2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 4: Kozlov Intl. Symp. / Sustainable Materials Recycling Processes and Products

Editors:F. Kongoli, S.V. Alexandrovich, D.V. Grigorievich, L.L. Igoryevich, I. Startsev, T.A. Vladimirovich
Publisher:Flogen Star OUTREACH
Publication Year:2019
Pages:193 pages
ISBN:978-1-989820-03-2
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Sulfobacillus Thermo Sulfidooxidans Electron Uptake from Cu-Fe Based p Electron Surface-Donors Probed by Raman and FTIR Spectroscopies

    Marios Papageorgiou1; Charalampos Tselios2; Constantinos Varotsis3;
    1CYPRUS UNIVERSITY OF TECHNOLOGY, Nicosia, Cyprus; 2CYPRUS UNIVERSITY OF TECHNOLOGY, Limassol, Cyprus; 3CYPRUS UNIVERSITY OF TECHNOLOGY, limassol, Cyprus;
    Type of Paper: Regular
    Id Paper: 236
    Topic: 7

    Abstract:

    We will present the Raman microspectroscopic detection of bornite [Cu5FeS4] -, chalcocite [Cu2S] -, and covelitte [CuS] - bacterial interactions by Sulfobacillus thermosulfidooxidans. The absorption signals of amide I, K+-jarosite [KFe3(SO4)2(OH)6] and of the produced extracellular polymeric substances (EPS) from Sulfobacillus thermosulfidooxidans as a function of position on the surfaces of the bioleached bornite, chalcocite and covellite demonstrated their heterogeneity within the surface of the minerals. We will present a direct contact mechanism for the bioleaching of bornite [Cu5FeS4] -, chalcocite [Cu2S] -, and covelitte [CuS]. [1-2]
    Raman data were collected by a LabRAM from HORIBA Jobin Yvon equipped with a CCD detector. It is equipped with an Olympus BX41 microscope 50x. The 441.1 nm excitation laser beam was provided by a Helium-Cadmium laser. The laser power incident on the sample was 20 mW and the accumulation time 15-20 min for each spectrum.

    We report for the first time the v(Cu-S) of bornite and chalcocite which are intermediates in the bioleaching of chalcopyrite and the bioleaching behavior of bornite, chalcocite and covellite with the bacteria Sulfobacillus thermo sulfidooxidans by Raman microspectroscopy and compare it with that previously reported for chalcopyrite. [3-4]

    Keywords:

    Bio-Extraction; Bio-Hydrometallurgy;

    References:

    [1] Sasaki, K., Nakamuta, Y., Hirajima, T., Tuovinen, O.H. Hydrometallurgy 95 (2009) (1-2), 153-158.
    [2] Parker, G.K., Hope, G.A., Woods, R, Colloids Surfaces A Physicochem. Eng. Asp 325 (2008) (3), 132-140.
    [3] A. Adamou, G. Manos, N. Messios, L. Georgiou, C. Xydas and C. Varotsis, Bioresour, Technol. 214 (2016) 852-855.
    [4] A. Adamou, A. Nicolaides and C. Varotsis, Miner. Eng. 132 (2019) 39-47.

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    Cite this article as:

    Papageorgiou M, Tselios C, Varotsis C. (2019). Sulfobacillus Thermo Sulfidooxidans Electron Uptake from Cu-Fe Based p Electron Surface-Donors Probed by Raman and FTIR Spectroscopies. In F. Kongoli, S.V. Alexandrovich, D.V. Grigorievich, L.L. Igoryevich, I. Startsev, T.A. Vladimirovich (Eds.), Sustainable Industrial Processing Summit SIPS2019 Volume 4: Kozlov Intl. Symp. / Sustainable Materials Recycling Processes and Products (pp. 187-192). Montreal, Canada: FLOGEN Star Outreach