Low-NO-like Oxidation Pathway Makes a Significant Contribution to Secondary Organic Aerosol in Polluted Urban Air

气溶胶 环境化学 化学 硫酸盐 硝酸盐 臭氧 化学电离 氮氧化物 污染物 化学成分 电离 有机化学 离子 燃烧
作者
Chenshuo Ye,Ying Liu,Bin Yuan,Zelong Wang,Yi Lin,Weiwei Hu,Wei Chen,Tiange Li,Wei Song,Xinming Wang,Daqi Lv,Dasa Gu,Min Shao
出处
期刊:Environmental Science & Technology [American Chemical Society]
卷期号:57 (37): 13912-13924 被引量:8
标识
DOI:10.1021/acs.est.3c01055
摘要

Anthropogenic pollutants can greatly mediate formation pathways and chemical compositions of secondary organic aerosol (SOA) in urban atmospheres. We investigated the molecular tracers for different types of SOA in PM2.5 under varying NO/NO2 conditions in Guangzhou using source analysis of particle-phase speciated organics obtained from an iodide chemical ionization mass spectrometer with a Filter Inlet for Gases and AEROsols (FIGAERO-I-CIMS). Results show that low-NO-like pathways (when NO/NO2 < 0.2) explained ∼75% of the total measured FIGAERO-OA during regional transport periods, which was enriched in more-oxidized C4–C6 non-nitrogenous compounds over ozone accumulation. Daytime high-NO chemistry played larger roles (38%) in local pollution episodes, with organic nitrates (ONs) and nitrophenols increasing with enhanced aerosol water content and nitrate fraction. Nighttime NO3-initiated oxidation, characterized by monoterpene-derived ONs, accounted for comparable percentages (10–12%) of FIGAERO-OA for both two periods. Furthermore, the presence of organosulfates (OSs) improves the understanding of the roles of aqueous-phase processes in SOA production. Carbonyl-derived OSs exhibited a preferential formation under conditions of high aerosol acidity and/or abundant sulfate, which correlated well with low-NO-like SOA. Our results demonstrate the importance of NO/NO2 ratios in controlling SOA compositions, as well as interactions between water content, aerosol acidity, and inorganic salts in gas-to-particle partitioning of condensable organics.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
1秒前
科目三应助zzl采纳,获得10
2秒前
3秒前
冬枣枣完成签到,获得积分10
5秒前
李健的粉丝团团长应助11采纳,获得10
5秒前
6秒前
英姑应助mgg采纳,获得10
7秒前
咎谷槐发布了新的文献求助10
7秒前
陶醉水云发布了新的文献求助10
9秒前
daxia9527完成签到,获得积分10
11秒前
我是老大应助tanjuan采纳,获得10
12秒前
逗号发布了新的文献求助10
13秒前
迟大猫应助辉hui采纳,获得10
15秒前
Yolo完成签到,获得积分10
17秒前
咎谷槐完成签到,获得积分20
17秒前
T拐拐发布了新的文献求助20
17秒前
高灿完成签到 ,获得积分10
18秒前
haixuWang完成签到,获得积分10
19秒前
20秒前
刘荻萩应助科研通管家采纳,获得10
22秒前
科研通AI5应助科研通管家采纳,获得10
22秒前
22秒前
Owen应助科研通管家采纳,获得10
22秒前
无花果应助科研通管家采纳,获得10
22秒前
22秒前
脑洞疼应助科研通管家采纳,获得10
22秒前
科研通AI5应助科研通管家采纳,获得10
22秒前
英姑应助科研通管家采纳,获得10
22秒前
科研通AI5应助科研通管家采纳,获得30
22秒前
tanjuan发布了新的文献求助10
25秒前
小马甲应助幸福大白采纳,获得10
26秒前
科研通AI5应助幸福大白采纳,获得10
26秒前
科研通AI5应助幸福大白采纳,获得10
26秒前
26秒前
senli2018发布了新的文献求助10
27秒前
科研通AI5应助下点皮皮肠采纳,获得10
30秒前
Hahahahahahah发布了新的文献求助10
31秒前
科研通AI5应助ShiYanYang采纳,获得10
31秒前
T拐拐完成签到,获得积分20
31秒前
高分求助中
Continuum Thermodynamics and Material Modelling 3000
Production Logging: Theoretical and Interpretive Elements 2700
Les Mantodea de Guyane Insecta, Polyneoptera 1000
Structural Load Modelling and Combination for Performance and Safety Evaluation 1000
Conference Record, IAS Annual Meeting 1977 820
England and the Discovery of America, 1481-1620 600
電気学会論文誌D(産業応用部門誌), 141 巻, 11 号 510
热门求助领域 (近24小时)
化学 材料科学 生物 医学 工程类 有机化学 生物化学 物理 纳米技术 计算机科学 内科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 量子力学 光电子学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3572474
求助须知:如何正确求助?哪些是违规求助? 3142633
关于积分的说明 9448405
捐赠科研通 2844063
什么是DOI,文献DOI怎么找? 1563169
邀请新用户注册赠送积分活动 731661
科研通“疑难数据库(出版商)”最低求助积分说明 718667