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ABSTRACT
Krill oils (KOs) were prepared using different extraction methods (hexane and supercritical carbon dioxide), different materials (heat-dried krill powder, freeze-dried krill powder, and freeze-dried krill tail meat powder), and different standing times during hexane extraction. The fluoride concentrations in the KOs were positively correlated with the protein concentrations. Absorbents were employed to remove fluoride from KO. Activated clay achieved the highest fluoride removal rate (70.66%), followed by calcium oxide (14.49%), activated carbon (11.97%), calcium chloride (9.32%), activated alumina (0.94%), and chitosan (0.52%). Meanwhile, the protein removal rates of the above absorbents were positively correlated with the fluoride removal rates.
Funding
This work was financially supported by The National High Technology Research and Development Program of China (863 Program) (2011AA090801), the Program for Liaoning Excellent Talents in University (LR2015006), the Liaoning Provincial Natural Science Foundation of China (2015020781), the Project of Distinguished Professor of Liaoning Province (2015-153), the Program for Dalian High-Level Innovative Talent (2015R0007), and the Organization Project for National Engineering Research Center of Seafood funded by Ministry of Science and Technology of the People’s Republic of China (2012FU125X03).