Zhao Teng, Du Hongxiu, Shang Ruihua
College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
College of Architecture, Taiyuan University of Technology, Taiyuan 030024, China.
Materials (Basel). 2024 Apr 19;17(8):1881. doi: 10.3390/ma17081881.
To explore the effects of the introduction order of calcium sources and the bacteria-to-calcium ratio on the microbially induced calcium carbonate precipitation (MICP) product CaCO and to achieve the regulation of CaCO crystal morphology, the mineralisation products of MICP were compared after combining bacteria and calcium at ratios of 1/9, 2/9, 3/9, 4/9, 5/9, and 6/9. A bacterial solution was combined with a urea solution in two calcium addition modes: calcium-first and calcium-later modes. Finally, under the calcium-first addition method, the output of high-purity vaterite-type CaCO was achieved at bacteria-to-calcium ratios of 2/9 and 3/9; under the calcium-later addition method, the output of calcite-type CaCO could be stabilised, and the change in the bacteria-to-calcium ratio did not have much effect on its crystalline shape.
为探究钙源引入顺序及菌钙比对微生物诱导碳酸钙沉淀（MICP）产物CaCO的影响，并实现对CaCO晶体形态的调控，将菌与钙按1/9、2/9、3/9、4/9、5/9和6/9的比例混合后，比较了MICP的矿化产物。将菌液与尿素溶液以两种加钙模式混合：先加钙模式和后加钙模式。最后，在先加钙方法下，菌钙比为2/9和3/9时可获得高纯度球霰石型CaCO的产出；在后加钙方法下，方解石型CaCO的产出可得以稳定，且菌钙比的变化对其晶形影响不大。
