Geology Reference
In-Depth Information
1400
n
g/g
16 EPAPAH = 1680
45 TPAH = 11 500
Per
Petrogenic
two- to four-Ring PAHs
Increasing slope
or Bell curve
A
Lignite A
coal
Beulah, ND
DECS 11
Pyrogenic
five- to six-Ring
Natural fire?
700
0
ng/g
16 EPAPAH = 1900
45 TPAH = 15 600
2500
Petrogenic
two- to four-Ring PAHs
B
Per
Subbituminous A
coal
Deadman, WY
DECS 27
Pyrogenic
five- to six-Ring
Natural fire?
800
0
ng/g
16 EPAPAH = 10 000
45 TPAH = 73 100
9000
Petrogenic
two- to four-Ring PAHs
C
High-volatile
bituminous B coal
Ohio #4A, OH
DECS 33
4500
Pyrogenic
five- to six-Ring
Natural Fire?
0
ng/g
16 EPAPAH = 2000
45 TPAH = 32 800
5000
D
Petrogenic
two- to four-Ring PAHs
Medium-volatile
bituminous coal
Basin M, CO
DECS 3
2500
Pyrogenic
five- to six-Ring
Natural fire?
0
ng/g
16 EPAPAH = 38
45 TPAH = 193
35
Petrogenic
two-Ring PAHs
E
Anthracite
coal
Lykens Valley #2, PA
DECS 21
Weakly
Pyrogenic
three- to four-Ring PAHs
17.5
Pyrogenic
five- to six-Ring
Natural fire?
0
PAH analytes
Figure 11.3.2. PAH profiles of extractable hydrocarbons in selected coals by increasing rank. These PAH profiles
employ GC/MS to reduce the effects of saturated and polar compounds that obscure these signatures in the GC/FID
fingerprints. The purified PAH profile demonstrates some unique features of coal commonly encountered in
environmental samples: (A) Lignite (DECS-11) exhibits petrogenic two- to four-ring PAHs with elevated
proportions of the diagenetic PAH, perylene, (B) subbituminous coal (DECS-27) resembles the alkylated PAHs
in lignite, except the proportions of perylene are lower, (C) high-volatile bituminous coal (DECS-33) exhibits the
classic fossil fuel pattern of two- to four-ring PAHs with enriched alkylation, (D) medium-volatile bituminous coal
(DESC-3) also exhibits the classic fossil fuel pattern of 2- to 4-ring PAHs with enriched alkylation, and (E)
anthracite contains two- to four-ring PAHs with slightly enriched parent PAHs. From Stout and Emsbo-Mattingly
2008.
