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.

Tellurium is widely distributed in the earth's crust in many types of deposits, especially those associated with epithermal gold and silver deposits. Small concentrations but large quantities of tellurium are present in copper porphyries, massive pyritic copper sulfides, nickel sulfide deposits, and, frequently, lead sulfide deposits.

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 …

The production of granular selenium and tellurium is incidental to the recovery of the precious metals values. The conversion of the granulars to saleable forms is for recovery (at least partially) of the expenses of the operation and for cash flow. In a conventional process flow diagram (Fig. 1), all selenium input is through the copper ...

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 ...

Selenium and tellurium mineral phases were identified, along with accessory precious metal phases. A range of mineral phases were recorded (Fig. 7; Table 1): (i) Native gold, silver, tellurium–selenium and combinations of these elements occur as individual grains and assemblages of elongate to rounded inclusions within Fe–Cu sulfides and ...

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 …

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 ...

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.

Tellurium is recognized as one of the critical elements[9,10,11,12] with an approximate production rate of 480 tons per year (2019), and about 90 pct of it comes from copper anode slime.[2,7] Major components of copper anode slime are copper, sulfur, silver, selenium, arsenic, lead, gold, nickel, antimony, and tellurium.Apart from copper …

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 …

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: …

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 …

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 ...

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 ...

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.

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 …

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.

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 …

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 ...

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 …

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 -- …

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

Selenium and tellurium are semiconductors. Tellurium forms inorganic and organic compounds that are superficially similar to corresponding selenium compounds …

M. Wobst, "Investigation of the Miscibility Gaps in the Binary Systems Silver-Tellurium, Indium-Tellurium, Gallium-Tellurium, Thallium-Tellurium and Antimony-Selenium,"Scr. Metall., 5, 583–585 (1971) in German. (Equi Diagram; Experimental) Article Google Scholar

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 …

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 ...

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 ...

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, …

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 …

Substituting Silver for Tellurium in Selenium–Tellurium Thin Films for Improving the Optical Characteristics. Open access. Published: 22 February 2022. …

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 …

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 ...

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 …

Substituting Silver for T ellurium in Selenium– T ellurium T hin Films for Improving the Optical Characteristics Alaa M. Abd‑Elnaiem 1 · A. M. Abdelraheem 1 · M. A. Abdel‑Rahim 1 · Samar ...

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 ...

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 …

Tellurium. Critical metals. Red bed. Biogenic mineralization. 1. Introduction. Selenium and tellurium (Se and Te) are relatively rare trace elements which do not …

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 …