Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
2169447
Reference Type
Journal Article
Title
DEHALOGENATION OF POLYCHLORINATED BIPHENYLS (PCB) BY NUCLEOFILE REACTANTS AT THE PRESENCE OF IONIC LIQUIDS AND UNDER APPLICATION OF MICROWAVES
Author(s)
Kastanek, P; Kastanek, F; Hajek, M; Sobek, J; Solcova, O
Year
2011
Is Peer Reviewed?
1
Journal
Global NEST Journal
ISSN:
1790-7632
EISSN:
1108-4006
Volume
13
Issue
1
Page Numbers
59-64
Web of Science Id
WOS:000297448400007
Abstract
Laboratory-scale experiments were performed in order to examine the effect of microwave field on the effectiveness of KPEG method (nucleophilic substitution of the chlorine atoms in a molecule of PCBs by alkaline polyethylene glycol PEG) in the removal of PCBs from highly contaminated mineral oils with the content of indicator congeners (No 28,52,101,53,138 and 180) above 5500 mg kg(-1). Results show that the microwave field significantly increases the reaction rate and the method's effectiveness in the removal of chlorine from the molecules of PCBs. Addition of a small amount of an ionic liquid, in this case 1-butyl-3-methylimidazolium hexafluorophosphate-[bmim][PF6], significantly positively affects the results obtained under the influence of microwave field. The KPEG method enhanced by the application of microwaves could be used in practice for decontamination and recycling of PCB-containing dielectric fluids in electric capacitors and transformers. High efficiencies of the reaction were achieved even when microwaves were applied with no PEG added, only by the presence of alkaline hydroxide or by the presence of a small amount, up to ca. 2%, of an ionic liquid [bmim][PF6]. The microwave enhanced KPEG method might has some advantages for practical uses in decontamination applications.
Keywords
PCBs; mineral oil; nucleophilic substitution; polyethylene glycol; KOH; microwaves; ionic liquids
Tags
IRIS
•
PCBs
Litsearches
Remaining
LitSearch August 2015
WoS
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity