Feedback mechanisms between precipitation and dissolution reactions across randomly heterogeneous conductivity fields

<p>Our study investigates interplays between dissolution, precipitation, and transport processes taking place across randomly heterogeneous conductivity domains and the ensuing spatial distribution of preferential pathways. We do so by relying on a collection of computational analyses of react...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Y. Edery, M. Stolar, G. Porta, A. Guadagnini
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/553ee3ffc99a41fa9ed38531102d9c32
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:553ee3ffc99a41fa9ed38531102d9c32
record_format	dspace
spelling	oai:doaj.org-article:553ee3ffc99a41fa9ed38531102d9c322021-11-11T13:43:20ZFeedback mechanisms between precipitation and dissolution reactions across randomly heterogeneous conductivity fields10.5194/hess-25-5905-20211027-56061607-7938https://doaj.org/article/553ee3ffc99a41fa9ed38531102d9c322021-11-01T00:00:00Zhttps://hess.copernicus.org/articles/25/5905/2021/hess-25-5905-2021.pdfhttps://doaj.org/toc/1027-5606https://doaj.org/toc/1607-7938<p>Our study investigates interplays between dissolution, precipitation, and transport processes taking place across randomly heterogeneous conductivity domains and the ensuing spatial distribution of preferential pathways. We do so by relying on a collection of computational analyses of reactive transport performed in two-dimensional systems where the (natural) logarithm of conductivity is characterized by various degrees of spatial heterogeneity. Our results document that precipitation and dissolution jointly take place in the system, with the latter mainly occurring along preferential flow paths associated with the conductivity field and the former being observed at locations close to and clearly separated from these. High conductivity values associated with the preferential flow paths tend to further increase in time, giving rise to a self-sustained feedback between transport and reaction processes. The clear separation between regions where dissolution or precipitation takes place is imprinted onto the sample distributions of conductivity which tend to become visibly left skewed with time (with the appearance of a bimodal behavior at some times). The link between conductivity changes and reaction-driven processes promotes the emergence of non-Fickian effective transport features. The latter can be captured through a continuous-time random-walk model where solute travel times are approximated with a truncated power law probability distribution. The parameters of such a model shift towards values associated with increasingly high non-Fickian effective transport behavior as time progresses.</p>Y. EderyM. StolarG. PortaA. GuadagniniCopernicus PublicationsarticleTechnologyTEnvironmental technology. Sanitary engineeringTD1-1066Geography. Anthropology. RecreationGEnvironmental sciencesGE1-350ENHydrology and Earth System Sciences, Vol 25, Pp 5905-5915 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350
spellingShingle	Technology T Environmental technology. Sanitary engineering TD1-1066 Geography. Anthropology. Recreation G Environmental sciences GE1-350 Y. Edery M. Stolar G. Porta A. Guadagnini Feedback mechanisms between precipitation and dissolution reactions across randomly heterogeneous conductivity fields
description	<p>Our study investigates interplays between dissolution, precipitation, and transport processes taking place across randomly heterogeneous conductivity domains and the ensuing spatial distribution of preferential pathways. We do so by relying on a collection of computational analyses of reactive transport performed in two-dimensional systems where the (natural) logarithm of conductivity is characterized by various degrees of spatial heterogeneity. Our results document that precipitation and dissolution jointly take place in the system, with the latter mainly occurring along preferential flow paths associated with the conductivity field and the former being observed at locations close to and clearly separated from these. High conductivity values associated with the preferential flow paths tend to further increase in time, giving rise to a self-sustained feedback between transport and reaction processes. The clear separation between regions where dissolution or precipitation takes place is imprinted onto the sample distributions of conductivity which tend to become visibly left skewed with time (with the appearance of a bimodal behavior at some times). The link between conductivity changes and reaction-driven processes promotes the emergence of non-Fickian effective transport features. The latter can be captured through a continuous-time random-walk model where solute travel times are approximated with a truncated power law probability distribution. The parameters of such a model shift towards values associated with increasingly high non-Fickian effective transport behavior as time progresses.</p>
format	article
author	Y. Edery M. Stolar G. Porta A. Guadagnini
author_facet	Y. Edery M. Stolar G. Porta A. Guadagnini
author_sort	Y. Edery
title	Feedback mechanisms between precipitation and dissolution reactions across randomly heterogeneous conductivity fields
title_short	Feedback mechanisms between precipitation and dissolution reactions across randomly heterogeneous conductivity fields
title_full	Feedback mechanisms between precipitation and dissolution reactions across randomly heterogeneous conductivity fields
title_fullStr	Feedback mechanisms between precipitation and dissolution reactions across randomly heterogeneous conductivity fields
title_full_unstemmed	Feedback mechanisms between precipitation and dissolution reactions across randomly heterogeneous conductivity fields
title_sort	feedback mechanisms between precipitation and dissolution reactions across randomly heterogeneous conductivity fields
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/553ee3ffc99a41fa9ed38531102d9c32
work_keys_str_mv	AT yedery feedbackmechanismsbetweenprecipitationanddissolutionreactionsacrossrandomlyheterogeneousconductivityfields AT mstolar feedbackmechanismsbetweenprecipitationanddissolutionreactionsacrossrandomlyheterogeneousconductivityfields AT gporta feedbackmechanismsbetweenprecipitationanddissolutionreactionsacrossrandomlyheterogeneousconductivityfields AT aguadagnini feedbackmechanismsbetweenprecipitationanddissolutionreactionsacrossrandomlyheterogeneousconductivityfields
_version_	1718439036597567488

Feedback mechanisms between precipitation and dissolution reactions across randomly heterogeneous conductivity fields

Ejemplares similares