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Natural limestone discolouration triggered by microbial activity-a contribution.

Luís Dias1,2, Tânia Rosado1, Ana Coelho1,2

  • 1HERCULES Laboratory, University of Évora, Largo Marquês de Marialva 8, 7000-089 Évora, Portugal.

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Blue limestone

Keywords:
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Area of Science:

  • Geology
  • Material Science
  • Microbiology

Background:

  • Blue limestone is a popular building material, but susceptible to color change and deterioration.
  • Alteration of blue limestone leads to costly conservation and restoration efforts.

Purpose of the Study:

  • To investigate the chemical, mineralogical, and microbial factors contributing to blue limestone alteration.
  • To understand how these factors impact the stone's color and durability.

Main Methods:

  • A multidisciplinary approach was employed.
  • Analysis of inorganic alterations.
  • Identification of microbial communities.

Main Results:

  • Inorganic alteration processes in blue limestone create conditions conducive to microbial growth.
  • Microbial activity may accelerate the deterioration of blue limestone.

Conclusions:

  • Understanding the interplay between inorganic alteration and microbial communities is crucial for blue limestone conservation.
  • Preventing or mitigating these alteration processes can reduce restoration costs and preserve the aesthetic integrity of stone structures.