title: MRI study of non-aqueous phase liquid extraction from porous media.
abstract: Magnetic resonance imaging is used to investigate, at the pore scale, the dissolution and mobilisation of discrete non-aqueous phase liquid (octanol) ganglia trapped within porous media by capillary forces, by a mobile aqueous phase. Dissolution is observed to be described by a mass-transfer limited model. Mobilisation of entrapped ganglia commences at lower flowrates when a surfactant is introduced into the mobile aqueous phase.
authors.affiliation: Department of Chemical Engineering, University of Cambridge, UK.
authors.forename: M L
authors.initials: ML
authors.lastname: Johns
authors.forename: L F
authors.initials: LF
authors.lastname: Gladden
mesh_terms: D020003:1-Octanol / Q000302:isolation & purification*; D006801:Humans; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D016062:Porosity; D012212:Rheology; D012996:Solutions; D013501:Surface-Active Agents
chemical_list: D012996:Solutions; D013501:Surface-Active Agents; D020003:1-Octanol