NDLI: Low-head hyperfiltration through Jurassic-Cretaceous metamorphic Darrington Phyllite discs (from the Northwest Cascades of Washington State, USA)

Please wait, while we are loading the content...

Low-head hyperfiltration through Jurassic-Cretaceous metamorphic Darrington Phyllite discs (from the Northwest Cascades of Washington State, USA)

Content Provider	Springer Nature Link
Author	Hart, Megan
Copyright Year	2012
Abstract	Membrane behavior in naturally occurring and engineering systems refers to the restriction of solute migration through a membrane relative to the migration of the solvent. Hyperfiltration is the net flux that results when two solutions of different concentration are separated by a membrane and an external force is applied in excess of the osmotic pressure. Clay membranes containing layered fabric have higher efficiencies than membranes with random fabrics. Therefore, low-permeability rocks with a foliated fabric might exhibit membrane properties. Four hyperfiltration experiments were conducted on samples of Darrington Phyllite from the Easton Metamorphic Suite of the Northwest Cascades, Washington (USA). Chloride solutions were passed through thin, intact discs at relatively low heads. At the end of the experiments, dissolved chloride concentrations had increased 110–140 % and calculated reflection coefficients ranged from 0.87 to 0.88; this was attributed to partial solute rejection by the phyllite. Natural scenarios in which phyllite might exhibit membrane properties include (1) shallow perched aquifers bounded by phyllite, (2) overpressured aquifers bounded by phyllite, (3) phyllite-bounded aquifers with significant vertical groundwater flows, and (4) ultrafiltration during metamorphic devolatilization at depth. Membrane processes exhibited by phyllite may also contribute to the formation of some low-temperature ore bodies.Un comportement de type membrane dans des systèmes naturels ou artificiels correspond à la limitation de la migration d’un soluté par rapport à celle du solvant à travers une membrane. L’hyperfiltration est le flux net qui se produit lorsque deux solutions de concentrations différentes sont séparées par une membrane et qu’une force extérieure supérieure à la pression osmotique est appliquée. Les membranes argileuses à texture stratifiée ont une meilleure efficacité que les membranes à texture non orientée. Par conséquent, des roches de faible perméabilité à texture foliée pourraient présenter des propriétés de membranes. Quatre expériences d’hyperfiltration ont été réalisées sur des échantillons de la phyllite de Darrington du complexe métamorphique des Cascades du Nord-Ouest, Etat de Washington (USA). Des solutions de chlorure ont été passées à travers de fins disques intacts sous des charges hydrauliques relativement faibles. A la fin des expériences, les concentrations en chlorure dissous avaient augmenté de 110–140 % et les coefficients de réflexion calculés étaient de 0.87 à 0.88; ceci a été attribué à un rejet partiel du soluté par la phyllite. Les scénarios naturels dans le cadre desquels une phyllite pourrait présenter des propriétés de membrane sont les suivants (1) des aquifères superficiels perchés limités par une phyllite, (2) des aquifères en surpression limités par une phyllite, (3) des aquifères limités par une phyllite avec des écoulements verticaux d’eau souterraine importants et (4) de l’ultrafiltration en profondeur au cours de la déshydratation métamorphique. Les processus membranaires présentés par la phyllite pourraient aussi contribuer à la formation de certains corps minéralisés à basse température.El comportamiento de una membrana en sistemas que ocurren en la naturaleza o ingenieriles refiere a la restricción de la migración de un soluto a través de una membrana en relación con la migración del solvente. La hiperfiltración es el flujo neto que resulta cuando dos soluciones de diferente concentración son separadas por una membrana y se aplica una fuerza externa que excede la presión osmótica. Las membranas de arcillas que contienen estructuras en capas tienen una mayor eficiencia que las membranas con estructuras aleatorias. Por lo tanto, las rocas de baja permeabilidad con una estructura foliada deberían exhibir propiedades características de membrana. Se realizaron cuatro experimentos de infiltración sobre muestras de Darrington Phyllite del Easton Metamorphic Suite de las Cascadas Noroccidentales, Washington (EEUU). Las soluciones de cloruros fueron pasadas a través de discos delgados, intactos a cargas hidráulicas relativamente bajas. Al final de los experimentos las concentraciones de cloruro disuelto se incrementaron en 110–140 % y los coeficientes de reflexión calculados oscilaron de 0.87 a 0.88; esto fue atribuido al rechazo parcial del soluto por la filita. Los escenarios naturales en los cuales la filita puede exhibir propiedades características de las membranas incluyen (1) acuíferos someros colgados rodeados por filitas (2) acuíferos sobre presión limitados por filitas, (3) acuíferos limitados por filitas con flujos verticales de agua subterránea significativos, y (4) ultrafiltración durante la desvolatización metamórfica en profundidad. Los procesos propios de membranas exhibidos por la filitas pueden también contribuir a la formación de algunos cuerpos de minerales a baja temperatura.O comportamento das membranas em sistemas naturais e de engenharia refere-se à restrição da migração de solutos através de uma membrana relativamente à migração do solvente. Hiperfiltração corresponde ao fluxo bruto que resulta quando duas soluções com diferentes concentrações são separadas por uma membrana e uma força externa é aplicada em excesso em relação à pressão osmótica. Membranas de argila contendo camadas sobrepostas têm eficiências superiores às membranas com fabrics aleatórios. Então, rochas de permeabilidade baixa com composição foliada podem exibir propriedades de membrana. Foram realizadas quatro experiências de hiperfiltração sobre amostras do Filito de Darrington, da Sequência Metamórfica de Easton, das Cascades Noroeste, Washington (EUA). Soluções de cloreto foram passadas através de discos finos intactos, a pressões hidráulicas relativamente baixas. No final das experiências, as concentrações de cloretos dissolvidos incrementaram 110–140 % e os coeficientes de refleção calculados variaram entre os 0.87 e os 0.88; isto foi atribuído à rejeição parcial de soluto pelo filito. Cenários naturais nos quais o filito pode exibir propriedades de membrana incluem (1) aquíferos suspensos subsuperficiais rodeados por filito, (2) aquíferos sob pressão rodeados por filito, (3) aquíferos rodeados de filito com fluxos verticais significativos, e (4) ultrafiltração durante devolatilização metamórfica em profundidade. Os processos de membrana exibidos pelo filito podem também contribuir para a formação de alguns corpos mineralizados de baixa temperatura.
Starting Page	481
Ending Page	489
Page Count	9
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	21
Issue Number	2
e-ISSN	14350157
Language	Portuguese
Publisher	Springer-Verlag
Publisher Date	2012-10-10
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Diffusion Membrane Hyperfiltration Laboratory experiments/measurements USA Hydrogeology Geology Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Translation of field tracer-test results into bounding predictions of matrix diffusion in the shallow subsurface at Idaho National Laboratory, USA

Erratum: Translation of field tracer-test results into bounding predictions of matrix diffusion in the shallow subsurface at Idaho National Laboratory, USA

The complex future of hydrogeology

Evaluation of the effects of the radial constant-head boundary in slug tests

Hydrogeology of the vicinity of Homestake mine, South Dakota, USA

A laboratory study of tracer tomography

Transport of bacteria in aquifer sediment: experiments and modeling

Baseflow recession analysis in the inland Pacific Northwest of the United States

Impacts of agricultural irrigation recharge on groundwater quality in a basalt aquifer system (Washington, USA): a multi-tracer approach

Low-head hyperfiltration through Jurassic-Cretaceous metamorphic Darrington Phyllite discs (from the Northwest Cascades of Washington State, USA)

Similar Documents

Translation of field tracer-test results into bounding predictions of matrix diffusion in the shallow subsurface at Idaho National Laboratory, USA

Erratum: Translation of field tracer-test results into bounding predictions of matrix diffusion in the shallow subsurface at Idaho National Laboratory, USA

The complex future of hydrogeology

Evaluation of the effects of the radial constant-head boundary in slug tests

Hydrogeology of the vicinity of Homestake mine, South Dakota, USA

A laboratory study of tracer tomography

Transport of bacteria in aquifer sediment: experiments and modeling

Baseflow recession analysis in the inland Pacific Northwest of the United States

Impacts of agricultural irrigation recharge on groundwater quality in a basalt aquifer system (Washington, USA): a multi-tracer approach

Low-head hyperfiltration through Jurassic-Cretaceous metamorphic Darrington Phyllite discs (from the Northwest Cascades of Washington State, USA)