SULFIDE

chemical compound containing sulfur and one other element or sulfur and a radical. Sulfides may be salts or esters of hydrogen sulfide, H2S, or may be formed directly, e.g., by heating a metal with sulfur. Hydrosulfides are formed when only one of the hydrogens in hydrogen sulfide is replaced with a metal or radical. Soluble metal sulfides are used in preparing dyes, in leather tanning, as depilatory compounds, and as pesticides. Sulfides of antimony, copper, lead, mercury, silver, and zinc are important as ores; the ores are often roasted, yielding sulfur dioxide and an oxide of the metal. Pyrite is iron disulfide; tarnish on silver is mostly silver sulfide. In chemical analysis, hydrogen sulfide is often used to precipitate from a solution of metal salts certain metal sulfides that have characteristic colors and solubilities. Carbon disulfide is an important solvent for organic compounds.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Sulfide
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books on: Sulfide  - 541 results

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...systematically removed with the hydrogen sulfide that results from organic reduction, while...in the hypolimnion of Linsley Pond, all sulfide ions are at once sealed in the mud as ferrous sulfide. This is probably less true in Queechy...
Table 67 Metal Grades of Deep-Ocean Sulfide Deposits Gold-Bearing Metal grades Type...potential for discovery of higher grade gold sulfide deposits than have been discovered to...Broadus 1984 indicate that the largest sulfide deposits will probably be about 30 million...
...organic matter forms ammonia and hydrogen sulfide, both of which tend to raise the pH...weak one. If the ammonia and hydrogen sulfide work their ways to near the sediment...depth as the first appearance of hydrogen sulfide and of negative values of Eh . Because...
...immobilization of zinc and copper by sulfide precipitation In wetland soils that...concentrations of ferrous iron (Fez+), sulfides can combine with iron to form insoluble...the toxicity of the free hydrogen sulfide (Gambrell and Patrick, 1978...
...one hundred feet long. The ore typically contains quartz, plus a variety of sulfide sulfur-bearing minerals, including galena lead sulfide , sphalerite zinc sulfide , tetrahedrite a copper-antimony sulfide , bornite copper-iron sulfide...
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journal articles on: Sulfide  - 170 results

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...Challenges Resulting from Sulfide Tails Management Mine tailings containing metal sulfides could have serious environmental...prevent the oxidation of sulfide exposed to weathering...Natural oxidation of metal sulfides may generate acid rock...
...Illness Associated with Exposure to Hydrogen Sulfide among Pennsylvania School Students. by...Health received complaints about hydrogen sulfide odors believed to be associated with mushroom...assessed whether exposures to hydrogen sulfide were associated with excess adverse health...
...of Caenorhabditis Elegans to Hydrogen Sulfide and Hydrogen Cyanide by Mark W. Budde , Mark B. Roth HYDROGEN sulfide (H2S) is an endogenously produced molecule...essentially room air containing hydrogen sulfide (RA/H2S). Unless otherwise stated...
...2.O), breaks down into hydrogen sulfide and other sulfur compounds under anaerobic...these sites, concentrations of hydrogen sulfide gas in residential ambient air were at...effects. At an Ohio C D landfill, hydrogen sulfide concentrations in residential ambient...
...Illness Associated with Exposure to Hydrogen Sulfide Among Pennsylvania School Students * A...variety of gases, including hydrogen sulfide. * In 1998, the Pennsylvania Department...Health received complaints about hydrogen sulfide odors believed to be associated with mushroom...
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magazine articles on: Sulfide  - 253 results

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Rotten Remedy: Hydrogen Sulfide Joins the List of the Bodys Friendly...Gases. by Jeanne Erdmann Hydrogen sulfide deserves its bad reputation. Its famous...from its odorous infamy, hydrogen sulfide, or H.sub.2S, has long been considered...
...shifting currents, normally bottom-dwelling sulfide moves up into the "photic zone," where oxygen...place. The water soon becomes full of hydrogen sulfide and depleted of oxygen. Sulfide is toxic to most organisms, but green sulfur...
...tube with a lens at one end and a zinc sulfide screen at the other. Just above the screen...alpha particle, which slams into zinc sulfide crystals. This triggers a process that...unitednuclear.com. Or make your own with a zinc sulfide screen ($10 on eBay) and commonly available...
...showed that human red blood cells convert allicin and other garlic compounds to hydrogen sulfide, one of the substances that cause garlic breath. Hydrogen sulfide was found to relax blood-vessel cells, helping maintain their flexibility and possibly...
...lower-explosive-limit gases, carbon monoxide, hydrogen sulfide and oxygen. It is the only portable gas detector to offer...environments and currently is available in three models: hydrogen sulfide and high- and low-range carbon monoxide, the company said...
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newspaper articles on: Sulfide  - 83 results

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...Development Corp. (EDC) showed that hydrogen sulfide permeating the geothermal airshed has...health. Accordingly, low-level hydrogen sulfide (H2S) concentrations emitted in the...the EDC base camp stations. Hydrogen sulfide (H2S) occurs naturally in crude petroleum...
...that lingers on the breath appears to result from hydrogen sulfide. American researchers say raw, crushed garlic generates the...processed and cooked garlic loses its ability to generate hydrogen sulfide. Garlics health benefits have been known since at least 1500...
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encyclopedia articles on: Sulfide  - 66 results

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...molten sulfur or with sulfur vapors, or by treating a metal sulfide (e.g., ferrous sulfide, FeS) with an acid. Hydrogen sulfide reacts with most metal ions to form sulfides; the sulfides of some metals are insoluble in water and have...
SULFIDE chemical compound containing...sulfur and a radical . Sulfides may be salts or esters of hydrogen sulfide , H 2 S, or may be...hydrogens in hydrogen sulfide is replaced with a...radical. Soluble metal sulfides are used in preparing...
...principal ore of copper is chalcopyrite , a sulfide of copper and iron, also called copper pyrite...copper glance, a shiny lead-gray copper sulfide; bornite, a lustrous reddish-brown sulfide of copper and iron; cuprite, a red cuprous...
...but reacts with the hydrogen sulfide present in the air, forming silver sulfide (tarnish). Silver nitrate...argentite or silver glance (silver sulfide), which is found associated with other metal sulfides, e.g., galena; horn silver...
...and in adhesives and cements; and zinc sulfide, used in making lithopone as well as...diabetes. Chief sources of zinc are the sulfide ore, zinc blende, or sphalerite (called...of zinc depends upon the ore used. The sulfide ore is roasted to the oxide, then mixed...
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