Treatment of asbestos and silicates to reduce their toxicity
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United States of America Patent
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Oct 13, 1992
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app pub date -
Sep 13, 1990
filing date -
Sep 13, 1990
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Expired
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Abstract
This invention pertains to an improved method of inhibiting peroxide-reduction catalytic activity and concomitant toxicity of asbestos and nonasbestos iron-containing silicates. These undesirable reactions can be substantially reduced or essentially eliminated by contacting these potentially harmful materials with an aqueous solution comprising a non-mutagenic non-toxic iron chelating agent, such as phytic acid, diethylenetriamine pentaacetic acid (DTPA) or derivatives of these.
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