ABSTRACT
This chapter discusses the uptake of organic substances from water and nonaqueous solutions. Most water supplies have at least some amount of organic matter present. Organic matter found in water supplies is usually acidic in nature and accordingly can be adsorbed by anion exchange resins. The sorption of phenol by weak base anion resins, based upon a styrene-divinylben-zene matrix, appears to proceed through two distinct mechanisms, depending upon the type and the ionic form of the ion exchange resin involved. Phenol can be removed effectively from nonaqueous media having low nonpolar characteristics using macroporous quaternary ammonium resins. The use of ion-exchange resins for the recovery of valuable organic substances from fermentation broths has been increasing in recent years. An interesting area of application involving the adsorption of organic substances is the purification of sugar bearing juices, liquors, and syrups. Ion-exchange resins are widely used to decolorize these solutions during some phase of their purification.
