Abstract

Tannin-immobilized cellulose was prepared by the phenolic reaction of the phenol ring of tannin with the aldehyde group of aldocellulose, where aldocellulose was prepared by the oxidization of cellulose with sodium periodate as oxidizing agent. The method of immobilized tannin is environmentally friendly due to the lack of crosslinking agent. The adsorption properties of cellulose were improved due to the introduction of tannin. The maximum adsorption capacity of the tannin-immobilized cellulose for berberine hydrochloride was 143.66 mg/g. The isothermal adsorption for berberine hydrochloride conformed to the Langmuir model well. The adsorption of tannin-immobilized cellulose for berberine hydrochloride was a weak chemical adsorption, and the adsorption process was exothermic. The adsorption equilibrium was reached within 90 min in the initial concentration 100 mg/L, and the sorption kinetics fitted well to a pseudo-first-order model. Tannin-immobilized cellulose has potential application prospect in the field of the separation and purification of alkaloids.

摘要

鞣质固定化的纤维素是通过鞣质的酚环与醛纤维素的醛基的酚反应而制得的，其中醛纤维素是通过用高碘酸钠作为氧化剂将纤维素氧化而制备的。由于缺少交联剂，固定化单宁的方法对环境友好。由于单宁的引入，改善了纤维素的吸附性能。单宁固定化纤维素对盐酸小ber碱的最大吸附容量为143.66 mg / g。盐酸小ber碱的等温吸附符合Langmuir模型。单宁固定化纤维素对盐酸小ber碱的吸附是弱化学吸附，且吸附过程是放热的。在初始浓度为100 mg / L的情况下，在90分钟内达到吸附平衡，并且吸附动力学很好地拟合拟一级模型。单宁固定化纤维素在生物碱的分离和纯化领域具有潜在的应用前景。