Publication details for Prof. Claire HorwellHorwell, C.J., Fenoglio, I. & Fubini, B. (2007). Iron-induced hydroxyl radical generation from basaltic volcanic ash. Earth and Planetary Science Letters 261(3-4): 662-669.
- Publication type: Journal Article
- ISSN/ISBN: 0012-821X
- DOI: 10.1016/j.epsl.2007.07.032
- Keywords: Volcanic ash, basalt, iron, respiratory health hazard, free radical generation, Fenton activity
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
Iron-induced hydroxyl radical generation from the surface of volcanic ash particles is a possible mechanism of respiratory toxicity in addition to crystalline-silica induced pathogenicity. Here we show that volcanic ash generates hydroxyl radicals, with greater reactivity in iron-rich, silica-poor samples, such as basaltic ash. Basaltic particles expose at the surface high levels of poorly-coordinated iron ions in both Fe(II) and Fe(III) oxidation states which are likely to be the cause of such reactivity. Hitherto, basaltic ash has been disregarded as a hazard due to the lack of crystalline silica particulate but future hazard assessment should consider its toxic potential.