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Abstract
In surfactant-enhanced carbon regeneration, a concentrated surfactant solution is passed over spent activated carbon to desorb the solutes in an in-sttu process. The solutes solubilize into micelles in the regenerate solution. Residual adsorbed surfactant can be removed by a water flush. In this study, phenol is the solute and sodium dodecyl sulfate is the anionic surfactant used. Previous studies have measured the ability of the regenerate to remove the solute from the carbon. This study presents the breakthrough curves for subsequent adsorption cycles following the regeneration. The reduction of the effective carbon adsorption capacity is less if a higher regenerate concentration of surfactant, more pore volumes of regenerate, or more pore volumes of water flush solution are used. Effective adsorption capacities of over 50% of that on. virgin carbon were observed on regenerated carbon.
Notes
L. Hemphill, Thermal Regeneration of Activated Carbon, Environmental Protection Agency, Office of Research and Development, Springfield, Ohio, 1978.