CCPortal
DOI10.5194/acp-21-8761-2021
Physical and chemical properties of urban aerosols in São Paulo, Brazil: Links between composition and size distribution of submicron particles
Monteiro Dos Santos D.; Rizzo L.V.; Carbone S.; Schlag P.; Artaxo P.
发表日期2021
ISSN1680-7316
起始页码8761
结束页码8773
卷号21期号:11
英文摘要In this work, the relationships between size and composition of submicron particles (PM1) were analyzed at an urban site in the Metropolitan Area of São Paulo (MASP), a megacity with about 21 million inhabitants. The measurements were carried out from 20 December 2016 to 15 March 2017. The chemical composition was measured with an Aerodyne Aerosol Chemical Speciation Monitor and size distribution with a TSI Scanning Mobility Particle Sizer 3082. PM1 mass concentrations in the MASP had an average mass concentration of 11.4 μg m-3. Organic aerosol (OA) dominated the PM1 composition (56 %), followed by sulfate (15 %) and equivalent black carbon (eBC, 13 %). Four OA classes were identified using positive matrix factorization: oxygenated organic aerosol (OOA, 40 % of OA), biomass burning organic aerosol (BBOA, 13 %), and two hydrocarbon-like OA components (a typical HOA related to vehicular emissions (16 %) and a second HOA (21 %) representing a mix of anthropogenic sources). Particle number concentrations averaged 12 100±6900 cm-3, dominated by the Aitken mode. The accumulation mode increased under relatively high-PM1 conditions, suggesting an enhancement of secondary organic aerosol (SOA) production. Conversely, the contribution of nucleation-mode particles was less dependent on PM1 levels, consistent with vehicular emissions. The relationship between aerosol size modes and PM1 composition was assessed by multilinear regression (MLR) models. Secondary inorganic aerosols were partitioned between Aitken and accumulation modes, related to condensation particle growth processes. Submicron mass loading in the accumulation mode was mostly associated with highly oxidized OOA and also traffic-related emissions. To the authors' knowledge, this is the first work that uses the MLR methodology to estimate the chemical composition of the different aerosol size modes. The chemical composition with size-dependent PM provides innovative information on the properties of both primary and secondary organic aerosols, as well as inorganic aerosols in a complex urban environment. The results emphasize the relevance of vehicular emissions to the air quality at MASP and highlight the key role of secondary processes on the PM1 ambient concentrations in the region since 56 % of PM1 mass loading was attributed to SOA and secondary inorganic aerosol. © Copyright:
语种英语
scopus关键词aerosol; biomass burning; chemical composition; chemical property; concentration (composition); particle size; physical property; size distribution; traffic emission; urban area; Brazil; Sao Paulo [Brazil]; Sao Paulo [Sao Paulo (STT)]; Varanidae
来源期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/246821
作者单位Institute of Physics, University of São Paulo, São Paulo, Brazil; Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, São Paulo, Brazil; Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil; Shimadzu Deutschland GmbH, Duisburg, 47269, Germany
推荐引用方式
GB/T 7714
Monteiro Dos Santos D.,Rizzo L.V.,Carbone S.,et al. Physical and chemical properties of urban aerosols in São Paulo, Brazil: Links between composition and size distribution of submicron particles[J],2021,21(11).
APA Monteiro Dos Santos D.,Rizzo L.V.,Carbone S.,Schlag P.,&Artaxo P..(2021).Physical and chemical properties of urban aerosols in São Paulo, Brazil: Links between composition and size distribution of submicron particles.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11).
MLA Monteiro Dos Santos D.,et al."Physical and chemical properties of urban aerosols in São Paulo, Brazil: Links between composition and size distribution of submicron particles".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Monteiro Dos Santos D.]的文章
[Rizzo L.V.]的文章
[Carbone S.]的文章
百度学术
百度学术中相似的文章
[Monteiro Dos Santos D.]的文章
[Rizzo L.V.]的文章
[Carbone S.]的文章
必应学术
必应学术中相似的文章
[Monteiro Dos Santos D.]的文章
[Rizzo L.V.]的文章
[Carbone S.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。