Department of Earth Sciences, University of Turin, Via Valperga Caluso 35, I-10125 Turin, Italy; "G. Scansetti" Interdepartmental Center for Studies on Asbestos and Other Toxic Particulates, University of Turin, Via Pietro Giuria 7, I-10125 Turin, Italy.
"G. Scansetti" Interdepartmental Center for Studies on Asbestos and Other Toxic Particulates, University of Turin, Via Pietro Giuria 7, I-10125 Turin, Italy; Department of Chemistry, University of Turin, Via Pietro Giuria 7, I-10125 Turin, Italy.
J Hazard Mater. 2022 Feb 15;424(Pt C):127528. doi: 10.1016/j.jhazmat.2021.127528. Epub 2021 Oct 16.
In Naturally Occurring Asbestos (NOA) rich areas, water flows through asbestos bearing rocks and soils and generates waterborne fibres that may migrate in air and become a risk for humans. Research on the migration and dispersion after water vaporisation has been so far only marginally evaluated. This study investigates the migration in air of asbestos from a set of suspensions contaminated by chrysotile from Balangero (Italy), under controlled laboratory conditions. We evaluated i) the morphological modifications that might occur to chrysotile during migration from water to air, and ii) the amount of airborne chrysotile mobilised from standardised suspensions. Morphological alteration of asbestos fibres occurred during water-air migration and impacted on the analytical response of electron microscopy. Waterborne asbestos concentration higher than 40 ∙ 10 f/L generates in air concentration higher than 1 fibre per litre [f/L], the alarm threshold limit set by World Health Organization for airborne asbestos. A possible correlation between the waterborne fibre concentration as mass or number of fibres per volume unit [μg/L or f/L] was observed.
在富含天然石棉（NOA）的地区，水会流经含有石棉的岩石和土壤，并产生水中纤维，这些纤维可能会在空气中迁移，从而对人类构成风险。迄今为止，对水蒸气蒸发后迁移和分散的研究仅得到了有限的评估。本研究在受控实验室条件下，调查了来自一系列受巴朗热罗（意大利）温石棉污染的悬浮液中的石棉在空气中的迁移情况。我们评估了 i）石棉从水到空气迁移过程中可能发生的形态变化，以及 ii）从标准化悬浮液中动员的空气中温石棉的数量。石棉纤维在水-空气迁移过程中发生形态改变，影响了电子显微镜的分析响应。水基石棉浓度高于 40 ∙ 10 f/L 会在空气中产生高于 1 纤维/升的浓度[f/L]，这是世界卫生组织设定的空气中石棉的警报阈值限制。观察到水中纤维浓度（以质量或每体积单位的纤维数量[μg/L 或 f/L]表示）之间可能存在相关性。
