Extraction Removal of PCDD/DFs and Coplanar PCBs from Fish Oil with Supercritical Carbon Dioxide
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概要
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Supercritical carbon dioxide extraction method was applied to extraction removal of PCDDs, PCDFs and coplanar PCBs from fish oils. Three extraction parameters including of pressure, temperature and total CO<SUB>2</SUB>volume were examined: Pressure and temperature conditions were optimized to 28 MPa and 60°C, respectively; Increase of total CO<SUB>2</SUB>volume lead to increase of the extraction efficiency; In 100l of total CO<SUB>2</SUB>volume, the extraction efficiencies were ranged from 50% to 80% for PCDD/DFs, and 70% to 90% for coplanar PCBs at 60°C 28MPa. Extraction efficiencies of PCDD/DFs, and coplanar PCBs were decreased with increasing their molecular weights. And similar trend was also observed between the extraction efficiencies and Log K<SUB>ow</SUB>. These results should be due to decreasing solubility of PCDD/DFs and coplanar PCBs in supercritical carbon dioxide as a result of increase of the lipophlicities. A supercritical carbon dioxide extraction method was considered to be useful for extraction removal of PCDD/DFs and coplanar PCBs from fish oil.
- 日本環境化学会の論文
日本環境化学会 | 論文
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