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Scientific, Technological and Production Journal
ISSN 2079–3332 (print)
ISSN 3034-6835 (online)
founded in 2001

Study of the influence of ultrasonic influenceon the kinetics of the process of bacterial-chemical leaching of metals

Original articles: 2024 No 5

Study of the influence of ultrasonic influenceon the kinetics of the process of bacterial-chemical leaching of metals

DOI: 10.56195/20793332_2024_5_44_48

Read in pdf V. A. Iodis, S. O. Ocheretyana
  1. Research Geotechnological Center, Far Eastern Branch of Russian Academy of Sciences, Petropavlovsk-Kamchatsky, Russian Federation
p. 44-48, No.5/2024
Abstract:
This work was carried out to study the effect of ultrasonic treatment of ore pulp on the kinetics of the process of bacterialchemical leaching of metals. The intensities of ultrasonic vibrations chosen for the experiment were 4.0, 7.2, 11.0, 21.0 W/cm2, at a frequency of 22 kHz, and the total power of the ultrasonic vibration generator was 400 W. Ultrasonic treatment in the flow chamber of a mounted laboratory installation was carried out for 30 minutes. After 1, 3, 10, 15 and 30 minutes, samples were taken, pH, Eh and the number of microorganism cells in 1 ml of ore pulp were determined. Analysis of literature data showed that ultrasonic treatment with an intensity of more than 20 W/cm2 of the solid phase of ore pulp for 15–20 minutes ensures the cleaning of the surface of crystalline phases from oxide films. This will intensify the process of bacterial-chemical leaching. The experiments showed that ultrasonic exposure at an intensity of 21 W/cm2 and higher, with a process duration of more than 1200 s, and an oscillation frequency of 22 kHz, inactivates microorganisms, which will reduce the kinetics of the bacterial-chemical leaching process. It follows from this that in order to increase the kinetics of the process, it is advisable to separately apply ultrasound to the ore pulp to clean the surface of oxide films, then mix the pulp with a bacterial suspension and carry out the process of bacterial-chemical leaching.
Keywords:
bacterial-chemical leaching, ultrasonic influence, ore pulp, oxide films, pH, Eh, chemolithotrophic microorganisms, laboratory installation
For citation:
Iodis V. A., Ocheretyana S. O. Study of the influence of ultrasonic influence on the kinetics of the process of bacterial-chemical leaching of metals. Mine Surveying and Subsurface Use. 2024;(5):44-48. (In Russ.). https://doi.org/10.56195/20793332_2024_5_44_48.
Information about the authors:
  1. Valentin A. Iodis – Cand. Sci. (Eng.), Leading Researcher, Research Geotechnological Center, Far Eastern Branch of Russian Academy of Sciences, Kamchatka Krai, Petropavlovsk-Kamchatsky, Russian Federation, https://orcid.org/0000-0001-8002-0658, ResearcherID AEF-2566-2022, Scopus Author ID –58790763900, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
  2. Svetlana O. Ocheretyana – Cand. Sci. (Biol.), Senior Researcher, Research Geotechnological Center, Far Eastern Branch of Russian Academy of Sciences, Kamchatka Krai, Petropavlovsk-Kamchatsky, Russian Federation, https://orcid.org/0009-0008-6221-8239, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
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