PMID- 30286551
OWN - NLM
STAT- MEDLINE
DCOM- 20181108
LR  - 20181108
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 212
DP  - 2018 Dec
TI  - Debromination of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) by synthetic 
      Pd/Fe(0) and Cu/Fe(0) in different protic solvents.
PG  - 946-953
LID - S0045-6535(18)31647-3 [pii]
LID - 10.1016/j.chemosphere.2018.09.004 [doi]
AB  - Polybrominated diphenyl ethers (PBDEs) belong to a class of persistent organic 
      pollutants (POPs), with potential toxicity to the liver, reproductive system, and 
      development of mammals. The highly toxic and concentrated congener, 
      2,2',4,4'-tetrabromodiphenyl ether (BDE-47), was chosen to investigate 
      debromination mechanisms by the two synthetic iron-based bimetals (Pd/Fe(0) and 
      Cu/Fe(0)) in two protic solvents (water and ethanol). SEM, XPS, and BET analyses 
      showed that the synthetic bimetals Pd/Fe(0) and Cu/Fe(0) were spherical with 
      diameters of about 100 nm and loaded with  approximately 1% (wt%) of Pd and Cu, respectively. 
      GC-MS was used for the analysis of degradation products and the chromatograms 
      showed that both Pd/Fe(0) and Cu/Fe(0) bimetals had effective reducing properties 
      in water solvent. In ethanol solvent, debromination of BDE-47 by Pd/Fe(0) showed 
      a similar high activity, but BDE-47 could be hardly degraded by Cu/Fe(0). The 
      dominant debromination products of BDE-47 by Pd/Fe(0) and Cu/Fe(0) were 
      ortho-substituted and para-substituted BDEs, respectively. Active H-atomic 
      transfer was found to play a key role in the debromination of BDE-47 by Pd/Fe(0) 
      in both, water and ethanol, with a preference for para-debromination along with 
      the formation of dibenzo-p-furan (DF) as the by-product, mainly in water. In 
      contrast, electron transfer with a preference for ortho-debromination was found 
      to play a predominant role for Cu/Fe(0) system in water. More importance should 
      be provided to active H-atomic transfer for its high efficiency. In-depth study 
      on the mechanism of formation of by-product DF would be significant for its 
      higher toxicity, possibility of accumulation and migration in the environment.
CI  - Copyright (c) 2018 Elsevier Ltd. All rights reserved.
FAU - Li, Huafeng
AU  - Li H
AD  - School of Environment and Energy, South China University of Technology, Guangzhou 
      510006, China.
FAU - Wang, Jin
AU  - Wang J
AD  - School of Environment and Energy, South China University of Technology, Guangzhou 
      510006, China.
FAU - Wang, Rui
AU  - Wang R
AD  - School of Environment and Energy, South China University of Technology, Guangzhou 
      510006, China.
FAU - Huang, Kaibo
AU  - Huang K
AD  - School of Environment and Energy, South China University of Technology, Guangzhou 
      510006, China.
FAU - Luo, Wanying
AU  - Luo W
AD  - College of Environmental Science and Engineering, Zhongkai University of 
      Agriculture and Engineering, Guangzhou 510225, China.
FAU - Tao, Xueqin
AU  - Tao X
AD  - College of Environmental Science and Engineering, Zhongkai University of 
      Agriculture and Engineering, Guangzhou 510225, China.
FAU - Dang, Zhi
AU  - Dang Z
AD  - School of Environment and Energy, South China University of Technology, Guangzhou 
      510006, China; The Key Lab of Pollution and Ecosystem Restoration in Industry 
      Clusters, Ministry of Education, Guangzhou 510006, China.
FAU - Yin, Hua
AU  - Yin H
AD  - School of Environment and Energy, South China University of Technology, Guangzhou 
      510006, China; The Key Lab of Pollution and Ecosystem Restoration in Industry 
      Clusters, Ministry of Education, Guangzhou 510006, China.
FAU - Guo, Chuling
AU  - Guo C
AD  - School of Environment and Energy, South China University of Technology, Guangzhou 
      510006, China; The Key Lab of Pollution and Ecosystem Restoration in Industry 
      Clusters, Ministry of Education, Guangzhou 510006, China.
FAU - Lu, Guining
AU  - Lu G
AD  - School of Environment and Energy, South China University of Technology, Guangzhou 
      510006, China; The Key Lab of Pollution and Ecosystem Restoration in Industry 
      Clusters, Ministry of Education, Guangzhou 510006, China; Guangdong Engineering 
      and Technology Research Center for Environmental Nanomaterials, Guangzhou 510006, 
      China. Electronic address: GNLu@foxmail.com.
LA  - eng
PT  - Journal Article
DEP - 20180904
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Halogenated Diphenyl Ethers)
RN  - 0 (Metals, Heavy)
RN  - 0 (Solvents)
RN  - 0N97R5X10X (2,2',4,4'-tetrabromodiphenyl ether)
RN  - 5TWQ1V240M (Palladium)
RN  - 789U1901C5 (Copper)
RN  - E1UOL152H7 (Iron)
SB  - IM
MH  - Animals
MH  - Copper/chemistry
MH  - Electron Transport
MH  - Halogenated Diphenyl Ethers/*chemistry
MH  - *Halogenation
MH  - Iron/chemistry
MH  - Metals, Heavy/*chemistry
MH  - Palladium/chemistry
MH  - Solvents/*chemistry
OTO - NOTNLM
OT  - Active H-atomic transfer
OT  - BDE-47
OT  - Bimetal
OT  - Debromination
OT  - Pathway
EDAT- 2018/10/06 06:00
MHDA- 2018/11/09 06:00
CRDT- 2018/10/06 06:00
PHST- 2018/07/01 00:00 [received]
PHST- 2018/08/30 00:00 [revised]
PHST- 2018/09/01 00:00 [accepted]
PHST- 2018/10/06 06:00 [entrez]
PHST- 2018/10/06 06:00 [pubmed]
PHST- 2018/11/09 06:00 [medline]
AID - S0045-6535(18)31647-3 [pii]
AID - 10.1016/j.chemosphere.2018.09.004 [doi]
PST - ppublish
SO  - Chemosphere. 2018 Dec;212:946-953. doi: 10.1016/j.chemosphere.2018.09.004. Epub 
      2018 Sep 4.