活性炭及羟基化多壁碳纳米管对大鲵酶解液的吸附性能比较

Comparison of Adsorption Properties of Active Carbon and Hydroxylated Multi Walled Carbon Nanotubes on the Hydrolysates of Giant Salamander

摘要: 活性炭及羟基化多壁碳纳米管均具有良好的吸附性能。为促进大鲵蛋白产品的进一步开发，为大鲵酶解液在食品及医药领域的应用提供理论依据，实验采用大鲵酶解液作为底物，探究活性炭及羟基化多壁碳纳米管对大鲵酶解液中的腥苦味成分的吸附能力，比较两种材料的吸附性能差异，优化脱腥脱苦工艺。试验结果表明，活性炭吸附法最佳条件下OD₂₂₀/OD280值为10.6576，蛋白质回收率为80.52%，而羟基化多壁碳纳米管吸附法最佳条件下OD220/OD280值为23.9990，蛋白质回收率为71.63%。活性炭和羟基化多壁碳纳米管对疏水性氨基酸均有良好的吸附效果，活性炭吸附法对蛋白质的损耗较羟基化多壁碳纳米管吸附法小，但羟基化多壁碳纳米管的吸附性能和选择性能力比活性炭更好，羟基化多壁碳纳米管的脱苦脱腥能力较强。

Abstract: Activated carbon and hydroxylated multi walled carbon nanotubes have good adsorption properties. In order to promote the further development of protein products of giant salamander and provide theoretical basis for the application of enzymatic hydrolysate of giant salamander in the field of food and medicine, the enzymatic hydrolysate of giant salamander was used as substrate in the experiment, and the adsorption capacity of activated carbon and hydroxylated multi walled carbon nanotubes for the bitter and fishy components in the hydrolysate of giant salamander (Andrias davidianus) was studied. The results showed that under the optimum conditions of activated carbon adsorption, the 220/OD280 was 10.6576, and the protein recovery was 80.52%, while under the optimum conditions of hydroxylated multi walled carbon nanotubes adsorption, the 220/OD280 was 23.9990, the protein recovery was 71.63%. Both active carbon and hydroxylated multi walled carbon nanotubes have good adsorption effects on hydrophobic amino acids, and the loss of protein by activated carbon adsorption method is smaller than that by hydroxylated multi walled carbon nanotubes adsorption method. However, the adsorption and selectivity of hydroxylated multi walled carbon nanotubes were better than that of activated carbon, and the hydroxylated multi walled carbon nanotubes had better ability to remove bitterness and odor.