ABSTRACT Adsorbent materials can be used for the removal of organic acids from air in storage rooms with heritage collections. The organic acid removal efficiency of two commercially available activated carbon air-filters were tested in situ in two unoccupied stores with densely packed collections. One filter was designed for outdoor type pollutants (Filter A), while the other was designed for organic acids in indoor air (Filter B). Furthermore, the acetic acid removal efficiency of a desiccant silica gel rotor used for dehumidification was measured in a laboratory at different relative humidity levels. Finally, passive removal of acetic acid by silica gel and unfired clay brick were tested in a chamber, and for clay brick at room level as well. Filter B had the highest removal efficiency. The removal efficiency of both filter types depended on the airflow and the filter performance varied considerably in situ from the values reported from standard laboratory tests. Increasing the filter airflow reduced the removal efficiency from 77% and down to 7% for Filter A, and from 92% to 24% for Filter B. There was almost no effect of active air filtration on the concentration of organic acids when this was measured in the middle and in the corner of the storage rooms away from the ventilation inlets. The desiccant dehumidifier removed 98–100% of the acetic acid from the air, independently of the relative humidity. The desiccant rotor will, however, only be running when there is a need for dehumidification and as a result will only periodically remove pollutants. The high acid removal efficiency by dry silica gel was furthermore demonstrated in a chamber test. A clay brick wall in a test room established a concentration gradient across the room and reduced the concentration of organic acids by 56% compared to close to the emission source.

中文翻译：

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用主动和被动吸附技术去除博物馆储藏室室内空气中的有机酸

摘要 吸附材料可用于去除具有文物收藏品的储藏室空气中的有机酸。两种市售活性炭空气过滤器的有机酸去除效率在两个空置的商店中进行了原位测试，这些商店拥有密集的收藏。一个过滤器设计用于室外污染物（过滤器 A），而另一个过滤器设计用于室内空气中的有机酸（过滤器 B）。此外，用于除湿的干燥剂硅胶转子的醋酸去除效率在实验室中在不同的相对湿度水平下进行了测量。最后，在室内测试了硅胶和未烧制粘土砖对醋酸的被动去除，以及在室内水平的粘土砖。过滤器 B 的去除效率最高。两种过滤器类型的去除效率取决于气流，过滤器性能与标准实验室测试报告的值有很大差异。增加过滤器气流使过滤器 A 的去除效率从 77% 降低到 7%，过滤器 B 的去除效率从 92% 降低到 24%。 测量时，主动空气过滤对有机酸浓度几乎没有影响在远离通风口的储藏室中间和角落。干燥剂除湿机从空气中去除了 98-100% 的醋酸，与相对湿度无关。然而，干燥剂转子只会在需要除湿时运行，因此只会定期去除污染物。在室内试验中进一步证明了干硅胶的高酸去除效率。测试室中的粘土砖墙在整个房间内建立了浓度梯度，与靠近排放源的地方相比，有机酸的浓度降低了 56%。