Successful combination of chemical and biological treatments for the cleaning of stone artworks
Articolo
Data di Pubblicazione:
2013
Citazione:
Successful combination of chemical and biological treatments for the cleaning of stone artworks / F. Troiano, D. Gulotta, A. Balloi, A. Polo, L. Toniolo, E. Lombardi, D. Daffonchio, C. Sorlini, F. Cappitelli. - In: INTERNATIONAL BIODETERIORATION & BIODEGRADATION. - ISSN 0964-8305. - 85:(2013), pp. 294-304. [10.1016/j.ibiod.2013.08.011]
Abstract:
The removal of sulfate-based crusts from stone artworks using sulfate-reducing bacteria (SRB) has been proven to be an effective cleaning procedure. However, some concerns still remain: it is a time-consuming process when the crust is thick, and it is not clear how the biotechnological approach can fit within a complex conservation treatment. To address these challenges, the effects of an SRB strain (Desulfovibrio vulgaris subsp. vulgaris ATCC 29579) coupled with a non-ionic detergent pre-treatment was studied on a stone column affected by black crusts. The coupling of the two treatments removed the black crust without affecting the original sound marble, with 38% reduction in cleaning time. The combined method was later applied to a one-century-old artistic marble statue weathered by sulfate-based crusts and grey deposits. The detergent used alone effectively removed the grey deposit, but not the black crust. However the co-treatment synergy resulted in the complete removal of the black crust layers, with the added advantage, compared to the biocleaning alone, of fewer biological applications and a 70% reduction in total cleaning time, but still retaining all the advantages of the biocleaning approach.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Artistic stone; Biocleaning; Black crusts; Grey deposit; Sulphate-reducing bacteria; Synergic cleaning
Elenco autori:
F. Troiano, D. Gulotta, A. Balloi, A. Polo, L. Toniolo, E. Lombardi, D. Daffonchio, C. Sorlini, F. Cappitelli
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