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CONTAMINATION OF GROUNDWATER BY TRICHLOROETHYLENE AND OTHER VOLATILE HALOGENATED SOLVENTS REPRESENTS A SERIOUS THREAT TO THE NATION'S DRINKING WATER. CURRENT TREATMENT TECHNIQUES FOR CONTROLLING SUCH CONTAMINATION ARE LIMITED TO AERATION, ADSORPTION, AND LINKING. A PROMISING ALTERNATIVE IS PHOTOCHEMICAL OXIDATION, BUT THIS PROCESS IS AS YET UNOPTIMIZED, POORLY UNDERSTOOD, AND LARGELY LIMITED. PHOT ...

STABILIZATION OF HAZARDOUS WASTE SITES AND RADIOACTIVE URANIUM MILL TAILINGS REQUIRES THAT METHODS BE DEVELOPED TO PREVENT EROSION OF THE PROTECTIVE COVERING APPLIED AT EACH SITE TO CONTAIN THE WASTES. IN THE CASE OF URANIUM MILL TAILINGS A CLAY CAP UP TO SIX FEET THICK IS APPLIED TO PREVENT ESCAPE OF RADIOACTIVE RADON GAS. IN ARID AREAS WHERE VEGETATION IS DIFFICULT TO ESTABLISH, A ROCK MULCH OR ...

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A NOVEL PROCESS FOR FIXED-BED ADSORPTION USING ACTIVATED CARBON AND SOLVENT REGENERATION IS PROPOSED FOR INVESTIGATION. THE PROCESS OFFERS EASIER AND LESS COSTLY SOLVENT REGNERATION, REDUCED ADSORBER BED-LENGTH REQUIREMENTS, REDUCED CONCENTRATIONS OF ADSORBED WATER, AND LOWER PROCESS ENERGY REQUIREMENT AND CAPITAL AND OPERATING COSTS. THE PROCESS WILL HAVE APPLICATION TO THE RECOVERY OF SPECIFIC I ...

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RECENT PROMISING DEVELOPMENTS IN THE PETROLEUM INDUSTRY "PROFILE MODIFICATION TECHNOLOGY" (PMT) WILL BE EVALUATED FOR THEIR APPLICATION TO LEAKING LANDFILL SITES. PROFILE FLOW MODIFICATION TREATMENTS ARE USED TO INCREASE FLOW RESISTANCE IN HIGH PERMEABILITY AREAS FAR (75 FEET TO AS MUCH AS 1000 FEET) FROM THE INJECTION WELLBORE. THESE TREATMENTS CAN WITHSTAND FORMATION PRESSURES AND TEMPERATURES U ...