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FRESH OIL
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8 h WEATHERING
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48 h WEATHERING
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44 d AMOCO-CADIZ MOUSSE WWvVA
Figure 10. Gas chromotograms of aromatic fraction of light Arabian
crude oils and Amoco Cadiz mousse.
mousse were observed at either site ifjata not shown). Table 8, shows
the effects of mousse additions on [2- C]-acetate oxidation to CO .
No' CH, was detected in any of the samples. At the unoiled control
site, the addition of 5% mousse decreased the amount of CO produced
in 2h by 70% (p = 0.02), while an 86% inhibition was observed with the
additions of 25% mousse (p = 0.01). At, the oiled site at lie Grande,
mousse additions appeared to inhibit CO production from [2- C]acetate
although these differences were not significantly different
from the control (p ^ 0.25).
on
The effect of fresh
microbial activities
and slightly weathered light Arabian crude
in sediments was also examined because of
oil
the
probable chemical differences between the highly weathered mousse and
the oil which impacted the sites studied. The effect of 0.05% benzene
and toluene was also examined. They are highly volatile aromatic com-
pounds with known inhibitory effects (Robertson et al, 1973). Figure 9
shows chromatograms of the saturate fraction of the fresh and weathered
light Arabian crude. The fresh oil contained large amounts of low
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