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Citation
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HERO ID
3350466
Reference Type
Journal Article
Title
Reductive transformation of hexabromocyclododecane (HBCD) by FeS
Author(s)
Li, D; Peng, P; Yu, Z; Huang, W; Zhong, Y
Year
2016
Is Peer Reviewed?
1
Journal
Water Research
ISSN:
0043-1354
EISSN:
1879-2448
Publisher
Elsevier Ltd
Book Title
Water Research
Volume
101
Page Numbers
195-202
Language
English
PMID
27262547
DOI
10.1016/j.watres.2016.05.066
Web of Science Id
WOS:000381169400021
URL
http://www.sciencedirect.com/science/article/pii/S004313541630392X
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Abstract
Both iron monosulfide (FeS) and brominated flame retardants (BFRs) are widely found at relatively high levels in anoxic sediments, but little is known about the reactions of FeS with BFRs. Prior studies showed that FeS was variously reactive with chlorinated organic pollutants in many anoxic environments. It is intuitive that FeS is also reactive with BFRs under anoxic conditions. This study was initiated to test such a hypothesis by quantifying the rates of reductive transformation of tetrabromobisphenol A (TBBPA), decabrominated diphenyl ether (decaBDE) and hexabromocyclododecane (HBCD) using synthetic FeS as the reactive agent. The results showed that over 90% of HBCD was transformed by FeS within 24 h, whereas both TBBPA and decaBDE were found nonreactive within 2 days. The transformation of HBCD followed a pseudo-first-order rate kinetic and the observed rate constants were dependent on the initial concentrations of FeS and HBCD. The transformation rates of β- and γ-HBCD were significantly faster than that of α-HBCD. Analysis of bromine ion and other transformation products suggested that sequential dibromoelimination to form 1,5,9-cyclododecatriene was likely to be a dominant pathway for the reductive transformation of HBCD by FeS. Surface characterization of FeS by XPS indicated that both Fe(II) and S(-II) on the FeS surface might have contributed considerably to the transformation of HBCD. These findings imply that FeS may play an important role in natural attenuation of HBCD and that it may be used as a reactive agent for treating HBCD-contaminated sediments.
Keywords
CHEM METHODS
Tags
IRIS
•
Hexabromocyclododecane (HBCD)
New 7/2016 (private)
Database Searches
Pubmed
Excluded/Not on Topic
OPPT REs
•
OPPT_Cyclic Aliphatic Bromine Cluster (HBCD)_C. Engineering
Data screening total
Screening: Excluded
•
OPPT_Cyclic Aliphatic Bromine Cluster (HBCD)_D. Exposure
Total – title/abstract screening
Off topic
•
OPPT_Cyclic Aliphatic Bromine Cluster (HBCD)_E. Fate
Total – title/abstract screening
Off topic
•
OPPT_Cyclic Aliphatic Bromine Cluster (HBCD)_F. Human Health
Total – title/abstract screening
Off topic
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