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Phenol Reactions in Aqueous Particles as a Source of Secondary Organic Aerosol

作为二次有机气溶胶来源的水颗粒中的苯酚反应

基本信息

批准号：
1649212
负责人：
Cort Anastasio
金额：
$ 80.09万
依托单位：
University of California-Davis
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-04-15 至 2022-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1649212&HistoricalAwards=false
关键词：
Phenol Reactions Aqueous Particles Source

项目摘要

It is established that wildfires and biomass burning emit particles directly that harm human health. It has recently been recognized that reactive gases emitted by burning wood can also convert to particles, and this indirect particle production would exacerbate the exposure problem for humans. The work will investigate the mechanisms by which key reactive gases in fire plumes react in the laboratory and field to quantify the indirect production of particles and estimate its impacts on human exposure.This research builds on recent laboratory work that phenols emitted by biomass burning in large amounts could provide a large source of secondary particles via reactions in cloud and fog drops since the phenols partition into the aqueous phase relatively easily. However, secondary particle enhancement has not yet been observed in the field presumably due to the effects of dilution and evaporation of semi-volatile gases during aging of fire plumes. The project will investigate if and how targeted phenols that are reactive gases present in significant amounts in biomass burning effluents can be converted to particles. The research will isolate and measure the fundamental processes in the laboratory and field and integrate them to elucidate the mechanism of phenol to particle conversion. The results will improve the assessment of the contributions of secondary particle formation in fire plumes to human exposure.

据确定，野火和生物质燃烧排放的颗粒物直接危害人类健康。最近人们认识到，燃烧木材排放的活性气体也可以转化为颗粒，这种间接的颗粒产生将加剧人类的暴露问题。这项研究将研究火羽流中的关键活性气体在实验室和现场反应的机制，以量化颗粒物的间接产生，并估计其对人类暴露的影响。这项研究建立在最近的实验室工作的基础上，即大量生物质燃烧排放的酚类物质可以通过云和雾滴中的反应提供大量的二次颗粒物来源，因为酚类物质分配到水相中相对容易。然而，二次粒子的增强尚未观察到在该领域可能是由于稀释和蒸发的半挥发性气体在火灾羽流老化的影响。该项目将研究是否以及如何将生物质燃烧流出物中大量存在的目标酚类反应气体转化为颗粒。该研究将分离和测量实验室和现场的基本过程，并将其整合，以阐明苯酚转化为颗粒的机制。研究结果将有助于更好地评估火羽流中二次粒子形成对人体暴露的影响。

项目成果

期刊论文数量（11）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Photooxidants from brown carbon and other chromophores in illuminated particle extracts

DOI：
10.5194/acp-19-6579-2019
发表时间：
2019-05-17
期刊：
ATMOSPHERIC CHEMISTRY AND PHYSICS
影响因子：
6.3
作者：
Kaur, Richie;Labins, Jacqueline R.;Anastasio, Cort
通讯作者：
Anastasio, Cort

Formation and Evolution of aqSOA from Aqueous-Phase Reactions of Phenolic Carbonyls: Comparison between Ammonium Sulfate and Ammonium Nitrate Solutions

DOI：
10.1021/acs.est.8b03441
发表时间：
2018-08-21
期刊：
ENVIRONMENTAL SCIENCE & TECHNOLOGY
影响因子：
11.4
作者：
Huang, Dan Dan;Zhang, Qi;Chan, Chak K.
通讯作者：
Chan, Chak K.

Nitrite-Mediated Photooxidation of Vanillin in the Atmospheric Aqueous Phase

常压水相中亚硝酸盐介导的香兰素光氧化

DOI：
10.1021/acs.est.9b03649
发表时间：
2019
期刊：
Environmental Science & Technology
影响因子：
11.4
作者：
Pang Hongwei;Zhang Qi;Lu Xiaohui;Li Kangning;Chen Hong;Chen Jianmin;Yang Xin;Ma Yingge;Ma Jialiang;Huang Cheng
通讯作者：
Huang Cheng

Aqueous reactions of organic triplet excited states with atmospheric alkenes