Grupo de Investigación Aplicada en Materiales y Procesos (GIAMP), School of Chemical Sciences and Engineering, Yachay Tech University, Hda. San José s/n y Proyecto Yachay, Urcuquí 100119, Ecuador.
School of Biological Sciences and Engineering, Yachay Tech University, Hda. San José s/n y Proyecto Yachay, Urcuquí 100119, Ecuador.
Molecules. 2020 Nov 24;25(23):5499. doi: 10.3390/molecules25235499.
Microbiologically induced carbonate precipitation (MICP) is a well-known biogeochemical process that allows the formation of calcium carbonate deposits in the extracellular environment. The high concentration of carbonate and calcium ions on the bacterial surface, which serves as nucleation sites, promotes the calcium carbonate precipitation filling and binding deteriorated materials. Historic buildings and artwork, especially those present in open sites, are susceptible to enhanced weathering resulting from environmental agents, interaction with physical-chemical pollutants, and living organisms, among others. In this work, some published variations of a novel and ecological surface treatment of heritage structures based on MICP are presented and compared. This method has shown to be successful as a restoration, consolidation, and conservation tool for improvement of mechanical properties and prevention of unwanted gas and fluid migration from historical materials. The treatment has revealed best results on porous media matrixes; nevertheless, it can also be applied on soil, marble, concrete, clay, rocks, and limestone. MICP is proposed as a potentially safe and powerful procedure for efficient conservation of worldwide heritage structures.
微生物诱导碳酸钙沉淀（MICP）是一种众所周知的生物地球化学过程，可在细胞外环境中形成碳酸钙沉积物。细菌表面的高浓度碳酸盐和钙离子充当成核位点，促进碳酸钙沉淀填充和结合劣化材料。历史建筑和艺术品，特别是那些位于露天场所的建筑和艺术品，容易受到环境因素、与物理化学污染物相互作用以及生物等因素导致的增强风化的影响。在这项工作中，介绍并比较了一些基于 MICP 的新型生态文物表面处理方法的变体。该方法已被证明是一种成功的修复、加固和保护工具，可改善机械性能，并防止历史材料中不需要的气体和流体迁移。该处理方法在多孔介质基质上表现出最佳效果；然而，它也可以应用于土壤、大理石、混凝土、粘土、岩石和石灰岩。MICP 被提议作为一种安全且强大的程序，用于有效保护全球的文物建筑。
