Enzymatic pre-treatment of carbonaceous matter in preg-robbing gold ores: Effect of ferrous ion additives

Kojo T. Konadu, Keiko Sasaki, Kwadwo Osseo-Asare, Takashi Kaneta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The bio-treatment of double refractory gold ores (DRGO) to reduce preg-robbing needs to account for the heterogeneity of the ore so as to acquire a much more complete picture of the system. To this end, the effects of ferrous ion additives on the degradation of powdered activated carbon (PAC) by cell-free spent medium (CFSM) was studied. Au(CN)2 - adsorption and Raman spectrometric results suggest that the ferrous salt could have possibly reacted with some biogenic hydrogen peroxide to aid in the degradation of PAC. The bio-treatment produced mixed solid residues containing some partially degraded aromatic compounds which were soluble in alkaline solutions. Ultimately, biodegradation of PAC using CFSM in the presence of 50 µM FeSO4.7H2 O for 7 days followed by washing with 3 mM NaOH reduced Au(CN)2 - uptake by 80%.

Original languageEnglish
Title of host publication22nd International Biohydrometallurgy Symposium
PublisherTrans Tech Publications Ltd
Pages43-47
Number of pages5
Volume262 SSP
ISBN (Print)9783035711806
DOIs
Publication statusPublished - 2017
Event22nd International Biohydrometallurgy Symposium, 2017 - Freiberg, Germany
Duration: Sep 24 2017Sep 27 2017

Publication series

NameSolid State Phenomena
Volume262 SSP
ISSN (Electronic)1662-9779

Other

Other22nd International Biohydrometallurgy Symposium, 2017
CountryGermany
CityFreiberg
Period9/24/179/27/17

Fingerprint

activated carbon
Gold
pretreatment
Activated carbon
Ores
minerals
Ions
gold
degradation
biodegradation
Degradation
ions
aromatic compounds
Aromatic compounds
washing
refractories
Biodegradation
cells
hydrogen peroxide
Washing

Keywords

  • Bio-treatment
  • Carbonaceous matter
  • Gold ore

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Konadu, K. T., Sasaki, K., Osseo-Asare, K., & Kaneta, T. (2017). Enzymatic pre-treatment of carbonaceous matter in preg-robbing gold ores: Effect of ferrous ion additives. In 22nd International Biohydrometallurgy Symposium (Vol. 262 SSP, pp. 43-47). (Solid State Phenomena; Vol. 262 SSP). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/SSP.262.43

Enzymatic pre-treatment of carbonaceous matter in preg-robbing gold ores : Effect of ferrous ion additives. / Konadu, Kojo T.; Sasaki, Keiko; Osseo-Asare, Kwadwo; Kaneta, Takashi.

22nd International Biohydrometallurgy Symposium. Vol. 262 SSP Trans Tech Publications Ltd, 2017. p. 43-47 (Solid State Phenomena; Vol. 262 SSP).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Konadu, KT, Sasaki, K, Osseo-Asare, K & Kaneta, T 2017, Enzymatic pre-treatment of carbonaceous matter in preg-robbing gold ores: Effect of ferrous ion additives. in 22nd International Biohydrometallurgy Symposium. vol. 262 SSP, Solid State Phenomena, vol. 262 SSP, Trans Tech Publications Ltd, pp. 43-47, 22nd International Biohydrometallurgy Symposium, 2017, Freiberg, Germany, 9/24/17. https://doi.org/10.4028/www.scientific.net/SSP.262.43
Konadu KT, Sasaki K, Osseo-Asare K, Kaneta T. Enzymatic pre-treatment of carbonaceous matter in preg-robbing gold ores: Effect of ferrous ion additives. In 22nd International Biohydrometallurgy Symposium. Vol. 262 SSP. Trans Tech Publications Ltd. 2017. p. 43-47. (Solid State Phenomena). https://doi.org/10.4028/www.scientific.net/SSP.262.43
Konadu, Kojo T. ; Sasaki, Keiko ; Osseo-Asare, Kwadwo ; Kaneta, Takashi. / Enzymatic pre-treatment of carbonaceous matter in preg-robbing gold ores : Effect of ferrous ion additives. 22nd International Biohydrometallurgy Symposium. Vol. 262 SSP Trans Tech Publications Ltd, 2017. pp. 43-47 (Solid State Phenomena).
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