Ideality of Clay Membranes in Osmotic Processes: A Review

摘要: Clays can act as osmotic membranes and thus give rise to osmotically induced hydrostatic pressures. The magnitude of generated pressures in geologic systems is governed by the theoretical pressure calculated solely from solution properties value membrane's three phe- nomenological coefficients: hydraulic permeability coefficient, Lv; reflection tr; solute 60. Generally, low values Lp correspond highly compacted which ~ near unity r approaches zero. Such membrane should initially high fluxes gradual dissipation their potentials. fluid Dunbarton Triassic basin, South Carolina, are a good example A unique cell created juxtaposition fresh water overlying Cretaceous sediments against saline pore housed within membrane-functioning basin. Because wells penetrating core basin show anomalously heads relative margins, longevity this probably dictated rate at salt diffuses out into aquifer.