Advertisement

Journal of Sustainable Metallurgy

, Volume 4, Issue 4, pp 437–442 | Cite as

Leaching Kinetics of Yttrium and Europium Oxides from Waste Phosphor Powder

  • P. M. Eduafo
  • B. Mishra
Research Article
  • 29 Downloads

Abstract

Phosphor powder sample was characterized, and the leaching kinetics of yttrium, and europium in hydrochloric acid were investigated. Under optimized leaching conditions, 98% Y and 97% Eu were extracted, and a reaction curve was generated using the percentage of extraction as a function of time and temperature. Based on R2 values, shrinking spherical particle and shrinking core model were not applicable. SEM analysis also confirmed shrinking core behavior was not applicable due to the lack of core–shells in the leach residue. The kinetic data were best fitted by a logarithmic rate expression of the empirical model. Activation energy was calculated to be 77.49 kJ/mol for Y and 72.75 kJ/mol for Eu in the temperature range of 298–343 K.

Keywords

Kinetics Leaching Phosphor powder Rare earth elements Waste fluorescent lamp 

References

  1. 1.
    Tunsu C, Petranikova M, Ekberg C, Retegan T (2016) A hydrometallurgical process for the recovery of rare earth elements from fluorescent lamp waste fractions. Sep Purif Technol 161:172–186CrossRefGoogle Scholar
  2. 2.
    Takahashi T, Tomita K, Sakuta Y, Takano A, Nagano N (1996) Report of Hokkaido Industrial Research Institute, no. 295. Hokkaido Industrial Research Institute, HokkaidoGoogle Scholar
  3. 3.
    Takahashi T, Takano A, Saito T, Nagano N (1999) Reports of Hokkaido Industrial Research Institute, no. 298. Hokkaido Industrial Research Institute, HokkaidoGoogle Scholar
  4. 4.
    Takahashi T, Takano A, Saitoh T, Nagano N (2003) Reports of Hokkaido Industrial Research Institute, no. 302. Hokkaido Industrial Research Institute, HokkaidoGoogle Scholar
  5. 5.
    Rabah MA (2008) Recyclables recovery of europium and yttrium metals and some salts from spent fluorescent lamps. Waste Manag 28(2):318–325CrossRefGoogle Scholar
  6. 6.
    Wu Y, Yin X, Zhang Q, Wang W, Mu X (2014) The recycling of rare earths from waste tricolor phosphors in fluorescent lamps: a review of processes and technologies. Resour Conserv Recycl 88:21–31CrossRefGoogle Scholar
  7. 7.
    Yang F, Kubota F, Baba Y, Kamiya N, Goto M (2013) J Hazard Mater 254–255:79–88CrossRefGoogle Scholar
  8. 8.
    De Michelis I, Ferella F, Varelli EF, Vegliò F (2011) Selective extraction and recovery of rare earth metals from phosphor powders in waste fluorescent lamps using an ionic liquid system. Waste Manag 31(12):2559–2568CrossRefGoogle Scholar
  9. 9.
    Eduafo PM (2016) ProQuest number: 10019488, Colorado School of Mines, ProQuest Dissertations PublishingGoogle Scholar
  10. 10.
    Rabah MA (2016) Waste. In: Strauss M, Eduafo P and Mishra B (eds) 4843-148-PROVGoogle Scholar
  11. 11.
    Tunsu C, Lapp JB, Ekberg C, Retegan T (2016) Selective separation of yttrium and europium using Cyanex 572 for applications in fluorescent lamp waste processing. Hydrometallurgy 166:98–106CrossRefGoogle Scholar
  12. 12.
    Tunsu C, Ekberg C, Foreman M, Retegan T (2014) Solvent Extr Ion Exch 32(6):650–668CrossRefGoogle Scholar
  13. 13.
    Kim E, Kim M, Lee J, Jeong J, Pandey BD (2011) Studies on the solvent extraction of rare earth metals from fluorescent lamp waste using Cyanex 923. Hydrometallurgy 107:124–132CrossRefGoogle Scholar
  14. 14.
    Verma HR, Sahu SK, Meshram P, Pandey BD, Mankhand TR (2013) Kinetics of hydrometallurgical extraction of rare earth metals from waste phosphor. Int J Res Eng Technol (IJRET) 2(5):251–255Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.George S. Ansell Department of Metallurgical and Materials EngineeringColorado School of MinesGoldenUSA
  2. 2.Mechanical EngineeringWorcester Polytechnic InstituteWorcesterUSA

Personalised recommendations