar.
Andrew, Turner +4 more
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Fractionation of the Platinum-Group Elements During Mantle Melting
Science, 2004Experiments in sulfide-silicate systems demonstrate that two sulfide phases are stable in the asthenospheric upper mantle: a crystalline osmium-iridiumruthenium–enriched monosulfide and a rhodium-platinum-palladium–enriched sulfide melt. During silicate melt segregation, monosulfide stays in the solid residue, dominating the noble metal spectrum of ...
Conny, Bockrath +2 more
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Anthropospheric Losses of Platinum Group Elements
2013The platinum group elements are among the rarest elements in the Earth’s crust yet each plays an important role in modern society. Despite their technological importance, little has been published on how much is lost during their extraction, processing, use and recycling. This chapter provides estimates of global losses of Pt, Pd, Rh, Ru and Ir at each
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Geochemistry of platinum group elements in the ocean
ГеохимияThe review considers the current state of research on the geochemistry of platinum group elements (PGEs) in the ocean. The behavior of PGE in the aquatic environment is determined by their degree of oxidation, the ability to change it, and complexation. The difference in chemical properties of PGEs leads to the fact that in the ocean they do not retain
E. D. Berezhnaya, A. V. Dubinin
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