镧离子印迹聚合物La-IIP/P-SBA-15的制备及其吸附性能  

Preparation and adsorption properties of Lanthanum ion imprinted polymer LA-IIP/P-SBA-15

作　　者：黄玉华[1] 黎先财[1] 施敏鑫 覃苑苑 HUANG Yuhua;LI Xiancai;SHI Minxin;QIN Yuanyuan(School of Chemistry and Chemical Engineering,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学化学化工学院,江西南昌330031

出　　处：《南昌大学学报（理科版）》2022年第5期550-556,共7页Journal of Nanchang University(Natural Science)

基　　金：国家自然科学基金资助项目(51664042)。

摘　　要：选用聚乙烯亚胺为功能单体,以磷酸改性的SBA-15为载体,制备了镧离子印迹聚合物La-IIP/P-SBA-15。对其做了相关表征,系统地研究其对低浓度镧离子吸附性能的影响,并进行了一系列静态吸附实验,研究了吸附时间、温度、初始浓度和pH对吸附的影响。结果表明,在pH=5、T=308 K的条件下,在5 min后达到吸附平衡,最大吸附量为544.14 mg·g^(-1)。吸附过程符合Langmuir吸附模型,在具有相似性质的干扰离子存在下,La-IIP/P-SBA-15对La(Ⅲ)具有较强的选择性。The lanthanum imprinted polymer La-IIP/P-SBA-15 was prepared by using the polyethylene imine as functional monomer and the phosphoric acid modified SBA-15 as carrier.The characterization of La-IIP/P-SBA-15 was presented and the low concentration of lanthanum ion adsorption performance was studied.A series of static adsorption experiments were carried out to study the influence of the adsorption time,the temperature,the initial concentration and the pH on the adsorption.The results showed that under the conditions of pH=5 and T=308 K,the adsorption equilibrium was reached after 5min,and the maximum adsorption capacity was 544.14 mg·g^(-1).The adsorption process conforms to Langmuir adsorption model,and La-IIP/P-SBA-15 has a strong selectivity for La(III)in the presence of interfering ions with similar properties.

关 键 词：离子印迹技术 磷酸改性 吸附 

分 类 号：O611.4[理学—无机化学]