ADSORPTION OF PHENOL AND NA-P-OCTYLBENZENE SULFONATE FROM AQUEOUS-SOLUTION ON ACTIVATED CARBON

The adsorption of phenol from aqueous solution onto activated carbon h as been measured at 15, 25 and 35 degrees C under influence of Na-p-oc tylbenzenesulfonate in the premicellar and the micellar region. The ad sorption isotherms to be obtained are exhibiting stages and maxima. Th e stages of the adsorption isotherms could be confirmed by calorimetri c measurement of the concentration function of the heat of exchange. T he osmotic coefficient of the surfactant in the bulk phase was measure d by vapour pressure osmometry. The aggregation number and the degree of counterion binding were determined as a requirement of the modellin g of the micellar behaviour. The aim of the investigation is the devel opment of a model, which includes all these experimental results refle cting the interactions of micellar systems both in the bulk and in the adsorption phase.