Mostra el registre d'ítem simple
Ammonium monoethyloxalate (AmEtOx): a new agent for the conservation of carbonate stone substrates
dc.contributor.author | Gimeno Torrente, Domingo |
dc.contributor.author | Vallcorba, Oriol |
dc.contributor.author | Navarro Ezquerra, Antonia |
dc.contributor.author | Aragoni, M. Carla |
dc.contributor.author | Giacopetti, Laura |
dc.contributor.author | Arca, Massimiliano |
dc.contributor.author | Carcangiu, Gianfranco |
dc.contributor.author | Columbu, Stefano |
dc.contributor.author | Isaia, Francesco |
dc.contributor.author | Lippolis, Vito |
dc.contributor.author | Meloni, Paola |
dc.contributor.author | Podda, Enrico |
dc.contributor.author | Rius Palleiro, Jordi |
dc.contributor.author | Pintus, Anna |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Tecnologia de l'Arquitectura |
dc.date.accessioned | 2021-02-18T12:30:44Z |
dc.date.available | 2021-02-18T12:30:44Z |
dc.date.issued | 2021 |
dc.identifier.citation | Gimeno, D. [et al.]. Ammonium monoethyloxalate (AmEtOx): a new agent for the conservation of carbonate stone substrates. "New journal of chemistry", 2021, |
dc.identifier.issn | 1144-0546 |
dc.identifier.uri | http://hdl.handle.net/2117/340096 |
dc.description.abstract | The ammonium salt of monoethyloxalate (AmEtOx) was investigated as a novel precursor for the conservation of carbonate stone substrates, such as biomicritic limestone and marble. Full characterization of treated and untreated authentic stone samples was carried out by means of SEM, X-ray powder diffraction, synchrotron tts-µXRD measurements, mercury intrusion porosimetry, determination of water transport properties, and pull-off tests. The improved solubility (1.49 M, 20.1% w/w) of AmEtOx as compared to that of ammonium oxalate (AmOx; 0.4 M, 5% w/w) results in the formation of microcrystalline phases 30–50 and 200–500 µm thick of calcium oxalate mono-(whewellite) or dihydrate (weddellite), on marble and biomicrite samples, respectively, after treatment with AmEtOx 5% and 12% w/w aqueous solutions. As a result, a reduction in the porosity of the stone samples and an enhancement of their cohesion are observed. DFT calculations, carried out to investigate the hydrolysis reaction leading from AmEtOx to AmOx, showed that the localization of the Lowest Unoccupied Molecular Orbital (LUMO) and the natural charge distribution account nicely for the tendency to hydrolyse observed experimentally, eventually leading to the formation of whewellite and weddellite on the stone surface. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Arquitectura::Restauració arquitectònica |
dc.subject.lcsh | Building stones |
dc.subject.lcsh | Metamorphic rocks |
dc.subject.lcsh | X-rays - Diffraction |
dc.title | Ammonium monoethyloxalate (AmEtOx): a new agent for the conservation of carbonate stone substrates |
dc.type | Article |
dc.subject.lemac | Pedres de construcció |
dc.subject.lemac | Roques metamòrfiques |
dc.subject.lemac | Raigs X -- Difracció |
dc.contributor.group | Universitat Politècnica de Catalunya. GICITED - Grup Interdiciplinari de Ciència i Tecnologia en l'Edificació |
dc.identifier.doi | 10.1039/D0NJ06001A |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | https://pubs.rsc.org/en/Content/ArticleLanding/2021/NJ/D0NJ06001A#!divAbstract |
dc.rights.access | Open Access |
local.identifier.drac | 30467243 |
dc.description.version | Preprint |
local.citation.author | Gimeno, D.; Vallcorba, O.; Navarro Ezquerra, A.; Aragoni, M.; Giacopetti, L.; Arca, M.; Carcangiu, G.; Columbu, S.; Isaia, F.; Lippolis, V.; Meloni, P.; Podda, E.; Rius, J.; Pintus, A. |
local.citation.publicationName | New journal of chemistry |
Fitxers d'aquest items
Aquest ítem apareix a les col·leccions següents
-
Articles de revista [190]
-
Articles de revista [556]