Sorbent removal of air pollutants from museum display cases

The protection of silver collections from tarnishing

“…Tests at the British Museum indicated that an industrial zinc oxide product absorbed hydrogen sulphide rather effectively [11], while activated charcoal did not give satisfactory results in the Winterthur Museum [12]. Comparative laboratory tests indicated that both activated carbon and potassium permanganate (Purafil) showed good results in active as well as passive modes for the removal of hydrogen sulphide [13,14].…”

Comparison of adsorbent materials for acetic acid removal in showcases

“…Another is the removal of the pollutants from inside showcases, because unsuspected sources of pollutants may exist. That removal can be done by means of adsorbent materials, which can be employed in a passive mode (simply putting the adsorbent close to the objects to protect) or in an active mode (forcing the air to pass through the adsorbent) [21,22].…”

Transport and sorption of volatile organic compounds and water vapor in porous media

“…Considering the large time people spend indoors and the elevated indoor concentrations of many VOCs relative to outdoor concentrations, the dominant contribution to the total exposure for many species results from inhalation of indoor air. Although several investigators have begun to explore the use of sorbents such as activated carbon and silica gel to remove various pollutants from indoor air (Parmar and Grosjean, 1991;Weschler et al, 1993;Shaughnessy et al, 1994), to our knowledge, no studies have been conducted to systematically investigate VOC sorption by a broad range of sorbents in conditions appropriate to the indoor environment. Indoor concentrations of total VOCs are normally at the ppm level (Shah and Singh, 1988;Daisey et al, 1994).…”