Award Data

This Phase I research is intended to evaluate the feasibility of manufacturing low-cost, acid-resistant sanitary sewer pipe from sulfur concrete. Sulfur is an abundant mineral recovered from coking, natural gas processing, and petroleum refining. Secondary recovery of sulfur, resulting from environmental regulation, produces more material than is needed by U.S. industry. The U.S. Bureau of Mines ...

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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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Prospective technologies for stationary post-combustion NOx control include: Selective Non-Catalytic Reduction (SNCR) and Selective Catalytic Reduction (SCR). These processes reduce NOx by non-catalytic or catalytic reactions with N-Agents (ammonia or urea). There are several problems with SCR, such as high capital cost, limited catalyst life, catalyst poisoning, and disposal. SNCR is less expe ...

MENT, WHICH IS THE STABILIZATION OF SLUDGES HOLDING ORGANIC POLLUTANTS. SUCH SLUDGES REQUIRE STABILIZATION FOR COMPLI- ANCE TO REGULATORY GUIDELINES FOR FINAL DISPOSAL IN A SECURELANDFILL. FOR THIS PURPOSE, PRESENT TECHNOLOGY IS NOT SUIT-ABLE BECAUSE HYDRAULIC FIXATIVES COMMONLY EMPLOYED FOR TOXICWASTES STABILIZATION ARE INCOMPATIBLE WITH ORGANIC POLLUTANTS. IT IS PREFERABLE TO ELIMINATE SLUDGES H ...

THE DISCIPLINE OF EXTERNAL-INITIATOR PRA ANALYSIS IS RELA- TIVELY LESS MATURE AND LESS RELIABLE THAN THE CORRESPONDING INTERNAL-INITIATORS PRA ANALYSIS. THESE RELATIVE WEAKNESSESHAVE MADE MANY DECISION-MAKERS, IN BOTH INDUSTRY AND THE NRCRELUCTANT TO USE EXTERNAL-INITIATOR PRA RESULTS. THE EXTER-NAL-INITIATOR ANALYSES HAVE BEEN CONSIDERED TOO UNCERTAIN, OR TOO CONSERVATIVE, OR SUPPORTED BY TOO LIT ...

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