Environmental Engineering Reference
In-Depth Information
100
A
Group 1 PAHs
Group 2 PAHs
Group 3 PAHs
80
60
40
20
0
0
2
4
6
8
10
12
Weeks
100
B
80
60
40
Group 1 PAHs
Group 2 PAHs
Group 3 PAHs
20
0
0
5
10
15
20
25
30
Days
Figure 7.2
Biodegradation of PAHs during solid phase (A) and slurry phase (B)
treatment of contaminated surface soils amended with nutrients. Group 1 was 2-ring
PAHs (naphthylene, methyl and dimethyl naphthalenes, biphenyl), Group 2 was
3-ring PAHs (acenaphthylene, acenaphthene, phenanthrene, anthracene, methyl-an-
thracene), and Group 3 was 4-, 5-, and 6-ring PAHs (fluoranthene, pyrene, ben-
zo(b)fluorine, chrysene, benzo(a)pyrene, benzo(a)anthracene, indenopyrene,
benzo(b,k)fluoranthene).
benzo(a)pyrene, benzo(a)anthracene, indenopyrene, and benzo(b,k)fluoran-
thene). For the group 3 PAHs, 40% removal occurred in 30 days in the slurry
reactor and in 12 weeks in the solid phase reactors. However, degradation
