The flow of solutions of sodium alkybenzene sulphonate through porous media

摘要: Abstract The hydraulic conductivity of columns coarse sand, silica gel or soil aggregates has been found to be greatly reduced when water is followed by solutions a commercial detergent containing range homologues sodium alkylbenzene sulphonate (ABS c ). There was no reduction either pure C 12 ABS were used, quartz and , the temporary in case sand gel. concentration required reduce flow through 120–250 ppm. upper limit corresponded approximately measured critical micelle concentration. precipitated at lower calcium concentrations than some also more strongly absorbed. Gel filtration indicated that about 20% consisted higher . It suggested rate due partial blockage porous medium being derived from matrix ion exchange. With continued flow, exchangeable depleted started dissolve. Simultaneously increased, unless exchange itself had caused irreversible swelling matrix.