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Preventive Conservation applied to the Mineralogical Collection of the National Museum of Natural History and Science of the University of Lisbon
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Resumo(s)
As coleções de minerais fazem parte do nosso património cultural. Neste trabalho de investigação
foi aplicada uma metodologia de conservação preventiva à Coleção de Mineralogia do Museu
Nacional de História Natural e da Ciência da Universidade de Lisboa (MUHNAC-ULisboa)
(Portugal). A metodologia envolveu a caracterização do edifício, da coleção em reserva e
exposição, a análise da classificação sistemática, a atribuição de características especiais a
minerais, o levantamento do estado de conservação e a determinação das condições ambientais
em ambas as salas.
As classes de minerais mais abundantes representadas na coleção em estudo são os silicatos, os
sulfuretos e sulfossais. A atribuição de características especiais compreende os minerais sensíveis
à luz, sensíveis à humidade relativa, potencialmente tóxicos, amianto e radioativos, sendo que os
minerais sensíveis à luz apresentam a maior percentagem (13,6%) e os minerais de amianto a
menor percentagem (1,1%).
A aplicação do modelo Cultural Property Risk Analysis (CPRAM) permitiu a avaliação de risco para
a coleção, bem como a proposta de estratégias para mitigar os riscos específicos identificados.
Os principais riscos genéricos identificados na reserva são as Forças físicas, Fogo e Humidade
relativa incorreta. Enquanto que na exposição verificou-se que os possíveis maiores riscos estão
relacionados com Forças físicas, Fogo, Poluentes, Luz e Humidade relativa incorreta. Os principais
minerais em risco são os minerais com estruturas de cristais projetados, minerais sensíveis à luz
e pirites/marcassites.
O estudo trata ainda os minerais potencialmente perigosos existentes na coleção de minerais, tais
como os minerais potencialmente tóxicos, amianto e radioativos. Estes minerais foram
identificados, fotografados, etiquetados e encapsulados. Foi realizada também uma avaliação de
risco dos minerais de amianto e radioativos. E, por fim, foram propostos procedimentos de
segurança e saúde para o manuseamento destes minerais.
Mineral collections are part of our cultural heritage. In this work, a preventive conservation methodology was applied to the Mineralogical Collection of the National Museum of Natural History and Science of the University of Lisbon (MUHNAC-ULisboa), (Portugal). The methodology involved the characterization of MUHNAC’s building, mineral collection in storage and exhibition, classification system analysis, attribution of special mineral characteristics, condition survey and determination of environmental conditions in both rooms. Silicates, sulphides and sulfosalts were found to be the most abundant mineral classes represented in the collection. The special mineral characteristics attribution comprises light-sensitive minerals, RH-sensitive minerals, potentially toxic, asbestos, and radioactive. The light-sensitive minerals present the highest percentage (13,6%), while asbestos present the lowest percentage (1,1%). The application of the Cultural Property Risk Analysis (CPRAM) model made it possible to conduct a risk assessment for this collection, as well as to propose mitigation strategies to the specific risks identified. The main generic risks found in storage were Physical forces, Fire, and Incorrect relative humidity. While on display the highest risks are related to Physical forces, Fire, Pollutants, Light, and Incorrect relative humidity. The main mineralogical specimens at risk of being loss are those with projecting crystal structures, light-sensitive minerals and pyrite/marcasite minerals. The study also discusses hazardous specimens in the mineral collection, such as potentially toxic, asbestos, and radioactive. These minerals were identified, photograph, labelled and encapsulated. Risk assessments of asbestos and radioactive minerals were conducted. Health and safety procedures for handling these minerals have been established.
Mineral collections are part of our cultural heritage. In this work, a preventive conservation methodology was applied to the Mineralogical Collection of the National Museum of Natural History and Science of the University of Lisbon (MUHNAC-ULisboa), (Portugal). The methodology involved the characterization of MUHNAC’s building, mineral collection in storage and exhibition, classification system analysis, attribution of special mineral characteristics, condition survey and determination of environmental conditions in both rooms. Silicates, sulphides and sulfosalts were found to be the most abundant mineral classes represented in the collection. The special mineral characteristics attribution comprises light-sensitive minerals, RH-sensitive minerals, potentially toxic, asbestos, and radioactive. The light-sensitive minerals present the highest percentage (13,6%), while asbestos present the lowest percentage (1,1%). The application of the Cultural Property Risk Analysis (CPRAM) model made it possible to conduct a risk assessment for this collection, as well as to propose mitigation strategies to the specific risks identified. The main generic risks found in storage were Physical forces, Fire, and Incorrect relative humidity. While on display the highest risks are related to Physical forces, Fire, Pollutants, Light, and Incorrect relative humidity. The main mineralogical specimens at risk of being loss are those with projecting crystal structures, light-sensitive minerals and pyrite/marcasite minerals. The study also discusses hazardous specimens in the mineral collection, such as potentially toxic, asbestos, and radioactive. These minerals were identified, photograph, labelled and encapsulated. Risk assessments of asbestos and radioactive minerals were conducted. Health and safety procedures for handling these minerals have been established.
Descrição
Palavras-chave
Mineral collection Natural history collections Preventive conservation Risk assessment CPRAM Hazardous mineral specimens