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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Abstract
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 |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| 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: | 1385-8947 |
| 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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