Sorption and chemical transformation of PAHs on coal fly ash

Technical Report · Wed Jan 01 04:00:00 EST 1992

DOI:https://doi.org/10.2172/6815920· OSTI ID:6815920

Mamantov, G; Wehry, E L

The objective of this research is to characterize the interactions of coal fly ash with polycyclic aromatic hydrocarbons (PAHs) and their derivatives, and to understand the influence of the surface properties of coal ash (and other atmospheric particles) on the chemical transformations of polycyclic aromatic compounds. During the past year the following specific aspects of this broad problem area have been investigated: (a) Fractionation of heterogeneous coal fly ash samples into different particle types varying in size and chemical composition (carbonaceous, mineral-magnetic, and mineral nonmagnetic); (b) The use of gas-solid chromatography to measure heats of sorption of PAHS, and PAH derivatives, on coal fly ashes and ash fractions. (c) Identification of the major photoproduct(s) of the photodecomposition of one PAH (benz[a]anthracene) sorbed on model adsorbents; (d) Estimation of fractal dimensions'' of coal fly ash particles by use of specific surface area measurements, with an ultimate objective of using these measurements to assess the importance of inner-filter effects'' on the photodecomposition of PAHs sorbed on fly ash particles. (e) The photochemical transformation of a representative nitro-PAH derivative (1-nitropyrene) sorbed on fly ash. (f) Development of techniques for studying the nonphotochemical reactions of hydroxyl radicals (and other atmospheric constituents) with PAHs sorbed on fly ash. Progress achieved, and problems encountered, in each of these major areas of emphasis is described below.

• Research Organization: Tennessee Univ., Knoxville, TN (United States). Dept. of Chemistry
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-91PC91306
• OSTI ID: 6815920
• Report Number(s): DOE/PC/91306-4; ON: DE93007480
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
ADSORPTION
ADSORPTION HEAT
AEROSOL WASTES
ALKYLATED AROMATICS
AROMATICS
ASHES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COAL
COMBUSTION PRODUCTS
DATA
DECOMPOSITION
DOCUMENT TYPES
ENERGY SOURCES
ENTHALPY
EXPERIMENTAL DATA
FLY ASH
FOSSIL FUELS
FUELS
HYDROCARBONS
INFORMATION
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PARTICLE SIZE
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PHYSICAL PROPERTIES
POLYCYCLIC AROMATIC HYDROCARBONS
PROGRESS REPORT
RESIDUES
SEPARATION PROCESSES
SIZE
SORPTION
SORPTIVE PROPERTIES
SURFACE AREA
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
TOLUENE
WASTES