Article
Engineering, Electrical & Electronic
M. Aghdasi, M. Nazari, Sareh Yonesi
Summary: DEP force is used to manipulate particles in microfluidic systems, with the frequency of the applied electric field affecting the force. This study utilizes two electric fields with different frequencies to simultaneously separate and trap particles, and achieves double-trapping of particles. The optimal voltages for the electrodes are determined and an additional vial is incorporated to enable double-trapping of particles with varying sizes and properties. The performance of the system is assessed for the first time, and the optimal values for intelligent separations are identified.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2023)
Article
Engineering, Environmental
Zeynep Cicek, Alejandro Agudelo Mira, Qingqing Huang
Summary: The study developed a separation approach to recover rare earth elements (REEs) from AMD treatment sludge. Parametric leaching tests were conducted to determine optimum leaching conditions. Stage-wise precipitation tests were applied to illustrate precipitation behaviors. Selective removal of impurities and enhancement of rare earth oxide purity were achieved through solvent extraction methodologies. The developed process produced a mixed rare earth product with a purity of 80% by weight.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Chemistry, Applied
Mory Traore, Aijun Gong, Yiwen Wang, Lina Qiu, Yuzhen Bai, Weiyu Zhao, Yang Liu, Yi Chen, Ying Liu, Huilin Wu, Shuli Li, Yueyi You
Summary: Strategical elements, such as rare earth elements, play a crucial role in various industries, particularly in the production of high-tech materials. Global industries heavily rely on rare earth materials, especially for innovations in modern technology, green energy, and communications technology. This article provides a review of advances in rare earth separation methods and techniques, offering guidance on the best extractants depending on leaching conditions and the desired final product. The paper evaluates the strengths and weaknesses of different methods and technical extractants, considering the mechanism and interaction of rare earth elements.
JOURNAL OF RARE EARTHS
(2023)
Review
Engineering, Environmental
Ziying Chen, Zhan Li, Jia Chen, Parashuram Kallem, Fawzi Banat, Hongdeng Qiu
Summary: With the rapid development of the rare earth industry, the demand for rare earth elements continues to rise, making high-purity separation of rare earth elements particularly important. The article summarizes the latest developments and advantages and disadvantages of rare earth element separation technologies, and looks ahead to future prospects.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Huajun Yang, Fang Peng, Danielle E. Schier, Stipe A. Markotic, Xiang Zhao, Anh N. Hong, Yanxiang Wang, Pingyun Feng, Xianhui Bu
Summary: Selective crystallization into metal-organic frameworks (MOFs) presents new opportunities for rare-earth separation. The development of MOF platforms with high selectivity toward target ions, such as the CPM-66 platform, shows exceptional ion-size selectivity during crystallization. This work provides insights into preparing low-coordinate MOFs for efficient lanthanide separation and other applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Engineering, Chemical
Hao Su, Shuainan Ni, Chenhao Liu, Xiaoqi Sun
Summary: In this study, four fatty acid-based ionic liquids were synthesized to remove aluminum impurities in ion-adsorption rare earth ores. One specific ionic liquid, [methyltrioctylammonium][neodecanoate], showed better extraction and separation performance for aluminum. A process combining fractional extraction and extraction-precipitation was developed to remove impurity ions in the leaching solution of magnesium sulfate and achieve high concentration rare earth chloride product with high purity.
MINERALS ENGINEERING
(2023)
Review
Materials Science, Multidisciplinary
Mina Shirzadi-Ahodashti, Sobhan Mortazavi-Derazkola, Mohammad Ali Ebrahimzadeh
Summary: Nanostructures composed of rare earth oxides, such as Ho2O3 and Nd2O3, have desirable characteristics, with neodymium oxides known for their distinctive electrical and optical properties. The synthesis of Ho2O3 and Nd2O3 nanostructures through different techniques is comprehensively described and examined in this review.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Environmental
Chao Bie, Shan Wu, Hepeng Zhang, Shuainan Ni, Yun Gao, Xiaoqi Sun
Summary: In this study, a novel oil-soluble oxamic acid extractant was synthesized to separate rare earth (RE) and thorium (Th) from radioactive waste residue. The extractant exhibited high selectivity and good oil solubility, making it suitable for extraction under low acidity. Through multiple extraction and scrubbing processes, the concentration of Th in the radioactive slag was reduced and the recovery of RE was high.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Analytical
Raul Fernandez-Mateo, Victor Calero, Hywel Morgan, Antonio Ramos, Pablo Garcia-Sanchez
Summary: This paper investigates stationary electroosmotic flows of electrolytes around insulating constrictions induced by low frequency AC electric fields, introducing the concept of concentration-polarization electroosmosis. Experimental results are in qualitative agreement with the model predictions, but trapping of particles in shallow channels is also observed.
ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Chemical
Chenhao Liu, Hepeng Zhang, Bing Luo, Liqing Li, Xiaoqi Sun
Summary: The extraction-precipitation method using N-lauroyl sarcosine as the precipitant shows a specific precipitation ability for rare earth, and a new enrichment process for bastnaesite leachate is developed to effectively remove impurities and reduce energy consumption and carbon emission.
MINERALS ENGINEERING
(2022)
Article
Engineering, Chemical
Bangyu Fan, Fujian Li, Yanyan Cheng, Zhongzhi Wang, Nian Zhang, Qingrong Wu, Lu Bai, Xiangping Zhang
Summary: The separation of rare earth elements has been a challenge due to their chemical and physical similarities. A new method using magnetic field-enhanced crystallization has been developed to efficiently separate these elements at room temperature and pressure.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Bangyu Fan, Fujian Li, Yanyan Cheng, Zhongzhi Wang, Nian Zhang, Qingrong Wu, Lu Bai, Xiangping Zhang
Summary: The separation of rare earth elements has always been challenging due to their similar chemical and physical properties. A potential alternative method called magnetic separation, which utilizes the difference in magnetic moment, has shown efficient separation of rare earth elements at room temperature and pressure.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Hao Su, Shuainan Ni, Chao Bie, Shan Wu, Xiaoqi Sun
Summary: This article introduces the application of a new ionic liquid [N-1888][NDA] in the separation of rare earth elements. By studying its extraction capacity, stripping property, and recycling stability, an efficient separation process for yttrium was developed. The experimental results showed that this process has a high separation factor and can produce high-purity yttrium without the use of salting-out reagents.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Weiguo Pan, Li Chen, Yitan Wang, Yongsheng Yan
Summary: The study focused on the application of Y ion-imprinted electrospun membranes (Y-IIEMs) for the treatment of low-concentration rare earth wastewater. By applying high efficient ligand-inducing and aqueous phase ion-imprinting, effective separation of heavy rare earth ion Y (III) was achieved, demonstrating good stability and reuse performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Materials Science, Multidisciplinary
Jing Qiao, Lutong Li, Jiurong Liu, Na Wu, Wei Liu, Fan Wu, Zhihui Zeng
Summary: Rare earth plays a crucial role in electromagnetic wave absorption materials, and the strategies of doping rare earth elements and constructing rare earth oxide composites are important for the fabrication of high-efficiency electromagnetic wave absorption materials. This review provides a comprehensive summary of the research background, classification, features, progress, and future development of rare earth electromagnetic wave absorption materials, offering guidance for future development.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)