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 ∙ 10^6 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.

Chrysotile asbestos migration in air from contaminated water: An experimental simulation

Chiara Avataneo
First
;
Jasmine R. Petriglieri;Silvana Capella;Maura Tomatis;Manuela Lasagna;Domenico A. De Luca;Elena Belluso;Francesco Turci
Last
2022

Abstract

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 ∙ 10^6 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.
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https://www.sciencedirect.com/science/article/pii/S0304389421024961?via=ihub
Naturally occurring asbestos; Migration; Simulation test; Environmental fate; Balangero
Chiara Avataneo, Jasmine R. Petriglieri, Silvana Capella, Maura Tomatis, Mariagrazia Luiso, Giuliana Marangoni, Elisa Lazzari, Silvio Tinazzi, Manuela Lasagna, Domenico A. De Luca, Massimo Bergamini, Elena Belluso, Francesco Turci
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1817296
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