title: Continuous wave MRI diffusion study of water in bentonite clay.
abstract: Three-layered clay minerals such as montmorillonite (bentonite) exhibit very short transverse relaxation times. This is especially true for samples with relatively low water contents in the region of 20% to 30%, which is the water content typically used in environmental technology applications (e.g., as a mineral liner material for landfills). The diffusion of water in samples with such short transverse relaxation times can be measured with NMR by observing the moisture gradients or isotope tracer fronts propagating through appropriately prepared samples by means of continuous wave MRI. The first results from such studies on bentonite clays are presented in this paper.
authors.affiliation: Department of Bio-Medical Physics and Bio-Engineering, University of Aberdeen, Foresterhill, AB25 2ZD Aberdeen, UK.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Fagan
authors.forename: Nikolaus
authors.initials: N
authors.lastname: Nestle
authors.forename: David J
authors.initials: DJ
authors.lastname: Lurie
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry; D001546:Bentonite / Q000737:chemistry*; D000077215:Clay; D004058:Diffusion; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D014867:Water
chemical_list: D000538:Aluminum Silicates; D014867:Water; D001546:Bentonite; D000077215:Clay