Fractional iron solubility of aerosol particles enhanced by biomass burning and ship emission in Shanghai, East China

Fu, Huaiyu; Shang, Guangfeng; Lin, Jun; Hu, Yunjie; Hu, Qingqing; Li, Guo; Zhang, Y.C.; Chen, Jianmin

doi:10.1016/j.scitotenv.2014.01.118

Cited by 41 publications

(38 citation statements)

References 54 publications

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“…In general, the total and soluble-iron trends seen in this data compilation are similar to those seen in other aerosol iron data sets for specific regions [33,34,47,73,89,92,93]. For aerosol iron, samples that are high in total iron have low fractional iron solubility, and samples with low total iron have higher fractional iron solubility [86].…”

Section: Discussionsupporting

confidence: 79%

Enhanced Iron Solubility at Low pH in Global Aerosols

et al. 2018

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Abstract:The composition and oxidation state of aerosol iron were examined using synchrotron-based iron near-edge X-ray absorption spectroscopy. By combining synchrotron-based techniques with water leachate analysis, impacts of oxidation state and mineralogy on aerosol iron solubility were assessed for samples taken from multiple locations in the Southern and the Atlantic Oceans; and also from Noida (India), Bermuda, and the Eastern Mediterranean (Crete). These sampling locations capture iron-containing aerosols from different source regions with varying marine, mineral dust, and anthropogenic influences. Across all locations, pH had the dominating influence on aerosol iron solubility. When aerosol samples were approximately neutral pH, iron solubility was on average 3.4%; when samples were below pH 4, the iron solubility increased to 35%. This observed aerosol iron solubility profile is consistent with thermodynamic predictions for the solubility of Fe(III) oxides, the major iron containing phase in the aerosol samples. Source regions and transport paths were also important factors affecting iron solubility, as samples originating from or passing over populated regions tended to contain more soluble iron. Although the acidity appears to affect aerosol iron solubility globally, a direct relationship for all samples is confounded by factors such as anthropogenic influence, aerosol buffer capacity, mineralogy and physical processes.

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Section: Discussionsupporting

confidence: 79%

Enhanced Iron Solubility at Low pH in Global Aerosols

et al. 2018

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“…The highest PM 10 concentrations were 322.8, 244.5, 437.4 and 335.9 μg/m 3 on 7, 9, 14 and 28 February, respectively. On 7, 14 and 28 February, the average hourly ratio of PM 2.5 /PM 10 reached the low value of 0.32, 0.31 and 0.32, respectively, indicating the characteristic of coarse particle pollution (Fu et al, 2014). There was dusty weather on 28 February, so we supposed that the locally raised dusty weather contributed to the coarse particle pollution on 28 February.…”

Section: Back Trajectorymentioning

confidence: 87%

“…Biomass burning is a global phenomenon that is one of the major sources of airborne particulate matter, and exerts an important impact on the environment and climate on a global scale (Houghton et al, 2001;Fiedler et al, 2010;Fu et al, 2012;Fu et al, 2014). Measurements of K have been widely used as a source tracer for biomass burning emissions and have been applied in source appointment studies (Khalil and Rasmussen, 2003;Hays et al, 2005).…”

Section: Si-richmentioning

confidence: 99%

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Individual particle analysis of aerosols collected at Lhasa City in the Tibetan Plateau

Zhang

Kong

et al. 2015

Journal of Environmental Sciences

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“…Atmospheric Fe may also come from anthropogenic sources, in particular from regions with heavy air pollution in the Northern Hemisphere. Major anthropogenic sources for Fe include agricultural practices [4], biomass burning [6,7] and combustion emissions [8][9][10]. Recent model results suggest that combustion-derived Fe can represent a large portion of soluble Fe fluxes, with the highest values (30%) close to the East Asian continent in the North Pacific [11].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Atmospheric Iron Speciation and Acid Processing at Metropolitan Newark on the US East Coast

Gao

2017

Atmosphere

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Abstract:To characterize atmospheric dissolved iron over Newark, a large metropolitan city on US east coast, size-segregated (0.056-18 µm in aerodynamic diameter) aerosols were collected in downtown Newark, New Jersey during August to October 2012. Aerosols samples were analyzed for Fe(II) and total dissolved iron (Fe(TD)) by UV/Visible spectroscopy, and water soluble compounds were analyzed by ion chromatograph (IC). Results from this study showed that Fe(II) concentrations were 2.1 ng m −3 (range: 1.2-4.2 ng m −3 ), Fe(TD) concentrations were 2.4 ng m −3 (range: 1.3-4.9 ng m −3 ). Dissolved iron (Fe(II) and Fe(TD)) in general appeared as bi-modal size distribution, was mainly accumulated in the fine mode. The highest concentration of dissolved iron displayed in the fine mode, which was associated with high concentrations of sulfate, oxalate and nitrate, suggesting the potential for Fe-acids interactions. Dissolved iron presented positive correlations with sulfate in the coarse mode, and with nitrate in the fine mode, further suggesting the importance of acid processing in aerosol iron solubility. However, as the oxalate concentration was so low, a good correlation between dissolved iron and oxalate in both the fine and coarse mode was not found.

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Fractional iron solubility of aerosol particles enhanced by biomass burning and ship emission in Shanghai, East China

Cited by 41 publications

References 54 publications

Enhanced Iron Solubility at Low pH in Global Aerosols

Enhanced Iron Solubility at Low pH in Global Aerosols

Individual particle analysis of aerosols collected at Lhasa City in the Tibetan Plateau

Characterization of Atmospheric Iron Speciation and Acid Processing at Metropolitan Newark on the US East Coast

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