一种假单胞菌诱导CaCO3结晶

选用实验室自培育斯氏假单胞菌，通过测定pH值、电导率变化研究了细菌液、菌体液对碳酸钙结晶过程的影响，并通过SEM、XRD、红外等测试技术对生成的碳酸钙进行表征。 研究表明，斯氏假单胞菌细菌液与菌体液对碳酸钙结晶过程具有抑制作用，浓度增加，抑制作用越显著。 SEM、XRD和红外光谱的分析结果显示，细菌液可诱导亚稳态球霰石生成，菌体液能诱导出中孔方解石型碳酸钙。

Calcium Carbonate Formation Induced by Pseudomonas

Pseudomonas stutzeri cultured in the lab were chosen to study their influences, including concentration of bacterial solution and bacterial bodies′ solution, on calcium carbonate crystal growth. The kinetics and morphological variation of calcium carbonate were studied by measuring the pH and conductivity of the growth solutions. The products were characterized by XRD, SEM and FT-IR, respectively. Experimental results show that bacterial solution and bacterial bodies′ solution could restrain the calcium carbonate crystallization process. Such effect could be enhanced with the increase of the concentration of bacterial solution or bacterial bodies′ solution. On the basis of these results, it is fairly to speculate that the electrostatic and coordination interactions between polar groups of organic substances and Ca²⁺ are responsible for this morphological change. The bacterial solution could induce the formation of spherical metastable vaterite. The bacterial bodies′ solution could induce the formation of hollow calcite.