Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The influence of clay brick substratum on the inhibitory efficiency of TiO2 nanocoating against biofouling
Abstract The goal of this study was to explain the influence of the total porosity and the surface roughness on the susceptibility of clay bricks to biodegradation by phototrophic microorganisms. In addition, this correlation was studied on both specimens treated with TiO2 nanocoating and untreated control specimens. The effect of UV intensity on the photocatalytic power of TiO2 was also investigated. An accelerated fouling test was performed by sprinkling a suspension of Chlorella mirabilis and Chroococcidiopsis fissurarum on sample surfaces. These two test strains were chosen because their representativeness on building clay brick façades subjected to biofouling. The gradual superficial accumulation of algal biomass on treated and control specimens was evaluated by means of image analysis and colour measurement. Two specimens' parameters, namely porosity and roughness, were examined. Results showed that both the specimen microstructure and roughness of the surface play a key role in the colonization of clay bricks because they were able to provide more nutrient to the algal cells anchored to the surface. The TiO2 nanocoating was able to inhibit the biofouling of clay bricks irradiated with UV-A light, except in the case of high porous rough specimens.
Highlights The effect of TiO2 nanocoating was investigated. Correlations between morphology of the substrata and biofouling were studied. TiO2 was able to prevent the adhesion of microorganism to the material. Total porosity and surface's roughness played a key role in the biofouling process.
The influence of clay brick substratum on the inhibitory efficiency of TiO2 nanocoating against biofouling
Abstract The goal of this study was to explain the influence of the total porosity and the surface roughness on the susceptibility of clay bricks to biodegradation by phototrophic microorganisms. In addition, this correlation was studied on both specimens treated with TiO2 nanocoating and untreated control specimens. The effect of UV intensity on the photocatalytic power of TiO2 was also investigated. An accelerated fouling test was performed by sprinkling a suspension of Chlorella mirabilis and Chroococcidiopsis fissurarum on sample surfaces. These two test strains were chosen because their representativeness on building clay brick façades subjected to biofouling. The gradual superficial accumulation of algal biomass on treated and control specimens was evaluated by means of image analysis and colour measurement. Two specimens' parameters, namely porosity and roughness, were examined. Results showed that both the specimen microstructure and roughness of the surface play a key role in the colonization of clay bricks because they were able to provide more nutrient to the algal cells anchored to the surface. The TiO2 nanocoating was able to inhibit the biofouling of clay bricks irradiated with UV-A light, except in the case of high porous rough specimens.
Highlights The effect of TiO2 nanocoating was investigated. Correlations between morphology of the substrata and biofouling were studied. TiO2 was able to prevent the adhesion of microorganism to the material. Total porosity and surface's roughness played a key role in the biofouling process.
The influence of clay brick substratum on the inhibitory efficiency of TiO2 nanocoating against biofouling
Graziani, Lorenzo (Autor:in) / Quagliarini, Enrico (Autor:in) / Osimani, Andrea (Autor:in) / Aquilanti, Lucia (Autor:in) / Clementi, Francesca (Autor:in) / D'Orazio, Marco (Autor:in)
Building and Environment ; 82 ; 128-134
10.08.2014
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2014
| British Library Online Contents | 2014
The influence of burnt clay brick waste addition on recycled brick
| Springer Verlag | 2021