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Biocleaning of cultural heritage stone surfaces and frescoes : which delivery system can be the most appropriate?
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Bosch-Roig, Pilar, Lustrato, Giuseppe, Zanardini, Elisabetta and Ranalli, Giancarlo (2015) Biocleaning of cultural heritage stone surfaces and frescoes : which delivery system can be the most appropriate? Annals of Microbiology, 65 (3). pp. 1227-1241. doi:10.1007/s13213-014-0938-4 ISSN 1590-4261.
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Official URL: http://dx.doi.org/10.1007/s13213-014-0938-4
Abstract
An interdisciplinary analytical campaign was carried out on the exterior walls of the Santa Maria della Bruna and Sant’Eustachio Cathedral in Matera. Large areas of these walls have become darkened and the main objective was to evaluate the state of conservation of the stone material (a very porous, organogenic limestone called “Pietra di Matera”), and to suggest the best strategy for the current restoration. Several techniques were used in situ and ex situ-in laboratory analyses: X-ray diffraction, infrared spectroscopy, ion chromatography, pyrolysis/gas chromatography coupled with mass spectrometry, colour change measurements, laser-induced fluorescence together with biological techniques. Ex-situ and in situ cleaning tests were also carried out on the stone surface.
The results showed the presence of chlorophyll and bacteria on the surface, together with sulfation and calcium oxalate films as the main decay phenomena. In addition, the determination of saccharide and egg residues suggest both biological activity and past conservative treatments as the cause of oxalate films. Data obtained from the analyses proved to be very useful for the conservation work; a complex plan of restoration was adopted, including both traditional and innovative techniques (such as biocleaning, bacterial-gel and a laser system) together with a final evaluation of several protective methods.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
Journal or Publication Title: | Annals of Microbiology | ||||
Publisher: | Springer | ||||
ISSN: | 1590-4261 | ||||
Official Date: | 15 November 2015 | ||||
Dates: |
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Volume: | 65 | ||||
Number: | 3 | ||||
Page Range: | pp. 1227-1241 | ||||
DOI: | 10.1007/s13213-014-0938-4 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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