The effect of particulate matter on paper degradation
Tóm tắt
In this work we explore the chemical effects of particulate matter on paper. We exposed paper made of pure cellulose to the environment in different locations in central London, outdoors (in sheltered conditions) and indoors, for a period of up to 6 months. We monitored particulate matter (PM) deposition by counting the particles deposited every month with a scanning electron microscope. We analysed elemental composition of the deposited particles using inductively coupled plasma mass spectrometry. After accelerated degradation of the exposed samples, we determined the degree of polymerisation using viscometry. We observed higher deposition rates and higher metal concentration outdoors than indoors. Elemental analysis of the deposited particles revealed the presence of some transition metals (Fe, Cu, Cr) that can contribute to the degradation of cellulose fibres through the Fenton reaction. By comparing the degree of polymerisation of protected, unprotected and unexposed samples we could determine the relative contribution of PM deposition on the increase of the degradation rate. We found that the surface concentration of iron correlates with the reduction in the degree of polymerisation of the exposed paper. The results suggest that the presence of Fenton metals in PM has a significant effect on the acceleration of the degradation of cellulose. However, we estimate that this will unlikely occur at the levels of area coverage by PM that are typically avoided in indoor heritage through preventive maintenance and cleaning.
Tài liệu tham khảo
Rodriguez-Navarro C, Sebastian E. Role of particulate matter from vehicle exhaust on porous building stones (limestone) sulfation. Sci Total Environ. 1996;187(2):79–91. doi:10.1016/0048-9697(96)05124-8.
Simão J, Ruiz-Agudo E, Rodriguez-Navarro C. Effects of particulate matter from gasoline and diesel vehicle exhaust emissions on silicate stones sulfation. Atmos Environ. 2006;40(36):6905–17. doi:10.1016/j.atmosenv.2006.06.016.
Strandberg H. Reactions of copper patina compounds—i. Influence of some air pollutants. Atmos Environ. 1998;32(20):3511–20. doi:10.1016/S1352-2310(98)00057-0.
Ligocki MP, Salmon LG, Fall T, Jones MC, Nazaroff WW, Cass GR. Characteristics of airborne particles inside southern California museums. Atmos Environ. 1993;27(5):697–711. doi:10.1016/0960-1686(93)90188-5.
Bellan LM, Salmon LG, Cass GR. A Study on the human ability to detect soot deposition onto works of art. Environ Sci Technol. 2000;34(10):1946–52. doi:10.1021/es990769f.
Frame K. Creative conservation risk management: evolving a collection risk management strategy at a major heritage attraction. Collections. 2013;9(1):103–14.
Bartl B, Mašková L, Paulusová H, Smolık J, Bartlová L, Vodička P. The effect of dust particles on cellulose degradation. Stud Conserv. 2015. doi:10.1179/2047058414Y.0000000158.
Camuffo D, Brimblecombe P, Van Grieken R, Busse HJ, Sturaro G, Valentino A, Bernardi A, Blades N, Shooter D, De Bock L, Gysels K, Wieser M, Kim O. Indoor air quality at the Correr Museum, Venice, Italy. Sci Total Environ. 1999;236(1–3):135–52.
Šelih VS, Strlič M, Kolar J, Pihlar B. The role of transition metals in oxidative degradation of cellulose. Polym Degrad Stab. 2007;92(8):1476–81. doi:10.1016/j.polymdegradstab.2007.05.006.
Fenton HJH. Oxidation of tartaric acid in presence of iron. J Chem Soc Trans. 1894;65:899–910. doi:10.1039/CT8946500899.
Strlic M, Cigic IK, Mozir A, Thickett D, de Bruin G, Kolar J, Cassar M. Test for compatibility with organic heritage materials—a proposed procedure. e-Preserv Sci. 2010;7:78–86.
Curran K, Možir A, Underhill M, Gibson LT, Fearn T, Strlič M. Cross-infection effect of polymers of historic and heritage significance on the degradation of a cellulose reference test material. Polym Degrad Stab. 2014;107:294–306. doi:10.1016/j.polymdegradstab.2013.12.019.
Mattimaricq M. Chemical characterization of particulate emissions from diesel engines: a review. J Aerosol Sci. 2007;38(11):1079–118. doi:10.1016/j.jaerosci.2007.08.001.
Sarvi A, Lyyränen J, Jokiniemi J, Zevenhoven R. Particulate emissions from large-scale medium-speed diesel engines: 2. Chemical composition. Fuel Process Technol. 2011;92(10):2116–22. doi:10.1016/j.fuproc.2011.06.021.
Taylor, H.E.: Inductively coupled plasma-mass spectrometry. San Diego: Academic Press; 2001. doi:10.1016/B978-012683865-7/50000-4.
Evans R, Wallis AFA. Cellulose molecular weights determined by viscometry. J Appl Polym Sci. 1989;37(8):2331–40. doi:10.1002/app.1989.070370822.
Harrison RM, Tilling R, Romero MSC, Harrad S, Jarvis K. A study of trace metals and polycyclic aromatic hydrocarbons in the roadside environment. Atmos Environ. 2003;37(17):2391–402. doi:10.1016/S1352-2310(03)00122-5.
Janssen NAH, Mansom DFMV, Jagt KVD, Harssema H, Hoek G. Mass concentration and elemental composition of airborne particulate matter at street and background locations. Atmos Environ. 1997;31(8):1185–93. doi:10.1016/S1352-2310(96)00291-9.
Sharma M, Agarwal AK, Bharathi KVL. Characterization of exhaust particulates from diesel engine. Atmos Environ. 2005;39(17):3023–8. doi:10.1016/j.atmosenv.2004.12.047.
Kleeman MJ, Schauer JJ, Cass GR. Size and composition distribution of fine particulate matter emitted from motor vehicles. Environ Sci Technol. 2000;34(7):1132–42. doi:10.1021/es981276y.
Wahlström J, Olander L, Olofsson U. Size, shape, and elemental composition of airborne wear particles from disc brake materials. Tribol Lett. 2009;38(1):15–24. doi:10.1007/s11249-009-9564-x.
Nieuwenhuijsen MJ, Gómez-Perales JE, Colvile RN. Levels of particulate air pollution, its elemental composition, determinants and health effects in metro systems. Atmos Environ. 2007;41(37):7995–8006. doi:10.1016/j.atmosenv.2007.08.002.