Effects of the Sr/Ca ratio on the bioremediation of strontium based on microbially-induced carbonate precipitation
90Sr is a radionuclide that poses a potential threat to ecosystem security, and Sr bioremediation based on microbially-induced carbonate precipitation (MICP) usually affected by Ca. Experiments of carbonate mineralization induced by Enterobacter sp. JC-1 in solution with different Sr/Ca molar ratios...
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Veröffentlicht in: | Journal of environmental chemical engineering 2023-02, Vol.11 (1), p.108990, Article 108990 |
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Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 90Sr is a radionuclide that poses a potential threat to ecosystem security, and Sr bioremediation based on microbially-induced carbonate precipitation (MICP) usually affected by Ca. Experiments of carbonate mineralization induced by Enterobacter sp. JC-1 in solution with different Sr/Ca molar ratios were performed to explore the effect of Sr/Ca ratio on microbially-induced carbonate precipitation. X-ray diffraction patterns indicated that strain JC-1 induced the formation of calcite (Sr/Ca < 1) and strontianite (Sr/Ca = 1), and the increase in the d(104) and d(012) of calcite indicated that Sr entered the calcite lattice. The normalized distribution coefficient of Sr (DSr) in the minerals indicated that a higher Sr/Ca ratio promoted Sr incorporation into minerals. Sr2+ removal showed a V-shape (initial decrease and subsequent increase) with an increase in Sr/Ca ratio, which had no correlation with the DSr, but was positively correlated with the mass of CO32- (r = 0.779, p |
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ISSN: | 2213-3437 2213-3437 |
DOI: | 10.1016/j.jece.2022.108990 |