不同环境条件下室内外气相亚硝酸的评估及影响因素。
Evaluation and impact factors of indoor and outdoor gas-phase nitrous acid under different environmental conditions.
机构信息
State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
出版信息
J Environ Sci (China). 2020 Sep;95:165-171. doi: 10.1016/j.jes.2020.03.048. Epub 2020 May 4.
As an important indoor pollutant, nitrous acid (HONO) can contribute to the concentration of indoor OH radicals by photolysis via sunlight penetrating into indoor environments, thus affecting the indoor oxidizing capability. In order to investigate the concentration of indoor HONO and its impact factors, three different indoor environments and two different locations in urban and suburban areas were selected to monitor indoor and outdoor pollutants simultaneously, including HONO, NO, NO, nitrogen oxides (NO), O, and particle mass concentration. In general, the concentration of indoor HONO was higher than that outdoors. In the urban area, indoor HONO with high average concentration (7.10 ppbV) was well-correlated with the temperature. In the suburban area, the concentration of indoor HONO was only about 1-2 ppbV, and had a good correlation with indoor relative humidity. It was mainly attributed to the heterogeneous reaction of NO on indoor surfaces. The sunlight penetrating into indoor environments from outside had a great influence on the concentration of indoor HONO, leading to a concentration of indoor HONO close to that outdoors.
作为一种重要的室内污染物，亚硝（HONO）可以通过阳光穿透进入室内环境进行光解，从而增加室内 OH 自由基的浓度，进而影响室内的氧化能力。为了研究室内 HONO 的浓度及其影响因素，选择了三种不同的室内环境和城市与郊区的两个不同地点，同时监测室内和室外污染物，包括 HONO、NO、NO、氮氧化物（NO）、O 和颗粒质量浓度。一般来说，室内 HONO 的浓度高于室外。在城市地区，具有较高平均浓度（7.10 ppbV）的室内 HONO 与温度密切相关。在郊区，室内 HONO 的浓度仅约为 1-2 ppbV，与室内相对湿度有很好的相关性。这主要归因于 NO 在室内表面的非均相反应。阳光从室外穿透进入室内环境对室内 HONO 的浓度有很大影响，导致室内 HONO 的浓度接近室外水平。
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