Adsorption of neodymium,terbium and dysprosium using a synthetic polymer-based magnetic adsorbent  

作　　者：Hamedreza Javadian Mehdi Taghavi Montserrat Ruiz Inderjeet Tyagi Majid Farsadrooh Ana Maria Sastre 

机构地区：[1]Department of Chemical Engineering,ETSEIB,Universitat Politècnica de Catalunya,Diagonal 647,08028,Barcelona,Spain [2]Department of Chemistry,Faculty of Science,Shahid Chamran University of Ahvaz,61357-43337,Iran [3]Department of Chemical Engineering,EPSEVG,Universitat Politècnica de Catalunya,Av.Víctor Balaguer,s/n,08800,Vilanova i la Geltrú,Spain [4]Centre for DNA Taxonomy,Molecular Systematics Division,Zoological Survey of India,Kolkata,700053,India [5]Renewable Energies Research Laboratory,Department of Chemistry,Faculty of Science,University of Sistan and Baluchestan,P.O.Box 98135674,Zahedan,Iran

出　　处：《Journal of Rare Earths》2023年第11期1796-1804,I0006,共10页稀土学报（英文版）

基　　金：Project supported by the Spanish Ministry of Economy and Competitiveness (CTM2017-83581-R)。

摘　　要：In this study,a polyamide with methine-thiophene and pyrimidine linkages(poly(pyrimidine-thiophene-amide)(PPTA))was synthesized.Then,magnetic PPTA(M-PPTA)was synthesized using the hydrothermal technique.The products were analyzed by Fourier-transform infrared spectroscopy(FTIR),nuclear magnetic resonance(NMR),X-ray diffraction(XRD),thermogravimetric analysis(TGA),field-emission scanning electron microscopy(FE-SEM),and a vibrating-sample magnetometer(VSM).The nanocomposite exhibits a saturation magnetization of 50.44 emu/g recorded by VSM analysis.The ability of M-PPTA to bind dysprosium(Dy^(3+)),terbium(Tb^(3+)),and neodymium(Nd^(3+))was investigated.Using 0.15 g of M-PPTA to test the adsorption of the rare earth elements(50 mg/L)at pH=5.5,the percentage of adsorption for Dy^(3+),Tb^(3+),and Nd^(3+)is 98.41%,97.48%and 95.67%,respectively.Pseudo-second-order(PSO)significantly fits the adsorption kinetic data.Freundlich equation was used to describe the adsorption equilibrium data of Dy^(3+)and Tb^(3+),while Langmuir model was used to simulate Nd^(3+)adsorption data.Increasing the temperature leads to an increase in the performance of M-PPTA,and an endothermic adsorption process was confirmed by the positive values ofΔH.After four adsorption-desorption cycles,the efficiency of adsorption of Dy^(3+),Tb^(3+),and Nd^(3+)by M-PPTA is88.75%,86.37%,and 84.64%,respectively.An antagonism effect is observed for the adsorption of the individual ions in a ternary solution.

关 键 词：Polyamide LANTHANIDES Magnetic nanocomposite ADSORPTION Rare earth elements 

分 类 号：O64[理学—物理化学]