The release of iron from different asbestos structures by hydrogen peroxide with concomitant O2 generation.

Journal Article

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 O2. 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 O2 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.

Full Text

Duke Authors

Cited Authors

  • Ghio, AJ; Taylor, DE; Stonehuerner, JG; Piantadosi, CA; Crumbliss, AL

Published Date

  • January 1998

Published In

Volume / Issue

  • 11 / 1

Start / End Page

  • 41 - 47

PubMed ID

  • 9450316

Pubmed Central ID

  • 9450316

International Standard Serial Number (ISSN)

  • 0966-0844

Digital Object Identifier (DOI)

  • 10.1023/a:1009257323963


  • eng

Conference Location

  • Netherlands