聚（6-丙烯酰氨基己基异羟肟酸）树脂对La(III)、Ce(III)和Y(III)的吸附性能

Adsorption Properties for La(III), Ce(III), and Y(III) with Poly(6-acryloylamino-hexyl hydroxamic acid) Resin.

作者信息

Cao Xiaoyan, Zhou Chunjie, Wang Shuai, Man Ruilin

机构信息

College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, China.

College of Chemistry and Chemical Engineering and Jiangxi Province Engineering Research Center of Ecological Chemical Industry, Jiujiang University, Jiujiang 332005, China.

出版信息

Polymers (Basel). 2020 Dec 22;13(1):3. doi: 10.3390/polym13010003.

DOI:10.3390/polym13010003

PMID:33374966

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7792598/

Abstract

Using polyacrylic resin followed by the substitution reaction with 6-aminohexyl hydroxamic acid, poly(6-acryloylamino-hexyl hydroxamic acid) resin (PAMHA) was successfully synthesized. PAMHA, a spherical resin with the particle size of 0.4 mm, is a novel polyamide hydroxamic acid chelating resin containing acylamino and hydroxamic acid functional groups. A series of influences (pH, contact time, temperature, and the initial concentrations of rare earth ions) were investigated to determine the adsorption properties. The adsorption capacity for La(III), Ce(III), and Y(III) ions were 1.030, 0.962, and 1.450 mmol·g, respectively. Thermodynamic and kinetic studies were also carried out to show that the uptake of rare earth ions onto PAMHA fitted well the pseudo-second-order model and Langmuir isotherm, and the adsorption process was spontaneous endothermic. In addition, desorption of rare earth ions was achieved by using 2 mol·L HNO and desorption efficiencies for La(III), Ce(III), and Y(III) ions were 98.4, 99.1, and 98.8%, respectively. Properties of PAMHA resin were characterized by scanning electron microscope (SEM), Fourier transform infrared spectrometry (FTIR), and X-ray photoelectron spectrometer (XPS). The results showed that there was coordination between the rare earth ions with PAMHA and rare metal ions were chemically adsorbed on the surface of the PAMHA.

摘要

通过使用聚丙烯酸树脂，然后与6-氨基己基异羟肟酸进行取代反应，成功合成了聚（6-丙烯酰氨基己基异羟肟酸）树脂（PAMHA）。PAMHA是一种粒径为0.4毫米的球形树脂，是一种新型的含有酰氨基和异羟肟酸官能团的聚酰胺异羟肟酸螯合树脂。研究了一系列影响因素（pH值、接触时间、温度和稀土离子的初始浓度）以确定其吸附性能。对La(III)、Ce(III)和Y(III)离子的吸附容量分别为1.030、0.962和1.450 mmol·g。还进行了热力学和动力学研究，结果表明稀土离子在PAMHA上的吸附很好地符合准二级模型和朗缪尔等温线，且吸附过程是自发吸热的。此外，通过使用2 mol·L的HNO实现了稀土离子的解吸，La(III)、Ce(III)和Y(III)离子的解吸效率分别为98.4%、99.1%和98.8%。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和X射线光电子能谱仪（XPS）对PAMHA树脂的性能进行了表征。结果表明，稀土离子与PAMHA之间存在配位作用，稀土金属离子化学吸附在PAMHA表面。