阴离子β-CD磁性微球吸附铜离子的工艺优化

Process optimization of adsorpting Cu^(2+) with anionic β-CD magnetic microspheres

采用Na3P3O9和Fe3O4对β-环糊精(β-CD)微球进行改性,制备出阴离子β-CD磁性微球吸附剂,并用来吸附铜离子。采用光学显微镜和扫描电镜对其形貌进行观察,并进行粒度测定,结果表明,吸附剂呈较好的球形,粒径较改性前有所增大。通过L9(34)正交实验得到吸附工艺优方案为:吸附温度35℃,吸附时间1.5h,超声功率100%,m(阴离子β-CD磁性微球)∶V(Cu2+)=1∶40,此条件下吸附量和Cu2+除去率平均值可分别达到2.691mmol/g、96.26%,各因素对反应影响的大小顺序依次为温度、投料比、超声功率、时间。

Anionic β-CD magnetic microspheres （β- CDMM）were successfully synthesized withβ-CD microspheres modified by Na3 Pa O9 and Fea O4. Its adsorptive property on Cu2＋ was studied. Its morphology and particle size were meas- ured. And the adsorption process was optimized through the L9 （34） orthogonal experimental design. The results showed that the optimum adsorption conditions were as follows：temperature was 35℃, time Was 1.5 h, ultrasonic power was 100 and m（β-CDMM） ： V（Cu2＋ ）was 1 ： 40g/mL. Under these conditions,the average adsorption capacity and removal rate can reach 2. 691mmol/g and 96.26% respectively. The order of influence factors were adsorption temperature, rate of raw material, ultrasonic power, time.