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首页> 外文期刊>BioMetals: An International Journal on the Role of Metal Ions in Biology, Biochemistry and Medicine >The release of iron from different asbestos structures by hydrogen peroxide with concomitant O-2 generation
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The release of iron from different asbestos structures by hydrogen peroxide with concomitant O-2 generation

机译：The release of iron from different asbestos structures by hydrogen peroxide with concomitant O-2 generation

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摘要

Treatment of aqueous suspensions of different asbestos fibers (amosite, anthophyllite, chrysotile, and crocidolite) at 0-4 degrees C and pH 7.2 with H2O2 results in the consumption of H2O2 with concomitant release of iron and production of O-2. During incubations, [H2O2] decreased in proportion to the mass of the suspended fiber, the duration of incubation, and the initial [H2O2]. The consumption of H2O2, production of O-2 and release of iron all vary synergistically with the structure of the asbestos fiber. Release of silicon during the incubation was small relative to the decrement in [H2O2], reflecting a lack of dissolution of the fiber. The data are consistent with a redox process for the release of surface bound iron and it is significant that iron release occurs in the absence of a Fe(II) or Fe(III) chelator. The implications of iron release from the asbestos surface may be important in inflammatory disorders in which both silicate bound iron and H2O2 accumulate. [References: 26]

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