PORTO @ 
Archivio Istituzionale della Ricerca
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishThe ability of bentonite-based barriers to act as semipermeable membranes that inhibit the passage of solutes (ions) is well documented. This behavior induces chemico-osmotic liquid flux that can improve the performance of such barriers by reducing solute mass flux. This paper explores the potential significance of chemico-osmosis on solute transport through bentonite membranes using a phenomenological transport framework combined with a physical model relating the macroscale transport properties (membrane efficiency coefficient, w, and hydraulic conductivity, kh) to the microscale physicochemical and fabric properties of the bentonite. The model was used to simulate the coupled transport of monovalent salt (KCl) through a geosynthetic clay liner. The results indicate that the influence of chemico-osmosis is dependent upon the void ratio of the bentonite and the extent to which clay platelets are aggregated to form tactoids. Chemico-osmosis is predicted to have an increasingly more significant impact on solute transport with increasing source concentration (Cs0), despite decreasing w with increasing Cs0.
Assessing the influence of chemico-osmosis on solute transport in bentonite membranes based on combined phenomenological and physical modeling / Malusis, Michael; Dominijanni, Andrea; Scalia, Joseph; Guarena, Nicolò; Sample-Lord, Kristin; Bohnhoff, Gretchen; Shackelford, Charles; Manassero, Mario. - In: JAPANESE GEOTECHNICAL SOCIETY SPECIAL PUBLICATION. - ISSN 2188-8027. - ELETTRONICO. - 9(2021), pp. 37-44. ((Intervento presentato al convegno Third International Symposium on Coupled Phenomena in Environmental Geotechnics tenutosi a Kyoto, Japan nel 20-21 October, 2021 [10.3208/jgssp.v09.cpeg023].
| Titolo: | Assessing the influence of chemico-osmosis on solute transport in bentonite membranes based on combined phenomenological and physical modeling | |
| Autori: | ||
| Data di pubblicazione: | 2021 | |
| Rivista: | ||
| Abstract: | The ability of bentonite-based barriers to act as semipermeable membranes that inhibit the passag...e of solutes (ions) is well documented. This behavior induces chemico-osmotic liquid flux that can improve the performance of such barriers by reducing solute mass flux. This paper explores the potential significance of chemico-osmosis on solute transport through bentonite membranes using a phenomenological transport framework combined with a physical model relating the macroscale transport properties (membrane efficiency coefficient, w, and hydraulic conductivity, kh) to the microscale physicochemical and fabric properties of the bentonite. The model was used to simulate the coupled transport of monovalent salt (KCl) through a geosynthetic clay liner. The results indicate that the influence of chemico-osmosis is dependent upon the void ratio of the bentonite and the extent to which clay platelets are aggregated to form tactoids. Chemico-osmosis is predicted to have an increasingly more significant impact on solute transport with increasing source concentration (Cs0), despite decreasing w with increasing Cs0. | |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| 9_v09.cpeg023.pdf | Articolo pubblicato | 2a Post-print versione editoriale / Version of Record | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
http://hdl.handle.net/11583/2954440
Copyright © 2022