From Selenium- to Tellurium-Based Glass Optical Fibers …
Chalcogenide glasses are based on sulfur, selenium and tellurium elements, and have been studied for several decades regarding different applications. Among them, selenide glasses exhibit excellent infrared transmission in the 1 to 15 µm region. Due to their good thermo-mechanical properties, these glasses could be easily …
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 …
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 …
Separation of tellurium and selenium ions from leach liquor …
Tellurium and selenium isotopes have wide applications in nuclear medicine. In this study, extraction of these elements from copper anode slime is carried out by using the hollow fiber renewal liquid membrane technique (HFRLM). ... 4.98% silver, 0.39% gold, 0.44% tellurium, and 42% barite . The other minerals are lead, sulfur, silica, …
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: …
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 …
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 …
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, …
Name the common elements present in the anode mud in
In the electrolytic refining of copper, the anode mud contains antimony, selenium, tellurium, silver gold and platinum. These are impurities in blister copper. They are less reactive and unaffected by C u S O 4 − H 2 S O 4 solution and hence, settle down under anode as anode mud.
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. …
GB/T 5121.28-2021 PDF English standard versions (GBT …
BASIC DATA; Standard ID: GB/T 5121.28-2021 (GB/T5121.28-2021) Description (Translated English) Methods for chemical analysis of copper and copper alloys -- Part 28: Determination of chromium, iron, manganese, cobalt, nickel, zinc, arsenic, selenium, silver, cadmium, tin, antimony, tellurium, lead and bismuth content -- …
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 …
Comprehensive recoveries of selenium, copper, gold, silver …
A lead concentrate with lead grade of 57.2% was eventually obtained after extracting selenium and copper, gold and silver. The recoveries of selenium, copper, gold, silver and lead separately achieved 92.9%, 95.8%, 99.1%, 99.4% and 99.8% under optimal conditions, and the purities of obtained products of simple substance selenium, sponge …
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 ...
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 …
Substituting Silver for Tellurium in …
Substituting Silver for Tellurium in Selenium–Tellurium Thin Films for Improving the Optical Characteristics. Open access. Published: 22 February 2022. …
The Ag-Te (Silver-Tellurium) System | Journal of Phase …
M. Wobst, "Development of Miscibility Gaps in the Binary Systems Silver-Tellurium, Indium-Tellurium, Gallium-Tellurium, Tnalium-Tellurium and Antimony-Selenium,"Scr. Metall, 5, 583- 586 (1971) in German. (Equi Diagram; Experimental) Article Google Scholar
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 …
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.
The abundances of selenium, tellurium, silver
EXPERIMENTAL Selenium, tellurium, silver, palladium, zinc and cadmium, were determined simultaneously by a neutron activation technique employing radio-chemical separations. The nuclear data pertinent to these determinations are summarized in Table 1. Interfering reactions are summarized by Koch (1960) and are of negligible effect in …
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 …
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.
Pressure leaching of selenium and tellurium from scrap …
It is rich in large amounts of gold, silver, selenium, tellurium, antimony, bismuth, platinum groups and other rare and precious metals and contains lead, arsenic, cadmium, etc., which are ...
Selenium and Tellurium Statistics and Information
Tellurium is a relatively rare element, in the same chemical family as oxygen, sulfur, selenium, and polonium: oxygen and sulfur are nonmetals, polonium is a metal, and …
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 …
Determination of selenium and tellurium in silver
Schoeller and Powell1 suggest roasting in a stream of dry chlorine gas as a means of separating selenium and tellurium from silver, but the present investigators were unsuccessful in applying this technique. Spectrographic methods lack the necessary sensitivity, especially for selenium; polarographic methods require the isolation of the …
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 ...
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.
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, …
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 ...
