Environmental Aspects of the Electrochemical Recovery of Tellurium by Electrochemical Deposition-Redox Replacement (EDRR)

P. Halli, M. Rinne, B. P. Wilson, K. Yliniemi, M. Lundström*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

1 Citation (Scopus)

Abstract

The current study investigates the energy consumption and the corresponding global warming potential (GWP) of tellurium recovery from multimetal solution by the use of a tailored electrochemical recovery approach based on electrodeposition-redox replacement (EDRR). A three-electrode cell was used to recover Te from synthetically prepared pregnant leach solution similar to the PLS of leached Doré slag (30% aqua regia, [Cu] = 3.9 g/L, [Bi] = 4.6 g/L, [Fe] = 1.4 g/L, and [Te] = 100–500 ppm). The enrichment of Te on the electrode (with 100 EDRR cycles) had a calculated global warming potential of 3.7 CO2 -eqv from a solution with 500 ppm Te based on a Finnish energy mix. In comparison, a decrease of Te concentration to 100 ppm increased the corresponding environmental impact to 16.9 CO2 -eqv. Overall, GWP was shown to be highly dependent on the geographical area, i.e. the dominating energy production methods.

Original languageEnglish
Title of host publicationRare Metal Technology 2021
Pages57-63
Number of pages7
ISBN (Electronic)978-3-030-65489-4
DOIs
Publication statusPublished - 2021
MoE publication typeA3 Part of a book or another research book

Publication series

NameMinerals, Metals and Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Keywords

  • Energy efficiency
  • Life cycle assessment (LCA)
  • Metals circular economy
  • Tellurium

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