阿格拉
生物膜
胞外聚合物
胞外多糖
化学
环境化学
表征(材料科学)
生物
生态学
纳米技术
细菌
材料科学
有机化学
多糖
遗传学
作者
Deepankar Banerjee,Sabyasachi Sarkar,Rajendra Yadav,Munesh Singh
标识
DOI:10.1016/j.vibspec.2024.103652
摘要
The Taj Mahal and its complex are iconic symbols of India's cultural heritage, and preserving their appearance and structural integrity is of utmost importance. The discoloration of ancient heritage structures caused by microbial soiling, particularly the action of cyanobacteria, green algae, and lichens, and the role of Extracellular Polymeric Substances (EPS) secreted by these microorganisms, is an important interdisciplinary study. These microorganisms colonize the surfaces of monuments, leading to aesthetic and structural issues. Various analytical techniques like optical microscopy, FTIR (Fourier-transform infrared spectroscopy), XRD (X-ray diffraction), and Scanning Electron Microscopy (SEM) were used to characterize the biofilm and its components. FTIR analysis revealed interactions between EPS and Nano iron oxide in the biofilm, which contributes to surface discoloration. Airborne particulates minerals such as quartz, feldspar, calcite, and hematite are significant source of surface crust on these monuments. This analytical approach has allowed to unravel the complex features of surface discoloration on these historic structures leading to apply appropriate conservation measures.
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