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

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

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%.

本文言語英語
ホスト出版物のタイトル22nd International Biohydrometallurgy Symposium
編集者Sabrina Hedrich, Axel Schippers, Kathrin Rubberdt, Franz Glombitza, Wolfgang Sand, Wolfgang Sand, Mario Vera Veliz, Sabine Willscher
出版社Trans Tech Publications Ltd
ページ43-47
ページ数5
ISBN(印刷版)9783035711806
DOI
出版ステータス出版済み - 2017
イベント22nd International Biohydrometallurgy Symposium, 2017 - Freiberg, ドイツ
継続期間: 9 24 20179 27 2017

出版物シリーズ

名前Solid State Phenomena
262 SSP
ISSN(印刷版)1012-0394
ISSN(電子版)1662-9779

その他

その他22nd International Biohydrometallurgy Symposium, 2017
Countryドイツ
CityFreiberg
Period9/24/179/27/17

All Science Journal Classification (ASJC) codes

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

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