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Author:

Yin, Xiaofei (Yin, Xiaofei.) | Yu, Jiamei (Yu, Jiamei.) | Wu, Yufeng (Wu, Yufeng.) (Scholars:吴玉锋) | Tian, Xiangmiao (Tian, Xiangmiao.) | Wang, Wei (Wang, Wei.) (Scholars:王伟) | Zhang, Yi-Nan (Zhang, Yi-Nan.) | Zuo, Tieyong (Zuo, Tieyong.) (Scholars:左铁镛)

Indexed by:

EI Scopus SCIE

Abstract:

In this paper, we propose a novel and sustainable process for recycling rare earths (REs) and zinc (Zn) simultaneously from waste cathode ray tube (CRT) phosphors. First, 95% of the impurities such as glass cullets and aluminum foils are removed by simple screening. Then, a self propagating, high-temperature synthesis reaction following a water-leaching process is performed to recycle Zn selectively. The REs are recycled by a combined process of oxidative leaching and ionic-liquid-based extraction. They are then regenerated to form a new Y2O3:Eu3+ phosphor. By following this green recycling design, the recovery efficiencies of REs and Zn reach 99.5% and 99%, respectively. The negative bivalent sulfur in ZnS and Y2O3:Eu3+ is converted completely to SO42-, which efficiently avoids the secondary pollution. It should also be pointed out that the main recovery processes are all carried out at room temperature, and the "three wastes" emissions are minimized throughout the process. This work is expected to open new avenues for highly efficient, energy-saving, and pollution reducing recovery processes for waste CRT phosphors.

Keyword:

Sustainable design Rare earths Waste CRT phosphor Zn SHS Recycling

Author Community:

  • [ 1 ] [Yin, Xiaofei]Beijing Univ Technol, Inst Circular Econ, 100 Pingleyuan St, Beijing 100124, Peoples R China
  • [ 2 ] [Yu, Jiamei]Beijing Univ Technol, Inst Circular Econ, 100 Pingleyuan St, Beijing 100124, Peoples R China
  • [ 3 ] [Wu, Yufeng]Beijing Univ Technol, Inst Circular Econ, 100 Pingleyuan St, Beijing 100124, Peoples R China
  • [ 4 ] [Wang, Wei]Beijing Univ Technol, Inst Circular Econ, 100 Pingleyuan St, Beijing 100124, Peoples R China
  • [ 5 ] [Zuo, Tieyong]Beijing Univ Technol, Inst Circular Econ, 100 Pingleyuan St, Beijing 100124, Peoples R China
  • [ 6 ] [Yin, Xiaofei]Beijing Univ Technol, Inst Beijing Tianjin Hebei Green Dev, 100 Pingleyuan St, Beijing 100124, Peoples R China
  • [ 7 ] [Yu, Jiamei]Beijing Univ Technol, Inst Beijing Tianjin Hebei Green Dev, 100 Pingleyuan St, Beijing 100124, Peoples R China
  • [ 8 ] [Wu, Yufeng]Beijing Univ Technol, Inst Beijing Tianjin Hebei Green Dev, 100 Pingleyuan St, Beijing 100124, Peoples R China
  • [ 9 ] [Wang, Wei]Beijing Univ Technol, Inst Beijing Tianjin Hebei Green Dev, 100 Pingleyuan St, Beijing 100124, Peoples R China
  • [ 10 ] [Zuo, Tieyong]Beijing Univ Technol, Inst Beijing Tianjin Hebei Green Dev, 100 Pingleyuan St, Beijing 100124, Peoples R China
  • [ 11 ] [Tian, Xiangmiao]Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China
  • [ 12 ] [Zhang, Yi-Nan]Univ Toronto, Inst Biomat & Biomed Engn, Toronto, ON M5S 3G9, Canada

Reprint Author's Address:

  • 吴玉锋

    [Wu, Yufeng]Beijing Univ Technol, Inst Circular Econ, 100 Pingleyuan St, Beijing 100124, Peoples R China;;[Wu, Yufeng]Beijing Univ Technol, Inst Beijing Tianjin Hebei Green Dev, 100 Pingleyuan St, Beijing 100124, Peoples R China

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Source :

ACS SUSTAINABLE CHEMISTRY & ENGINEERING

ISSN: 2168-0485

Year: 2018

Issue: 3

Volume: 6

Page: 4321-4329

8 . 4 0 0

JCR@2022

ESI Discipline: CHEMISTRY;

ESI HC Threshold:192

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count: 5

SCOPUS Cited Count: 6

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 5

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