@inproceedings{cd0440577e3340a6aabae602adc1e01b,
title = "Enzymatic pre-treatment of carbonaceous matter in preg-robbing gold ores: Effect of ferrous ion additives",
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%.",
author = "Konadu, {Kojo T.} and Keiko Sasaki and Kwadwo Osseo-Asare and Takashi Kaneta",
note = "Publisher Copyright: {\textcopyright} 2017 Trans Tech Publications, Switzerland. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; 22nd International Biohydrometallurgy Symposium, 2017 ; Conference date: 24-09-2017 Through 27-09-2017",
year = "2017",
doi = "10.4028/www.scientific.net/SSP.262.43",
language = "English",
isbn = "9783035711806",
series = "Solid State Phenomena",
publisher = "Trans Tech Publications Ltd",
pages = "43--47",
editor = "Sabrina Hedrich and Axel Schippers and Kathrin Rubberdt and Franz Glombitza and Wolfgang Sand and Wolfgang Sand and Veliz, {Mario Vera} and Sabine Willscher",
booktitle = "22nd International Biohydrometallurgy Symposium",
}