Surfactant Enhanced Mobilization of Mineral Oil within Porous Media
作者： A. R. Duffield , R. S. Ramamurthy , J. R. Campanelli
关键词: Surface tension 、 Chemical engineering 、 Chemistry 、 Environmental remediation 、 Mineral oil 、 Porous medium 、 Volumetric flow rate 、 Pulmonary surfactant 、 Solubility 、 Environmental engineering 、 Capillary action
摘要: The remediation of non-aqueous phase liquids(NAPL) using conventional aquifer treatment technologies islimited by the low solubility NAPL. Surfactants can promotethe enhanced removal NAPL through mobilization, a mechanismthat relies on reduction interfacial tension (IFT) at theflushing solution / interface. conditions governingmobilization be represented total trapping number(NT), dimensionless quantity relating viscous and buoyancyforces to capillary forces residual. Column studies were conducted with dilute Triton X-100 solutionsdelivered Ottawa sand spiked light white mineraloil. At higher flow rate, surfactant solutions yieldedNT values greater than critical NT necessary toinitiate thereby promoting recovery asIFT dropped. While was not surpassed thelower variations in mineral oil duringflushing clearly indicate effect. surfactant-induced enhancement retardation lowerflow rate both highlight limitations approach. For systems where free product is present, totaltrapping number approach requires further refinement defineits applicability as an indicator for mobilization.
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