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- W2339567897 abstract "Other| December 01, 1995 Asbestiform riebeckite (crocidolite) dissolution in the presence of Fe chelators: Implications for mineral-induced disease Andrew J. Werner; Andrew J. Werner Virginia Polytechnic Institute and State University, Department of Geological Sciences, Blacksburg, VA, United States Search for other works by this author on: GSW Google Scholar Michael F. Hochella; Michael F. Hochella Search for other works by this author on: GSW Google Scholar George D. Guthrie; George D. Guthrie Search for other works by this author on: GSW Google Scholar Jeanne A. Hardy; Jeanne A. Hardy Search for other works by this author on: GSW Google Scholar Ann E. Aust; Ann E. Aust Search for other works by this author on: GSW Google Scholar J. Donald Rimstidt J. Donald Rimstidt Search for other works by this author on: GSW Google Scholar American Mineralogist (1995) 80 (11-12): 1093–1103. https://doi.org/10.2138/am-1995-11-1201 Article history first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Andrew J. Werner, Michael F. Hochella, George D. Guthrie, Jeanne A. Hardy, Ann E. Aust, J. Donald Rimstidt; Asbestiform riebeckite (crocidolite) dissolution in the presence of Fe chelators: Implications for mineral-induced disease. American Mineralogist 1995;; 80 (11-12): 1093–1103. doi: https://doi.org/10.2138/am-1995-11-1201 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentBy SocietyAmerican Mineralogist Search Advanced Search Abstract X-ray photoelectron spectroscopy (XPS) and solution chemistry were used to monitor the changes in surface composition of crocidolite fibers in a 50 mM NaCl solution at pH = 7.5 and 22 °C in the presence of several Fe chelators (citrate, EDTA, or desferrioxamine) for up to 30 d. The data show that the introduction of Fe chelators dramatically increases the rate at which Fe is released from the surface in comparison with a control group to which no chelators were added. In particular, XPS shows that Fe3+ is more effectively removed in the presence of the chelators even though it is highly insoluble in aqueous solutions at near neutral pH. This suggests that Fe chelators can alter the dissolution mechanism of amphiboles from the process that dominates in NaCl solutions. This change in dissolution mechanism (particularly the enhanced rate of Fe release) is an important consideration for models of mineral-induced pathogenesis that rely on oxidation and reduction processes.Efforts were made to estimate the Fe-release lifetimes of crocidolite fibers under the conditions of our experiments to guide the assessment of the biodurability of these fibers in human lung tissue. Our results suggest that crocidolite fibers may persist for several years, releasing Fe to lung fluids during this time. This estimated lifetime is longer than that previously estimated for chrysotile fibers and is consistent with the lifetimes previously observed in asbestos mineral lung-burden studies. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not currently have access to this article." @default.
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- W2339567897 title "Asbestiform riebeckite (crocidolite) dissolution in the presence of Fe chelators; implications for mineral-induced disease" @default.
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