Non-sulfate sulfur in fine aerosols across the United States: Insight for organosulfate prevalence.
Non-sulfate sulfur in fine aerosols across the United States: Insight for organosulfate prevalence.
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DOI：
10.1016/j.atmosenv.2014.10.058
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发表时间：
2015-01-01
影响因子：
5
通讯作者：
Peltier, Richard E.
中科院分区：
文献类型：
--
作者：
Shakya, Kabindra M.;Peltier, Richard E.
我们调查了2000年至2012年美国（334个地点）两种不同的形态分析方法，X射线荧光（XRF）光谱法和离子色谱法（IC）长期硫测量的差异。总体而言，XRF光谱法和IC法的硫测量值之间存在良好的相关性（大多数位点的R ≥ 0.90）。然而，通过离子色谱法测量的无机硫酸盐不足以解释在许多位点通过XRF光谱法测量的所有硫。通过XRF光谱法测量的硫与通过IC测量的硫的高比率观察到不一致性。如此高的比例也表现出季节性变化，并在不同的土地利用类型;显着差异发生在森林，农业和移动的分类的位置，但不是在商业，沙漠，工业和住宅分类的位置。平均而言，过量或非硫酸盐硫（未测量的有机硫或其他无机硫）是可变的，观察到高达有机碳的约13%和PM2.5的约2%。这种假定的有机硫在美国东部地区的贡献大于其他地理位置。除时间和空间变化趋势外，还与气溶胶酸度和排放源等因素有关。结果表明，这些未测量的硫物种可能有显着的贡献，气溶胶负担，这些可以帮助控制PM2.5水平和评估硫气溶胶的其他影响的理解。
We investigated the discrepancies in long-term sulfur measurements from 2000 to 2012 by two separate speciation methods, X-ray fluorescence (XRF) spectroscopy and ion chromatography (IC) across the United States (334 sites). Overall, there was a good correlation between sulfur measurements by XRF spectroscopy and IC (R ≥ 0.90 for most of the sites). However, the inorganic sulfate measured by ion chromatography was not sufficient to account for all the sulfur measured by XRF spectroscopy at many of the sites. Discrepancies were observed with the high ratios of sulfur measured by XRF spectroscopy to that by IC. Such high ratios also exhibited seasonal variation, and differed across land use types; significant differences occurred at locations classified as forest, agriculture, and mobile, but not in locations classified as commercial, desert, industrial, and residential. On average, the excess, or non-sulfate, sulfur (unmeasured organic sulfur or other inorganic species of sulfur) was variable and observed as high as ~13% of organic carbon and ~2% of PM2.5. The contribution of such assumed organosulfur was larger in the eastern region than other geographical locations in the United States. Besides the temporal and spatial trends, the additional sulfur was found to be related to other factors such as aerosol acidity and emission sources. The results suggest that these unmeasured sulfur species could have significant contribution to aerosol burden, and the understanding of these could help to control PM2.5 levels and to assess other effects of sulfur aerosols.
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影响因子：
5.2
作者：
BARNES, I;BECKER, KH;PATROESCU, I
通讯作者：
PATROESCU, I
影响因子：
11.4
作者：
Blando, JD;Porcja, RJ;Turpin, BJ
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Turpin, BJ
影响因子：
4.4
作者：
Graham, B;Guyon, P;Andreae, MO
通讯作者：
Andreae, MO
影响因子：
4.4
作者：
Ge, Xinlei;Setyan, Ari;Zhang, Qi
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Zhang, Qi
影响因子：
11.4
作者：
Iinuma, Yoshiteru;Muller, Conny;Herrmann, Hartmut
通讯作者：
Herrmann, Hartmut