Award Data

This Phase I project involves the development of a portable system for the analysis of trace metals in aqueous solutions based on an innovative disposable multi-element nanoband electrode sensor. The system will be capable of real-time detection of a variety of heavy metals in aqueous solutions, including Zn, Cd, Pb, Cr, Cu, and Hg with a 100 ppb detection limit. The system also will be capable ...

WASTE PICKLING LIQUOR IS PRODUCED WHIN ACID IS USED TO RE- MOVED SCALE FROM STEEL PRODUCTS. TYPICALLY IT CONTAINS 10% ACID AND 5% IRON IN THE FORM OF THE FERROUS SALT OF THE ACIDUSED. IT IS PRODUCED IN LARGE QUANTITIES. ITS DISPOSAL IS DIFFICULT AND WILL BECOME MORE SO WHEN THE PLANNED TOTAL BANON ON DEPOSITION OF LIQUIDS IN A LAND DISPOSAL SITES BECOMES EFFECTIVE. AN ELECTROLYTIC PROCESS WILL BE ...

THE CONTAINMENT OF TOXIC MATERIALS ALREADY BURIED IN THE GROUND AND THE CONSTRUCTION OF NEW DISPOSAL SITES ARE DIFFI-CULT TASKS. IN BOTH CASES THERE IS A NEED FOR VERTICAL AND HORIZONTAL BARRIER WALLS IN THE GROUND THAT ARE KNOWN TO BE DIFFICULT AND EXPENSIVE TO CONSTRUCT WITH CURRENTLY-AVAILA- BLE TECHNOLOGIES. FLUIDYNE PROPOSES TO CONSTRUCT SUCH BARRIER WALLS WITH A NOVEL ONE-STEP PROCESS THT IN ...

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 ...

IN SEPTEMBER OF 1990, A SUBMERSIBLE MIXER WAS INSTALLED IN THE OXIDATION DITCH AT THE GRAND COULEE, WASHINGTON, WASTEWATER TREATMENT FACILITIES. THIS MIXER MAKES IT POSSIBLE TO MAINTAIN MIXING WITH THE BRUSH ROTOR AERATORS OFF, THEREBY CREATING ANOXIC CONDITIONS IN THE DITCH. THE POTENTIAL ADVANTAGES OF THIS PROCESS MODIFICATION INCLUDE ENHANCED NUTRIENT REMOVAL, FILAMENTOUS SLUDGE BULKING CONTROL ...

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This Phase I project involves the development of a phytoremediation technology for the cleanup of TNT-contaminated soils at the Volunteer Army Ammunition Plant (VAAP) in Chattanooga, TN (an upland site). Phytoremediation, the use of plants to clean up contaminated environments, has a great potential for soils contaminated with TNT. Recent discoveries suggest that intrinsic plant enzymes (not micr ...

SELECTIVE NO REDUCTION TECHNIQUES INVOLVING THE INJECTION OFNITROGEN-CONTAINING COMPOUNDS, SUCH AS AMMONIA, TO COMBUSTION PRODUCTS OVER A RELATIVELY NARROW TEMPERATURE RANGE HAVE BEEN USED FOR SOME TIME. SYSTEMS HAVE BEEN INSTALLED ON GAS-, OIL-, AND COAL-FIRED BOILERS, ON PROCESS HEATERS, AND ON MUNICIPAL WASTE INCINERATORS. HOWEVER, THESE SYSTEMS ARE LIMITED IN THEIR CONTROL EFFECTIVENESS. THERM ...