Article (Scientific journals)
Supercritical fluid extraction of polychlorinated dibenzo-p-dioxins from fly ash: the importance of fly ash origin and composition on extraction efficiency
Windal, I.; Eppe, Gauthier; Gridelet, A. C. et al.
1998In Journal of Chromatography. A, 819 (1-2), p. 187-195
Peer Reviewed verified by ORBi
 

Files


Full Text
Windal et al.pdf
Publisher postprint (374.52 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
extraction methods; fly ash; polychlorinated dibenzodioxins
Abstract :
[en] Supercritical fluid extraction (SFE) of polychlorinated dibenzo-p-dioxins (dioxins) from by ash samples, collected at different municipal waste incinerators, was investigated using supercritical CO2 and compared to the classical Soxhlet extraction. Results were correlated to fly ash composition, which is strongly related to the fume purification system used in the incinerators. Fly ash collected at the bottom of the electrostatic precipitator is composed of dust coming from the combustion unit, but also of lime and eventually of activated charcoal injected in the fumes for acids and pollutants removal. When only lime is used for the fume purification, SFE of dioxins from fly ash leads to better results than Soxhlet extraction. The use of a binary cosolvent (trifluoroacetic acid in toluene) greatly increases the percentage recovery. When activated charcoal is used in conjunction with lime for the fume purification, SFE under classical extraction conditions is not powerful enough to extract dioxins, which are strongly adsorbed to the residual activated charcoal. (C) 1998 Elsevier Science B.V. All rights reserved.
Disciplines :
Chemistry
Biochemistry, biophysics & molecular biology
Author, co-author :
Windal, I.
Eppe, Gauthier  ;  Université de Liège - ULiège > Centre interfac. d'analyse des résidus en traces (CART)
Gridelet, A. C.
De Pauw, Edwin  ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Language :
English
Title :
Supercritical fluid extraction of polychlorinated dibenzo-p-dioxins from fly ash: the importance of fly ash origin and composition on extraction efficiency
Publication date :
1998
Journal title :
Journal of Chromatography. A
ISSN :
0021-9673
eISSN :
1873-3778
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
819
Issue :
1-2
Pages :
187-195
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 14 July 2009

Statistics


Number of views
79 (5 by ULiège)
Number of downloads
1 (1 by ULiège)

Scopus citations®
 
28
Scopus citations®
without self-citations
25
OpenCitations
 
18

Bibliography


Similar publications



Contact ORBi