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- W92254314 abstract "Both the electric power industry and the synthetic fuel industry face the need to dispose of increasingly large amounts of coal residues over the coming years. One potential problem is contamination of surfacewater and groundwater by trace elements as a result of leaching of residues. This study is centered on the effects of combustion parameters on chemical affiliation of trace elements in coal ash, as determined by successive fractionation extractions. The results indicate that combustion temperatures and the operating temperatures of emission control devices are significant controlling parameters affecting the percentage distribution of trace elements in coal ash. In most cases, for different coals burned in the same combustion unit under similar operating conditions, the percentage distributions of most chemical species were similar. Conversely, for different coals burned under different combustion conditions, no definitive distribution pattern of trace elements was indicated. Incomplete combustion may result in higher concentrations of leachable trace elements in coal ash. Coal with a lower heat content yields more leachable trace elements, possibly because of lower combustion temperatures inside the furnace. It was also found that for conventional combustion operations, hopper ash has a higher potential for leaching trace elements than bottom ash. The reverse ismore » true for fluidized-bed combustion ash.« less" @default.
- W92254314 created "2016-06-24" @default.
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- W92254314 date "1987-06-01" @default.
- W92254314 modified "2023-09-27" @default.
- W92254314 title "Chemical form and leachability of inorganic trace elements in coal ash: Final report" @default.
- W92254314 hasPublicationYear "1987" @default.
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