壳聚糖-牡蛎壳粉复合微球的制备及对铜离子吸附性能

SYNTHESIS OF CHITOSAN-OYSTER SHELL POWDER COMPOSITE MICROSPHERES AND ABSORPTION OF CUPRICION

以对重金属离子具有良好吸附性能的牡蛎壳粉和壳聚糖为原料,采用反相悬浮聚合法制备了具有介孔结构的壳聚糖-牡蛎壳粉复合微球。通过红外光谱和扫描电镜,结合比表面积测试和孔径分析对复合微球结构进行了表征。实验考察了复合微球用量、铜离子初始浓度和吸附时间对其吸附性能的影响。结果表明:在复合微球用量为0.1g、初始铜离子浓度为100mg/L、吸附时间为150min条件下,复合微球吸附容量为46.58mg/g,脱除率达93.15%。经过5次重复使用后,复合微球的吸附容量为38.12 mg/g,脱除率为76.24%。

The chitosan-oyster shell powder composite microspheres were synthetized by inverse suspension polymerization,using chitosan and oyster shell powder as raw materials with heavy metals adsorption capacity.The structures of composite microspheres were characterized through FTIR and SEM.Furthermore,the results of specific surface area and pore analysis were combined to prove the successfully synthesized of composite microspheres with Mesoporous.The influence of composite microspheres amounts,initial concentration of Cu2+(C0)and absorbed time on adsorption property were discussed.The results showed the adsorption capacity was 46.58 mg/g,and the removal rate was93.15%,when composite microspheres amounts was 0.1 g,C0 was 100 mg/L and absorbed time was150 min.In the same experiment conditionthe,the adsorptive properties were better than those of chitosan and oyster shell powder.Further studied on the performance of recycling,the result showed that the adsorption capacity and the removal rate were only down to 38.12 mg/g and 76.24% after five cycles,respectively.