大孔树脂对木瓜酒单宁的吸附性能研究

Research on Absorption of Tannin from Chinese Quince Wine by Magropous Absorbent Resins

以木瓜酒中单宁含量为指标,通过静态吸附试验从5种大孔树脂中筛选出HPD-100树脂,其吸附容量为每克干树脂吸附72.15 mg单宁。考察HPD-100树脂的吸附、解吸效果及其影响因素。结果表明,吸附最佳条件为pH6.0,静态吸附4 h;动态吸附流速为2.0 BV/h,吸附体积达到5 BV时为吸附终点,吸附率为89.5%。静态解吸附最佳条件为洗脱液pH 7.0,洗脱时间6 h,洗脱乙醇浓度75%;动态解吸附流速为1.0 BV/h,解吸附体积达到1.6 BV时为解吸附终点,解吸附率为68.6%。HPD-100大孔吸附树脂对木瓜酒单宁具有良好富集作用,适于木瓜酒涩味的去除或单宁的分离纯化。

Taking the contents of tannin as index, five types of macroporous absorbent resin were used for absorption of tannin from Chinese quince wine. Static adsorption experiments showed that macroporous resin HPD-100 had the highest adsorption capacity of 72.15 mg （tannin）/g （dry resin）. Effects of some factors on the adsorption and desorption ability were studied. Ttle results showed that the optimal pH of adsorption was 6.0 and the static adsorption time was 4 h. In dynamic experiments, the optimal flow rate of Chinese quince wine was 2.0 BV/h and the adsorption volume was 5 BV with the adsorption rate of 89.5 % attained. The optimum static desorption conditions were pH 7.0, elute-ethanol concentration 75 %, elution time 6 h. Dynamic desorption experiments showed that the elution rate was 1.0 BV/h and elute volume was 1.6 BV. Under the conditions, desorption rate was 68.6 %. It was showed that tannin could be adsorpted effectively by macroporous resin HPD- 100 and that is suitable for removing and purification of tannin from Chinese quince wine.