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Fate of higher brominated PBDEs in lactating cows.

Kierkegaard, Amelie and Asplund, Lillemor and de Wit, Cynthia A. and McLachlan, Michael S. and Thomas, Gareth O. and Sweetman, Andrew J. and Jones, Kevin C. (2007) Fate of higher brominated PBDEs in lactating cows. Environmental Science & Technology, 41 (2). pp. 417-423. ISSN 0013-936X

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Abstract

Dietary intake studies of lower brominated diphenyl ethers (BDEs) have shown that fish and animal products are important vectors of human exposure, but almost no data exist for higher brominated BDEs. Therefore, the fate of hepta- to decaBDEs was studied in lactating cows exposed to a naturally contaminated diet by analyzing feed, feces, and milk samples from a previous mass balance study of PCB. Tissue distribution was studied in one cow slaughtered after the experiment. BDE-209 was the dominant congener in feed, organs, adipose tissues, and feces, but not in milk. In contrast to PCBs and lower brominated BDEs, concentrations of hepta- to decaBDEs in adipose tissue were 9−80 times higher than in milk fat and the difference increased with degree of bromination/log Kow. The congener profiles in adipose tissue and feed differed; BDE-207, BDE-196, BDE-197, and BDE-182 accumulated to a surprisingly greater extent in the fat compared to their isomers, suggesting metabolic debromination of BDE-209 to these BDEs. The results indicate that meat rather than dairy product consumption may be an important human exposure route to higher brominated BDEs.

Item Type: Article
Journal or Publication Title: Environmental Science & Technology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 28011
Deposited By: Mr Richard Ingham
Deposited On: 30 Oct 2009 16:27
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:42
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/28011

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