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4.7 Naphthenic Mono-Aromatics
Regression method-based BCF predictions for naphthenic mono-aromatics (Figure 45)
are above the B criterion of 2000 for structures ranging from C13 to C24. When
biotransformation is incorporated to the model, BCF predictions are above 2000 for a few
C14 and C17 structures (Figure 46). Some aqueous and dietary BCFs are above 2000 in
the C13-C18 range, although none of these values exceed 5000 (Table 17). Experimental
BMFs derived from dietary data are all below one, with the exception of one compound
(3-phenyl bicyclohexyl), which has a BMF near unity but a dietary calculated BCF of
only 300. It can be concluded that based on the available data, some naphthenic monoaromatic
hydrocarbons in the C13 to C18 range may be bioaccumulative, but are not very
bioaccumulative.
100000
10000
BCF (regression)
1000
100
10
NMAr
B
vB
1
5 10 15 20 25 30 35
Carbon Number
Figure 45. Predicted fish BCFs for naphthenic mono-aromatic hydrocarbons using the
regression-based approach in BCFBAF. NMAr: naphthenic monoaromatic. B – 2000, vB
- 5000
46