Leaching of Rare Earth Metals from Phosphor Coating of Waste Fluorescent Lamps

Anand, Amit; Singh, Randhir; Sheik, Abdul Rauf; Ghosh, Malay Kumar; Sanjay, Kali

doi:10.1007/s12666-018-1511-9

Cited by 15 publications

(6 citation statements)

References 17 publications

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“… 65 (5) Phosphor powder from Baogangxinli RE Co., Ltd, Ganzhou, China. 74 (6) Phosphor powder from a company located in Sweden. 66 (7) Phosphor powder from a waste fluorescent lamp, supplied by Zhejiang Chenhui Lighting Co., Ltd., collected from the market.…”

Section: Fluorescent Lamp Powder: Is It An Obsolete Treasure?mentioning

confidence: 99%

E-waste mining and the transition toward a bio-based economy: The case of lamp phosphor powder

Giese

2022

MRS Energy & Sustainability

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Replacement of conventional hydrometallurgical and pyrometallurgical process used in E-waste recycling to recover metals can be possible. The metallurgical industry has been considered biohydrometallurgical-based technologies for E-waste recycling. Biorecovery of critical metals from phosphor powder from spent lamps is an example of transition to a bio-based circular economy. E-waste contains economically significant levels of precious, critical metals and rare-earth elements (REE), apart from base metals and other toxic compounds. Recycling and recovery of critical elements from E-waste using a cost-effective technology are now among the top priorities in metallurgy due to the rapid depletion of their natural resources. This paper focuses on the perceptions of recovery of REE from phosphor powder from spent fluorescent lamps regarding a possible transition toward a bio-based economy. An overview of the worldwide E-waste and REE is also demonstrated to reinforce the arguments for the importance of E-waste as a secondary source of some critical metals. Based on the use of bioprocesses, we argue that the replacement of conventional steps used in E-waste recycling by bio-based technological processes can be possible. The bio-recycling of E-waste follows a typical sequence of industrial processes intensely used in classic pyro- and hydrometallurgy with the addition of bio-hydrometallurgical processes such as bioleaching and biosorption. We use the case study of REE biosorption as a new technology based on biological principles to exemplify the potential of urban biomining. The perspective of transition between conventional processes for the recovery of valuable metals for biohydrometallurgy defines which issues related to urban mining can influence the mineral bioeconomy. This assessment is necessary to outline future directions for sustainable recycling development to achieve United Nations Sustainable Development Goals. Graphical Abstract

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Section: Fluorescent Lamp Powder: Is It An Obsolete Treasure?mentioning

confidence: 99%

E-waste mining and the transition toward a bio-based economy: The case of lamp phosphor powder

Giese

2022

MRS Energy & Sustainability

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“…Based on literature analysis in this field, the common operating condition ranges were used in this study (De Michelis et al 2011;Anand et al 2019). Table 3 shows the different ranges of operating conditions and actual values, parameter X 1 from 1 to 5 M, X 2 between 20 and 90°C, X 3 from 20 to 180 mL/g, and X 4 from 10 to 240 min.…”

Section: Leaching Tests With Sulfuric Acidmentioning

confidence: 99%

“…Due to presence of terbium oxide in the studied PP, H 2 SO 4 is chosen for the first leaching step in order to have a preliminary mutual separation of REEs. Such as mentioned in the "Introduction" section, this leachant agent provides greater leaching efficiency of rare earth oxides, while those present as phosphate and aluminate have dissolved only with HCl or HNO 3 under moderate conditions (De Michelis et al 2011;Innocenzi et al 2013;Yang et al 2013;Anand et al 2019).…”

Section: Leachant Agent Selectionmentioning

confidence: 99%

“…In addition, the negligible dissolution of undesirable metallic impurities, essentially calcium, has a great advantage to subsequent process. Let us also note that the use of the same leachant agent (sulfuric acid) by certain researchers in the first leaching step can only dissolve yttrium and europium, whereas terbium, lanthanum, and cerium remain in the leach residue (Yang et al 2013;Anand et al 2019).…”

Section: Experimental Test Of Optimal Pointmentioning

confidence: 99%

“…The method to recover pure phosphors from spent linear FLs such as end cut-push technique before any hydrometallurgical process would appear to be economically effective compared with the abovementioned methods (Anand et al 2019). Therefore, improving leaching efficiency of Tb, La, and Ce (in green phosphors) with minimal consumption of energy and different chemical reagent agents is considered to be the key issue improving REE recovery from waste FLs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Leaching process for terbium recovery from linear tube fluorescent lamps: optimization by response surface methodology

Alaoui

Hassani

2020

Environ Sci Pollut Res

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Until now, rare earth elements (REEs) recycled from the green phosphor of waste fluorescent lamps (FLs), essentially terbium, remain a major challenge. The sulfuric acid effect on leaching efficiency of REEs from phosphor powder (PP) is investigated in this paper. According to a composite central design, experimental leaching study is performed under various parameters (acid concentration, leaching temperature, and time as well as liquid-to-solid ratio (L/S)). A statistical model of experiments and an analysis of variance are studied in order to predict leaching process. The results showed that by decreasing concentration and L/S ratio while increasing leaching time at optimal temperature value permits profitable terbium extraction. Afterwards, the developed statistical model is explored for an optimized response surface methodology. The obtained results were tested experimentally and showed best terbium extraction with 75%. Moreover, 0.01% for the major contaminant, that is calcium, is reached. This low calcium yield may have a further advantage during REE recovery in the downstream. Therefore, resulting solution under optimal conditions is treated with oxalic acid followed by a calcination of the solid precipitate. Finally, 43.57% and 49.38% are produced for terbium and yttrium oxides, respectively.

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Leaching of Rare Earth Elements from the Residue Generated by the Lixiviation of Waste Phosphor with Sulphuric Acid

Anand

Singh

Samantray

et al. 2020

Trans Indian Inst Met

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Leaching of Rare Earth Metals from Phosphor Coating of Waste Fluorescent Lamps

Cited by 15 publications

References 17 publications

E-waste mining and the transition toward a bio-based economy: The case of lamp phosphor powder

E-waste mining and the transition toward a bio-based economy: The case of lamp phosphor powder

Leaching process for terbium recovery from linear tube fluorescent lamps: optimization by response surface methodology

Leaching of Rare Earth Elements from the Residue Generated by the Lixiviation of Waste Phosphor with Sulphuric Acid

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