Relationship between Atmospheric Aerosol Mineral Surface Area and Iron Solubility
Relationship between Atmospheric Aerosol Mineral Surface Area and Iron Solubility
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大气气溶胶矿物表面积与铁溶解度的关系
DOI：
10.1021/acsearthspacechem.9b00152
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发表时间：
2019
影响因子：
3.4
通讯作者：
Lai, Barry
中科院分区：
文献类型：
--
作者：
McDaniel, Mary Francis;Ingall, Ellery D.;Morton, Peter L.;Castorina, Erin;Weber, Rodney J.;Shelley, Rachel U.;Landing, William M.;Longo, Amelia F.;Feng, Yan;Lai, Barry
在大西洋的船上收集了来自源区（包括撒哈拉沙漠、北美和当地海洋环境）的粒度分级粉尘气溶胶（>7.2、7.2-3、3-1.5、1.5-0.95、0.95-0.49和<0.49 μm）。铁矿物学，氧化态和溶解度进行了研究，使用湿化学和同步加速器为基础的铁K边X射线吸收近边结构（XANES）光谱。可溶性铁浓度与计算的气溶胶表面积呈强正相关（R2= 0.81）。铁XANES光谱，所有尺寸范围内，几乎是相同的撒哈拉样品。来自北美和当地的大气（海洋）种源的光谱表现出更多的粒度级之间的变化，与粒径没有明显的趋势。撒哈拉光谱与北美光谱不同，这证实了两个来源的不同成分。海洋光谱显示了北美和撒哈拉的一系列光谱特征，可能反映出海洋样本最终来自这些来源，也可能来自其他来源。然而，尽管组成有显著变化，表面积是影响总铁溶解度的主要因素。通过酸性表面反应的气溶胶铁增溶在具有最高表面积的样品中将是最有效的，这可能导致与蒸馏水中可溶性铁浓度的强正相关性。
Size-fractionated dust aerosols (>7.2, 7.2–3, 3–1.5, 1.5–0.95, 0.95–0.49, and <0.49 μm) originating from source regions, including the Sahara, North America, and the local marine environment, were collected shipboard in the Atlantic Ocean. Iron mineralogy, oxidation state, and solubility were examined using wet chemistry and synchrotron-based iron K-edge X-ray absorption near edge structure (XANES) spectroscopy. The soluble iron concentration showed a strong positive correlation with calculated aerosol surface area (R2= 0.81). The iron XANES spectra, for all size ranges, were nearly identical for Saharan samples. Spectra from North American and local atmosphere (marine) provenances exhibited more variation between size fractions, with no obvious trends with the particle size. Saharan spectra were distinct from North American spectra, which confirms the different compositions of the two sources. Marine spectra displayed a range of both North American and Saharan spectral characteristics, likely reflecting that the marine samples are ultimately derived from these and potentially other sources. However, despite the notable variation in compositions, the surface area is the predominant factor affecting total iron solubility. Aerosol iron solubilization through acidic surface reactions would be most effective in samples with the highest surface area, which likely results in the strong positive correlation with soluble iron concentration in distilled water.
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影响因子：
11.4
作者：
M. Oakes;E. Ingall;Barry Lai;Martin M. Shafer;Michael D. Hays;Zhen Liu;Armistead G. Russell;Rodney J. Weber
通讯作者：
M. Oakes;E. Ingall;Barry Lai;Martin M. Shafer;Michael D. Hays;Zhen Liu;Armistead G. Russell;Rodney J. Weber
影响因子：
6.3
作者：
Oakes, M.;Weber, R. J.;Ingall, E. D.
通讯作者：
Ingall, E. D.
影响因子：
3.3
作者：
Zongbo Shi;M. Krom;T. Jickells;S. Bonneville;K. Carslaw;N. Mihalopoulos;A. Baker;L. Benning
通讯作者：
Zongbo Shi;M. Krom;T. Jickells;S. Bonneville;K. Carslaw;N. Mihalopoulos;A. Baker;L. Benning
高海拔撒哈拉空气层中可溶性铁粉尘的输出
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
Lidia M. Ravelo;S. Rodríguez;L. Galindo;M. I. García;A. Alastuey;J. López
通讯作者：
J. López
影响因子：
6.3
作者：
A. Nenes;M. Krom;N. Mihalopoulos;P. Cappellen;Zongbo Shi;A. Bougiatioti;P. Zarmpas;B. Herut
通讯作者：
A. Nenes;M. Krom;N. Mihalopoulos;P. Cappellen;Zongbo Shi;A. Bougiatioti;P. Zarmpas;B. Herut