Lyu Jiejie, Li Fuchun, Long Haoran, Zhu Xinru, Fu Nan, Guo Ziqi, Zhang Weiqing
Department of Geography, Fuyang Normal University China.
College of Resource and Environment, Nanjing Agricultural University China
RSC Adv. 2024 Jan 2;14(1):353-363. doi: 10.1039/d3ra06803j.
The elucidation of carbonate crystal growth mechanisms contributes to a deeper comprehension of microbial-induced carbonate precipitation processes. In this research, the HJ-1 strain, well-known for its proficiency in inducing carbonate mineralization, was employed to trigger the formation of concave-type carbonate minerals. The study meticulously tracked the temporal alterations in the culture solution and conducted comprehensive analyses of the precipitated minerals' mineralogy and morphology using advanced techniques such as X-ray diffraction, scanning electron microscopy, focused ion beam, and transmission electron microscopy. The findings unequivocally demonstrate that concave-type carbonate minerals are meticulously templated by bacterial biofilms and employ calcified bacteria as their fundamental structural components. The precise morphological evolution pathway can be delineated as follows: initiation with the formation of bacterial biofilms, followed by the aggregation of calcified bacterial clusters, ultimately leading to the emergence of concave-type minerals characterized by disc-shaped, sunflower-shaped, and spherical morphologies.
碳酸盐晶体生长机制的阐明有助于更深入地理解微生物诱导的碳酸盐沉淀过程。在本研究中，以其诱导碳酸盐矿化能力而闻名的HJ-1菌株被用于触发凹型碳酸盐矿物的形成。该研究精心追踪了培养液中的时间变化，并使用X射线衍射、扫描电子显微镜、聚焦离子束和透射电子显微镜等先进技术对沉淀矿物的矿物学和形态进行了全面分析。研究结果明确表明，凹型碳酸盐矿物是由细菌生物膜精心模板化的，并以钙化细菌作为其基本结构成分。精确的形态演化途径可以描述如下：首先形成细菌生物膜，然后是钙化细菌簇的聚集，最终导致出现具有盘状、向日葵状和球形形态的凹型矿物。
