Leaching kinetics of neodymium in sulfuric acid of rare earth elements (REE) slag concentrated by pyrometallurgy from magnetite ore

Kim, Chul Joo; Yoon, Ho Sung; Chung, Kyung Woo; Lee, Jin Young; Kim, Sung Don; Shin, Shun Myung; Kim, Hyung Seop; Cho, Jong Tae; Kim, Ji Hye; Lee, Eun Ji; Lee, Se Il; Yoo, Seung Joon

doi:10.1007/s11814-014-0078-3

Cited by 23 publications

(10 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nature of the stream to be processed, together with its chemical complexity and REEs content, determines the possible treatment methods. While pyrometallurgy is widely used in the processing of high-grade ores, this method is not always suitable for low-grade ores due to its high-energy requirement, the difficulty of treating small amounts of material and additional burdens on environmental treatment expense (Yoon et al, 2014b). Moreover, most often the products that are obtained pyrometallurgically require additional processing to produce pure rare earth metals (REMs) and REE compounds.…”

Section: Pyrometallurgical and Hydrometallurgical Treatmentmentioning

confidence: 99%

Reclaiming rare earth elements from end-of-life products: A review of the perspectives for urban mining using hydrometallurgical unit operations

et al. 2015

View full text Add to dashboard Cite

Section: Pyrometallurgical and Hydrometallurgical Treatmentmentioning

confidence: 99%

Reclaiming rare earth elements from end-of-life products: A review of the perspectives for urban mining using hydrometallurgical unit operations

et al. 2015

View full text Add to dashboard Cite

“…Metal recovery from solid waste or minerals may consist of pyrometallurgy or hydrometallurgy (chemical leaching or bioleaching) (El-Didamony et al 2012;Qu and Lian 2013;Yoon et al 2014;Zhang et al 2013). The extraction of metals from these leachates or waste streams can be processed by precipitation (Rabatho et al 2013), solvent extraction (Abreu and Morais 2014;Tunsu et al 2014;Vander Hoogerstraete and Binnemans 2014;Xie et al 2014), ion exchange and chelating resins (Abdel-Rahman Adel et al 2010; Barron et al 2008;Lokshin et al 2013;Xiong and Zheng 2010), extractant-impregnated resins (Lee et al 2010) and biosorption (Das and Das 2013;Hosomomi et al 2013;Oliveira et al 2012Oliveira et al , 2011Wu et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Diethylenetriamine-functionalized chitosan magnetic nano-based particles for the sorption of rare earth metal ions [Nd(III), Dy(III) and Yb(III)]

et al. 2015

View full text Add to dashboard Cite

The recovery of three rare earth (RE) metals ions [Yb(III), Dy(III) and Nd(III), belonging to heavy, mild and light REs, respectively] was investigated using hybrid chitosan-magnetic nano-based particles functionalized by diethylenetriamine (DETA). The effect of pH on sorption performance was analyzed: the optimum initial pH value was found close to 5 (equilibrium pH value close to 6.5). The nanometric size of sorbent particles (30-50 nm) minimized the contribution of resistance to intraparticle diffusion on the control of uptake kinetics, which is efficiently modeled using the pseudo-second order rate equation: under selected experimental conditions the contact time required for reaching equilibrium was less than 1 h. Sorption isotherms were efficiently modeled using the Langmuir equation: maximum sorption capacities reached about 50 mg metal g -1 , regardless of the RE. The temperature had a very limited effect on sorption capacity (in the range 300-320 K). The thermodynamic parameters were determined: the sorption was endothermic (positive values of DH°), spontaneous (negative values of DG°) and contributed to increasing the disorder of the system (positive values of DS°). The three REs have similar sorption properties on DETA-functionalized chitosan magnetic nano-based particles: the selective separation of these elements seems to be difficult. The sorbed metal ions can be removed from loaded sorbents using thiourea, and the sorbent can be recycled for at least five sorption/desorption cycles with a limited loss in sorption performance (by less than 6 %). The saturation magnetization was close to 20 emu g -1 ; this means that nano-based superparamagnetic particles can be readily recovered by an external magnetic field, making the processing of these materials easy.

show abstract

“…Between pH 2 and pH 4, the proportion of free uranyl species is progressively increasing (being the major species between pH 2.5 and 4.5): this may explain that jointly to the progressive decrease of competition effect of protons and predominance of free uranyl species, the sorption linearly increases. Above pH 4.5 the hydrolyzed polynuclear species predominate (mainly (UO 2 ) 3 (OH) 5 + and (UO 2 ) 4 (OH) 7 + )): they are all cationic and they may be bound to amine groups through complexation. While the pH increases the repulsion effect decreases and the sorption capacity increases.…”

Section: Sorption Properties Effect Of Phmentioning

confidence: 99%

“…The recovery of metal ions from spent materials, low‐grade ores, industrial wastes and wastewaters is via methods of pyrometallurgy and hydrometallurgy, which is less energy‐driven than pyrometallurgy. The leaching of solid wastes generates effluents (leachates) that contain variable amounts of base metals (iron, zinc, copper), but also traces (or at least much lower amounts) of strategic (such as uranium), critical (REEs, rare earth elements) or precious metals .…”

Section: Introductionmentioning

confidence: 99%

Magnetic glutamine‐grafted polymer for the sorption of U(VI), Nd(III) and Dy(III)

Hamza

Abdel‐Rahman

Guibal

2018

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND The nuclear power industry and other high‐tech industries require increasing quantities of uranium and rare‐earth elements (REEs). There is a need for materials that can competitively recover these metals from ore leachates (such as produced in the leaching of Egyptian ores). RESULTS A sorbent based on the chemical grafting of glutamine moieties on a magnetic polyacrylonitrile support was synthesized: polyacrylonitrile, crosslinked with 10% divinyl benzene in the presence of magnetite, was chemically modified by a series of grafting steps to produce a magnetic polyglutamine sorbent (MGLU). The sorbent was characterized by titration, elemental analysis, X‐ray diffraction (XRD), thermogravimetric analysis, Fourier‐transform infra‐red (FTIR) spectrometry and scanning electron microscopy (SEM). The sorption properties were tested as a function of pH; the sorption isotherms were modeled using the Langmuir equation (maximum sorption capacities: 2 mmol U g‐1 and up to 3.5 mmol g‐1 for Nd(III) and Dy(III)). The equilibrium is achieved within 1 h of contact. Metal desorption and sorbent recycling are highly efficient using acidic solutions; sorption/desorption performance remains stable for a minimum of 5 cycles. MGLU was tested for metal binding in multi‐metal solutions at different pH values. CONCLUSION This sorbent could be used for the recovery of REEs and uranium from simulated ore leachates. © 2017 Society of Chemical Industry

show abstract

Leaching kinetics of neodymium in sulfuric acid of rare earth elements (REE) slag concentrated by pyrometallurgy from magnetite ore

Cited by 23 publications

References 50 publications

Reclaiming rare earth elements from end-of-life products: A review of the perspectives for urban mining using hydrometallurgical unit operations

Reclaiming rare earth elements from end-of-life products: A review of the perspectives for urban mining using hydrometallurgical unit operations

Diethylenetriamine-functionalized chitosan magnetic nano-based particles for the sorption of rare earth metal ions [Nd(III), Dy(III) and Yb(III)]

Magnetic glutamine‐grafted polymer for the sorption of U(VI), Nd(III) and Dy(III)

Contact Info

Product

Resources

About