Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-7721-2017 |
Enhanced toxicity of aerosol in fog conditions in the Po Valley, Italy | |
Decesari, Stefano1; Sowlat, Mohammad Hossein2; Hasheminassab, Sina2; Sandrini, Silvia1; Gilardoni, Stefania1; Facchini, Maria Cristina1; Fuzzi, Sandro1; Sioutas, Constantinos2 | |
2017-06-28 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy; USA |
英文摘要 | While numerous studies have demonstrated the association between outdoor exposure to atmospheric particulate matter (PM) and adverse health effects, the actual chemical species responsible for PM toxicological properties remain a subject of investigation. We provide here reactive oxygen species (ROS) activity data for PM samples collected at a rural site in the Po Valley, Italy, during the fog season (i.e., November-March). We show that the intrinsic ROS activity of Po Valley PM, which is mainly composed of biomass burning and secondary aerosols, is comparable to that of traffic-related particles in urban areas. The airborne concentration of PM components responsible for the ROS activity decreases in fog conditions, when water-soluble species are scavenged within the droplets. Due to this partitioning effect of fog, the measured ROS activity of fog water was contributed mainly by water-soluble organic carbon (WSOC) and secondary inorganic ions rather than by transition metals. We found that the intrinsic ROS activity of fog droplets is even greater (> 2.5 times) than that of the PM on which droplets are formed, indicating that redox-active compounds are not only scavenged from the particulate phase, but are also produced within the droplets. Therefore, even if fog formation exerts a scavenging effect on PM mass and redox-active compounds, the aqueous-phase formation of reactive secondary organic compounds can eventually enhance ROS activity of PM when fog evaporates. These findings, based on a case study during a field campaign in November 2015, indicate that a significant portion of airborne toxicity in the Po Valley is largely produced by environmental conditions (fog formation and fog processing) and not simply by the emission and transport of pollutants. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404681400001 |
WOS关键词 | ATMOSPHERIC PARTICULATE MATTER ; SECONDARY ORGANIC AEROSOL ; LOS-ANGELES BASIN ; QUASI-ULTRAFINE PARTICLES ; LONG-TERM EXPOSURE ; SOURCE APPORTIONMENT ; AIR-POLLUTION ; REDOX ACTIVITY ; AMBIENT PARTICLES ; FINE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/18346 |
专题 | 地球科学 |
作者单位 | 1.Natl Res Council Italy, Inst Atmospher Sci & Climate, Bologna, Italy; 2.Univ Southern Calif, Dept Civil & Environm Engn, Los Angeles, CA USA |
推荐引用方式 GB/T 7714 | Decesari, Stefano,Sowlat, Mohammad Hossein,Hasheminassab, Sina,et al. Enhanced toxicity of aerosol in fog conditions in the Po Valley, Italy[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(12). |
APA | Decesari, Stefano.,Sowlat, Mohammad Hossein.,Hasheminassab, Sina.,Sandrini, Silvia.,Gilardoni, Stefania.,...&Sioutas, Constantinos.(2017).Enhanced toxicity of aerosol in fog conditions in the Po Valley, Italy.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(12). |
MLA | Decesari, Stefano,et al."Enhanced toxicity of aerosol in fog conditions in the Po Valley, Italy".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.12(2017). |
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