Fish oil is a rich source of polyunsaturated fatty acids,and its refinement has drawn attention for years.An appropriate adsorbent can effectively remove the pigment impurities in the fish oil.This study evaluated the...Fish oil is a rich source of polyunsaturated fatty acids,and its refinement has drawn attention for years.An appropriate adsorbent can effectively remove the pigment impurities in the fish oil.This study evaluated the impact of different absorbents on the reduction of oxidation products and color of anchovy oil during the decolorization under high vacuum.Using the single factor design,four process parameters including adsorbents type,adsorbent amount,temperature and time were tested to determine the optimum decolorization parameter.The results showed the optimum decolorization conditions were that the fish oil was treated with 8%acti-vated alumina at 80℃for 40 min.In the central group experiment,the addition amounts of mixed absorbents(activated earth and activated alumina),including the mass ratio of adsorbent in oil(5%-11%,w/w)and the mass ratio of activated earth in total absor-bent(20%-80%,w/w)were optimized to remove the oxidation products.Under the optimum condition at 10.18%of adsorbent and 70%of activated earth,the total oxidation value(TOTOX value)showed the minimum with the 44.4%of removal rate.Eight metal elements were analyzed in decolorized oil using inductively coupled plasma mass spectrometry(ICP-MS).The removal rates of Zn and Pb were 94.12%and 55.35%,respectively.The decolorization process using mixed absorbents under appropriate condition can significantly reduce the oxidation products and pigments in fish oil,which will benefit the industrial production of fish oil.展开更多
The particulate hydrous oxides of rare-earth RExOy· nH2O(RE=Ce,Nd,La,Pr)have been prepared using polyacrylonitrile as adhesive agent. They showed better fluorideremoving property. The adsorption mechanism in rela...The particulate hydrous oxides of rare-earth RExOy· nH2O(RE=Ce,Nd,La,Pr)have been prepared using polyacrylonitrile as adhesive agent. They showed better fluorideremoving property. The adsorption mechanism in relation with the pH value and temperatureof the solution have been discussed briefly.展开更多
基金This work was supported financially by the Ocean University of China,under the Classification of Project Number of 2018YFC0311201.
文摘Fish oil is a rich source of polyunsaturated fatty acids,and its refinement has drawn attention for years.An appropriate adsorbent can effectively remove the pigment impurities in the fish oil.This study evaluated the impact of different absorbents on the reduction of oxidation products and color of anchovy oil during the decolorization under high vacuum.Using the single factor design,four process parameters including adsorbents type,adsorbent amount,temperature and time were tested to determine the optimum decolorization parameter.The results showed the optimum decolorization conditions were that the fish oil was treated with 8%acti-vated alumina at 80℃for 40 min.In the central group experiment,the addition amounts of mixed absorbents(activated earth and activated alumina),including the mass ratio of adsorbent in oil(5%-11%,w/w)and the mass ratio of activated earth in total absor-bent(20%-80%,w/w)were optimized to remove the oxidation products.Under the optimum condition at 10.18%of adsorbent and 70%of activated earth,the total oxidation value(TOTOX value)showed the minimum with the 44.4%of removal rate.Eight metal elements were analyzed in decolorized oil using inductively coupled plasma mass spectrometry(ICP-MS).The removal rates of Zn and Pb were 94.12%and 55.35%,respectively.The decolorization process using mixed absorbents under appropriate condition can significantly reduce the oxidation products and pigments in fish oil,which will benefit the industrial production of fish oil.
基金Project(2023JJ40623)supported by the Hunan Provincial Natural Science Foundation,ChinaProject(2023B1212060048)supported by Science and Technology Planning Project of Guangdong Province,China+2 种基金Project(22QDZ50)supported by Research Foundation for Ph D of Xiangtan University,ChinaProject(23B0153)supported by Excellent Youth Funding of Hunan Provincial Education Department,ChinaProject supported by the Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province,China。
文摘The particulate hydrous oxides of rare-earth RExOy· nH2O(RE=Ce,Nd,La,Pr)have been prepared using polyacrylonitrile as adhesive agent. They showed better fluorideremoving property. The adsorption mechanism in relation with the pH value and temperatureof the solution have been discussed briefly.
