Abstract
As a kind of solid waste with a high silicon content, electrolytic manganese residue (EMR) can be utilized as silicon source by plants through bioleaching processes. EMR contains a variety of silicate minerals. In order to determine the source of available silicon in the bioleaching process of EMR, it is necessary to investigate the influence of silicate minerals in EMR on silicon-activating behavior of specific minerals. In this study, Ochrobactium sp. T-07-B was used to conduct bioleaching experiments on five kinds of silicate minerals with different structures (quartz, muscovite, biotite, olivine, and rhodonite); the growth of Ochrobactium sp. T-07-B, their acid- and polysaccharide-producing capacity, and evolution of surface morphology and structure of the silicate minerals in different systems were determined, so as to explore the silicon-activating capacity of Ochrobactium sp. T-07-B and the selectivity toward different minerals in the bioleaching process. Results showed that the effects of Ochrobactium sp. T-07-B for different silicate minerals were obviously different, and the sequence of silicon-activating efficiency from high to low was as follows: muscovite (65.84 mg·L−1) > biotite (63.84 mg·L−1) > olivine (55.76 mg·L−1) > rhodonite (50.98 mg·L−1) > quartz (23.63 mg·L−1). Results of this study may be of guiding significance for the future research on the silicon-activating behavior of solid waste.
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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
We thank South-Central University for Nationalities and National Engineering Laboratory of Biohydrometallurgy, GRINM Group Corporation Limited, China, for their support during the experiments.
Funding
This project is financially supported by the National Natural Science Foundation of China (grant numbers 51804354, 51974279), the National Key Research & Development Program of China (grant numbers 2018YFC18018, 2018YFC18027), KeJunPing (2018) No. 159, the Guangxi Scientific Research and Technology Development Plan (grant numbers GuikeAB16380287 and GuikeAB17129025), and GRINM Science and Development (grant number 2020 No 75), which are greatly appreciated.
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Jia Li provided the idea of this work. Ying Lv and Zhenxing Chen performed the experiments, collected samples, and detected and analyzed the data. Ying Lv and Xuan Ke prepared the figures and wrote the manuscript. Ying Lv and Zhenxing Chen detected physiochemical properties. Xingyu Liu, Bowei Chen, Mingjiang Zhang, and Tian C. Zhang were involved in experimental design. Tian C. Zhang revised the manuscript. All the authors contributed to the article and approved the submitted version.
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Highlights
• The crystal structure of silicate minerals influences the silicon-activating effect.
• Ochrobactium sp. T-07-B is selective in different silicate minerals regarding silicon activation.
• The growth and metabolic capacities of Ochrobactium sp. T-07-B are different.
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Lv, Y., Li, J., Chen, Z. et al. Effects of different silicate minerals on silicon activation by Ochrobactium sp. T-07-B. Environ Sci Pollut Res 29, 87393–87401 (2022). https://doi.org/10.1007/s11356-022-21824-4
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DOI: https://doi.org/10.1007/s11356-022-21824-4