platinum group concentration

Platinum Group Concentration

Platinum group - Wikipedia

The six platinum-group metals are ruthenium, rhodium, palladium, osmium, iridium, and platinum. They have similar physical and stone properties, and tend to occur together in the same mineral deposits. However they can be further subdivided into the iridium-group platinum-group elements (IPGEs: Os, …

Platinum group | stone element group | Britannica

Assaying ores and concentrates for platinum-group metals is extremely difficult, since the concentration of any particular metal may be less than one part per million. Initial concentration is …

Platinum - Wikipedia

Platinum is an extremely rare metal, occurring at a concentration of only 0.005 ppm in Earths crust. It is sometimes mistaken for silver. Platinum is often found chemically uncombined as native platinum and as alloy with the other platinum-group metals and iron mostly.

Concentration of Platinum Group Elements during the Early ...

One such significant enigmatic feature is the preservation of extremely dense and heavy platinum group elements (PGEs): Pt, Pd, Rh, Ru, Ir, Os. Concentration of PGEs during this period could have taken place in two ways: 1) presence of particular matter capable of preserving PGEs near the earths surface, 2) transportation of PGEs by magma flows from deep lithospheric (asthenospheric) layers (slabs) to …

Concentrations of Platinum Group Elements in 122 U.S. Coal ...

The highest Pd value is 28 parts per billion in a bituminous coal sample from Greenbrier County, West Virginia. A second coal sample from the same location has less than 4 ppb Pd. Platinum: Thirty-six of the 122 samples had "less than" values for platinum (generally <2 ppb). The highest concentration of Pt...

Concentration and Distribution of Platinum Group Elements ...

Concentration and Distribution of Platinum Group Elements (Pt, Pd, Rh) in Airborne Particulate Matter in Frankfurt am Main, Germany Fathi Zereini * † , Friedrich Alt ‡ , Jürge Messerschmidt ‡ , Alex von Bohlen ‡ , Karlheinz Liebl § , and Wilhelm Püttmann †

(PDF) Concentration of Platinum Group Elements During the ...

The main aim of this article is analysis of the requirements – initial concentration and preservation of PGE and PGM (Platinum Group Minerals) during the early Earth evolution, as well as ...

A New Way to Find Platinum Group Metals - Advancing Mining

The average grade of platinum-group elements (PGEs) in ores mined for their PGE concentrations range from 5 to 15 ppm. In most rocks, platinum-group minerals range in size from less than a micron to a few hundred microns in diameter, so the presence of PGEs must be confirmed by laboratory analysis. Over 100...

Concentration of some platinum-group metals in coal ...

Concentration of some platinum-group metals in coal. Int. J. Coal Geol., 1: 95--99. New data on some platinum group metals in coal indicate that the concentration of Pt is generally less than about 5 ppb, that of Pd is generally less than 1 ppb, and that of Rh is generally less than 0.5 ppb.

Changes in Palladium, Platinum, and Rhodium Concentrations ...

The results were compared to analyses of platinum group elements (PGE) in soils collected along this same stretch of highway in 1994. The goal of this study is to detect any changes that may have occurred in the concentration and environmental distribution patterns of these metals over this 10 year period.

Chapter 6.11 Platinum - World Health Organization

Platinum, together with the other platinum group metals, is present at low levels in the lithosphere, with an average platinum concentration of 0.001–0.005 mg/kg (4). Concentrates of economic importance are present in the Transvaal, South Africa, in Siberia and in the Urals at

US4295881A - Process for extraction of platinum group ...

A process for treating chromite-bearing ores to obtain useful mineral values, especially platinum group metal, therefrom wherein the ore is separated into magnetic and non-magnetic fractions; the non-magnetic fraction, containing a substantial portion of the platinum group metals, is concentrated and smelted to produce a metal layer containing platinum group metals; and the platinum group metals …

Extraction and Refining of the Platinum Metals | Johnson ...

From this stage onwards the concentration of the platinum group metals is more rapid and the processes entirely chemical. First the slime is subjected to roasting and leaching attacks to remove the last of the copper, nickel, iron and sulphur. This produces an enriched slime running approximately 65 per cent of the platinum group metals and gold.

The concentration of platinum-group elements and gold in ...

The concentration of platinum-group elements and gold in southern African and Karelian kimberlite-hosted mantle xenoliths: Implications for the noble metal content of the Earths mantle. Author links open overlay panel W.D. Maier a P. Peltonen b I. McDonald c S.J. …

Platinum group elements in the environment and their ...

Platinum group elements in the environment and their health risk Article · Literature Review in Science of The Total Environment 318(1-3):1-43 · February 2004 with 670 Reads How we measure reads

THE RECOVERY OF PLATINUM, PALLADIUM, AND GOLD …

Leaching platinum group metals with cyanide, however, is a new concept and process option. The research available is very much limited to the recovery of platinum group metals from recycled automotive catalyst using cyanide8-14. The concentration of platinum group metals in

Platinum Group Metals | Chem230 Wiki | Fandom

The Platinum Group Metals (PGM) are located in the 5th and 6th rows of the transition metal section of the periodic table. Common characteristics include resistance to wear, oxidation, and corrosion, high melting points, and oxidation states of +2 to +4. They are generally non-toxic. For our...

what concentration camp is near Frankfurt that is best to ...

Concentration camp (KZ) Strutthof near Natzweiler in the French region of Alsace is easily accessible from Frankfurt (about a 2 hours to 2 1/2 hrs drive). It comes with all the cruelty incl. special torture rooms and rooms for "medical exams".

Platinum - Palladium Flotation

Because most of the platinum-group bearing sulfides occurred as fine grains and required grinding to approximately 200-mesh for liberation, flotation was investigated as a means for concentrating the metal values. The low concentration of metal values in the ore …

Platinum Ores | Article about Platinum Ores by The Free ...

A slime of “raw” platinum, which is a platinum concentrate containing 70–90 percent minerals of platinum group metals, with the remainder consisting of chromites, forsterites, and serpentines, is produced by wet concentration of metalliferous sands and chromite ores.

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