Uptake of air pollutants by paper

Citation
A. Johansson et al., Uptake of air pollutants by paper, RESTAURATOR, 21(3), 2000, pp. 117-137
Citations number
36
Categorie Soggetti
Library & Information Science
Journal title
RESTAURATOR-INTERNATIONAL JOURNAL FOR THE PRESERVATION OF LIBRARY AND ARCHIVAL MATERIAL
ISSN journal
00345806 → ACNP
Volume
21
Issue
3
Year of publication
2000
Pages
117 - 137
Database
ISI
SICI code
0034-5806(2000)21:3<117:UOAPBP>2.0.ZU;2-L
Abstract
The objectives of the study have been to investigate the uptake of air poll utants (SO2, NO2 and O-3), especially synergistic effects when these pollut ants are present together, and the effects of climate. The initial dry deposition of the pollutants onto a paper surface was studi ed using on-line gas analysis. The paper samples were exposed to synthetic atmospheres with careful control of pollutant concentrations, relative humi dity and now conditions. The depositions of NO2 and O-2 were judged to be insignificant in the prese nt study. The investigated papers showed a low tendency to pick up SO2 alon e. The deposition of SO2 was however enhanced by the presence of the other pollutants, and also by a high relative humidity. The addition of NO2 incre ased the pick-up of SO2 at high relative humidities, while the addition of O-3 also increased the pick-up of SO2 at intermediate humidities. The presence of CaCO3 favoured a high pick-up of SO2 on the alkaline papers However, ii was found that the alkaline papers responded differently to SO 2. This may indicate that the alkali reserve under adverse conditions is ei ther too rapidly consumed or passivated, probably due to the paper manufact uring process and the origin of the filler.