Nanoparticle transport in saturated porous medium using magnetic resonance imaging

Susithra Lakshmanan, William M. Holmes, William T. Sloan, Vernon R. Phoenix

Research output: Contribution to journalArticle

10 Citations (Scopus)

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 (2.55-1.21×10-7m2/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.

LanguageEnglish
Pages156-162
Number of pages7
JournalChemical Engineering Journal
Volume266
Early online date29 Dec 2014
DOIs
Publication statusPublished - 15 Apr 2015

Fingerprint

Magnetic resonance
Porous materials
porous medium
Nanoparticles
Deposition rates
Imaging techniques
Rate constants
breakthrough curve
Sandstone
Aquifers
Iron oxides
Risk assessment
iron oxide
remediation
risk assessment
Sand
Rocks
sandstone
aquifer
Soils

Keywords

  • CXTFIT model
  • environment
  • magnetic resonance imaging
  • nanoparticle transport
  • porous media

Cite this

Lakshmanan, Susithra ; Holmes, William M. ; Sloan, William T. ; Phoenix, Vernon R. / Nanoparticle transport in saturated porous medium using magnetic resonance imaging. In: Chemical Engineering Journal. 2015 ; Vol. 266. pp. 156-162.
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Nanoparticle transport in saturated porous medium using magnetic resonance imaging. / Lakshmanan, Susithra; Holmes, William M.; Sloan, William T.; Phoenix, Vernon R.

In: Chemical Engineering Journal, Vol. 266, 15.04.2015, p. 156-162.

Research output: Contribution to journalArticle

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