Chromium(VI) Handbook by Jacques Guertin, Visit Amazon's James A. Jacobs Page, search

By Jacques Guertin, Visit Amazon's James A. Jacobs Page, search results, Learn about Author Central, James A. Jacobs, , Cynthia P. Avakian

Prepare through a staff of scientists, engineers, regulators, and legal professionals, the Chromium(VI) guide consolidates the most recent literature in this subject. The wide scope of this publication fills the necessity for a finished source on chromium(VI), enhancing the data of this contaminant at a time whilst the level and measure of the matter continues to be being assessed. It addresses certainly happening and anthropogenic assets, geology and geochemistry, toxicity, therapy, regulatory concerns and criminal instances, and suggestions. The instruction manual is a well timed and beneficial reference for environmental scientists, engineers, urban planners, and extra.

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1A. 4. , Cr(III) chloride is violet]. This occurs because lower energy electrons move from a lower energy electrons move formula lower energy d orbital to higher energy d orbitals resulting in energy being taken in. When these electrons return to their original position, they release specific energies producing light of specific colors. 5. Like the main group metals, they form salts. 2 Electronic Configuration of Elements in Period 4 Subshell Atomic No. 1A. , Cd(OH)42− and CrO42−] (Royal Society of Chemistry, 2000).

Chromium is used as a corrosion-resistant decorative plating agent. It is also used as a pigment to give glass an emerald color. Both the green in emeralds and the red in rubies are credited to trace amounts of Cr oxides in the crystal lattice structure. PbCrO4 as chrome yellow is used as a pigment in yellow paint. K2Cr2O7, a form of Cr, has been used in the leather production business as a tanning agent. Chromates are compounds used in the textile industry as a mordant. Products that contain Cr(VI) include paints, pigments, inks, fungicides, and wood preservatives.

Doses in animals of Cr(VI) greater than 10 mg/kg body mass mainly affect the gastrointestinal tract, kidneys, and hematopic system (IPCS, 1988). Cr(VI) causes cancerous tumors in mice by inhalation and is considered a possible human carcinogen by this route because workers engaged in the production of CrO42− salts and pigments experience an increased risk of developing bronchial carcinomas. However, ingestion of Cr(VI) has not been observed to cause cancer because it is believed that Cr(VI) is reduced to Cr(III) in the gastrointestinal tract (IPCS, 1988; WHO, 1988 and 1996; Smith and Huyck, 1999; CDHS, 2003).

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