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Composition and toxicity of solid-waste leachates from industrial coal gasifiers. [University of Minnesota - Duluth campus]

Conference ·
OSTI ID:5566820
;
Small coal gasifiers are being used increasingly by US industries to provide a low-Btu gas substitute for oil and natural gas. The leachate characteristics of gasification and gas clean-up solid wastes will in part determine the exact disposal practices. We report on the testing of bottom ash and cyclone separator char from a typical low-Btu industrial coal gasifier used for heating at the University of Minnesota-Duluth (UMD). Leachates were produced using both the US Environmental Protection Agency's Extraction Procedure (maintenance of pH 5 by the addition of acetic acid) and a distilled-water procedure (no pH adjustment). Chemical and ecotoxicological analysis of leachates of the solid wastes indicates that the materials would not be considered toxic-hazardous according to the current interpretation of the Resource Conservation and Recovery Act (RCRA) of 1976. Trace element concentrations in the UMD leachates are generally similar to those reported for other low-Btu gasifiers. Elemental concentrations in leachates from a variety of industrial and municipal solid wastes equal or exceed those in the UMD leachates. The industrial and municipal solid waste leachates are generally as toxic as or more toxic than the UMD leachates.
Research Organization:
Oak Ridge National Lab., TN (USA)
DOE Contract Number:
W-7405-ENG-26
OSTI ID:
5566820
Report Number(s):
CONF-811212-14; ON: DE82005195
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
010800* -- Coal
Lignite
& Peat-- Waste Management
ALKALINE EARTH METALS
ARSENIC
BARIUM
CADMIUM
CHEMICAL COMPOSITION
CHROMIUM
COAL GASIFICATION
COAL GASIFICATION PLANTS
DATA
DISPERSIONS
DISSOLUTION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
FUEL GAS
FUELS
FW-STOIC PROCESS
GAS FUELS
GASES
GASIFICATION
INDUSTRIAL PLANTS
INFORMATION
LEACHATES
LEACHING
LEAD
LOW BTU GAS
MERCURY
METALS
MIXTURES
NUMERICAL DATA
PURIFICATION
SELENIUM
SEMIMETALS
SEPARATION PROCESSES
SILVER
SOLID WASTES
SOLUTIONS
THERMOCHEMICAL PROCESSES
TOXICITY
TRACE AMOUNTS
TRANSITION ELEMENTS
WASTES