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Showing 1 to 20 of 143 for “"platinum group"”.
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Platinum-group elements geochemistry of felsic rocks
The mechanisms by which the platinum group elements (PGE) concentrate and fractionate during magmatic processes, especially in felsic magmatic systems, is poorly understood. The felsic igneous rocks are often linked to hydrothermal Cu-Au mineralization and the presence or absence of sulfide …
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Platinum-group elements geochemistry of felsic rocks
The mechanisms by which the platinum group elements (PGE) concentrate and fractionate during magmatic processes, especially in felsic magmatic systems, is poorly understood. The felsic igneous rocks are often linked to hydrothermal Cu-Au mineralization and the presence or absence of sulfide …
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An electrochemical investigation of platinum group minerals
… is the largest ore body in the world hosting platinum group elements (PGEs). It is a stratified orebody with three major reefs namely, the Merensky reef, UG2 reef and the Platreef. Platinum and palladium are the most abundant PGEs found in the Bushveld complex. They occur in the form of …
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X-RAY CHARACTERIZATION OF PLATINUM GROUP METAL CATALYSTS
Platinum group metals (PGMs) are used extensively as catalysts, employed in several sectors of the world energy economy. Fuel cells employing PGM catalysts show promise as power sources in the proposed hydrogen economy, using alcohols as hydrogen storage media. Currently, the most economically …
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Flow-injection analysis of the platinum-group metals
… principle methods for the determination of the platinum-group metals (PGMs) use an "off-line" assay with flame-atomic absorption spectrometry and visible spectrometry. Both suffer numerous interferences and involve time-consuming and arduous laboratory separation methods prior to analysis. An …
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Platinum-group element mineralisation in the Shetland ophiolite complex
The Shetland ophiolite complex exhibits the lower part of the definitive Penrose sequence, but chromitites from the Cliff locality contain levels of Pt and Pd which are unusual in ophiolites. Aspects of this mineralisation suggest both magmatic and hydrothermal concentration processes, although …
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Biorecovery of platinum group metals from three-way catalysts
Los metales del grupo del platino (PGMs), que incluyen platino (Pt), paladio (Pd) y rodio (Rh), son componentes indispensables de los catalizadores automotrices de tres vías (TWC), los cuales desempeñan un papel crucial en la mitigación de emisiones vehiculares al convertir gases nocivos como CO, …
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Sorption of the platinum-group elements in selected solid matrices
Recent research on the platinum-group elements (PGE) has shown increased concentrations in environmental samples, probably as a result of the widespread use of PGE (Pt, Pd and Rh in particular) as catalysts in the chemical and car industry. Most of the recent research on PGE focuses on the analysis …
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Accumulation of Platinum Group Elements by the Marine Microalga, Chlorella stigmatophora
… marine biogeochemistry of Rh, Pd and Pt, or the platinum group elements (PGE), an emerging group of contaminants whose principal emissions are associated with the abrasion of the catalytic converter in motor vehicles and chemotherapy drugs discharged in hospital wastes. In this study, Rh(III), …
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Application of platinum-group element (PGE) geochemistry to select geological problems
… The present study used the concentrations of platinum-group elements (PGEs), analysed by the fire-assay isotope dilution method, to determine the timing of sulfide saturation in an evolving magma system, which in relation to volatile saturation is one of the most important factors controlling …
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Application of platinum-group element (PGE) geochemistry to select geological problems
… The present study used the concentrations of platinum-group elements (PGEs), analysed by the fire-assay isotope dilution method, to determine the timing of sulfide saturation in an evolving magma system, which in relation to volatile saturation is one of the most important factors controlling …
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Platinum group metals catalyzed steam methane reforming via micro-channel reactor
Steam methane reforming is a well-established industrial process used for generating hydrogen and synthesis gas. By performing this reaction in micro-channel reactors it is possible to take advantage of increased heat and mass transfer rates, allowing equipment size and residence times to be …
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Interaction of germanium with platinum group metals in lateral diffusion couples
… thesis looks at metal-germanium systems of the Platinum Group Metals (PG Ms). It is of particular relevance to study possible applications of PG Ms in South Africa, the country being one of the major producers of these metals in the world today. The diffusion lengths in standard thin-film …
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Development, synthesis and anticancer evaluation of trinuclear Platinum Group Metal organometallic complexes
… study was to prepare and characterize trinuclear platinum group organometallic complexes and investigate their in vitro activity. The first series of ester containing complexes were prepared. The ligands were generated by the preparation of Schiff base ligands obtained from the condensation of …
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Ion Pairing in Aqueous Metal Sulfates and Platinum Group Metal Ammonium Solutions
… metal system is the industrially important platinum group metal (PGM) chloro-anion one. Their industrial importance relates to the search for a Green Chemistry Process for the separation of PGM chloro complexes that have been extracted from the mined ore into an acidic aqueous media. This …
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Hydrometallurgical extraction of platinum group metals from a low-grade ore concentrate
… economic and technical feasibility of processing platinum group metals (PGMs) and base metals (BMs) from a low-grade ore concentrate produced in the concentrator plant at Lonmin Pic. The PGMs of particular interest are platinum, palladium, ruthenium and rhodium, while the BMs of interest are …
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Application of the 190Pt-186Os isotope decay system to dating platinum-group minerals
Constraining the formation age of platinum-group minerals (PGM) in placer deposits has traditionally been very challenging. The 190Pt-186Os decay system, measured by laser ablation multi-collector ICPMS (LA-MC-ICPMS), has been demonstrated as a useful geochronometric tool for detrital PGM grains. …
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Electrorefining of base metal refinery residue copper alloy for platinum group metal recovery
… bleed stream for minor elements from Anglo Platinum’s Base Metal Refinery (BMR) which produces copper nickel and cobalt sulphate. It contains mainly sulphur, iron jarosites, unleached base metals and platinum group metals (PGMs), which makes the treatment of SLC necessary. The SLC is …
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Supporting Well-Defined Platinum Group Metals in Metal-Organic Frameworks for Heterogeneous Catalysis
… reaction kinetics, and catalyst stability. Platinum group metals (PGMs; Ru, Os, Rh, Ir, Pd, Pt) enjoy special distinction among transition metal catalysts `for their high selectivity and activity for a number of reactions of interest such as cross-coupling, oligomerization, and …
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