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As a typical photochemical product, atmospheric peroxyacetyl nitrate (PAN), which has received widespread attention for the important role it plays in atmospheric photochemical processes, has been studied relatively late due to difficulties in monitoring. In order to deeply investigate the concentration level of PAN and its generation mechanism in industrial cities, this study conducted online observations of PAN and other pollutants for one year from March 2023 to February 2024 in Zibo City, North China Plain. The average concentration of PAN during the study period was 1.09×10^-9 (0.03~10.07×10^-9), and the four-seasonal concentration ranking showed a pattern of winter (2.07×10^-9) > autumn (0.98×10^-9) > spring (0.64×10^-9) > summer (0.61×10^-9). There was a significant difference in the time of occurrence of the peak daily change concentration, with the peak occurring at midday (12:00) in summer and delayed to the afternoon (17:00) in winter. The results of the generalised additive model (GAM) showed that the PAN concentration was significantly affected by temperature and atmospheric oxidability. Calculations based on the zero-dimensional box model (F0AM) showed that acetaldehyde contributed the most to peroxyacetyl (PA) (69%), followed by photolysis (18%) and oxidation (11%) of methylglyoxal, and that the loss of PA was dominated by the interaction of nitric oxide (NO) (18%) and nitrogen dioxide (NO₂) (81%) with PA. The relative incremental reactivity (RIR) showed that PAN generation was sensitive to NO_x. This study enriches the understanding of the characteristics of atmospheric PAN pollution and its formation mechanism in North China and provides scientific and technological support for air pollution control.

, authors=Hao-chen CAI^{1, 2}, Ze QIN¹, Yan-hui LIU¹, Bo XU³, Wen-yu BAI^{1, *}, Xiao-li WANG², Chun-mei GENG^{1, *}, Wen YANG¹, authorsList=Hao-chen CAI, Ze QIN, Yan-hui LIU, Bo XU, Wen-yu BAI, Xiao-li WANG, Chun-mei GENG, Wen YANG, authorCompany=null, correspAuthors=Wen-yu BAI, Chun-mei GENG, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314917708701987526, articleId=1314917708106396356, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=淄博市大气中过氧乙酰硝酸酯（PAN）污染特征与生成机制, columnId=1234106388364981004, journalTitle=中国环境科学, columnName=大气污染与控制, runingTitle=null, highlight=null, articleAbstract=

为深入探究工业城市过氧乙酰硝酸酯（PAN）的浓度水平及其生成机制，本研究于2023年3月至2024年2月在华北平原淄博市对PAN及其他污染物进行了为期一年的在线观测．研究期间PAN的平均浓度为1.09×10^-9（0.03~10.07×10^-9），四季浓度排序呈现出冬季（2.07×10^-9）>秋季（0.98×10^-9）>春季（0.64×10^-9）>夏季（0.61×10^-9）的规律．日变化浓度峰值出现时间存在明显的差异，夏季峰值出现在中午时段（12：00），而冬季则推迟到下午时段（17：00）．广义相加模型（GAM）结果表明，PAN浓度受温度和大气氧化性影响显著．基于零维盒子模型（F0AM）计算结果表明，乙醛对过氧乙酰基（PA）的贡献最大（69%），其次是甲基乙二醛的光解（18%）和氧化（11%），PA的损失主要以一氧化氮（NO）（18%）和二氧化氮（NO₂）（81%）与PA的相互作用为主；相对增量反应性（RIR）表明PAN的生成对NO_x更敏感．该研究丰富了华北平原地区大气PAN污染特征及生成机制的认识，为大气污染管控提供了科技支撑．

, authors=蔡浩晨^{1, 2}, 覃泽¹, 刘妍慧¹, 徐勃³, 白雯宇^{1, *}, 王晓丽², 耿春梅^{1, *}, 杨文¹, authorsList=蔡浩晨, 覃泽, 刘妍慧, 徐勃, 白雯宇, 王晓丽, 耿春梅, 杨文, authorCompany=null, correspAuthors=白雯宇, 耿春梅, authorNote=, correspAuthorsNote=, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=VYp5X2Sidkcv2mkbsIgv/g==, magXml=ZbHkdqLxJOgdzY2rxNEFBA==, pdfUrl=null, pdf=TowbMhioW39t7/bP0onnEw==, pdfFileSize=1757015, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=q9pFSl0ij5J3Puln98p38Q==, mapNumber=null, fund=null)}, authors=[Author(id=1314917709205304017, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917708106396356, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=17732561325@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1314917709297578708, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1314917708106396356, authorId=1314917709205304017, language=EN, stringName=Hao-chen CAI, firstName=Hao-chen, middleName=null, lastName=CAI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=^{1, 2}, address=^1.Environmental Testing and Experiment Centre, China Academy of Environmental Sciences, Beijing 100012, China
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蔡浩晨（2000-），男，河北滦州人，硕士研究生，主要研究方向为大气光化学污染．发表论文1篇．17732561325@163.com.

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蔡浩晨（2000-），男，河北滦州人，硕士研究生，主要研究方向为大气光化学污染．发表论文1篇．17732561325@163.com.

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