Abstract
The interaction between freshwater nonsulfur purple bacteria Rhodopseudomonas sp. UZ-25p (Uzon caldera, Kamchatka, Russia) and two kaolinite samples (Zhuravlinyi Log, Chelyabinsk oblast) was investigated. Alterations in the chemical composition of the minerals and solutions, the parameters of bacterial growth, and crystal morphology and mineralogy of the kaolinite samples indicated the interactions between all components of the system (minerals, water, growth medium, and bacteria). Bacteria removed some elements from the medium, used them for growth, and promoted their transition into the mineral exchange pool. In the presence of bacteria, kaolinite cation exchange capacity increased and saturation of kaolinites with bases occured. Partial biodegradation of kaolinites, accompanied by ordering of the crystalline structure of their lamellar phase, was the main factor responsible for the increase in cation exchange capacity. For the first time anoxygenic phototrophic bacteria were found to degrade kaolinite with formation of gibbsite. The theoretical and applied significance of the experimental results is discussed.
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Original Russian Text © E.I. Kompantseva, E.B. Naimark, N.M. Boeva, A.P. Zhukhlistov, V.M. Novikov, N.S. Nikitina, 2013, published in Mikrobiologiya, 2013, Vol. 82, No. 3, pp. 323–334.
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Kompantseva, E.I., Naimark, E.B., Boeva, N.M. et al. Interaction of anoxygenic phototrophic bacteria Rhodopseudomonas sp. with kaolinite. Microbiology 82, 316–326 (2013). https://doi.org/10.1134/S0026261713030077
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DOI: https://doi.org/10.1134/S0026261713030077