US EPA

1928006 

Journal Article 

PBDES AND METHOXYLATED ANALOGUES IN SEDIMENT CORES FROM TWO MICHIGAN, USA, INLAND LAKES 

Bradley, PW; Wan, Yi; Jones, PD; Wiseman, S; Chang, H; Lam, MHW; Long, DT; Giesy, JP 

2011 

Yes 

Environmental Toxicology and Chemistry
ISSN: 0730-7268
EISSN: 1552-8618 

30 

6 

1236-1242 

English 

21337611 

10.1002/etc.500 

WOS:000290825200002 

Polybrominated diphenyl ethers (PBDEs) have been widely
studied in sediments from the North American Great Lakes; however, no studies have been conducted
of occurrences of methoxylated (MeO-) PBDEs in abiotic compartments in this region. In the
present study, 23 tri- to hepta-PBDEs and 12 MeO-PBDEs were analyzed in dated sediment cores
collected from two inland lakes (White Lake and Muskegon Lake) in Michigan, USA. Concentrations
of Sigma(23)PB DEs ranged from 3.9 x 10(-1) to 2.4 x 10 and from 9.8 x 10(-1) to 3.9 x 10(0) ng/g
dry weight in White Lake and Muskegon Lake, respectively. The historical trends of tri- to
hepta-PBDEs in the two lakes were different, possibly because of different input and remediation
histories. The tri- to hepta-PBDE profiles were similar in the two lakes, with BDE-47 as the
predominant congener, followed by BDE-99 and BDE-183. A different temporal trend for BDE-183 was
found compared with other PBDEs, which is consistent with debromination of high-brominated PBDEs
during sedimentation and aging. Methoxylated-PBDEs were detected only in Muskegon Lake (3.6 x 10
(-3) to 1.2 x 10(-1) ng/g dry wt). Methoxylated PBDEs showed different temporal trends compared
with tri- to hepta-PBDEs. The differences in patterns of concentrations of MeO-PBDEs in the two
lakes might be due to different aquatic communities in each lake. The occurrences of MeO-PBDEs
could be the major source of hydroxylated polybrominated diphenyl ethers (OH-PBDEs) observed in
organisms collected in these freshwater systems. Environ. Toxicol. Chem. 2011;30:1236-1242. 2011
SETAC 

PBDE; Methoxylated PBDE; Sedimentation rate; Great Lakes; Dating