PMID- 24946276
OWN - NLM
STAT- MEDLINE
DCOM- 20141008
LR  - 20181202
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 48
IP  - 14
DP  - 2014 Jul 15
TI  - Cyclodextrin polymers as highly effective adsorbents for removal and recovery of 
      polychlorobiphenyl (PCB) contaminants in insulating oil.
PG  - 8094-100
LID - 10.1021/es501243v [doi]
AB  - A total of 179 countries (parties) ratified the Stockholm Convention on 
      persistent organic pollutants (POPs) and agreed to destroy polychlorobiphenyls 
      (PCBs) and develop a sound management plan by 2028. Currently, still 3 million 
      tons of PCB-contaminated oil and equipment need to be managed under the Stockholm 
      Convention. Thus, the development of a facile and environmentally benign method 
      to treat large amounts of oil stockpiles contaminated with PCBs is a crucial 
      subject. Herein, we report that cyclodextrin (CD) polymers, which are easily 
      prepared by cross-linking the renewable cyclic oligosaccharide gamma-cyclodextrin 
      (gamma-CD) with dibasic acid dichlorides, are a new selective and powerful adsorbent 
      to remove PCB contaminants in oil. When PCB (100 ppm)-contaminated oil was passed 
      through a column packed with the terephthaloyl-cross-linked gamma-CD polymer (TP-gamma-CD 
      polymer) at 80-110  degrees C, the PCB contaminants were completely removed from the oil. 
      Additionally, methyl esterification of the free carboxylic groups of the TP-gamma-CD 
      polymer enabled the complete recovery of the PCBs adsorbed on the polymer (with 
      >99.9% recovery efficiency) by simply washing with acetone. The methyl-esterified 
      TP-gamma-CD polymer could be recycled at least 10 times for PCB adsorption without 
      any loss in the adsorption capability. These results revealed that the gamma-CD 
      polymers can function as highly effective and powerful adsorbents for the removal 
      and recovery of PCBs from PCB-contaminated oil and, thus, significantly 
      contribute to the protection of the global environment.
FAU - Kawano, Shintaro
AU  - Kawano S
AD  - Department of Applied Chemistry, Graduate School of Engineering, Osaka University 
      , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
FAU - Kida, Toshiyuki
AU  - Kida T
FAU - Miyawaki, Kazuhiro
AU  - Miyawaki K
FAU - Noguchi, Yuki
AU  - Noguchi Y
FAU - Kato, Eiichi
AU  - Kato E
FAU - Nakano, Takeshi
AU  - Nakano T
FAU - Akashi, Mitsuru
AU  - Akashi M
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20140701
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Cyclodextrins)
RN  - 0 (Environmental Pollutants)
RN  - 0 (Oils)
RN  - 0 (cyclodextrin polymer)
RN  - 0 (gamma-Cyclodextrins)
RN  - 9004-34-6 (Cellulose)
RN  - DFC2HB4I0K (Polychlorinated Biphenyls)
RN  - KZJ0BYZ5VA (gamma-cyclodextrin)
SB  - IM
MH  - Adsorption
MH  - Cellulose/chemical synthesis/*chemistry
MH  - Cyclodextrins/chemical synthesis/*chemistry
MH  - Environmental Pollutants/*isolation & purification
MH  - Oils/*chemistry
MH  - Polychlorinated Biphenyls/chemistry/*isolation & purification
MH  - Temperature
MH  - gamma-Cyclodextrins/chemistry
EDAT- 2014/06/20 06:00
MHDA- 2014/10/09 06:00
CRDT- 2014/06/20 06:00
PHST- 2014/06/20 06:00 [entrez]
PHST- 2014/06/20 06:00 [pubmed]
PHST- 2014/10/09 06:00 [medline]
AID - 10.1021/es501243v [doi]
PST - ppublish
SO  - Environ Sci Technol. 2014 Jul 15;48(14):8094-100. doi: 10.1021/es501243v. Epub 
      2014 Jul 1.