Evaluation of the effectiveness of CuONPs/SiO2-based treatments for building stones against the growth of phototrophic microorganisms
| Autor: | M.L. Almoraima Gil, Julián Blasco, Maria J. Mosquera, Rafael Zarzuela, Ignacio Moreno-Garrido |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Phototroph
Chemistry Microorganism Algal growth 02 engineering and technology Building and Construction 010501 environmental sciences 021001 nanoscience & nanotechnology Pulp and paper industry 01 natural sciences Chemical agents General Materials Science 0210 nano-technology 0105 earth and related environmental sciences Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 187:501-509 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2018.07.116 |
| Popis: | Colonization by phototrophic microorganisms causes a range of problems for building facades, The combination of biological physical and chemical agents accelerates the decay of materials. For this reason, in recent years there has been a growing interest in the application of multifunctional treatments that combine consolidant and biocidal action. In this study, the effectiveness of a nano-structured CuONPs/SiO2-based multifunctional treatment for the prevention of algal growth was evaluated on two different stones by using two complementary techniques, namely Chlorophyll a fluorescence and spectrophotometric determination. The results showed a delay in the algal colonization for two reasons: (1) The SiO2 matrix modified the roughness and surface tension, thus delaying the initial setting, and (2) the CuONPs decreased the viability of the phototrophic organisms at longer exposure times. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect