Iron-induced hydroxyl radical generation from basaltic volcanic ash
Iron-induced hydroxyl radical generation from basaltic volcanic ash
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DOI：
10.1016/j.epsl.2007.07.032
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发表时间：
2007-09-30
影响因子：
5.3
通讯作者：
Fublni, B.
中科院分区：
文献类型：
--
作者：
Horwell, C. J.;Fenoglio, I.;Fublni, B.
铁诱导的火山灰颗粒表面羟基自由基的产生是呼吸毒性的一个可能机制，除了结晶二氧化硅诱导的致病性。在这里，我们表明，火山灰产生羟基自由基，具有更大的反应性，在富铁，二氧化硅穷人的样品，如玄武岩灰。玄武岩颗粒在表面暴露出高水平的Fe（II）和Fe（III）氧化态的配位差的铁离子，这可能是这种反应性的原因。目前，玄武岩灰由于缺乏结晶二氧化硅颗粒而被认为是一种危险，但未来的危险评估应考虑其潜在的毒性。(c)2007 Elsevier B.V.保留所有权利。
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. (c) 2007 Elsevier B.V. All rights reserved.