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Evaluation of Long-Range Transport Potential of Selected Brominated Flame Retardants with Measured 1-Octanol-Air Partition Coefficients

Authors
Lee, Hyun-JeoungKwon, Jung-Hwan
Issue Date
10월-2016
Publisher
WILEY-V C H VERLAG GMBH
Keywords
Long-range transport potential; Environmental fate; Partition coefficient; Degradability; Alternatives
Citation
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.37, no.10, pp.1696 - 1702
Indexed
SCIE
SCOPUS
KCI
Journal Title
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
Volume
37
Number
10
Start Page
1696
End Page
1702
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/87385
DOI
10.1002/bkcs.10933
ISSN
0253-2964
Abstract
Various alternative flame retardants are used in many countries since polybrominated diphenyl ethers (PBDEs) were classified as persistent organic pollutants (POPs). However, difficulties in the evaluation of the long-range transport potential (LRTP) of the alternatives are related to the lack of information on their physicochemical properties, which govern their environmental fates and transport. Based on the simulation of LRTP using OECD P-OV and LRTP Screening Tool, five alternative brominated flame retardants (BFRs) (hexabromobenzene [HBB], 2,3,4,5,6-pentabromotoluene [PBT], 2,3,4,5,6-pentabromoethylbenzene [PBEB], 2-ethylhexyl 2,3,4,5-tetrabromobenzoate [TBB], and 1,2,4,5-tetrabromo-3,6-dimethylbenzene [TBX]), and 3 PBDEs (BDE-28, BDE-47, and BDE-99) were chosen to perform a refined assessment. This was done using an experimentally measured 1-octanol-air partition coefficient (K-OA) for the calculation of the air-water partition coefficient (K-AW) required for the model. The four selected alternative BFRs (HBB, PBT, PBEB, TBX) have K-OA values close to the in silico estimation used in the screening evaluation. On the other hand, the measured K-OA value for TBB was two orders of magnitude lower than the estimated value used in the screening simulation. The refined simulation showed that characteristic travel distance (CTD) and transfer efficiency (TE) for HBB, PBT, PBEB, and TBX were greater than those for BDE-28, whereas CTD and TE for TBB were lower than those for BDE-28. This suggested that TBB has a lower LRTP than BDE-28, considering the refined partition coefficients.
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Kwon, Jung Hwan
생명과학대학 (환경생태공학부)
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