cadmium sulfide principally

cadmium | Infoplease

Cadmium does not occur uncombined in nature; greenockite, a cadmium sulfide mineral first found in Scotland, is the only commercial ore. Cadmium is obtained principally as a byproduct of the smelting and refining of ores of zinc, especially zinc sulfides, and of lead and copper. The element was discovered in 1817 by Friedrich Stromeyer.

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Cadmium: Uses, Occurrence, and Intake | Taylor & Francis Group

Cadmium is obtained as a by-product principally in the refining of zinc and to a lesser extent during the refining of copper and lead, from sulfide ores. Cadmium deposited directly on the soil can be absorbed by plants and crops, which may eventually result in increased peroral exposure.

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Hydrogen Sulfide in Drinking-water

Hydrogen Sulfide in Drinking-water Background document for development of ... cadmium, nitrate and nitrite in addition to ... Hydrogen sulfide is formed principally from the sulfur-containing amino acids in meat protein, levels being higher in anaerobically packaged meat. Dimethyl sulfide is

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Effect of green light on spectral response of cuprous ...

Cadmium sulfide (CdS) film solar cells consist of an evaporated layer of n-type CdS covered with a thin film of p-type copper sulfide (CU 2S), principally chalcocite (refs. 1 * University of Notre Dame, South Bend, Indiana. --- and 2). The ...

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Cadmium Sulfide | AMERICAN ELEMENTS

Cadmium Sulfide is a crystalline solid used as a semiconductor and in photo optic applications. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British ...

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Cadmium concentration stabilization in a continuous ...

 · Abstract Cadmium concentration stabilization in a single input-single output continuous bioreactor via sulfide concentration, as the controlled and measured output state variable, was assumed. For the above process, a novel kinetic model of the sulfate-reducing process for cadmium removal was proposed and experimentally confirmed. This model has been extended to continuous operation, …

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Magmatic Sulfide-Rich Nickel-Copper Deposits Related to ...

two major types (Naldrett, 2004): those that are sulfide-rich, typically with 10 to 90 percent sulfide minerals, and have economic value primarily because of their Ni and Cu contents; and those that are sulfide-poor, typically with 0.5 to 5 percent sulfide minerals, and are exploited principally for PGE.

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Operation LAC | Military Wiki | Fandom

Operation LAC was undertaken in 1957 and 1958 by the U.S. Army Chemical Corps. Principally, the operation involved spraying large areas with zinc cadmium sulfide. The U.S. Air Force loaned the Army a C-119, "Flying Boxcar", and it was used to disperse zinc cadmium sulfide by the ton in the atmosphere over the United States.

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Public activities coordination tool

Cadmium sulfide (CdS), solid soln. with zinc sulfide, ... usually opaque substance consisting principally of combinations of inorganic oxides of aluminum, calcium, chromium, iron, magnesium, silicon, titanium, or zirconium which conventionally is formed first by fusion or sintering at very high temperatures, then by cooling, generally resulting ...

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B: Summary of Doses and Concentrations of Zinc Cadmium ...

This document has been prepared for the Subcommittee on Zinc Cadmium Sulfide to summarize some estimates of concentrations and potential exposures (time-integrated concentrations) of zinc cadmium sulfide (ZnCdS) that were achieved during the use of this compound in certain air-dispersion tracer tests.

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US4629509A

Leaching of cadmium and lead from solid residues obtained in the incineration of refuse may be reduced to environmentally acceptable levels by the addition of calcium sulfide to such residues. A particularly convenient method involves the addition of dry lime and an aqueous solution of an inorganic salt supplying sulfide, especially an alkali metal sulfide, in equimolar quantities.

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Carbonyl sulfide | COS

Carbonyl sulfide, a new hydrophobic and volatile metabolite of disulfiram was found in blood samples from alcoholics treated with single or repeated doses of disulfiram.The dosage schedule included 400 mg of disulfiram every second or third day. After an interval of 3 days with no treatment, all were given a dose of 400 mg and blood samples taken before ingestion and 4 hr after ingestion.

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Home | National Academies

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3 HEALTH EFFECTS

The primary purpose of this chapter is to provide public health officials, physicians, toxicologists, and other interested individuals and groups with an overall perspective on the toxicology of cadmium. It contains descriptions and evaluations of toxicological studies and epidemiological investigations and provides conclusions, where possible, on the relevance of toxicity and toxicokinetic ...

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All the information on Cadmium

Cadmium is found principally in association with zinc sulfide based ores and, to a lesser degree, as an impurity in lead and copper ores. It is also found in sedimentary rocks at higher levels than in igneous or metamorphic rocks, with the exception of course of the nonferrous metallic ores of zinc, lead and copper.

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(PDF) The influence of pH and cadmium sulfide on the ...

The influence of pH and cadmium sulfide on the photocatalytic degradation of 2-chlorophenol (2-CP) in titanium dioxide suspensions was investigated to evaluate the feasibility of mixed semiconductors on the photodegradation of chlorinated organics in

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POLYMETALLIC VEIN AND REPLACEMENT DEPOSITS …

cadmium, and arsenic. (3) Water draining pyrite-rich, carbonate-poor tailings and waste dumps tends to be acidic to highly acidic (pH 2 to 5), contains hundreds to several thousand s of mg/l iron and aluminum, and tens to several hundreds of mg/l zinc and

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Cadmium definition and meaning | Collins English Dictionary

Cadmium definition: Cadmium is a soft bluish-white metal that is used in the production of nuclear energy . | Meaning, pronunciation, translations and examples

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Process of making a photoconductive material of cadmium ...

1. A process for making a photoconductive material which comprises preparing a photoconductive material of fine powder particles principally of cadmium sulfide and cadmium carbonate in physico-chemical combination, washing said photoconductive material with water to remove water soluble matter, and subsequently adsorbing a silicon compound on said washed photoconductive material so that said ...

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Lattice Constants

Element or Compound: Name: Crystal Structure: Lattice Constant at 300 K (Å) C: Carbon (Diamond) Diamond: 3.56683: Ge: Germanium: Diamond: 5.64613: Si: Silicon: Diamond

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WebElements Periodic Table » Cadmium » the essentials

Cadmium atoms have 48 electrons and the shell structure is 2.8.18.18.2. The ground state electronic configuration of neutral cadmium is [ Kr ]. 4d10. 5s2 and the term symbol of cadmium is 1S0. Your user agent does not support the HTML5 Audio element. Cadmium …

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Co-Occurrence of Drinking Water Contaminants Primary and ...

----- 3 Description of Secondary Constituents 3.6 Cadmium Cadmium does not exist in nature as thje native metal but principally as the sulfide ore (greenockite) Cadmium occurs in aqueous solution in the +2 valence state The free Cd2+ ion occurs at pH levels below 8 At higher pH values, [Cd(OH)]* is formed, and in very alkaline solutions [Cd(OH ...

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Exogenous hydrogen sulfide reduces cadmium uptake and ...

 · Greenhouse hydroponic experiments were conducted to evaluate the ameliorative effects of NaHS, a donor of hydrogen sulfide (H2S), on different levels of cadmium (Cd) stress in barley seedlings. The results showed that Cd stress dramatically reduced plant biomass, chlorophyll and soluble protein contents. Exogenous application of H2S significantly alleviated Cd-induced growth inhibition …

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Toxicologic Assessment of the Army''s Zinc Cadmium Sulfide ...

 · Operation LAC was undertaken in 1957 and 1958 by the U.S. Army Chemical Corps. [2] Principally, the operation involved spraying large areas with zinc cadmium sulfide. [1] The U.S. Air Force loaned the Army a C-119, "Flying Boxcar", and it was used to disperse zinc cadmium sulfide by the ton in the atmosphere over the United States. [3] The first test occurred on December 2, 1957 …

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Operation LAC

Principally, the operation involved spraying large areas with zinc cadmium sulfide. The U.S. Air Force loaned the Army a C-119, "Flying Boxcar", and it was used to disperse zinc cadmium sulfide by the ton in the atmosphere over the United States.

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Ksp Table

Cadmium carbonate CdCO 3 5.2×10 –12. Cadmium hydroxide Cd(OH) 2 2.5×10 –14. Cadmium oxalate CdC 2 O 4 1.5×10 –8. Cadmium sulfide* CdS 8×10 –28. Calcium carbonate CaCO 3 2.8×10 –9. Calcium chromate CaCrO 4 7.1×10 –4. Calcium fluoride CaF 2 5.3×10 –9. Calcium hydrogen phosphate CaHPO 4 1×10 –7. Calcium hydroxide Ca(OH) 2 5 ...

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Cadmium

Cadmium is found in nature in mineral forms and is obtained for commercial uses principally from cadmium ore, called greenockite, which is commonly found in association with zinc ore. Commercial production of cadmium ore depends on the mining of zinc. ... It is a component of some compound semiconductors, such as cadmium sulfide, cadmium ...

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Dynamic Imaging: Fluoroscopy | Radiology Key

 · In fluoroscopy, distortion is a result of inaccurate control or focusing of the electrons released at the periphery of the photocathode and the curved shape of the photocathode. The combined result is an unequal magnification (distortion) of the image, creating what is called a "pincushion appearance" (Figure 10-4).

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King''s yellow | pigment | Britannica

Other articles where King''s yellow is discussed: orpiment: …a very fine grade called king''s yellow, which was used until cadmium yellow (principally cadmium sulfide) became available.

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U14IN~ESCENT TELLURIUM-DOPED CADMIUM SULFIDE …

Luminescent Tellurium-Doped Cadmium Sulfide Electrodes as Probes of Semiconductor Excited-State Deactivation Processes in 6. PERFORMING ORG. REPORT NUMBER Photoelectrochemical Cells. 7. AUTHOR(q) D. CONTRACT OR GRANT NUMUER(J) Arthur B. Ellis, Bradley R. Karas and N00014-C-78-06331k Holger H. Streckert 1.

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Orpiment | mineralogy | Britannica

Because of its extreme toxicity, it was abandoned, except for a very fine grade called king''s yellow, which was used until cadmium yellow (principally cadmium sulfide) became available. This article was most recently revised and updated by Amy Tikkanen, Corrections Manager.

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Cromium sulfide | Sigma-Aldrich

cadmium sulfide. Support Customer Support Contact Us FAQ Safety Data Sheets (SDS) Certificates (COA/COO) Quality & Regulatory Calculators & Apps Webinars. Orders Quick Order Custom Products Commerce Solutions. Company About Us Responsibility Events Press Releases Programs Careers Offices. Social Media. MilliporeSigma.

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Free Radiology Flashcards about Intro Rad Pro week 3

zinc cadmium sulfide : The input phosphor converts___ to ___. x-rays, light: The ___ in the image intensifier emits electrons when it is stimulated by light photons: photocathode : The number of light photons emitted withing the image intensifier is ___ to the amount of x-ray photons exiting the patient. directly proportional

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Cadmium

Cadmium (Cd) is a soft, malleable, bluish white metal found in zinc ores, and to a much lesser extent, in the cadmium mineral greenockite. Most of the cadmium produced today is obtained from zinc byproducts and recovered from spent nickel-cadmium batteries. First discovered in Germany in 1817, cadmium found early use as a pigment because of its ...

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Minerals used as pigments

 · 7. Metal Color Compound Used •Chromium Chrome green Chromic oxide Chrome yellow Lead chromite •Cadmium Cadmium red Cadmium sulfide Cadmium yellow Cadmium sulfide •Cobalt Cobalt blue Cobalt oxide and silicate •Mercury Vermilion Mercuric sulfide •Calcium Venetian red Iron oxide •Carbon Carbon black Natural gas soot Black Natural graphite.

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Cadmiums | Article about cadmiums by The Free Dictionary

Cadmium does not occur uncombined in nature; greenockite, a cadmium sulfide mineral first found in Scotland, is the only commercial ore. Cadmium is obtained principally as a byproduct of the smelting and refining of ores of zinc, especially zinc sulfides, and of lead and copper. The element was discovered in 1817 by Friedrich Stromeyer.

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