Cappitelli Francesca, Toniolo Lucia, Sansonetti Antonio, Gulotta Davide, Ranalli Giancarlo, Zanardini Elisabetta, Sorlini Claudia
Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy.
Appl Environ Microbiol. 2007 Sep;73(17):5671-5. doi: 10.1128/AEM.00394-07. Epub 2007 Jun 29.
This study compares two cleaning methods, one involving an ammonium carbonate-EDTA mixture and the other involving the sulfate-reducing bacterium Desulfovibrio vulgaris subsp. vulgaris ATCC 29579, for the removal of black crust (containing gypsum) on marble of the Milan Cathedral (Italy). In contrast to the chemical cleaning method, the biological procedure resulted in more homogeneous removal of the surface deposits and preserved the patina noble under the black crust. Whereas both of the treatments converted gypsum to calcite, allowing consolidation, the chemical treatment also formed undesirable sodium sulfate.
本研究比较了两种清洁方法，一种是使用碳酸铵 - 乙二胺四乙酸混合物，另一种是使用普通脱硫弧菌脱硫弧菌亚种ATCC 29579，用于去除意大利米兰大教堂大理石上的黑色硬壳（含石膏）。与化学清洁方法相比，生物方法能更均匀地去除表面沉积物，并保留黑色硬壳下的珍贵铜绿。虽然两种处理方法都将石膏转化为方解石，实现了加固，但化学处理还生成了不良的硫酸钠。
