Field and laboratory studies of aerosol formation from halogenated precursor gases

卤化前体气体形成气溶胶的现场和实验室研究

• 批准号: 193265552
• 负责人: Professor Dr. Andreas B. Held
• 金额: --
• 依托单位: Fachgebiet Umweltchemie und Luftreinhaltung
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/193265552?language=en
• 关键词: Field; laboratory; studies; aerosol; formation

This project investigates secondary aerosol formation from halogenated precursor gases and its impact on halogen chemistry in the troposphere both in field and laboratory studies. Embedded into the HaloProc research unit which aims at understanding the reaction mechanisms prevailing in natural halogenation processes, the main objective is an improved understanding of iodine-initiated new particle formation. Nucleation of aerosol particles from reactive iodine species has previously been observed in coastal environments with biogenic sources of organic iodine compounds. Here, we propose to study new particle formation events in salt lake environments that may be dominated by inorganic sources of reactive iodine compounds. The temporal evolution of submicron particle size distributions will be measured, and aerosol filter samples will be collected for subsequent chemical analysis. Supplementary laboratory experiments designed to simulate the atmospheric conditions encountered at the field sites, and equipped with more sophisticated analytical methods, will help to identify the relevant iodine species and the key reaction mechanisms for iodine-initiated new particle formation. From the combination of field and laboratory work, an extensive set of experimental data is expected that will be made available to the modeling community in order to gain deeper insight into the implications of iodine nucleation on halogen chemistry in the troposphere. Thus, the proposed research agenda is designed to bridge the gap between field experiments, laboratory studies and modeling work, and contribute to the overarching objectives of the HaloProc research unit.

本项目在实地和实验室研究中调查卤化前体气体的二次气溶胶形成及其对对流层卤素化学的影响。HaloProc研究单元旨在了解天然卤化过程中普遍存在的反应机制，其主要目标是提高对碘引发的新颗粒形成的理解。以前曾在具有有机碘化合物生物源的沿海环境中观察到活性碘物质的气溶胶粒子成核。在这里，我们建议研究新的粒子形成事件在盐湖环境中，可能占主导地位的无机源的活性碘化合物。将测量亚微米颗粒尺寸分布的时间演变，并将收集气溶胶过滤器样品用于随后的化学分析。补充实验室实验旨在模拟现场遇到的大气条件，并配备更先进的分析方法，将有助于确定有关的碘物种和碘引发的新粒子形成的关键反应机制。从现场和实验室工作的结合，一组广泛的实验数据，预计将提供给建模社区，以获得更深入的了解碘成核对卤素化学在对流层的影响。因此，拟议的研究议程旨在弥合现场实验，实验室研究和建模工作之间的差距，并有助于HaloProc研究单位的总体目标。

项目成果

New particle formation above a simulated salt lake in aerosol chamber experiments

气溶胶室实验中模拟盐湖上方新颗粒的形成

• DOI: 10.1071/en14225
• 发表时间: 2015
• 期刊: Environmental Chemistry
• 影响因子: 4.3
• 作者: Kamilli;Schmitt-Kopplin
• 通讯作者: Schmitt-Kopplin

How salt lakes affect atmospheric new particle formation: A case study in Western Australia.

盐湖如何影响大气新颗粒的形成：西澳大利亚的案例研究

• DOI: 10.1016/j.scitotenv.2016.08.058
• 发表时间: 2016
• 期刊: The Science of the total environment
• 作者: Kamilli;Krause;Sattler;Schmitt-Kopplin;Eitenberger;Friedbacher;Lohninger;Schöler
• 通讯作者: Schöler

Halogen-induced organic aerosol (XOA): a study on ultra-fine particle formation and time-resolved chemical characterization.

• DOI: 10.1039/c3fd00093a
• 发表时间: 2013-12
• 期刊: Faraday discussions
• 影响因子: 3.4
• 作者: J. Ofner;K. Kamilli;A. Held;B. Lendl;C. Zetzsch

Tip-Enhanced Raman Spectroscopy of Atmospherically Relevant Aerosol Nanoparticles.

• DOI: 10.1021/acs.analchem.6b02760
• 发表时间: 2016-09
• 期刊: Analytical chemistry
• 影响因子: 7.4
• 作者: J. Ofner;Tanja Deckert-Gaudig;K. Kamilli;A. Held;H. Lohninger;V. Deckert;B. Lendl