Selective and fast recovery of neodymium from seawater by magnetic iron oxide Fe3O4

Tu, Yaqing; Lo, Sheng Chung; You, Chen Feng

doi:10.1016/j.cej.2014.10.025

Cited by 40 publications

(12 citation statements)

References 36 publications

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“…Sips equation is a common adaptation of the Langmuir–Freundlich models; values for 1/ns close to zero are generally associated with heterogeneous sorbents, while values closer to 1.0 correspond to sorbents with relatively homogeneous binding sites [ 36 ]. Sorption capacity of ChiFer(III) is almost four times higher than raw chitosan particles, it is consistent with the values obtained in the pH study: the introduction of iron into the composite increases the removal of Nd (the maximum sorption capacities obtained are 3.5 mg·g −1 and 13.8 mg·g −1 for chitosan and ChiFer(III) respectively); taking into account that iron content in the composite is 0.33 g per gram of dried ChiFer(III), the contribution of iron is calculated as 30.9 mg Nd/g Fe, which is very close to the value reported by Tu et al [ 4 ] using magnetic iron oxide (Fe 3 O 4 ) particles as sorbent ( Table 2 ).…”

Section: Resultssupporting

confidence: 86%

“…The most abundant REEs in the earth crust are yttrium (28–70 mg·kg −1 ) and cerium (20–70 mg·kg −1 ) and the less abundant is thulium (0.2–1.0 mg·kg −1 ). Special attention must be paid to neodymium (Nd), which is a key element in the high-tech industries and its applications include the manufacturing of the high strength permanent magnets (Nd-Fe-B), the fabrication of electrical motors for hybrid vehicles, and wind turbine generators [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

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Neodymium Recovery by Chitosan/Iron(III) Hydroxide [ChiFer(III)] Sorbent Material: Batch and Column Systems

et al. 2018

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A low cost composite material was synthesized for neodymium recovery from dilute aqueous solutions. The in-situ production of the composite containing chitosan and iron(III) hydroxide (ChiFer(III)) was improved and the results were compared with raw chitosan particles. The sorbent was characterized using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy-energy dispersive X-ray analyses (SEM-EDX). The equilibrium studies were performed using firstly a batch system, and secondly a continuous system. The sorption isotherms were fitted with the Langmuir, Freundlich, and Sips models; experimental data was better described with the Langmuir equation and the maximum sorption capacity was 13.8 mg·g−1 at pH 4. The introduction of iron into the biopolymer matrix increases by four times the sorption uptake of the chitosan; the individual sorption capacity of iron (into the composite) was calculated as 30.9 mg Nd/g Fe. The experimental results of the columns were fitted adequately using the Thomas model. As an approach to Nd-Fe-B permanent magnets effluents, a synthetic dilute effluent was simulated at pH 4, in order to evaluate the selectivity of the sorbent material; the overshooting of boron in the column system confirmed the higher selectivity toward neodymium ions. The elution step was carried out using MilliQ-water with the pH set to 3.5 (dilute HCl solution).

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Neodymium Recovery by Chitosan/Iron(III) Hydroxide [ChiFer(III)] Sorbent Material: Batch and Column Systems

et al. 2018

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“…Particular attention should be paid to rare earth elements (REEs). The literature for RREs recovery through biosorption process is still scarce (in comparison with heavy metals); e.g., terbium is a key element in the high-tech industries; its applications include the manufacturing of fluorescent lamps and fuel cells, the production of high strength permanent magnets, the fabrication of electrical motors in hy Demey et al Chemical Engineering Journal xxx (2018) xxx-xxx brid vehicles and wind turbine generators [17]. The concentration of Tb(III) in the earth's crust is low (0.7-2.5 mg Kg…”

Section: Introductionmentioning

confidence: 99%

Evaluation of torrefied poplar-biomass as a low-cost sorbent for lead and terbium removal from aqueous solutions and energy co-generation

Demey

Melkior

Chatroux

et al. 2019

Chemical Engineering Journal

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Two low-cost renewable poplar-based materials were manufactured in this work for energy production and as sorbents for lead and terbium removal from aqueous effluents. Torrefaction was used as a pretreatment process for conditioning the raw biomass. Two different operating conditions were used in the multiple-hearth furnace of the torrefaction pilot-plant: i) 250°C; ii) 280°C, with residence times of 75 min and 60 min, respectively. The raw and torrefied biomasses have been characterized using SEM-EDX, FTIR, TGA, XRD and elemental analyses (C, H, N, S, O); an increase of the torrefaction severity, results in an increase of the carbon/oxygen ratio and in a greater mass loss (21% at 250°C, and 53% at 280°C). The torrefaction had a positive impact on the sorption of metals, it allowed the increase of lignin content of the manufactured materials, and it allowed the storage of the sorbents for longer time with reduced moisture content. The equilibrium studies were performed in batch system and the experimental data were described with the Sips equation. The maximum sorption capacity was found as 30 mg g −1 for lead and 9.4 mg g −1 for terbium (at pH 4). The kinetic profiles were fitted using the pseudo-second order rate equation. The regeneration of the sorbent was demonstrated by three sorption-desorption cycles using dilute HNO 3 solution (0.1 M) as eluent for metal recovery.

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“…As we all know, both iron concentrate (Fe 3 O 4 ) and sponge iron (Fe) have some magnetic properties; therefore, magnetic separation is an effective way to recover iron where Fe 3 O 4 and Fe are used for iron smelting and steel making [8][9][10][11], respectively. Currently, the recovery of Fe 3 O 4 and Fe was studied by many researchers using magnetic separation from various metal dressing tailings or other solid wastes rich in iron [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Recovery of γ-Fe₂O₃ from copper ore tailings by magnetization roasting and magnetic separation

2021

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To comprehensively reuse copper ore tailings, the recovery of γ-Fe2O3 from magnetic roasted slag after sulfur release from copper ore tailings followed by magnetic separation is performed. In this work, after analysis of chemical composition and mineralogical phase composition, the effects of parameters in both magnetization roasting and magnetic separation process with respect to roasting temperature, residence time, airflow, particle size distribution, magnetic field intensity, and the ratio of sodium dodecyl sulfonate to roasted slag were investigated. Under optimum parameters, a great number of γ-Fe2O3 is recycled with a grade of 66.86% and a yield rate of 67.21%. Meanwhile, the microstructure, phase transformation and magnetic property of copper ore tailings, roasted slag, and magnetic concentrate are carried out.

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Selective and fast recovery of neodymium from seawater by magnetic iron oxide Fe3O4

Cited by 40 publications

References 36 publications

Neodymium Recovery by Chitosan/Iron(III) Hydroxide [ChiFer(III)] Sorbent Material: Batch and Column Systems

Neodymium Recovery by Chitosan/Iron(III) Hydroxide [ChiFer(III)] Sorbent Material: Batch and Column Systems

Evaluation of torrefied poplar-biomass as a low-cost sorbent for lead and terbium removal from aqueous solutions and energy co-generation

Recovery of γ-Fe₂O₃ from copper ore tailings by magnetization roasting and magnetic separation

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Selective and fast recovery of neodymium from seawater by magnetic iron oxide Fe3O4

Cited by 40 publications

References 36 publications

Neodymium Recovery by Chitosan/Iron(III) Hydroxide [ChiFer(III)] Sorbent Material: Batch and Column Systems

Neodymium Recovery by Chitosan/Iron(III) Hydroxide [ChiFer(III)] Sorbent Material: Batch and Column Systems

Evaluation of torrefied poplar-biomass as a low-cost sorbent for lead and terbium removal from aqueous solutions and energy co-generation

Recovery of γ-Fe2O3 from copper ore tailings by magnetization roasting and magnetic separation

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Recovery of γ-Fe₂O₃ from copper ore tailings by magnetization roasting and magnetic separation