Heterogeneous reaction of NO_(2) with feldspar, three clay minerals and Arizona Test Dust  

作　　者：Mingjin Tang Xiaohong Jia Lanxiadi Chen Wenjun Gu Chengpeng Huang FuWang Lan Luo Hongli Wang Xinming Wang Chao Peng 

机构地区：[1]State Key Laboratory of Organic Geochemistry,Guangdong Key Laboratory of Environmental Protection and Resources Utilization,and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China [2]CAS Center for Excellence in Deep Earth Science,Guangzhou 510640,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Longhua Center for Disease Control and Prevention of Shenzhen,Shenzhen 518109,China [5]State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex,Shanghai Academy of Environmental Sciences,Shanghai 200233,China

出　　处：《Journal of Environmental Sciences》2023年第8期65-74,共10页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.42022050);Guangdong Foundation for Program of Science and Technology Research(Nos.2019B121205006 and 2020B1212060053);the Guangdong Science and Technology Department(No.2017GC010501);CAS Pioneer Hundred Talents program.

摘　　要：Heterogeneous reaction of NO_(2) with mineral dust aerosol may play important roles in troposphere chemistry,and has been investigated by a number of laboratory studies.However,the influence of mineralogy on this reaction has not been well understood,and its impact on aerosol hygroscopicity is not yet clear.This work investigated heterogeneous reactions of NO_(2)(∼10 ppmv)with K-feldspar,illite,kaolinite,montmorillonite and Arizona Test Dust(ATD)at room temperature as a function of relative humidity(<1%to 80%)and reaction time(up to 24 hr).Heterogeneous reactivity towards NO_(2) was low for illite,kaolinite,montmorillonite and ATD,and uptake coefficients of NO_(2),γ(NO_(2)),were determined to be around or smaller than 1×10^(−8);K-feldspar exhibited higher reactivity towards NO_(2),and CaCO_(3) is most reactive among the nine mineral dust samples considered in this and previous work.After heterogeneous reaction with NO_(2) for 24 hr,increase in hygroscopicity was nearly insignificant for illite,kaolinite and montmorillonite,and small but significant for K-feldspar;in addition,large increase in hygroscopicity was observed for ATD,although the increase in hygroscopicity was still smaller than CaCO_(3).

关 键 词：Mineral dust Heterogeneous reaction HYGROSCOPICITY MINERALOGY Nitrogen oxides NITRATE 

分 类 号：X513[环境科学与工程—环境工程] P402[天文地球—大气物理学与大气环境]