Publication
Title
Causes of variability in concentrations and diastereomer patterns of hexabromocyclododecanes in indoor dust
Author
Abstract
The temporal evolution of concentrations of á-, â-, and ã-hexabromocyclododecanes (HBCDs), and pentabromocyclododecenes (PBCDs degradation products of HBCDs) was studied in separate aliquots of a well-homogenized indoor dust sample. These were: (a) exposed to natural light, and (b) kept in the dark. Results revealed a rapid photolytically-mediated shift from ã-HBCD to á-HBCD that was complete after 1 week of exposure, and a slower degradative loss of HBCDs via elimination of HBr. Under the specific conditions studied in this experiment, calculated half-lives (t1/2) showed the decay in ÓHBCDs concentration was faster in light-exposed samples (t1/2 = 12 weeks), than in light-shielded dust (t1/2 = 26 weeks). Within-room spatial and temporal variability in concentrations and diastereomer patterns were studied in six and three rooms respectively. While in some rooms, little variability was detected, in others it was substantial. In one room, concentrations of ÓHBCDs and the relative abundance of ã-HBCD declined dramatically with increasing distance from a TV. The same TV appears to have influenced strongly the temporal variation in that room; with higher concentrations observed in its presence and when the TV was moved closer to the area sampled. Significant negative correlation was observed in one room between concentrations of ÓHBCDs and dust loading (g dust m− 2 floor), implying dilution occurs at higher dust loadings.
Language
Dutch
Source (journal)
Environment international. - Oxford
Publication
Oxford : 2009
ISSN
0160-4120
Volume/pages
35:3(2009), p. 573-579
ISI
000265172900022
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 15.05.2009
Last edited 01.11.2017
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