Environmental Engineering Reference
In-Depth Information
as determined by their ability to mineralize glucose (Figure 7.6). Fan 9 and
VF1 are both
Mycobacterium
strains. EPA 505 and FLA 10-1 are both
Sphin-
gomonas
strains. Interestingly, one of the strains tested in these experiments
was able to recover from the effects of Triton X-100 after extended incubation.
This suggests that the surfactant interacts with the cell membrane, perhaps
allowing for greater transport of PAHs inside, and that the extent of this
interaction determines the eventual toxicity.
Mineralization of
14
C-glucose
Mineralization of
14
C-fluoranthene
A
E
70
60
50
40
30
20
10
0
B
F
40
30
20
10
0
C
G
60
50
40
30
20
10
0
D
H
60
50
40
30
20
10
0
0
10
20
hours
30
40
50
0
50
100
hours
150
Figure 7.6
Mineralization of fluoranthene and glucose by four fluoranthene-degrad-
ing strains in the presence (squares and triangles) and absence (circles) of surfactants.
Surfactants were Tween 80 (squares) and Triton X-100 (triangles). (From Ho, Y. et al.,
J. Ind. Microbiol. Biotechnol.
, 24, 100-112, 2000.)
