Green chitosan: thiourea dioxide cleaning gel for manganese stains on granite and glass substrates
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Título: | Green chitosan: thiourea dioxide cleaning gel for manganese stains on granite and glass substrates |
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Autor/es: | Campos, Bruno | Marco, Alexandra | Cadeco, Guilhermina | Freire-Lista, David M. | Silvestre-Albero, Joaquín | Algarra, Manuel | Vieira, Eduarda | Pintado, Manuela | Moreira, Patrícia R. |
Grupo/s de investigación o GITE: | Materiales Avanzados |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica |
Palabras clave: | Manganese stains | Granite | Glass | Leclanché cells | Green cleaning gel | Chitosan |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | 16-dic-2021 |
Editor: | Springer Nature |
Cita bibliográfica: | Heritage Science. 2021, 9:160. https://doi.org/10.1186/s40494-021-00632-y |
Resumen: | The cleaning or removal of manganese stains on Cultural Heritage has not been much tested or successful so far. The aim of this article was to assess a new green cleaning gel for Mn-rich black-blue stains on different substrates. The black-blue stains were characterized at optical and chemical level through colour-related data, optical microscope, FTIR, XRF and XPS. Mn-stained granite found on historical churches at Vila Real (North of Portugal) and glass jars of Leclanché cells, belonging to the ISEP’s Museum (Portugal) collection, were the ideal case studies to test the efficiency of chitosan: thiourea dioxide (TD) cleaning gel. TD proved to be the best candidate to reduce insoluble manganese oxides, over Hydroxylamine Hydrochloride and Hydroxymethanesulfinic Acid. Cleaning assays performed on stained granite samples collected at a historical quarry and in situ application on stained granite churches allowed removal of the stains to a satisfactory level. Similar results were obtained on stained glass jars. |
Patrocinador/es: | This work was supported by BIO4MURAL–Biotechnology innovative solutions for the removal of pigmentation and preventive conservation of cultural and historically relevant mural painting through FEDER–Operational Program for Competitiveness and Internationalization [Grant Number POCI-01–0145-FEDER-029157] and National Funds from FCT–Foundation for Science and Technology [Grant Number PTDC/HAR-ARQ/29157/2017]; Alexandra Marco PhD research supported by Foundation for Science and Technology (FCT) through POCH–Operational Human Capital Program, co-participated by the Social European Fund (FSE) and MCTES National Fund [Grant Number SFRH/BD/125596/2016]; and FCT through the Strategic Projects CITAR (UID/EAT/0622/2016) and CBQF [Grant Number UID/Multi/50016/2013]. Dr. David M. Freire-Lista is supported by FCT through Stimulus of Scientific Employment, Individual Support 2017 [Grant Number CEECIND/03568/2017]. |
URI: | http://hdl.handle.net/10045/120630 |
ISSN: | 2050-7445 |
DOI: | 10.1186/s40494-021-00632-y |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © The Author(s) 2021. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1186/s40494-021-00632-y |
Aparece en las colecciones: | INV - LMA - Artículos de Revistas |
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