Homogeneous and heterogeneous photolysis of nitrate in the atmosphere:state of the science,current research needs,and future prospects  

作　　者：Yiqun Cao Qingxin Ma Biwu Chu Hong He 

机构地区：[1]State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [2]College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China [3]Center for Excellence in Regional Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China

出　　处：《Frontiers of Environmental Science & Engineering》2023年第4期109-126,共18页环境科学与工程前沿（英文）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.22188102 and 21922610);The authors appreciate the Ozone Formation Mechanism and Control Strategies Project of the Research Center for Eco-Environmental Sciences,CAS(China)(No.RCEES-CYZX-2020);the Cultivating Project of Strategic Priority Research Program of Chinese Academy of Sciences(China)(No.XDPB1901);the Young Talent Project of the Center for Excellence in Regional Atmospheric Environment,CAS(China)(No.CERAE201801).

摘　　要：Nitrate is an important component of atmospheric particulate matter and affects air quality,climate,human health,and the ecosystem.Nitrate was previously considered a permanent sink for nitrogen oxides(NO_(x)).However,this viewpoint has been challenged in recent years because growing research evidence has shown the transformation of nitrate into NO_(x)(i.e.,renoxification).The photolysis of nitrate/HNO3,especially in the particulate phase or adsorbed on particles,can be a significant renoxification process in the atmosphere.The formation and photolysis of nitrate in aerosol not only change the diurnal variation of NO_(x),but also provide long-distance transport of NO_(x)in the form of nitrate,which affects local and regional atmospheric chemistry and air quality.This review summarizes recent advances in the fundamental understanding of the photolysis of nitrate/HNO3 under various atmospheric conditions,with a focus on mechanisms and key factors affecting the process.The atmospheric implications are discussed and future research is recommended.

关 键 词：NITRATE PHOTOLYSIS Renoxification AEROSOL 

分 类 号：O62[理学—有机化学]