Carbonaceous Particles in Coal Combustion Stack Ash and Their Interaction with Polycyclic Aromatic Hydrocarbons

摘要

Carbonaceous particles consisting of uncombusted coal, coal coke, and intermediates are concentrated in the large particle size fractions (> 14 mu m) of stack ash. Although they do not constitute a major portion of the ash, they appear to contribute significantly to the interaction of fly ash with organic matter. The carbonaceous particle-enriched fractions are more sorptive, have higher levels of organic matter, and exhibit higher specific surface areas than mineral or magnetic particle-enriched subfractions. Extraction recoveries of organics from fly ash appear to be limited mainly by the carbonaceous particles. (ERA citation 09:005697)