Surface and bulk modifications of amphibole asbestos in mimicked gamble's solution at acidic PH

Abstract This study aimed at investigating the surface modifications occurring on amphibole asbestos (crocidolite and tremolite) during leaching in a mimicked Gamble’s solution at pH of 4.5 and T = 37 °C, from 1 h up to 720 h. Results showed that the fibre dissolution starts with the release of cati...

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Autores principales:	Alessandro Pacella, Paolo Ballirano, Marzia Fantauzzi, Antonella Rossi, Elisa Nardi, Giancarlo Capitani, Lorenzo Arrizza, Maria Rita Montereali
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b01f9d2525534f1a9a09b64cfcb3a4fd
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spelling	oai:doaj.org-article:b01f9d2525534f1a9a09b64cfcb3a4fd2021-12-02T16:24:50ZSurface and bulk modifications of amphibole asbestos in mimicked gamble's solution at acidic PH10.1038/s41598-021-93758-92045-2322https://doaj.org/article/b01f9d2525534f1a9a09b64cfcb3a4fd2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93758-9https://doaj.org/toc/2045-2322Abstract This study aimed at investigating the surface modifications occurring on amphibole asbestos (crocidolite and tremolite) during leaching in a mimicked Gamble’s solution at pH of 4.5 and T = 37 °C, from 1 h up to 720 h. Results showed that the fibre dissolution starts with the release of cations prevalently allocated at the various M- and (eventually) A-sites of the amphibole structure (incongruent dissolution). The amount of released silicon, normalized to fibre surface area, highlighted a leaching faster for the crocidolite sample, about twenty times higher than that of tremolite. Besides, the fast alteration of crocidolite promotes the occurrence of Fe centres in proximity of the fibre surface, or possibly even exposed, particularly in the form of Fe(II), of which the bulk is enriched with respect to the oxidized surface. Conversely, for tremolite fibres the very slow fibre dissolution prevents the underlying cations of the bulk to be exposed on the mineral surface, and the iron oxidation, faster than the leaching process, significantly depletes the surface Fe(II) centres initially present. Results of this work may contribute to unravel possible correlations between surface properties of amphibole asbestos and its long-term toxicity.Alessandro PacellaPaolo BalliranoMarzia FantauzziAntonella RossiElisa NardiGiancarlo CapitaniLorenzo ArrizzaMaria Rita MonterealiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alessandro Pacella Paolo Ballirano Marzia Fantauzzi Antonella Rossi Elisa Nardi Giancarlo Capitani Lorenzo Arrizza Maria Rita Montereali Surface and bulk modifications of amphibole asbestos in mimicked gamble's solution at acidic PH
description	Abstract This study aimed at investigating the surface modifications occurring on amphibole asbestos (crocidolite and tremolite) during leaching in a mimicked Gamble’s solution at pH of 4.5 and T = 37 °C, from 1 h up to 720 h. Results showed that the fibre dissolution starts with the release of cations prevalently allocated at the various M- and (eventually) A-sites of the amphibole structure (incongruent dissolution). The amount of released silicon, normalized to fibre surface area, highlighted a leaching faster for the crocidolite sample, about twenty times higher than that of tremolite. Besides, the fast alteration of crocidolite promotes the occurrence of Fe centres in proximity of the fibre surface, or possibly even exposed, particularly in the form of Fe(II), of which the bulk is enriched with respect to the oxidized surface. Conversely, for tremolite fibres the very slow fibre dissolution prevents the underlying cations of the bulk to be exposed on the mineral surface, and the iron oxidation, faster than the leaching process, significantly depletes the surface Fe(II) centres initially present. Results of this work may contribute to unravel possible correlations between surface properties of amphibole asbestos and its long-term toxicity.
format	article
author	Alessandro Pacella Paolo Ballirano Marzia Fantauzzi Antonella Rossi Elisa Nardi Giancarlo Capitani Lorenzo Arrizza Maria Rita Montereali
author_facet	Alessandro Pacella Paolo Ballirano Marzia Fantauzzi Antonella Rossi Elisa Nardi Giancarlo Capitani Lorenzo Arrizza Maria Rita Montereali
author_sort	Alessandro Pacella
title	Surface and bulk modifications of amphibole asbestos in mimicked gamble's solution at acidic PH
title_short	Surface and bulk modifications of amphibole asbestos in mimicked gamble's solution at acidic PH
title_full	Surface and bulk modifications of amphibole asbestos in mimicked gamble's solution at acidic PH
title_fullStr	Surface and bulk modifications of amphibole asbestos in mimicked gamble's solution at acidic PH
title_full_unstemmed	Surface and bulk modifications of amphibole asbestos in mimicked gamble's solution at acidic PH
title_sort	surface and bulk modifications of amphibole asbestos in mimicked gamble's solution at acidic ph
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b01f9d2525534f1a9a09b64cfcb3a4fd
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Surface and bulk modifications of amphibole asbestos in mimicked gamble's solution at acidic PH

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