A prototype system was designed and developed to slurry buoyant activated carbon into a static body of water. The process was developed to remove spilled soluable hazardous compounds from a watercourse. In a simulated spill, up to 98% removal of Diazinon, an organophosphorus pesticide, was achieved by adsorption on activated carbon and by dispersion of the spilled material. The basic system was barge-mounted with an intake pump, a jet-slurrier, a surge tank, and a slurry pump. The buoyant carbon was fed into the slurrier by gravity from a floating, hopper-bottom tote bin. Since no acceptable buoyant activated carbon is commercially produced in the United States at this time, a method of making buoyant activated carbon by using microballoons and a carbon coating mix was developed. Estimated cost per pound of media was $3.50 on a small-batch basis.

"May 1980." Includes bibliographical references (page 36). Prepared by Battelle Pacific Northwest Laboratories for U.S. Environmental Protection Agency, Office of Research and Development, Industrial Environmental Research Laboratory, Cincinnati, Ohio, under contract no. Contract Number: 68-03-2204.