/ Yu. V. Knyazev, M. S. Platunov, O. P. Ikkert [et al.]> // Environ. Sci.: Adv. - 2024. -
Vol. 3,
Is. 6. - P. 897-911,
DOI 10.1039/D4VA00040D. - Cited References: 120. - This study was supported by the Russian Science Foundation, project no. 22-24-00601 (https://rscf.ru/project/22-24-00601/). The electron microscopy and Mössbauer studies were carried out on the equipment of the Krasnoyarsk Territorial Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences. The research contribution of M. S. P. was partially supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental assignment for Synchrotron radiation facility “SKIF”, Boreskov Institute of Catalysis (project FWUR-2024-0040)
. - ISSN 2754-7000
Аннотация: We explored the role of biomineralization in industrial waste sludge formation, using the laboratory cultivation of Desulfovibrio sp. OL sulfate reducing species isolated from the Komsomolsky waste sludge (Russia). The most frequently reported sulfate-reducing bacteria (SRB) biomineralization products are various iron sulfides. Here we present first studies of the products of Desulfosporosinus metallidurans, acidophilic SRB from acid mine drainage. We analyzed the biomineralized sample using X-ray diffraction, electron microscopy, X-ray absorption and Mossbauer spectroscopies, and magnetization measurements via First-Order Reversal Curve (FORC) diagram analysis. Our findings show that the biomineralization occurring under pure culture conditions leads to the formation of greigite (Fe3S4) nanorods, along with larger microbially mediated crystals of vivianite (Fe3(PO4)2·8H2O) and siderite (FeCO3). Energy dispersive X-ray spectroscopy revealed that the crystal sizes of vivianite and siderite were comparatively larger than those of the nanorod-shaped greigite. Transmission electron microscopy and Mossbauer spectroscopy detected ultrafine ferrihydrite (Fe2O3·nH2O) superparamagnetic nanoparticles with an average size of 2.5 nm. FORC analysis showed significant magnetic interactions among these nanoparticles, suggesting their potential for magnetic separation applications. The current study demonstrates that ferrihydrite nanoparticles have a strong magnetic affinity for other crystal phases produced by Desulfosporosinus metallidurans. Therefore, we believe that the investigated bacterial species can be exploited in advanced magnetic separation techniques. This offers a cost-effective and environmentally friendly method for purifying sediments in industrial waste sludge.
Смотреть статью Держатели документа: Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Department of Plant Physiology, Biotechnology, and Bioinformatics, Tomsk State University, Tomsk, Russia
Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Kol'tsovo, Russia
Budker Institute of Nuclear Physics, Novosibirsk, Russia
Siberian Federal University, Krasnoyarsk, Russia
Institute of Solid State Chemistry and Mechanochemistry, Novosibirsk, Russia
Доп.точки доступа: Knyazev, Yu. V.; Князев, Юрий Владимирович; Platunov, M. S.; Ikkert, O. P.; Semenov, S. V.; Семёнов, Сергей Васильевич; Bayukov, O. A.; Баюков, Олег Артемьевич; Nikolenko, A. D.; Nazmov, V. P.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Smorodina, E. D.; Balaev, D. A.; Балаев, Дмитрий Александрович; Karnachuk, O. V.