Use of solid waste for chemical stabilization: Adsorption isotherms and {sup 13}C solid-state NMR study of hazardous organic compounds sorbed on coal fly ash
Adsorption of hazardous organic compounds on the Dave Johnston plant fly ash is described. Fly ash from Dave Johnston and Laramie River power plants were characterized using elemental, x-ray, and {sup 29}Si NMR; the Dave Johnston (DJ) fly ash had higher quartz contents, while the Laramie River fly ash had more monomeric silicate anions. Adsorption data for hydroaromatics and chlorobenzenes indicate that the adsorption capacity of DJ coal fly ash is much less than that of activated carbon by a factor of >3000; but it is needed to confirm that solid-gas and solid-liquid equilibrium isotherms can indeed be compared. However, for pyridine, pentachlorophenol, naphthalene, and 1,1,2,2-tetrachloroethane, the DJ fly ash appears to adsorb these compounds nearly as well as activated carbon. {sup 13}C NMR was used to study the adsorption of hazardous org. cpds on coal fly ash; the nuclear spin relaxation times often were very long, resulting in long experimental times to obtain a spectrum. Using a jumbo probe, low concentrations of some hazardous org. cpds could be detected; for pentachlorophenol adsorbed onto fly ash, the chemical shift of the phenolic carbon was changed. Use of NMR to study the adsorption needs further study.
- Research Organization:
- University of Wyoming Research Corp., Laramie, WY (United States). Western Research Inst.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FC21-86MC11076
- OSTI ID:
- 10123623
- Report Number(s):
- DOE/MC/11076--3623; ON: DE94000092; BR: 400403000/AA0520000
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200200
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320604
ADSORPTION
ADSORPTION ISOTHERMS
AROMATICS
CHEMICAL ANALYSIS
CHLORINATED AROMATIC HYDROCARBONS
COAL
FLY ASH
FOSSIL-FUEL POWER PLANTS
HAZARDOUS MATERIALS
MUNICIPAL WASTE MANAGEMENT
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
PYRIDINE
SORPTIVE PROPERTIES
WASTE MANAGEMENT
WASTE PRODUCT UTILIZATION