Measurement of heterogeneous uptake of NO2 on inorganic particles, sea water and urban grime

作     者：Chuan Yu Zhe Wang Qingxin Ma Likun Xue Christian George Tao Wang Chuan Yu;Zhe Wang;Qingxin Ma;Likun Xue;Christian George;Tao Wang

作者机构：Environment Research InstituteShandong UniversityQingdao 266237China Department of Civil and Environmental EngineeringThe Hong Kong Polytechnic UniversityHong Kong 999077China Division of Environment and SustainabilityThe Hong Kong University of Science and TechnologyHong Kong 999077China Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Univ LyonUniversitéClaude Bernard Lyon 1Centre National de la Recherche Scientifique(CNRS)Institut de Recherches sur la Catalyse et l’Environnement de Lyon(IRCELYON)Villeurbanne F-69626France 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2021年第33卷第8期

页      面：124-135页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：supported by the French National Research Agency/Research Grants Council of Hong Kong Special Administrative Region,China(ANR/RGC)Joint Research Scheme(project A-PolyU502/16-SEAM) National Natural Science Foundation of China(Nos.91744204,91844301) the Research Grants Council of Hong Kong Special Administrative Region,China(Nos.T24/504/17,15265516,C5022-14G) 

主　　题：NO2 uptake HONO source Heterogeneous uptake coefficient Urban grime 

摘      要：Heterogeneous reactions of NO2 on different surfaces play an important role in atmospheric NOxremoval and HONO formation,having profound impacts on photochemistry in polluted urban *** studies have suggested that the NO2 uptake on the ground or aerosol surfaces could be a dominant source for elevated HONO during the ***,the uptake behavior of NO2 varies with different surfaces,and different uptake coefficients were used or derived in different *** obtain a more holistic picture of heterogeneous NO2 uptake on different surfaces,a series of laboratory experiments using different flow tube reactors was conducted,and the NO2 uptake coefficients(γ)were determined on inorganic particles,sea water and urban *** results showed that heterogeneous reactions on those surfaces were generally weak in dark conditions,with the measuredγvaried from10-8 to 3.2×10-7 under different humidity.A photo-enhanced uptake of NO2 on urban grime was observed,with the obvious formation of HONO and NO from the heterogeneous *** photo-enhancedγwas measured to be 1.9×10-6 at 5%relative humidity(RH)and 5.8×10-6 at 70%RH on urban grime,showing a positive RH dependence for both NO2 uptake and HONO *** results demonstrate an important role of urban grime in the daytime NO2-to-HONO conversion,and could be helpful to explain the unknown daytime HONO source in the polluted urban area.