Document Detail


Trophodynamics of hexabromocyclododecanes and several other non-PBDE brominated flame retardants in a freshwater food web.
MedLine Citation:
PMID:  20575536     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Several currently used non-polybrominated diphenyl ether (PBDE) brominated flame retardants (BFRs), including hexabromocyclododecanes (HBCDs), 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE), decabromodiphenyl ethane (DBDPE), hexabromobenzene (HBB), pentabromoethylbenzene (PBEB), and pentabromotoluene (PBT), are examined in the components of a freshwater food web from an electronic waste recycling site, South China. All these BFRs are detectable in the food web, with average concentrations of 13.9-868, 1.71-518, < 3.8-338, 197-3099, 3.98-25.6, and 1.20-3.60 ng/g lipid wt for HBCDs, BTBPE, DBDPE, HBB, PBEB, and PBT, respectively. Food web magnification is observed for (+)-alpha-, (-)-alpha-, (+/-)-alpha-, and total HBCDs, and HBB, with trophic magnification factors (TMFs) of 2.22, 2.18, 2.19, 1.82, and 1.46, respectively; whereas there is trophic dilution of BTBPE and PBT through the food web. The TMFs for (+)-alpha-, (-)-alpha-, and (+/-)-alpha-HBCDs are comparable to those of PBDEs detected previously in the same food web. Biota samples show a shift from gamma- toward alpha-HBCD compared with the suspended particles, sediment, and HBCD technical mixtures, with a significant increase of alpha-HBCD on ascending trophic levels. Except for alpha-HBCD in suspended particles and sediment, all the HBCD enantiomers detected are nonracemic in the environmental matrix. In biota, nonracemic residues of alpha-HBCD were observed in mud carp and crucian carp; beta-HBCD in prawn, mud carp, and crucian carp; and gamma-HBCD in water snake, with preferences for (+)-alpha-, (-)-beta-, and (+)-gamma-HBCDs.
Authors:
Jiang-Ping Wu; Yun-Tao Guan; Ying Zhang; Xiao-Jun Luo; Hui Zhi; She-Jun Chen; Bi-Xian Mai
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental science & technology     Volume:  44     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-07-29     Completed Date:  2010-09-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5490-5     Citation Subset:  IM    
Affiliation:
Research Center for Environmental Engineering & Management, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
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MeSH Terms
Descriptor/Qualifier:
Animals
Flame Retardants / analysis*
Food Chain*
Fresh Water / chemistry*
Hydrocarbons, Brominated / chemistry*
Molecular Structure
Water Pollutants, Chemical / chemistry
Chemical
Reg. No./Substance:
0/Flame Retardants; 0/Hydrocarbons, Brominated; 0/Water Pollutants, Chemical; 25637-99-4/hexabromocyclododecane

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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