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...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of environmental chemical engineering 2023-02, Vol.11 (1), p.108990, Article 108990
Hauptverfasser: Su, Zhimeng, Deng, Zelan, Wang, Yazhi, Ji, Chen, Li, Fuchun, Yang, Guoguo, Huang, Lingjie
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
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 
ISSN:2213-3437
2213-3437
DOI:10.1016/j.jece.2022.108990