Experimental Study on the Removal of Dioxins and Coplanar
Polychlorinated Biphenyls (PCBs) from Fish Oil
Ayato Kawashima
Ryouji Iwakiri
Katsuhisa Honda
10.1021/jf061962d.s001
https://acs.figshare.com/articles/journal_contribution/Experimental_Study_on_the_Removal_of_Dioxins_and_Coplanar_Polychlorinated_Biphenyls_PCBs_from_Fish_Oil/3038638
Recently, it has been found that fish oils contain a high proportion of contaminants, namely,
polychlorinated dibenzo-<i>p</i>-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and coplanar
polychlorinated biphenyls (cPCBs). In this study, the removal of contaminants from fish oil by
supercritical CO<sub>2</sub> extraction (SCE) and by using adsorbents (0.13 wt % of oil) was investigated. Dioxins
and cPCBs were extracted from fish oil by SCE at a temperature of 60 °C and a pressure of 28 MPa,
and the removal efficiencies for PCDDs and PCDFs were in the range of 15−90% and those for
cPCBs were in the range of 70−90%. However, 40% of the oil was extracted simultaneously with
contaminants. On the adsorbent treatment, activated carbon showed high efficiency, and the removal
efficiencies were >90% for PCDDs and PCDFs, but below 30% for cPCBs. A combination of both of
these methods is more effective, and almost 100% of the total toxicity equivalence quantity value
could be reduced.
Keywords: Fish oil; dioxins; supercritical CO<sub>2</sub>; extraction; activated carbon
2006-12-27 00:00:00
removal efficiencies
CO 2 extraction
SCE
toxicity equivalence quantity value
fish oil
cPCB
PCDF
PCDD
coplanar polychlorinated biphenyls
efficiency
Coplanar Polychlorinated Biphenyls
contaminants