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A NEW METHOD FOR REMOVING ACID RAIN PRECURSORS FROM COAL-FIRED BOILERS HAS BEEN CONCEIVED. THE CONCEPT INVOLVESA TAIL-END SCRUBBER RETROFIT FOR INSTALLATION IN PLANTS WHICH PRE-DATE THE 1970 CLEAN AIR ACT. THE CONCEPT IS HIGHLY INNOVATIVE AND HAS MANY ADVANTAGES OVER OTHER SORBENTINJECTION PROCESSES. HETEROGENEOUS REACTIONS BETWEEN SO2 AND CALCIUM-BASED SORBENTS ARE AFFECTED BY THE MASS TRANSFER B ...

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IN THE U.S. THERE ARE OVER 24,753 ACRES OF CONTAINER-GROWN NURSERY PLANTS. REPORTED ANNUAL RATES OF APPLICATION OF NITROGEN (N) FERTILIZER RANGE FROM 1036 TO 4730 POUNDS OF N PER ACRE. DETERMINATIONS OF THE ENVIRONMENTAL FATE OF THE APPLIED NITROGEN SHOWS THAT ONLY 5-8% OF THE APPLIED NITROGEN IS INCORPORATED INTO THE PLANT. THE U.S. ANNUAL PRODUCTION OF 24,753 ACRES OF CONTAINER-GROWN WOODY NURSE ...

COAL TAR IS A BY-PRODUCT OF THE COAL GASIFICATION PROCESS USED WIDELY BETWEEN 1820 AND 1950 TO PRODUCE A NATURAL GAS SUBSTITUTE. DURING THAT TIME, BILLIONS OF GALLONS OF TAR WERE PRODUCED AT MORE THAN 1500 GAS MANUFACTURING FACILITIESLOCATED THROUGHOUT THE U.S. A LARGE PORTION OF THIS WASTE TAR REMAINS IN STORAGE OR WAS DISPOSED OF BY INJECTION INTO SUBSURFACE SITES. COAL TAR IS A MIXTURE OF HYDRO ...

THE PROPOSED ANAEROBIC DIGESTION PROCESS IMPROVEMENT WILL PROVIDE A MEANS TO SEPARATE ANAEROBIC BACTERIA FROM THE DIGESTER SUPERNATANT AND RECYCLE THOSE BACTERIA TO THE ANAEROBIC REACTOR. THE PROCESS IMPROVEMENT WILL THUS ALLOW FOR THE MAINTENANCE OF HIGH CONCENTRATIONS OF ANAEROBIC BACTERIA WITHIN THE REACTOR. SOLIDS RETENTION TIMES ARE EXPECTED TO BE INCREASED SUBSTANTIALLY. AS A RESULT, THE HYD ...

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 ...

NEW IDEAS ARE PRESENTED ON THE COVALENT ATTACHMENT OF CHELATING FUNCTIONALITIES TO A COMMON, INEXPENSIVE SORBENT MATERIAL, WHICH CAN THEN COMPLEX HEAVY METAL IONS IRREVERSIBLY. THE EFFICIENT REMOVAL OF LEAD, CADMIUM, CHROMIUM, MERCURY, ZINC, NICKEL, COBALT, IRON, AND COPPER ISANTICIPATED. THE COVALENTLY ATTACHED LIGANDS ARE EXPECTED TO BE STABLE TOWARDS HYDROLYSIS AND PH VARIATIONS. THE CAPACITY O ...