凹凸棒粘土负载壳聚糖的脱色作用研究

摘要

A decolorizer of attapulgite-supported chitosan was made.Its decoloriation ability of direct scarlet and direct dark blue was carried out in contrast to chitosan.It was observed that the former was superior to the latter and the former＇s adsorption could%将壳聚糖醋酸溶液与凹凸棒粘土混合制得一种凹凸棒粘土负载壳聚糖的脱色剂.用它与未负载壳聚糖的凹土对直接大红和直接深蓝染料水溶液进行了脱色比较试验.结果表明,复合脱色剂比单一的凹土和壳聚糖对该染料的吸附率高,可达98%以上.还对负载壳聚糖的脱色剂进行X-射线分析,进一步讨论了其改性机理,并对实验数据进行线性拟合,证明吸附行为符合Langmuir和Freundlich等温吸附模式.