Geology Reference
In-Depth Information
µ
g/g
16 EPAPAH = 144
45 TPAH = 630
90
Weakly
pyrogenic
A
High volatile
bituminous A coal
Breathitt Formation
Hazard Bed No. 7
Perry County, KY
KY 4530
Ret
45
Petrogenic
0
µ
g/g
16 EPAPAH = 57 600
45 TPAH = 114 000
14 000
B
Strongly
pyrogenic
Carbonized coal
Site 1
Breathitt Formation
Hazard Bed No. 7
Perry County, KY
7000
Devolatilized
0
µ
g/g
16 EPAPAH = 53 700
45 TPAH = 112 000
10 000
C
Carbonized coal
Site 2
Breathitt Formation
Hazard Bed No. 7
Perry County, KY
5000
0
µ
g/g
16 EPAPAH = 45 500
45 TPAH = 123 000
16 000
D
Coal tar
Vent 1
Breathitt Formation
Hazard Bed No. 7
Perry County, KY
8000
0
µ
g/g
16 EPAPAH = 624
45 TPAH = 1140
90
Less weathered coal tar
Weathered coal tar
Less Weathered Coal Tar
Less Weathered Coal Tar
Weathered Coal Tar
Weathered Coal Tar
E
Ver y
Strongly
Pyrogenic
Coal tar
Vent 5
Breathitt Formation
Hazard Bed No. 7
Perry County, KY
45
0
PAH analytes
Figure 11.4.3. PAH profiles of coal and natural coal tars associated with coal fires in the Breathitt Formation,
Kentucky: (A) high-volatile bituminous coal from the Breathitt Formation contains a mixture of weakly pyrogenic
to petrogenic PAHs with retene and hopane, (B) partially carbonized coal beds from the fire zone contain heavy
three- to six-ring pyrogenic PAHs consistent with coal-tar pitch (evaporated coal tar), (C) some local coal beds
exhibit greater loss of two- to three-ring PAHs due to more extreme devolatilization, (D) a coal-tar residue collected
around surface vent 1 contains heavy PAHs similar to the coal at depth, (E) a coal-tar residue collected around
surface vent 5 contains heavy pyrogenic PAHs with approximately equal concentrations of fluoranthenes/pyrenes
and benz(a)anthracenes/chrysenes due to severe thermal or environmental exposure. It also contains lighter two- to
three-ring pyrogenic PAHs representing the distillate fraction of coal tar.
