Kawashima Ayato, Iwakiri Ryouji, Honda Katsuhisa
Environmental Science for Industry, Faculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama-shi, Ehime 790-8566, Japan.
J Agric Food Chem. 2006 Dec 27;54(26):10294-9. doi: 10.1021/jf061962d.
Recently, it has been found that fish oils contain a high proportion of contaminants, namely, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and coplanar polychlorinated biphenyls (cPCBs). In this study, the removal of contaminants from fish oil by supercritical CO2 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 degrees 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.
最近，人们发现鱼油中含有高比例的污染物，即多氯二苯并 - 对 - 二噁英（PCDDs）、多氯二苯并呋喃（PCDFs）和共平面多氯联苯（cPCBs）。在本研究中，研究了通过超临界二氧化碳萃取（SCE）和使用吸附剂（占油重0.13 wt%）从鱼油中去除污染物的情况。在60摄氏度温度和28兆帕压力下，通过SCE从鱼油中萃取二噁英和cPCBs，PCDDs和PCDFs的去除效率在15% - 90%范围内，cPCBs的去除效率在70% - 90%范围内。然而，40%的油会与污染物同时被萃取出来。在吸附剂处理方面，活性炭显示出高效率，PCDDs和PCDFs的去除效率大于90%，但cPCBs的去除效率低于30%。这两种方法结合起来更有效，几乎可以将总毒性当量值降低100%。
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