Selective separation of rare earth ions from aqueous solution using functionalized magnetite nanoparticles: kinetic and thermodynamic studies

被引：128
作者：
Ashour, Radwa M. [1 ,2 ]
El-Sayed, Ramy [3 ]
Abdel-Magied, Ahmed F. [2 ]
Abdel-Khalek, Ahmed A. [4 ]
Ali, M. M. [2 ]
Forsberg, Kerstin [5 ]
Uheida, A. [1 ]
Muhammed, Mamoun [6 ]
Dutta, Joydeep [1 ]
机构：
[1] SCI Sch, Funct Mat Appl Phys Dept, Isafjordsgatan 22, SE-16440 Stockholm, Sweden
[2] Nucl Mat Author, POB 530, Cairo, Egypt
[3] Karolinska Inst, Dept Lab Med, Novum, Expt Canc Med,KFC, S-14186 Stockholm, Sweden
[4] Beni Suef Univ, Fac Sci, Dept Chem, Bani Suwayf, Egypt
[5] KTH Royal Inst Technol, Dept Chem Engn, S-10044 Stockholm, Sweden
[6] Alexandria Univ, Inst Grad Studies & Res, Alexandria, Egypt
来源：
CHEMICAL ENGINEERING JOURNAL | 2017年 / 327卷
关键词：
Magnetic nanoparticles; Rare earths; Functionalization; Citric acid; L-cysteine; Adsorption; HEAVY-METAL IONS; ATOMIC EMISSION-SPECTROMETRY; IRON-OXIDE NANOPARTICLES; SOLID-LIQUID EXTRACTION; ONLINE PRECONCENTRATION; FE3O4; NANOPARTICLES; EFFICIENT REMOVAL; TITANIUM-DIOXIDE; LANTHANUM III; ADSORPTION;
D O I：
10.1016/j.cej.2017.06.101
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Separation of rare earth ions (RE3+) from aqueous solution is a tricky problem due to their physicochemical similarities of properties. In this study, we investigate the influence of the functionalized ligands on the adsorption efficiency and selective adsorption of La3+, Nd3+, Gd3+ and Y3+ from aqueous solution using Magnetite (Fe3O4) nanoparticles (NPs) functionalized with citric acid (CA@Fe3O4 NPs) or L-cysteine (Cys@Fe3O4 NPs). The microstructure, thermal behavior and surface functionalization of the synthesized nanoparticles were studied. The general adsorption capacity of Cys@Fe3O4 NPs was found to be high (98 mg g (1)) in comparison to CA@Fe3O4 NPs (52 mg g (1)) at neutral pH 7.0. The adsorption kinetic studies revealed that the adsorption of RE3+ ions follows a pseudo second-order model and the adsorption equilibrium data fits well to the Langmuir isotherm. Thermodynamic studies imply that the adsorption process was endothermic and spontaneous in nature. Controlled desorption within 30 min of the adsorbed RE3+ ions from both Cys@Fe3O4 NPs and CA@Fe3O4 NPs was achieved with 0.5 M HNO3. Furthermore, Cys@Fe3O4 NPs exhibited a higher separation factor (SF) in the separation of Gd3+/La3+, Gd3+/Nd3+, Gd3+/Y3+ ions compared to CA@Fe3O4 NPs. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：286 / 296
页数：11
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