New protective coatings against lampenflora growing in the Pommery Champagne cellar

Phototrophic microorganisms such as cyanobacteria and microalgae can proliferate readily in underground heritage sites where the introduction of artificial illumination equipment has significantly altered previously stable environmental conditions. The extended lampenflora biofilm growth on bas-reliefs carved Pommery Champagne cellar Reims (France) represents a recurring biocolonisation problem which requires periodic cleaning. aim this work was to limit chalk substrates using preventative biocidal treatments based polyoxometalate ionic liquids (POM-ILs). Biocidal assays carried out laboratory showed how two different colourless POM-IL coatings were more effective than commercial Preventol RI80 against algal strains isolated from bas reliefs, Pseudostichococcus monallantoides Chromochloris zofingiensis. However, only one variant capable sustained prevention when applied wet chalk, replicates drastic natural conditions performance coatings. Crucially, coating concentration studies demonstrate POM-IL-coated slabs previous experiments retain their activity prevent subsequent recolonisation following re-inoculation coated with algae cyanobacteria. Consequently, POM-ILs represent excellent candidates eliminate unique subterranean environment cellar.