A new clean approach for production of cobalt dihydroxide from aqueous Co(II) using oxygen-reducing biocathode microbial fuel cells

Liping Huang, Yaxuan Liu, Lihua Yu, Xie Quan, Guohua Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

36 Citations (Scopus)

Abstract

Cobalt recovery from aqueous Co(II) is one critical step for recovery of cobalt and recycle of spent lithium ion batteries, but suffers from consumption of large amount of energy and chemicals. Effective and environmental friendly processes are thus needed to improve the existing process limitations. This study proposes a new approach for cobalt dihydroxide production using oxygen-reducing biocathode microbial fuel cells (MFCs) with respect to aqueous Co(II) utilization and clean production. OH-generated from oxygen-reducing biocathodes in situ reacted with Co(II) to form precipitated Co(OH)2, achieving cobalt dihydroxide production with simultaneous electricity generation. The highest cobalt recovery rate of 0.079 ± 0.001 mmol/(L·h) and cobalt dihydroxide yield of 0.24 ± 0.00 mol/mol COD with simultaneous electricity production of 1.5 W/m3were obtained under the optimal condition of a dissolved oxygen of 0.031 mM, an initial pH of 5.6, and an initial Co(II) concentration of 0.508 mM. These results demonstrate that cobalt dihydroxide production from aqueous Co(II) using oxygen-reducing biocathode MFCs may be a promising process for recovery of cobalt and recycle of spent lithium ion batteries as well as power generation.
Original languageEnglish
Pages (from-to)441-446
Number of pages6
JournalJournal of Cleaner Production
Volume86
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Keywords

  • Biocathode
  • Cobalt dihydroxide yield
  • Cobalt recovery rate
  • Microbial fuel cell
  • Oxygen-reducing

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Strategy and Management
  • Industrial and Manufacturing Engineering

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