Consolidation of degraded ornamental porous limestone stone by calcium carbonate precipitation induced by the microbiota inhabiting the stone
Consolidation of degraded ornamental porous limestone stone by calcium carbonate precipitation induced by the microbiota inhabiting the stone
复制标题
DOI：
10.1016/j.chemosphere.2007.02.044
复制
发表时间：
2007-08-01
期刊：
影响因子：
8.8
通讯作者：
Gonzalez-Munoz, M. T.
中科院分区：
文献类型：
--
作者：
Jimenez-Lopez, C.;Rodriguez-Navarro, C.;Gonzalez-Munoz, M. T.
虽然已经表明，可以通过使用细菌接种的培养基来固结石灰石，但是更用户友好的方法是原位应用无菌培养基，该无菌培养基能够在石头的微生物群落中激活具有碳酸钙沉淀潜力的那些细菌。为了测试这种新的石材固结方法，将未灭菌的腐烂多孔石灰石浸入无菌营养介质中。结果进行了比较，在这些运行中，石头灭菌之前的治疗是使用。通过记录培养基化学的演变来确定微生物群落对石材固结的影响。测试经处理的石头的机械阻力和孔隙率。结果表明，测试的介质能够激活来自石头的微生物群落的细菌。由于这些细菌的生长，发生碱化，导致碳酸钙沉淀。新的沉淀物与基底相容，并且固结石头而不堵塞孔隙。因此，一个很好的候选人，在原位巩固腐烂的多孔石灰石是本研究中指定的特性的无菌培养基的应用。(C)2007爱思唯尔有限公司保留所有权利。
Although it has already been shown that calcareous stone can be consolidated by using a bacterially inoculated culture medium, a more user-friendly method is the in situ application of a sterile culture medium that is able to activate, among the microbial community of the stone, those bacteria vith a potential for calcium carbonate precipitation. In order to test this new method for stone consolidation, non-sterilized decayed porous limestone was immersed in sterile nutritional media. Results were compared to those of the runs in which stone sterilized prior to the treatment was used. The effects of the microbial community on stone consolidation were determined by recording the evolution of the culture media chemistry. The treated stone was tested for mechanical resistance and porosity. Results demonstrate that the tested media were able to activate bacteria from the microbial community of the stone. As a consequence of the growth of these bacteria, an alkalinization occurred that resulted in calcium carbonate precipitation. The new precipitate was compatible with the substrate and consolidated the stone without pore plugging. Therefore, a good candidate to in situ consolidate decayed porous limestone is the application of a sterile culture medium with the characteristics specified in the present study. (C) 2007 Elsevier Ltd. All rights reserved.