β-环糊精准聚轮烷对钍的吸附性能研究

Adsorption of Trace Thorium(Ⅳ) Using β-cyclodextrin Inclusion Complex of Polyurethane

以β-环糊精和聚醚胺(β-CD-PPG-NH2)为原料合成β-环糊精准聚轮烷,通过红外光谱、核磁共振氢谱、热重分析对合成材料进行了表征,验证了材料合成的可靠性。并用可见分光光度法探究吸附反应时间、p H值、吸附剂用量对吸附钍离子的影响。结果表明,β-环糊精准聚轮烷对钍的吸附效果好,探索出吸附的最佳条件为:p H值=3.5,震荡时间80min,吸附剂用量20 mg时,吸附容量可达11.13 mg/g。

The adsorption of thorium was studied using a polyrotaxane,which was obtained by the reaction of PPG- NH2 and 6 - β - CD. IR, HNMR and TG was used to analyze the experimental mate - rials to confirm the reliability of the synthetic material, The adsorption of were examined as a func - tion of the contact time, pH and adsorbent dose using batch adsorption experiments. The experim - ental results showed that the optimum conditions were as follow： pH = 3.5, contact time is 80 min and adsorbent dose is 20 mg. The equilibrium adsorption capacity were found to be 11.13 mg/g.