Changes in Metal Leachability through Stimulation of Iron Reducing Communities within Waste Sludge

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Bioreduction of ferric iron-rich wastes is a rapidly emerging technology for the extraction/ recovery of metals from low-grade ores and metallurgical wastes. However, despite studies being successful, they have only been demonstrated at laboratory scale and issues relating to economic, industrial scale application have yet to be studied. Using bioreduction as a pre-treatment to increase recovery yield is a relatively new concept. This study examines the biostimulation of microbial communities to induce bioreduction of metalliferous sludge and the effect that this has on the leachability of metals from the waste using dilute sulphuric acid. Data shows an increase in both zinc and copper leachability after bioreduction, with maximum six fold and eleven fold increase (compared to pre-treatment) in the amount of zinc and copper leached respectively.

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Periodical:

Solid State Phenomena (Volume 262)

Edited by:

Sabrina Hedrich, Kathrin Rübberdt, Franz Glombitza, Wolfgang Sand, Axel Schippers, Mario Vera Véliz and Sabine Willscher

Pages:

269-272

Citation:

M. Roberts et al., "Changes in Metal Leachability through Stimulation of Iron Reducing Communities within Waste Sludge", Solid State Phenomena, Vol. 262, pp. 269-272, 2017

Online since:

August 2017

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$41.00

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[1] C. L. Brierley, How will bioming be applied in future. Trans. Nonferr. Metals Soc. China. 18 (2008) 1302-1310.

[2] D. B. Johnson, Development and application of biotechnologies in the metal mining industry, Environ. Sci. Pollut. Res. Int. 20 (2013) 7768-7776.

DOI: https://doi.org/10.1007/s11356-013-1482-7

[3] J. Zachara, Solubilization of Fe(III) oxide-bound trace metals by a dissimilatory Fe(III) reducing bacterium. Geochim. Cosmochim. Acta. 65 (2001) 75-93.

DOI: https://doi.org/10.1016/s0016-7037(00)00500-7

[4] D. B. Johnson, Reductive dissolution of minerals and selective recovery of metals using acidophilic iron- and sulfate-reducing acidophiles, Hydrometallurgy 127-128 (2012) 172-177.

DOI: https://doi.org/10.1016/j.hydromet.2012.07.015

[5] D.B. Johnson, C.A. du Plessis, Biomining in reverse gear: Using bacteria to extract metals from oxidised ores, Miner. Eng. (2014).

DOI: https://doi.org/10.1016/j.mineng.2014.09.024

[6] K.B. Hallberg, Reductive dissolution of ferric iron minerals: A new approach for bio-processing nickel laterites. Miner. Eng. 24 (2011) 620-624.

DOI: https://doi.org/10.1016/j.mineng.2010.09.005

[7] I. Nancucheo, Extraction of copper from an oxidized (lateritic) ore using bacterially catalysed reductive dissolution. Appl. Microbiol. Biotechnol. 98 (2014) 6297-6305.

DOI: https://doi.org/10.1007/s00253-014-5687-6

[8] P. Rusin, Bioprocessing of refractory oxide ores by bioreduction: extraction of silver, molybdenum and copper, Miner. Eng. 5 (1995) 10-12.

DOI: https://doi.org/10.1016/0892-6875(92)90170-e

[9] J. Esther, Effect of dissimilatory Fe(III) reducers on bio-reduction and nickel-cobalt recovery from Sukinda chromite-overburden. Bioresour. Technol. 146 (2013) 762-766.

DOI: https://doi.org/10.1016/j.biortech.2013.07.103

[10] Y. Qu, Bioleaching of heavy metals from red mud using Aspergillus niger. Hydrometallurgy, 2013. 136: pp.71-77.

DOI: https://doi.org/10.1016/j.hydromet.2013.03.006

[11] Dzombek, D., F. Morel, Surface Complexation Modeling: Hydrous Ferric Oxide. 1990: Wiley Interscience. 393.

[12] J. Esther, Enhanced recovery of nickel from chromite overburden (COB) using dissimilatory Fe (III) reducers: A novel Bio-Reduction Acid Leaching (BRAL) approach. Hydrometallurgy. 155 (2015) 110-117.

DOI: https://doi.org/10.1016/j.hydromet.2015.04.019