Multiscale recycling rare earth elements from real waste trichromatic phosphors containing glass

Liu, Hu; Li, Shiyin; Wang, Bo; Wang, Kun; Wu, Ruize; Ekberg, Christian; Volinsky, Alex A.

doi:10.1016/j.jclepro.2019.117998

Cited by 40 publications

(13 citation statements)

References 31 publications

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“…Many fluorescent lamps and those made by some manufacturers outside of China contain halophosphates (Sr, Ca) 10 (PO 4 ) 6 (Cl, F) 2 :Sb 3+ , Mn 2+ or its mixture with Y 2 O 3 :Eu 3+ . They are recycled by removing the glass, phosphor decomposition during alkaline fusion at 800 °C, and washing excess alkali and sodium aluminate followed by REEs leaching [ 10 ]. For the REEs recovery, HNO 3 , HCl, or H 2 SO 4 with the Y, Eu extraction over 90% at the 1−4 M acid concentration, a 1−24 h leaching time, and a temperature of 50−110 °C are mainly used.…”

Section: Introductionmentioning

confidence: 99%

Green Extractants in Assisting Recovery of REEs: A Case Study

et al. 2023

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The recycling of REEs from the end of life (EoL) products, such as nickel metal hydride batteries (NiMH), offers great opportunities for their supply in Europe. In the presented paper, the application of ‘green’ extractants such as citric (CA), metatartaric (TA), and ethylenediaminedisuccinic acid (EDDS) (also with H2O2 addition) for the recovery of REEs was studied. The studies were conducted considering the effects of the phase contact time, the initial concentration of CA, TA, and EDDS, as well as H2O2, pH, and temperature. It was found that the addition of TA to the CA solution meant that higher rates of metal ion binding and, thus, leaching was observed. The optimal conditions were obtained in the system: CA-TA and H2O2 for the concentration 0.6M-0.3 M-2%.

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Section: Introductionmentioning

confidence: 99%

Green Extractants in Assisting Recovery of REEs: A Case Study

et al. 2023

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“…Roasting [ 10 ] and leaching [ 11 ] constitute the processes most frequently applied to these solid wastes via the pyro- and hydro-branches of extractive metallurgy, respectively [ 12 ]. The leaching steps may include acidic [ 13 ], alkaline [ 14 ], or bioleaching solutions [ 6 , 15 ]. Simple precipitation techniques are poorly selective for the treatment of leachates [ 16 , 17 ], and it is generally necessary to couple selective precipitation steps [ 13 , 18 , 19 ] with complementary separation processes, such as solvent extraction [ 20 , 21 , 22 ] or sorption processes [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Cerium Sorption onto Urea-Functionalized Magnetite Chitosan Microparticles by Sorbent Sulfonation—Application to Ore Leachate

Hamza

Guibal²,

Abdel‐Rahman

et al. 2022

Molecules

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The recovery of strategic metals such as rare earth elements (REEs) requires the development of new sorbents with high sorption capacities and selectivity. The bi-functionality of sorbents showed a remarkable capacity for the enhancement of binding properties. This work compares the sorption properties of magnetic chitosan (MC, prepared by dispersion of hydrothermally precipitated magnetite microparticles (synthesized through Fe(II)/Fe(III) precursors) into chitosan solution and crosslinking with glutaraldehyde) with those of the urea derivative (MC-UR) and its sulfonated derivative (MC-UR/S) for cerium (as an example of REEs). The sorbents were characterized by FTIR, TGA, elemental analysis, SEM-EDX, TEM, VSM, and titration. In a second step, the effect of pH (optimum at pH 5), the uptake kinetics (fitted by the pseudo-first-order rate equation), the sorption isotherms (modeled by the Langmuir equation) are investigated. The successive modifications of magnetic chitosan increases the maximum sorption capacity from 0.28 to 0.845 and 1.25 mmol Ce g−1 (MC, MC-UR, and MC-UR/S, respectively). The bi-functionalization strongly increases the selectivity of the sorbent for Ce(III) through multi-component equimolar solutions (especially at pH 4). The functionalization notably increases the stability at recycling (for at least 5 cycles), using 0.2 M HCl for the complete desorption of cerium from the loaded sorbent. The bi-functionalized sorbent was successfully tested for the recovery of cerium from pre-treated acidic leachates, recovered from low-grade cerium-bearing Egyptian ore.

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“…REEs were successfully obtained by direct leaching or alkali fusion-leaching methods from these combustion products (Peiravi et al, 2017;Tang et al, 2019;Tuan et al, 2019). The recovery of REEs from waste materials, such as scraps, cathode ray tubes, magnets, and glasses are of increasing importance (Yin et al, 2018;Jowitt et al, 2018;Liu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Extraction of Lanthanum and Cerium From a Bastnasite Ore by Direct Acidic Leaching

Kurşunoğlu¹,

Top²,

Hussaini³

et al. 2020

Bilimsel Madencilik Dergisi

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The extraction of lanthanum (La) and cerium (Ce) from a bastnasite ore by direct acidic leaching was investigated. The effects of acid concentration and leaching temperature on the extraction of La and Ce from the ore were tested. Using nitric (NHO 3 ), more than 85% of the La and Ce were simultaneously extracted into leach solution whereas the La and Ce dissolutions were determined as less than 85% by using sulfuric acid (H 2 SO 4 ). The La dissolution exceeded 90% by using hydrochloric acid (HCl); however, the Ce dissolution remained below 85% under the following conditions: solid-to-liquid ratio of 20% (w/v), the acid concentration of 20%, leaching temperature of 25 °C and leaching time of 1 h. The result revealed that HNO 3 could be used as a solvent for the maximum simultaneous extraction of the La and Ce from the bastnasite ore. The leaching temperature had no crucial effect on the dissolution of La and Ce when HNO 3 or HCl solutions were preferred as a solvating agent. However, the leaching temperature had a slight positive effect on the dissolutions of La and Ce when H 2 SO 4 was used as a solvent. ÖZDirekt asit liçi ile bir bastnazit cevherinden lantanyum (La) ve seryum (Ce) ekstraksiyonu araştırılmıştır. Bastnazit cevherinden La ve Ce ekstraksiyonuna asit konsantrasyonu ve liç sıcaklığının etkileri test edilmiştir. Nitrik asit (NHO 3 ) kullanarak La ve Ce'un %85'ten fazlası liç çözeltisine alınmıştır ancak çözünme değerleri sülfürik asit (H 2 SO 4 ) kullanıldığında %85'ten az olarak belirlenmiştir. La çözünümü hidroklorik asit (HCl) kullanımıyla %90'ı geçmiştir fakat Ce çözünümü %20 (g/L) katı-sıvı oranı, %20 asit konsantrasyonu, 25 °C liç sıcaklığı ve 1 saat liç süresi şartları altında %85'in altında kalmıştır. Sonuçlar bastnazit cevherinden eş zamanlı olarak maksimum La ve Ce çözünümüne ulaşılabilmek için çözücü olarak HNO3 kullanılabileceğini ortaya koymuştur. Çözücü olarak HNO 3 ve HCl tercih edildiğinde liç sıcaklığının La ve Ce çözünümüne önemli bir etki yapmadığı belirlenmiştir. Fakat çözücü olarak H 2 SO 4 kullanılmasıyla liç sıcaklığının La ve Ce çözünmeleri üzerine hafif bir pozitif etkisi saptanmıştır.

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Multiscale recycling rare earth elements from real waste trichromatic phosphors containing glass

Cited by 40 publications

References 31 publications

Green Extractants in Assisting Recovery of REEs: A Case Study

Green Extractants in Assisting Recovery of REEs: A Case Study

Enhancement of Cerium Sorption onto Urea-Functionalized Magnetite Chitosan Microparticles by Sorbent Sulfonation—Application to Ore Leachate

Extraction of Lanthanum and Cerium From a Bastnasite Ore by Direct Acidic Leaching

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