中文摘要：

以水杨醛（邻羟基苯甲醛）接枝壳聚糖为基础制备出质子化改性壳聚糖，研究其对硫酸根离子（SO24-）的吸附性能。通过静态吸附实验进行了吸附条件的优化以及吸附等温方程研究，用扫描电镜（SEM）和红外光谱（FTIR）对产物进行了表征，并对吸附机理进行了初步探讨。优化的吸附条件为：吸附时间为40min，SO24-溶液初始浓度500mg／L，pH值为5．0，反应温度为35℃；吸附等温方程研究表明，吸附过程符合Langmuir型，吸附容量为107．53mg／g。SEM和红外光谱分析表明：SO24- 主要是被吸附到壳聚糖的氨基上的。

英文摘要：

Chitosan was chemically modified by protonation after grafted with salicylaldehyde and the resul- ting product employed as absorbent to remove sulfate in this study. Batch experiments were conducted to investi- gate the conditions of the adsorption and adsorption isotherms, and the structure of product was characterized by means of SEM and FTIR,also the mechanism of adsorption was explored. The optimized conditions of adsorption were as follows： the equilibrium time of 40 rain, the initial sulfate ions concentration of 500 mg/L, the tempera- ture of 35℃ and the pH value of 5. Adsorption isotherms showed that equilibrium adsorption data followed Lang- muir＇s isotherm and the adsorption capacity reached to 107.53 mg/g. The SEM and FTIR indicated that electro- static attraction was the main driving force for sulfate adsorntion.