Study on alkali mechanical activation for recovering rare earth from waste fluorescent lamps | |
He, Ling1,2; Ji, Wen1; Yin, Yanwei1; Sun, Weimin1,2 | |
刊名 | JOURNAL OF RARE EARTHS |
2018-01 | |
卷号 | 36期号:1页码:108-112 |
关键词 | Rare earth Spinel structure Recovery rate Alkali mechanical activation Waste phosphors Rare earths |
ISSN号 | 1002-0721 |
DOI | 10.1016/j.jre.2017.05.016 |
英文摘要 | Recycling of rare earth from waste fluorescent lamps is becoming increasingly important in future sustainable development. However, cerium and terbium are usually difficult to recover due to the stable spinel structure. In the research, alkali mechanical activation was innovatively used to pretreat the waste phosphors for recovering rare earths. The effect of alkali mechanical activation on the structural changes of waste phosphors was explored using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Meanwhile, the effects of different parameters including milling speed, activation time, and amount of alkali on the leaching rates of rare earth were investigated. The rare earth elements recovery rates are observed to increase rapidly, particularly with increases in rotational speed and activation time. Under optimal conditions, the maximum leaching rates of Ce and Tb reach 85.0% and 89.8%, respectively. And the total recovery rates of rare earth reach 95.2%. All the results indicate that alkali mechanical activation can effectively destroy the spinel structure and produce substantial physicochemical changes. These changes lead to the easy dissolution of rare earths in acid solution, and greatly improve the leaching of cerium and terbium. (C) 2018 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths. |
资助项目 | Lanzhou University of Technology[SKLAB02014010] ; National Natural Science Foundation of China[516744130] ; Natural Science Fund of Gansu Province of China[1508RJZA049] |
WOS研究方向 | Chemistry |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000419223200010 |
状态 | 已发表 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.223/handle/2XXMBERH/32863] |
专题 | 材料科学与工程学院 省部共建有色金属先进加工与再利用国家重点实验室 |
通讯作者 | He, Ling |
作者单位 | 1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | He, Ling,Ji, Wen,Yin, Yanwei,et al. Study on alkali mechanical activation for recovering rare earth from waste fluorescent lamps[J]. JOURNAL OF RARE EARTHS,2018,36(1):108-112. |
APA | He, Ling,Ji, Wen,Yin, Yanwei,&Sun, Weimin.(2018).Study on alkali mechanical activation for recovering rare earth from waste fluorescent lamps.JOURNAL OF RARE EARTHS,36(1),108-112. |
MLA | He, Ling,et al."Study on alkali mechanical activation for recovering rare earth from waste fluorescent lamps".JOURNAL OF RARE EARTHS 36.1(2018):108-112. |
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