Recovery of Rare Metal Ions

2019 ◽  
pp. 73-83
Author(s):  
Kouichi Kuroda
Keyword(s):  
Metal Ions ◽  
Rare Metal

scholarly journals Preparation of a Novel Polystyrene-Poly(hydroxamic Acid) Copolymer and Its Adsorption Properties for Rare Earth Metal Ions

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1905 ◽  
Author(s):  
Xiaoyan Cao ◽  
Qing Wang ◽  
Shuai Wang ◽  
Ruilin Man
Keyword(s):  
Rare Earth ◽  
Metal Ions ◽  
Surface Area ◽  
Hydroxamic Acid ◽  
Earth Metal ◽  
Rare Metal ◽  
Rare Earth Ions ◽  
Area Measurement ◽  
Bet Surface Area ◽  
Acid Copolymer

In this study, a novel polystyrene-poly(hydroxamic acid) copolymer was synthesized as an effective adsorbent for the treatment of rare earth elements. Through the use of elemental analysis as well as FTIR, SEM, XPS, and Brunauer-Emmett-Teller (BET) surface area measurement, the synthesized polymer was found to have a specific surface area of 111.4 m2·g−1. The adsorption performances of rare metal ions were investigated under different pH levels, contact times, initial concentrations of rare earth ions, and temperatures. The adsorption equilibrium for La3+, Ce3+, and Y3+ onto a polystyrene-poly(hydroxamic acid) copolymer is described by the Langmuir model, which confirms the applicability of monolayer coverage of rare earth ions onto a polystyrene-poly(hydroxamic acid) copolymer. The amount of adsorption capacities for La3+, Ce3+, and Y3+ reached 1.27, 1.53, and 1.83 mmol·g−1 within four hours, respectively. The adsorption process was controlled by liquid film diffusion, particle diffusion, and chemical reaction simultaneously. The thermodynamic parameters, including the change of Gibbs free energy (∆G), the change of enthalpy (∆H), and the change of entropy (∆S), were determined. The results indicate that the adsorption of resins for La3+, Ce3+ and Y3+ was spontaneous and endothermic. The polymer was also used as a recyclable adsorbent by the desorption experiment.

scholarly journals Synthesis of a Metal Ion Adsorbent from Banana Fibers and Its Adsorption Properties for Rare Metal Ions

2016 ◽  
Vol 27 (3) ◽  
pp. 57-62 ◽  
Author(s):  
Tetsuto KAJIYAMA ◽  
Shohei SAKAI ◽  
Jun INOUE ◽  
Toru YOSHINO ◽  
Satoshi OHMURO ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Rare Metal ◽  
Adsorption Properties ◽  
Banana Fibers

scholarly journals Extractive Separation of Trivalent Rare Earth Metal Ions with Phenylphosphoric Acid Type of Trident Molecule for Rare Metal Recovery

2018 ◽  
Vol 23 (1) ◽  
pp. 36-41 ◽  
Author(s):  
Keisuke OHTO ◽  
Hiromasa MURASHIMA ◽  
Shintaro MORISADA ◽  
Hidetaka KAWAKITA ◽  
Marco WENZEL ◽  
...  
Keyword(s):  
Rare Earth ◽  
Metal Ions ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Rare Metal ◽  
Metal Recovery ◽  
Acid Type ◽  
Extractive Separation ◽  
Trivalent Rare Earth

scholarly journals Preparation of a Modified PTFE Fibrous Photo-Fenton Catalyst and Its Optimization towards the Degradation of Organic Dye

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Zhizhong Ding ◽  
Yongchun Dong ◽  
Bing Li
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Metal Content ◽  
Dye Degradation ◽  
Fiber Surface ◽  
Transition Metal Ions ◽  
Rare Metal ◽  
Catalytic Performance ◽  
Factors Affecting ◽  
Grafting Degree

Polytetrafluoroethylene (PTFE) fiber was grafted with acrylic acid to impart the carboxyl groups onto the fiber surface, which were used to coordinate with both transition metal ions Fe(III) and Cu(II) and a rare metal ion Ce(III) to prepare the metal grafted PTFE fiber complexes as the novel heterogeneous Fenton catalysts for the degradation of the azo dye in water under visible irradiation. Some factors affecting the preparation process, such as nature and concentration of metal ions in the coordination solution, grafting degree of PTFE and reaction temperature were optimized with respect to the content and strength of metal fixation on the fiber and dye degradation efficiency. The results indicated that increasing metal ion concentrations in solution and grafting degree of PTFE fiber as well as higher coordination temperature led to a significant increase in metal content, especially Fe(III) and Cu(II) content of the complexes. Fe(III) ions fixed on the fiber showed the better catalytic performance than Cu(II) and Ce(III) ions fixed when three different complexes with similar metal content being employed, respectively. Moreover, Increasing Fe content or incorporation of Cu(II) ions could significantly improve the catalytic activity of the complexes.

Engineering of microorganisms towards recovery of rare metal ions

2010 ◽  
Vol 87 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Kouichi Kuroda ◽  
Mitsuyoshi Ueda
Keyword(s):  
Metal Ions ◽  
Rare Metal

Separation of Rare Metal Ions by a Column Packed with Microcapsules Containing an Extractant

2002 ◽  
Vol 41 (15) ◽  
pp. 3669-3675 ◽  
Author(s):  
Eiji Kamio ◽  
Kazuo Kondo
Keyword(s):  
Metal Ions ◽  
Rare Metal

scholarly journals Capturing of Positive and Negative Rare-metal Ions by Polarity-Composite Hydrogels

2011 ◽  
Vol 36 (3) ◽  
pp. 401-404 ◽  
Author(s):  
Kazuhiro Hara ◽  
Etsuyasu Hirata ◽  
Satoru Yoshioka ◽  
Tetsuaki Nishida
Keyword(s):  
Metal Ions ◽  
Rare Metal ◽  
Composite Hydrogels

Interaction of Carboxyl Groups with Rare Metal Ions on the Surface of Detonation Nanodiamonds

2019 ◽  
Vol 2019 (39-40) ◽  
pp. 4345-4349 ◽  
Author(s):  
Elena B. Yudina ◽  
Alexander E. Aleksenskii ◽  
Irina G. Fomina ◽  
Alexander V. Shvidchenko ◽  
Dmitry P. Danilovich ◽  
...  
Keyword(s):  
Metal Ions ◽  
Rare Metal ◽  
Detonation Nanodiamonds ◽  
Carboxyl Groups
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