Short Chain Chlorinated
Paraffins in Mollusks from
Coastal Waters in the Chinese Bohai Sea
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Abstract
As an extremely complex group of persistent organic pollutants
(POPs) candidates in the Stockholm Convention, short chain chlorinated
paraffins (SCCPs) have been of extensive concern in recent years.
In this study, nine bivalve and two gastropod species were collected
in 2009 to evaluate the spatial distributions and potential factors
influencing the bioaccumulation of SCCPs in mollusks in the Chinese
Bohai Sea. The concentrations of ∑ SCCPs in the mollusks were
in the range 64.9–5510 ng/g (dry weight) with an average chlorine
content of 61.1%. C<sub>10</sub> and C<sub>11</sub> were the predominant
homologue groups of SCCPs, which accounted for about 29.7% and 34.9%
of ∑ SCCPs, respectively. Six and seven chlorinated substituents
were the main congener groups. Mya arenaria (Mya), Mactra veneriformis (Mac),
and Crassostrea talienwhanensis (Oyster,
Ost) had higher average concentrations of SCCPs than other species,
implying that these bivalves could be used as sentinels to indicate
SCCPs contamination in this coastal region. A significant positive
linear relationship was found between SCCP concentrations and lipid
content of the mollusks, whereas the lipid-normalized SCCP concentrations
were negatively linear-related to the trophic levels (TL), which implied
that SCCPs did not show biomagnification in mollusks in this region