Effects of surface type and relative humidity on the production and concentration of nitrous acid in a model indoor environment
Effects of surface type and relative humidity on the production and concentration of nitrous acid in a model indoor environment
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DOI：
10.1021/es000879i
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发表时间：
2001-06-01
影响因子：
11.4
通讯作者：
Zhang, JF
中科院分区：
文献类型：
--
作者：
Wainman, T;Weschler, CJ;Zhang, JF
一个嵌套的腔室设计的目的是研究影响室内空气化学的参数。在该系统中进行了实验，研究了三种表面类型（聚四氟乙烯，壁纸，地毯）和两个水平的相对湿度（50%和70%RH）的二氧化氮（NO2）通过与吸附的水蒸气的非均相反应的气相亚硝酸（HONO）的形成的影响。这项调查的结果表明，与聚四氟乙烯表面相比，合成纤维制成的地毯增加了NO2表面去除率近一个数量级，并导致更高的峰值HONO浓度。结果还表明，表面吸附水的能力将决定在NO：！源已经关闭，NO2和吸附水之间的非均相反应不再显著。发现乙烯基涂覆的壁纸在50%和70%RH下关闭NO2源后长时间释放HONO，而发现特氟龙仅在70%RH下释放HONO。这项调查的结果也证明了实用的嵌套室设计在调查室内空气化学。
A nested chamber design was constructed for the purpose of studying parameters that affect indoor air chemistry. Experiments were conducted in this system to investigate the effects of three surface types (Teflon, wallpaper, and carpet) and two levels of relative humidity (50% and 70% RH) on the formation of gas-phase nitrous acid (HONO) through the heterogeneous reaction of nitrogen dioxide (NO2) with sorbed water vapor. The results of this investigation show that, compared with Teflon surfaces, carpet made of synthetic fibers increased the NO2 surface removal rate by nearly an order of magnitude and resulted in higher peak HONO concentrations. The results also suggest that the capacity of a surface to sorb water will determine if HONO is released from that surface after the NO:! source has been turned off and the heterogeneous reaction between NO2 and sorbed water is no longer significant. Vinyl-coated wallpaper was found to release HONO for prolonged periods of time after the NO2 source was turned off at both 50% and 70% RH whereas Teflon was found to do so only at 70% RH. The results of this investigation also demonstrate the utility of the nested chamber design in investigating indoor air chemistry.