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Precipitation of Carbonate Minerals Induced by the Halophilic Chromohalobacter Israelensis under High Salt Concentrations: Implications for Natural Environments
Han, Zuozhen1,2; Li, Dan1; Zhao, Hui2,3; Yan, Huaxiao2,3; Li, Peiyuan1
2017-06-01
发表期刊MINERALS
卷号7期号:6
文章类型Article
摘要The precipitation of carbonate minerals induced by halophilic bacteria has aroused wide concern. The study aimed to investigate the characterization and process of biomineralization in high salt systems by halophilic Chromohalobacter israelensis LD532 (GenBank: KX766026) bacteria, isolated from the Yinjiashan Saltern in China. Carbonate minerals were induced in magnesium sulfate and magnesium chloride medium, respectively. The mineral phase, morphology, and elemental composition of minerals were analyzed using X-ray p owder diffraction, scanning electron microscopy, and energy dispersive X-ray detection. Cells and ultrathin slices were studied using high resolution transmission electron microscopy, selected area electron diffraction, and energy dispersive X-ray detection. The carbonic anhydrase and ammonia released from LD532 bacteria increased pH of the medium and promoted the carbonate precipitation. Magnesium calcite and aragonite were induced by LD532 bacteria in magnesium chloride medium at an Mg/Ca molar ratio of 2, while Magnesium calcite and monohydrocalcite were precipitated in magnesium sulfate medium at the same Mg/Ca ratio, only monohydrocalcite were formed in both control groups. The morphologies and compositions of minerals in MgSO4 and MgCl2 solutions displayed significant differences, indicating different Mg2+ could affect physiological and biochemical activities of LD532 bacteria and thus affect the mineral deposition. Further study showed the nucleation sites were located on extracellular polymeric substances and intracellular vesicles of LD532 bacteria. This study is beneficial to the mechanism of carbonate biomineralization in natural salt environments.
关键词Biomineralization Halophilic Bacteria Magnesium Chloride Magnesium Sulfate Mg/ca Ratios Nucleation Sites
DOI10.3390/min7060095
收录类别SCI
语种英语
WOS记录号WOS:000404047800010
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/137117
专题海洋地质与环境重点实验室
作者单位1.Coll Earth Sci & Engn, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao 266590, Peoples R China
2.Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
3.Shandong Univ Sci & Technol, Dept Bioengn, Coll Chem & Environm Engn, Qingdao 266590, Peoples R China
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GB/T 7714
Han, Zuozhen,Li, Dan,Zhao, Hui,et al. Precipitation of Carbonate Minerals Induced by the Halophilic Chromohalobacter Israelensis under High Salt Concentrations: Implications for Natural Environments[J]. MINERALS,2017,7(6).
APA Han, Zuozhen,Li, Dan,Zhao, Hui,Yan, Huaxiao,&Li, Peiyuan.(2017).Precipitation of Carbonate Minerals Induced by the Halophilic Chromohalobacter Israelensis under High Salt Concentrations: Implications for Natural Environments.MINERALS,7(6).
MLA Han, Zuozhen,et al."Precipitation of Carbonate Minerals Induced by the Halophilic Chromohalobacter Israelensis under High Salt Concentrations: Implications for Natural Environments".MINERALS 7.6(2017).
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