DOI: 10.1016/j.atmosenv.2015.10.057
Scopus记录号: 2-s2.0-84945533109
论文题名: Production of hydroxyl radicals from Fe-containing fine particles in Guangzhou, China
作者: Ma S ; , Ren K ; , Liu X ; , Chen L ; , Li M ; , Li X ; , Yang J ; , Huang B ; , Zheng M ; , Xu Z
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 123 起始页码: 72
结束页码: 78
语种: 英语
英文关键词: Fe-containing particle
; Hydroxyl radical
; Reactive oxygen species
; Single particle
; SPAMS
; Transition metal
Scopus关键词: Biological organs
; Dust
; Metals
; Redox reactions
; Fe-containing particles
; Hydroxyl radicals
; Reactive oxygen species
; Single particle
; SPAMS
; Transition metals
; antioxidant
; ferric ion
; glutathione
; hydroxyl radical
; iron oxide
; transition element
; annual variation
; antioxidant
; chemical composition
; chemical reaction
; dust
; ecotoxicology
; hydroxyl radical
; ionization
; particle size
; quantitative analysis
; seasonality
; software
; transition element
; Article
; chemical reaction
; China
; cluster analysis
; human
; ionization
; lung fluid
; particle size
; particulate matter
; priority journal
; sampling
; seasonal variation
; summer
; winter
; China
; Guangdong
; Guangzhou
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Reactive oxygen species (ROS) production from ambient fine particles has been correlated with the soluble transition metal content of PM2.5, which also has clear association with particle-mediated cardiopulmonary toxicity. Hydroxyl radical (OH) is the most harmful ROS species through chemical reactions of redox-active particle components. Atmospheric Fe, as the dominant species of the transition metals in the atmosphere, is associated with OH generation in ambient particle extracts. Our results revealed that Fe-containing particles (18,730 in total number) contributed approximately 3.7% on average to all detected particles throughout the summer and winter sampling period in Guangzhou, which was clustered into four distinct particle classes, including Fe-rich, Metal-rich, NaK-rich and Dust-rich. Fe-rich class was the dominant one with a fraction of 61%, followed by Dust-rich (14%), Metal-rich (13%). and NaK-rich (12%). The iron oxide was enriched in the Fe-rich class. OH generation induced by Fe-containing fine particles collected in Guangzhou (GZ) was quantified in a surrogate lung fluid (SLF), and it was found that Fe-containing fine particles were generally much reactive in generating OH in the presence of four antioxidants (200 μM ascorbate, 300 μM citrate, 100 μM reduced l-glutathione, and 100 μM uric acid). The annual average OH amount produced in our samples was 132.98 ± 27.43 nmol OH mg-1 PM2.5. OH production had a clear seasonal pattern with higher amount in summer and lower in winter. By measuring the amount of total and SLF-soluble metal in our PM2.5 samples using ICP-MS, we found that ROS activities were associated with the ionizable Fe through Fenton type reactions in the Guangzhou PM2.5. Expected burdens of PM2.5 derived OH in human lung lining fluid suggests that typical daily particulate matter exposure in Guangzhou is already a concern, and it could produce much higher levels of OH, leading to higher cytotoxicity. © 2015 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81376
Appears in Collections: 气候变化事实与影响
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作者单位: South China Institute of Environmental Sciences, MEP, Guangzhou, China; State Joint Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China; Atmospheric Environment Institute of Safety and Pollution Control, Jinan University, Guangdong, China; Guangzhou Hexin Analytical Instrument Company Limited, Guangzhou, China
Recommended Citation:
Ma S,, Ren K,, Liu X,et al. Production of hydroxyl radicals from Fe-containing fine particles in Guangzhou, China[J]. Atmospheric Environment,2015-01-01,123