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Preparation and Targeted Regulation of Microbial Induced Mineralized Products

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Microbial induced mineralization is an effective method to prepare green cementitious materials, which has the characteristics of ecological and environmental protection. In this study, preparation and targeting regulation of mineralized products by Bacillus lysine induced was investigated. Law of growth and reproduction was studied via change curves of concentration and pH value of culture solution in the culture process. Four periods, included retardation phase, logarithmic phase, stable phase and decline phase, were verified. The pH value of culture solution was on the rise throughout the culture process, which increased from 7 to 8.1. Characteristics of enzyme production were explored by the deposition of mineralized products in different systems, and the way of extracellular production enzyme was determined. The composition and microstructure of mineralized products were analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray spectroscopy (EDS). The mineralized products were characterized as calcite, and mineralized products in the culture solution had higher crystallinity. Finally, targeting regulation of temperature on mineralized products was conducted. At the low temperature, mineralization efficiency was higher, and the structure of mineralized products was more favorable.
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Keywords: BACILLUS LYSINE; BIOLOGICAL CHARACTERISTICS; CALCITE; MICROBIAL INDUCED; MINERALIZATION; TARGETING REGULATION

Document Type: Research Article

Publication date: January 1, 2020

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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