Abstract: The chitosan membrane,which was prepared by solvent evaporation method,immersed in ferric chloride solution and subjected to shaking adsorption for Fe³⁺ (CS-Fe),has been used for the successive adsorption for Cr(Ⅵ) from water. The membrane has been characterized by means of SEM and FT-IR,and the influence of various factors on the adsorption effect discussed. The results shows that the maximum adsorption capacity can reach 252.6 mg/g,which is 2.1 times of the adsorptive capacity of chitosan membrane. The adsorption reached equilibrium within 60 min. The adsorption isotherm conforms to both Langmuir model and Freundlich model. The adsorption kinetics conforms to pseudo second-order kinetic model. After three times of recycling,the adsorption capacity still can reach 113 mg/g.

Key words: chitosan membrane, successive adsorption, Cr(Ⅵ), regeneration

摘要： 将通过溶剂蒸发法制备的壳聚糖膜（CS）转移至氯化铁溶液中震荡吸附Fe³⁺（CS-Fe），用于连续吸附废水中的Cr（Ⅵ）。利用SEM、FT-IR对其进行表征，并探讨了各因素对吸附效果的影响，结果表明吸附容量最大可达252.6 mg/g，是壳聚糖膜吸附量的2.1倍。吸附在60 min内达到平衡，吸附等温线既符合Langmuir模型，也符合Freundlich模型。吸附动力学符合拟二阶动力学模型。3次循环使用后，吸附量仍可达到113 mg/g。

关键词: 壳聚糖膜, 连续吸附, Cr(Ⅵ), 再生

CLC Number: 

• TQ424