大孔树脂对贯叶连翘中金丝桃素的静态吸附

The static adsoption of hypericin in Hypericum perforatum L. using macroporous resins

摘要:

考察了18种不同类型的大孔树脂对贯叶连翘中金丝桃素的静态吸附和解吸效果，并对三种效果较好的树脂进行了吸附动力学研究；比较了上样液pH值对吸附效果的影响；探讨了NKA-9树脂在25 ℃等温吸附过程，并应用Langmuir方程进行了拟合。结果表明：弱极性树脂NKA-9对金丝桃素吸附解吸作用最好，到达吸附平衡时间为1 h左右，吸附量可达12.45 mg/g（干树脂)。上样液最佳pH＝4，上样液pH值对树脂的吸附有很大影响。NKA-9树脂对金丝桃素的吸附为单分子吸附，符合Langmuir吸附理论。

Abstract:

In present study, the characteristics of eighteen macroporous resins for the static adsorption and desorption of hypericin from Hypericum perforatum L.extracts have been evaluated. And then the effect of different pH values of extract solution on the adsorption capacities of hypericin on NKA-9 resin has been explored. The Langmuir isotherm was used to describe the interactions between solutes and resins at 25℃. The results showed that a week polar resin, NKA-9, with the adsorption capacity of 12.45 mg/g (dry resin) offered the higher adsorption and desorption capacity for hypericin than other resins. The pH had a great effect on the adsorption process, and the optimum pH was 4. The adsorption process of NKA-9 at 25℃fit best to the Langmuir isotherm, proved to be single molecule adsorption.