Sorption of Organic Contaminants by Fly Ash in a Single Solute System

摘要

A treatment process is developed using fly ash as a sorbent material to isolate/immobilize organic contaminants from aqueous solution. Batch as well as dynamic studies were conducted during the investigation. The results of this research demonstrate that fly ash has a significant capacity for adsorption of organic compounds from the aqueous solution. The carbon content of fly ash plays a significant role during the sorption process. A significant correlation was observed between the Freundlich sorption capacity parameter and various properties of the organic contaminantsuch as molar volume, parachor,octanol-water partition coefficient, and electronic polariz-ability. The sorption of organic compounds onto fly ash is believed to occur principally via the weak induction forces of London or dispersion forces, which are characteristic of the physical adsorption process.