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A platform for research: civil engineering, architecture and urbanism
Biotreatment of ceramic bricks: The impact of the application method of an innovative bioproduct on biomineralization
Graphical abstract Display Omitted
Highlights An innovative bioproduct produced by Escherichia coli cultures supplemented with iron was developed. Lyophilized bioproduct upon resuspension was applied by 5 different methods on ceramic brick’s surfaces. Dropping, brushing and spraying were the most efficient methods to improve resistance to water absorption. The effect was attributed to the formation of a biofilm and silica biomineralization (biosilicification). This bioproduct may represent a promising solution for compatible and ecological heritage conservation.
Abstract The effect of biological treatments on protection of exposed construction materials in the built heritage may have great potential. This work reports the efficacy of several techniques (dropping, spraying, brushing, poulticing and absorption by capillarity) to apply a new bioproduct, produced by Escherichia coli cultures supplemented with iron, aiming to treat the surface of ceramic bricks. The results showed that most biotreatments improved the ceramic bricks resistance to water absorption, depending on the method of application of the bioproduct. Nevertheless, within the error range, the most efficient biotreatments were observed when the bioproduct was applied by dropping, brushing and spraying. The bioproduct analyzed in the present study can be stored and easily transported to construction sites, where it can be readily prepared by resuspension of the dried bioproduct in tap water. The water resistance effect of the bioproduct was attributed to the presence of a gelatinous biofilm and to the formation of amorphous biosilica aggregates (biomineralization by biosilicification) that filled the pores and voids of bricks samples. Acting as a mild water repellent agent, it may be a promising solution for protection of ceramic bricks, reducing the degradation rate, namely for compatible and ecological architectural heritage conservation practices.
Biotreatment of ceramic bricks: The impact of the application method of an innovative bioproduct on biomineralization
Graphical abstract Display Omitted
Highlights An innovative bioproduct produced by Escherichia coli cultures supplemented with iron was developed. Lyophilized bioproduct upon resuspension was applied by 5 different methods on ceramic brick’s surfaces. Dropping, brushing and spraying were the most efficient methods to improve resistance to water absorption. The effect was attributed to the formation of a biofilm and silica biomineralization (biosilicification). This bioproduct may represent a promising solution for compatible and ecological heritage conservation.
Abstract The effect of biological treatments on protection of exposed construction materials in the built heritage may have great potential. This work reports the efficacy of several techniques (dropping, spraying, brushing, poulticing and absorption by capillarity) to apply a new bioproduct, produced by Escherichia coli cultures supplemented with iron, aiming to treat the surface of ceramic bricks. The results showed that most biotreatments improved the ceramic bricks resistance to water absorption, depending on the method of application of the bioproduct. Nevertheless, within the error range, the most efficient biotreatments were observed when the bioproduct was applied by dropping, brushing and spraying. The bioproduct analyzed in the present study can be stored and easily transported to construction sites, where it can be readily prepared by resuspension of the dried bioproduct in tap water. The water resistance effect of the bioproduct was attributed to the presence of a gelatinous biofilm and to the formation of amorphous biosilica aggregates (biomineralization by biosilicification) that filled the pores and voids of bricks samples. Acting as a mild water repellent agent, it may be a promising solution for protection of ceramic bricks, reducing the degradation rate, namely for compatible and ecological architectural heritage conservation practices.
Biotreatment of ceramic bricks: The impact of the application method of an innovative bioproduct on biomineralization
Pereira, Alice S. (author) / Oliveira, Alexandre (author) / Lemos, Paulo C. (author) / Guerra, João P.L. (author) / Candeias, António (author) / Faria, Paulina (author)
2021-06-19
Article (Journal)
Electronic Resource
English
| Springer Verlag | 2016
| British Library Online Contents | 1999
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| Springer Verlag | 2019