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ISSN 0003-6838, Applied Biochemistry and Microbiology, 2019, Vol. 55, No. 1, pp. 48–51. © Pleiades Publishing, Inc., 2019. Russian Text © N.V. Fomchenko, M.I. Muravyov, 2019, published in Prikladnaya Biokhimiya i Mikrobiologiya, 2019, Vol. 55, No. 1, pp. 64–68. Analysis of Waste Quality for Two-Step Biohydrometallurgical Processing of Copper–Zinc Concentrate a, a N. V. Fomchenko * and M. I. Muravyov Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, Moscow, 119071 Russia *e-mail: natalya.fomchenko@gmail.com Received April 20, 2018; revised July 16, 2018; accepted July 25, 2018 Abstract—Iron and non-ferrous metals has been shown to accumulate in the liquid phase during the two-step biohydrometallurgical treatment of copper–zinc concentrate. The removal of iron as a precipitate from a solution obtained after ferric leaching of the concentrate and its subsequent bioregeneration has been studied. Iron was almost completely (98.3%) removed from the liquid phase as jarosite, and the pH value increased up to 2.4 with the addition of lime. About 95% of non-ferrous metals remained in the solution as sulfates. Comparative analysis of the obtained precipitates (including waste from the two-step process) showed that the loss of non-ferrous metals for them was lower than that in waste from the
Applied Biochemistry and Microbiology – Springer Journals
Published: Apr 1, 2019
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