Award Data

SOIL WASHING OR FLUSHING HAS BEEN SHOWN TO BE AN EFFECTIVE METHOD FOR REMOVING HEAVY METALS FROM METAL-CONTAMINATED SOILS AT SUPERFUND SITES. SANDY SOILS CAN OFTEN BE WASHED WITH WATER TO MOBILIZE METAL IONS IN AN AQUEOUS PHASE, BUT FOR CLAY SOILS OR SOILS WHICH CONTAIN INSOLUBLE METAL COMPOUNDS, E.G., LEAD SULFATE, OTHER ADDITIVES SUCH AS CHELATING AGENTS (EDTA) ARE USED TO EFFECT TRANSFER OF MET ...

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SLUDGE WASTE CONTAINING CR(VI) FROM CHROMIUM PLATING OPERATIONS IS CLASSIFIED AS HAZARDOUS AND ITS DISPOSAL IS A MAJOR CONCERN. IT CAN BE RECOVERED FOR FUTURE METAL USE IN REMELTING OPERATIONS, CAN BE STORED, OR CAN BE DISPOSED AFTER MODIFICATION TO A LEGALLY ACCEPTABLE FORM. IN PHASE I, THE CONVERSION OF SLUDGE WASTE FROM CHROMIUM PLATING OPERATIONS INTO FERROCHROMIUM ALLOYS IS PROPOSED. BY MEANS ...

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THE CHLORINE CONTENT OF CARBONACEOUS CHAR DERIVED FROM THE PYROLYTIC CONVERSION OF REFUSE-DERIVED FUEL (RDF) IS HIGHER THAN THAT OF CONVENTIONAL COAL. THE PROPOSED RESEARCH WILL DETERMINE IF THIS CHLORINE CAN BE "CAPTURE" DURING THE PYROLYTIC CONVERSION BY THE ADDITION OFCA(OH)2 OR NAOH, AND THE EXTENT TO WHICH IT CAN BE "CAPTUREDTHE RESEARCH WILL IDENTIFY THE RELATIONSHIP BETWEEN THE AMOUNT OF CH ...

TRICHLOROETHYLENE (TCE) IS A WIDESPREAD POLLUTANT AND IS REPORTED TO BE THE MOST FREQUENTLY ENCOUNTERED CONTAMINANT AT HAZARDOUS WASTE SITES. ALL PREVIOUS ATTEMPTS AT IN SITU BIOREMEDIATION HAVE USED A PROCESS WHERE METHANTROPHIC BACTERIA WERE STIMULATED BY THE SUBSURFACE DELIVERY OF AIR AND METHANE RESULTING IN A "FORTUITOUS" COMETABOLISM OF TCE. THIS PROCESS AT ONE TIME APPEARED PROMISING FOR TH ...

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BACTERIA INDUCE MANY OF THE PROBLEMS ASSOCIATED WITH PUBLIC PROBLEMS ASSOCIATED WITH WATER BORNE PATHOGENS. IN ADDITIONTASTE, ODOR, COLOR AND TURBIDITY PROBLEMS ARE SOMETIMES CAUSED BY BACTERIAL, FOULING AND CORROSION ARE ALSO CAUSED BY BACTERIA. FOULED WATER SYSTEM COMPONENTS PROMOTE DEVELOPMENT OF PROTECTED OR SHIELDED CONSORTIA OF BACTERIA WHICH DECREASES THE EFFGECTIVENESS OF CHLORINE (OR OTHE ...

Chlorinated hydrocarbons represent the most prevalent contaminants of groundwater in the country. When released in the subsurface, they tend to persist below the water table, and it can take decades or centuries before slow-moving groundwater completely dissolves accumulations of chlorinated solvent product. Analytical methods currently available for monitoring these compounds require extensive ...