Selective Recovery of Valuable Metals (Se, Te, Cu) from the Selenium …
Selenium (Se) and tellurium (Te), as rare-dispersed non-metallic elements with strategic significance, are widely adopted in the high-technology field such as semiconductors [1, 2] and solar cells [3, 4] by their excellent properties.The independent ore deposits are rare in nature, which are usually associated with copper, lead, zinc, gold, …
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Minerals | Free Full-Text | Tellurium and Selenium …
Findings of selenium and tellurium minerals are not often, but are of big interest, because they may indicate precious metals' mineralization: Se and Te often associate with gold, silver, platinum, and …
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The abundances of selenium, tellurium, silver, palladium, cadmium, and
Semantic Scholar extracted view of "The abundances of selenium, tellurium, silver, palladium, cadmium, and zinc in chondritic meteorites." by L. Greenland. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 217,412,857 papers from all fields of science.
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Remobilization and mineralization of …
Tellurium. Critical metals. Red bed. Biogenic mineralization. 1. Introduction. Selenium and tellurium (Se and Te) are relatively rare trace elements which do not …
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Metals | Free Full-Text | Selenium and Tellurium Separation: …
Selenium is a metalloid element found in the sulfide minerals and copper anode slime alongside precious metals, tellurium, copper, silver, and nickel. Selenium as a metalloid has broad applications in solar cell fabrication [ 1 ], semiconductor manufacturing [ 2 ], pharmaceuticals and biomedical uses [ 3 ], pigments for ceramics, …
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Chemistry of Tellurium (Z=52)
Tellurium is a semimetallic, lustrous, crystalline, brittle, silver-white element. It is usually available as a dark grey powder and has metal and non-metal properties. Te forms many compounds corresponding to those of sulfur and selenium. When burned in the air, tellurium has a greenish-blue flame and forms tellurium dioxide as a result.
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4-Tetrafluoropyridyl Silver(I), AgC5F4N, in Redox
Request PDF | 4-Tetrafluoropyridyl Silver(I), AgC5F4N, in Redox Transmetalations with Selenium and Tellurium(23) | Se(C5F4N)2 and Te(C5F4N)2 were prepared via redox transmetalations of AgC5F4N and ...
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Selective separation and recovery of selenium from
The intermetallic compounds included gold telluride, gold, silver, and selenium. Compounds were formed by gold, silver, tellurium, copper arsenic, selenium, and elemental substances included selenium and tellurium. Due to the low content of elemental gold, no diffraction peaks of each phase were observed. Download : Download …
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Proceeding Paper Leaching Kinetics of Selenium, …
Leaching Kinetics of Selenium, Tellurium and Silver from Copper Anode Slime by Sulfuric Acid Leaching in the Presence of Manganese(IV) Oxide and Graphite †. Kurniawan …
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Microbial-Based Biotechnology: Production and Evaluation of Selenium …
Using seleno-compounds and telluric compounds is a practical approach for developing solutions against drug-resistant bacterial infections and malignancies. It will accelerate the search for novel treatments or adjuvants for existing therapies. Selenium and tellurium nanospheres can be produced by lactic acid bacteria. The bacteria can …
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SELENIUM AND TELLURIUM: STATE OF THE MARKETS, …
Selenium and tellurium are used as alloying additions in ferrous and nonferrous metallurgy. The current state of the international and Russian markets for selenium and tellurium is surveyed based on the literature data of the last several years. Selenium. Selenium comprises 6·10–5 mass % of the Earth's core and is classified as a trace ...
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Tellurium
Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, silvery-white metalloid that is chemically similar to sulfur and selenium. Tellurium is relatively rare, making up about 0% of the Earth's crust by weight. Tellurium has several industrial applications.
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Nonlinear Band Gap Tunability in Selenium-Tellurium Alloys …
In this Letter, we report the alloying of the high-band-gap photovoltaic elemental absorber selenium with the isomorphic low-band-gap semiconductor tellurium to tune the band gap energy of Se 1-x Te x to the optimal value for photovoltaic absorber. Photovoltaic devices based on crystalline Se 1-x Te x alloys are promising candidates for extremely cheap and …
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Reduction of inorganic compounds with molecular hydrogen …
Stoichiometry with compounds of arsenic, selenium, tellurium, transition and other elements. ... vanadium, manganese, iron, copper, molybdenum, tungsten, osmium, ruthenium, gold, silver, and uranium, as well as molecular oxygen. Chemical and manometric data indicate that the following reductions are essentially quantitative: …
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Selective Separation and Recovery of Tellurium from …
However, common components of the slimes are copper, silver, gold, selenium, tellurium, arsenic, bismuth, antimony, lead, barium, and platinum-group metals (PGMs) [5,6,7,8]. Tellurium is a rare metalloid that is majorly produced from copper anode slime . Tellurium is categorized as a strategic metal owing to its scarcity in the primary ...
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Research and Industrial Application of Selenium and …
Selenium and tellurium are semiconductors. Tellurium forms inorganic and organic compounds that are superficially similar to corresponding selenium compounds …
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Novel valence regulation-vacuum gasification method for …
1. Introduction. Selenium and tellurium have become key components in supporting the development of high-tech material industries [1, 2].Selenides exhibit promising semiconducting properties, which bring them wide applications in semiconductor devices [3], copper-indium-gallium-selenide thin film solar cells [4], printed circuit boards …
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Determination of copper, gold, platinum, palladium, selenium, tellurium …
The accurate determination of copper, gold, platinum, palladium, selenium, tellurium, bismuth, iridium and rhodium in platinum and palladium concentrates was an important theoretical support for ...
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Selenium and Tellurium Chemistry
Both selenium and tellurium are very rare. Selenium has an abundance at 0.05–0.09 parts per million and is among the 25 least common elements in the Earth's crust. …
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4-Tetrafluoropyridyl Silver (I), AgC5F4N, in Redox …
Se(C5F4N)2 and Te(C5F4N)2 were prepared via redox transmetalations of AgC5F4N and the corresponding elements in good yields. The crystal structures of both derivatives exhibit infinite chains caused by a weak intermolecular contact between the chalcogen and one nitrogen atom with a T-shaped (ψ-pentagonal-bipyramidal) ligand …
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Thermodynamics of oxygen in dilute liquid silver–tellurium alloys
The by-product of the electrolytic refining of copper, i.e., "anode slime" [], is a valuable source of silver, gold, platinum group metals, selenium, and tellurium.The processing of slime usually involves many steps with the common goal of removing Cu, Se, Te, etc., and leaving pure Ag, Au, and Pt-group metals as raw silver—so-called doré …
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Tellurium: A Rare Element with Influence on Prokaryotic and …
Tellurium (Te) is a member of the chalcogen group, which includes oxygen, sulphur, selenium (Se) and polonium [ 1 ]. The first three members of the chalcogen group have crucial functions in biochemistry, biology and medicine, whereas Te is a strange element with no apparent role in biological systems. Moreover, it belongs to the group of …
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SELENIUM AND TELLURIUM Indian Minerals Yearbook …
Tellurium is found mostly in tellurides associated with metals, such as, bismuth, lead, gold and silver . It is found with selenium in the anode slime from electrolytic copper refineries. EXTRACTION Selenium and tellurium metals were being recovered as allied products at Ghatsila Copper Smelter of HCL in Jharkhand, where the annual installed ...
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Proceeding Paper Leaching Kinetics of Selenium, …
Dissolution behavior of (a) selenium, (b) tellurium and (c) silver in H 2SO4 solution as a function of time (variation of H2SO4 conc., 0.5–3.0 M; stirring speed 500 rpm; MnO2/graphite/copper anode slime (CAS) mass ratio 0.8/0.8/1; and temperature 70 °C). 3.2. Effect of MnO2 Dosage Here, MnO2 dosage was expressed as the mass ratio of …
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Selenium and Tellurium Statistics and Information
In the late 1990's, the use of selenium (usually with bismuth) as an additive to plumbing brasses to meet no-lead environmental standards became important. The average price for selenium in 2000 was $3.82 per pound. Tellurium is a relatively rare element, in the same chemical family as oxygen, sulfur, selenium, and polonium: oxygen and sulfur ...
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Leaching Kinetics of Selenium, Tellurium and Silver from …
Sulfuric acid leaching of copper anode slime (CAS) in the presence of manganese(IV) oxide (MnO2) and graphite was investigated for Se, Te and Ag recovery. The study reveals that the leaching of Se, Te and Ag was facilitated by the galvanic interaction with MnO2, and graphite played the role of a catalyst. The leaching process …
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Ligands containing elements of Group 6B. Part VII.
Comparison of the donor properties of some dicarboxylic acids of sulphur, selenium, and tellurium towards silver(I) and some bivalent metal lons D. K. Laing and L. D. Pettit, J. Chem. Soc., Dalton Trans., 1975, 2297 DOI: 10.1039/DT9750002297
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Thermodynamics of oxygen in dilute liquid silver-selenium …
Therefore, several authors have been studying the behavior of trace elements in the smelting process, including copper, tellurium, selenium, silver, and rhodium (Swinbourne et al. 1996, Pickles et ...
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Minerals | Free Full-Text | Tellurium and Selenium …
Findings of selenium and tellurium minerals are not often, but are of big interest, because they may indicate precious metals' mineralization: Se and Te often associate with gold, silver, platinum, and palladium mineralization and can form chemical compounds with these metals. Gold deposits ...
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Selective Separation and Recovery of Valuable Metals by
It is concluded that sulfur, selenium, tellurium, antimony, bismuth and lead can volatilize quickly and concentrate into vapor phase while silver, copper, gold and iron remain in the condensed phase. The molecular free path 16, 17, 18 is an important factor affecting the movement of vapor molecules.
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