The mechanism of iron binding processes in erionite fibres

Abstract Fibrous erionite-Na from Rome (Oregon, USA) was K-exchanged and characterized from the structural point of view. In addition, the modifications experienced after contact with a Fe(II) source were investigated for evaluating if the large potassium ions, blocking off nearly all the erionite c...

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Autores principales:	Alessandro Pacella, Carlo Cremisini, Elisa Nardi, Maria Rita Montereali, Ida Pettiti, Paolo Ballirano
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/69c3b6d7d09249129b90c56e0e3d741b
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spelling	oai:doaj.org-article:69c3b6d7d09249129b90c56e0e3d741b2021-12-02T12:32:03ZThe mechanism of iron binding processes in erionite fibres10.1038/s41598-017-01477-x2045-2322https://doaj.org/article/69c3b6d7d09249129b90c56e0e3d741b2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01477-xhttps://doaj.org/toc/2045-2322Abstract Fibrous erionite-Na from Rome (Oregon, USA) was K-exchanged and characterized from the structural point of view. In addition, the modifications experienced after contact with a Fe(II) source were investigated for evaluating if the large potassium ions, blocking off nearly all the erionite cavity openings, might prevent the Fe(II) binding process, which is currently assumed to be one of the reasons of the toxicity of erionite. The K-exchanged sample had a 95% reduction of the BET surface area indicating that it behaves as a mesoporous material. Exchanged K is segregated at K2 and at OW sites commonly occupied by H2O. The latter K cations provide a relevant contribution to the reduction of the surface area. Surprisingly, despite the collapse of its surface area the sample preserves the tendency to bind Fe(II). Therefore, yet in the case of a peculiar and potentially hostile structural environment the Fe(II) ion-exchange process has essentially the same kinetics observed in a typical erionite sample. This is a clear evidence of the very limited effect of the chemical composition of erionite on the Fe(II) binding process and reasonably it does not play a significant role in its toxicity.Alessandro PacellaCarlo CremisiniElisa NardiMaria Rita MonterealiIda PettitiPaolo BalliranoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alessandro Pacella Carlo Cremisini Elisa Nardi Maria Rita Montereali Ida Pettiti Paolo Ballirano The mechanism of iron binding processes in erionite fibres
description	Abstract Fibrous erionite-Na from Rome (Oregon, USA) was K-exchanged and characterized from the structural point of view. In addition, the modifications experienced after contact with a Fe(II) source were investigated for evaluating if the large potassium ions, blocking off nearly all the erionite cavity openings, might prevent the Fe(II) binding process, which is currently assumed to be one of the reasons of the toxicity of erionite. The K-exchanged sample had a 95% reduction of the BET surface area indicating that it behaves as a mesoporous material. Exchanged K is segregated at K2 and at OW sites commonly occupied by H2O. The latter K cations provide a relevant contribution to the reduction of the surface area. Surprisingly, despite the collapse of its surface area the sample preserves the tendency to bind Fe(II). Therefore, yet in the case of a peculiar and potentially hostile structural environment the Fe(II) ion-exchange process has essentially the same kinetics observed in a typical erionite sample. This is a clear evidence of the very limited effect of the chemical composition of erionite on the Fe(II) binding process and reasonably it does not play a significant role in its toxicity.
format	article
author	Alessandro Pacella Carlo Cremisini Elisa Nardi Maria Rita Montereali Ida Pettiti Paolo Ballirano
author_facet	Alessandro Pacella Carlo Cremisini Elisa Nardi Maria Rita Montereali Ida Pettiti Paolo Ballirano
author_sort	Alessandro Pacella
title	The mechanism of iron binding processes in erionite fibres
title_short	The mechanism of iron binding processes in erionite fibres
title_full	The mechanism of iron binding processes in erionite fibres
title_fullStr	The mechanism of iron binding processes in erionite fibres
title_full_unstemmed	The mechanism of iron binding processes in erionite fibres
title_sort	mechanism of iron binding processes in erionite fibres
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/69c3b6d7d09249129b90c56e0e3d741b
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The mechanism of iron binding processes in erionite fibres

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