壳聚糖对活性黑RL的吸附动力学研究

Study on Adsorption Kinetics of Chitosan to Reactive Black RL

研究了壳聚糖（CS）对活性黑RL的吸附性能。在吸附温度为298K、CS相对分子质量为1．75×10^5、CS加入量为102mg/L的条件下，cs对活性黑RL的吸附量为146．23mg/g。该吸附过程符合拟二级动力学吸附模型；吸附平衡数据可用Freundlich方程进行关联。cs对活性黑RL的吸附过程中，温度对吸附速率的影响符合Arrhenius方程，吸附活化能为70．4kJ／mol，表明cs对活性黑RL的吸附主要是化学吸附。

The adsorption capability of chitosan （CS） to reactive black RL was investigated. Under the conditions of adsorption temperature 298 K, CS relative molecular weight 1. 75×105 and CS dosage 102 mg/L, the adsorption capacity of CS to reactive black RL is 146.23 mg/g. The adsorption process accords with the pseudo-second-order kinetic model and the adsorption equilibrium data accord with Freundlich equation. The effect of temperature on adsorption rate accords with Arrhenius equation, and the activation energy of adsorption is 70.4 kJ/mol. It indicates that the adsorption of reactive black RL on CS is a chemical process primarily.