微生物矿化制备碳酸锶晶体

Preparation of Strontium Carbonate Crystals Using Biomineralization

利用微生物繁殖过程产生的酶化作用,适时引入Sr2+,形成碳酸盐矿物沉淀,通过能谱(EDS)、X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、傅里叶变换红外光谱(FT-IR)、综合热分析仪(DSC-TG)对碳酸锶样品形貌、结构、热性质等进行表征。结果表明,微生物诱导沉淀的碳酸锶含有少量有机物质,形貌为近球形,表面多孔,部分团聚形成无规则块体,属于正交晶系。菌体和代谢物在碳酸锶晶体成核、生长及堆积过程中扮演重要的角色。

The strontium carbonate precipitate was induced using enzymes in the microbe reproduction and the morphology, structure and thermal decomposition properties of the strontium carbonate precipitates were characterized by EDS, SEM, FTIR, XRD, DSC-TGA. The results indicate that strontium carbonate precipitate induced in microbe contains a small amount of organic matters and has sphere-like shaped structure with porous surface, and its crystal belongs to orthorhombic crystalline. Bacteria and metabolites play an important role in the process of crystal nucleation, growth and accumulation of strontium carbonate.