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Chromium, Hexavalent

Chromium, Hexavalent. Doris Valle 6 th Pd APES March 14, 2012. Chromium Hexavalent. Exist as several forms: chromate pigments, chromate acids, & fuming liquid

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Chromium, Hexavalent

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  1. Chromium, Hexavalent Doris Valle 6th Pd APES March 14, 2012

  2. Chromium Hexavalent • Exist as several forms: chromate pigments, chromate acids, & fuming liquid • Does not react with water at room temperature, It’s unstable in oxygen & produces a thin oxide layer that is impermeable to it and protects the metal. • Characteristics: • Gray, white, & brittle as a solid • Practically insoluble in water • Doesn’t tarnish in air

  3. Chromium Hexavalent • Movement: Enters the air, water and soil through natural processes and human activities. Most will eventually settle and end up in waters or soils. It enters the human body through inhalation in the form of dust, fume or mist. • Major Sources: stainless steel production, paints, welding, anticorrosion agents, photography, waste incineration, volcanic dust & gas

  4. Chromium Hexavalent • Toxicity Level: Extremely toxic especially when inhaled • Environmental Damage: • Can contaminate water • Can cause soil acidification which damages crops • High concentrations can damage the gills of fish • Can cause respiratory problems, lower ability to fight disease, infertility, birth defects, and tumors in animals

  5. Chromium Hexavalent • Health Risk: Carcinogen • Skin rashes • Ulcers • Respiratory problems • Weak immune systems • Kidney and liver damage • Alteration of genetic material • Lung cancer

  6. Works cited • "Chromium Compounds." EPA. Environmental Protection Agency, 6 Nov. 2007. Web. 13 Mar. 2012. <http://www.epa.gov/ttn/atw/hlthef/chromium.html>. • "Chromium - Cr." Chromium (Cr). Lenntech, 2011. Web. 13 Mar. 2012. <http://www.lenntech.com/periodic/elements/cr.htm>. • Mukherjee, Bidisha. "Effects of Hexavalent Chromium." Buzzle.com. Buzzle.com, 30 Sept. 2011. Web. 13 Mar. 2012. <http://www.buzzle.com/articles/effects-of- hexavalent-chromium.html>.

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