Nanoparticle transport in saturated porous medium using magnetic resonance imaging

Lakshmanan, S., Holmes, W. M. , Sloan, W. T. and Phoenix, V. R. (2015) Nanoparticle transport in saturated porous medium using magnetic resonance imaging. Chemical Engineering Journal, 266, pp. 156-162. (doi: 10.1016/j.cej.2014.12.076)

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Transport study of nanoparticle (NP) through matrix flow dominated aquifer sand and soils have significant influence in natural systems. To quantify the transport behaviour, magnetic resonance imaging (MRI) was used to image the iron oxide based nanoparticle, Molday ION (carboxyl terminated) through saturated sandstone rock core. T2-weighted images were acquired and the changes in image intensity were calibrated to get a quantitative concentration profiles at various time intervals. These profiles were evaluated through CXTFIT transport model to estimate the transport parameters. These parameters are estimated at various points along the length of the column while classical breakthrough curve analysis cannot provide these details. NP–surface interactions were investigated using DLVO (Derjaguin–Landau–Verwey–Overbeek) theory. The dispersion coefficients (2.55–1.21 × 10−7 m2/s) were found to be decrease with distance, deposition rate constant k (6.70–9.13 × 10−4 (1/s)) and fast deposition rate constant kfast (4.32–8.79 × 10−2 (1/s)) were found to be increase with distance. These parameter variations over length will have a scaling up impact in developing transport models for environmental remediation and risk assessment schemes.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Sloan, Professor William and Holmes, Dr William and Phoenix, Dr Vernon and Lakshmanan, Mrs Susithra
Authors: Lakshmanan, S., Holmes, W. M., Sloan, W. T., and Phoenix, V. R.
College/School:College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
College of Science and Engineering > School of Engineering > Infrastructure and Environment
College of Science and Engineering > School of Geographical and Earth Sciences
Journal Name:Chemical Engineering Journal
Publisher:Elsevier B.V.
ISSN (Online):1873-3212
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Chemical Engineering Journal 266:156-162
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
491431Magnetic resonance imaging of biofilm mass transport processes with gadolinium tracersVernon PhoenixEngineering & Physical Sciences Research Council (EPSRC)EP/G028443/1SCHOOL OF GEOGRAPHICAL & EARTH SCIENCES
500721Opening the black box: imaging nanoparticle transport with magnetic resonance imagingVernon PhoenixNatural Environment Research Council (NERC)NE/G010269/1SCHOOL OF GEOGRAPHICAL & EARTH SCIENCES