桔皮纤维素基Cl-印迹聚合物合成及性能研究

Study on the Synthesis and Properties of Cellulose-Based Cl-Imprinted Polymer Orange Peel

采用浸提后的桔皮粉残渣合成了1种桔皮基Cl印迹聚合物,进行了吸附、再生性能研究。结果表明,利用质量比1:1丙烯酰胺和乙烯基咪唑接枝的聚合物吸附容量最高,为21.1 mg/g,吸附过程符合langmuir模型。干扰离子F与Cl的摩尔比从0.2:1上升到1:1时,识别率从87%降至81%,吸附稳定时间为14 min。优化再生剂为1 mol/L的NaOH溶液,比耗为15.6。电再生时,该聚合物分别进行单独再生和与阳离子协同再生,恢复吸附容量分别为18.96 mg/g和18.05 mg/g,目标离子回收率92.5%和88.9%。

An Cl-imprinted polymer based on orange peel had been synthesized from the extracted orange peel powder residue.Then,the performance of adsorption and regeneration research had been carried out.The results showed that the polymer grafted with acrylamide and vinyl imidazole at the mass ratio of 1:1 had the highest adsorption capacity of 21.1 mg/g.The adsorption isotherm conformed to the Langmuir model.When the interfering ion F-ratio increased from 0.2:1 to 1:1,the recognizing rate decreased from 87%to 81%,and the adsorption stabilization time was 14 min.The optimized regenerant was a 1 mol/L NaOH solution with a specific consumption was 15.6.During electrical regeneration,the polymer was separately regenerated and synergistically regenerated with the other cation imprinted polymer.The recovery adsorption capacities were 18.96 mg/g and 18.05 mg/g,respectively,and the target ion recovery rates were 92.5%and 88.9%,respectively.