文物保存微环境中的氮氧化物集成净化  

Integrated purification of low concentration NO_x in microenvironments for cultural relics conservation

作　　者：王大为[1] 修光利[1] 张大年[1] 徐方圆[2] 吴来明[2] 解玉林[2] 

机构地区：[1]华东理工大学国家环境保护化工过程环境风险评价与控制重点室,上海200237 [2]馆藏文物保存环境国家文物局重点科研基地,上海博物馆,上海200050

出　　处：《文物保护与考古科学》2015年第2期58-62,共5页Sciences of Conservation and Archaeology

摘　　要：氮氧化物(NOx)是环境中的重要污染物,是文物保存环境的重大威胁,不仅其本身会对文物产生严重危害,而且与其他污染物如硫氧化物和有机酸耦合会加剧侵蚀。为此,本研究采用光催化预处理与生物质吸附集成技术净化文物保存微环境空气中低浓度的氮氧化物。实验结果表明:直接使用竹屑、杉木屑、落叶松、稻壳和稻糠生物质可去除NOx;在520℃下炭化的竹炭对NOx去除率可达75%。NOx的光催化效率随流速升高而降低,当NOx中混有有机酸时集成净化效率会出现波动。对光催化和吸附的不同组合进行了比较,最优组合可使NO和NO2浓度分别降至1.98μg/m3和1.80μg/m3。Nitrogen oxides （NOx） are important environmental air pollutants that pose a threat for cultural relics. NOx does not only cause enormous damage, but it also enhances the corrosion induced by other pollutants such as sulfur oxides （SOx ） and organic acids. The rate of removal of low concentrations of NOx by the adsorption onto biomass and by photocatalysis was studied. These studies have shown that although the direct use of biomass such a fir sawdust, larch sawdust and bamboo can remove moderate levels of NOx, NOX removal efficiency is increased 75% using bamboo charcoal made by carbonization at 520 C. The photo - oxidation efficiency of NOx decreases with increasing flow rate, and the efficiency of NOx removal changes slightly when organic acids are combined in the inlet stream of NQ. Different combinations of photocatalysts and adsorbents were compared, and the optimal combination reduced the NO and NO2 levels to 1.98 and 1.80μg/m3, respectively.

关 键 词：博物馆 室内空气净化 竹炭 氮氧化物 

分 类 号：G264[历史地理—考古学及博物馆学]