Iron Speciation of Natural and Anthropogenic Dust by Spectroscopic and Chemical Methods

被引：16

作者：

Petroselli, Chiara ^{[1
,2
]}

Moroni, Beatrice ^{[1
,3
]}

Crocchianti, Stefano ^{[1
]}

Selvaggi, Roberta ^{[1
]}

Vivani, Riccardo ^{[4
]}

Soggia, Francesco ^{[5
]}

Grotti, Marco ^{[5
]}

d'Acapito, Francesco ^{[6
]}

Cappelletti, David ^{[1
,3
,7
]}

机构：

[1] Univ Perugia, Dipartimento Chim Biol & Biotecnol, Via Elce Sotto 8, I-06123 Perugia, Italy

[2] CNR IBIMET, Via P Gobetti 101, I-40129 Bologna, Italy

[3] Univ Perugia, SMAArt, Piazza Univ 1, I-06123 Perugia, Italy

[4] Univ Perugia, Dipartimento Sci Farmaceut, Via A Fabretti 48, I-06123 Perugia, Italy

[5] Univ Genoa, Dipartimento Chim & Chim Ind, Via Dodecaneso 31, I-16146 Genoa, Italy

[6] ESRF LISA CRG, CNR IOM OGG, 71 Ave Martyrs, F-38043 Grenoble, France

[7] CNR ISAC, Via P Gobetti 101, I-40129 Bologna, Italy

来源：

ATMOSPHERE | 2019年 / 10卷 / 01期

关键词：

iron speciation; XANES; EXAFS; selective leaching experiments; Saharan dust; steel plant emissions; RAY-ABSORPTION SPECTROSCOPY; LONG-RANGE TRANSPORT; NORTH-AFRICAN DUST; DESERT DUST; ATMOSPHERIC AEROSOLS; LOCAL-STRUCTURE; FINE-STRUCTURE; STEEL PLANT; FE; URBAN;

D O I：

10.3390/atmos10010008

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this work, we have characterized the iron local structure in samples of two different types of atmospheric dust using X-ray absorption spectroscopy and selective leaching experiments. Specifically, we have investigated samples of long-range transported Saharan dust and freshly emitted steel plant fumes with the aim of individuating possible fingerprints of iron in the two cases. Findings include (1) prevalence of octahedral coordinated Fe<mml:semantics>3+</mml:semantics> for all samples; (2) presence of 6-fold coordinated Fe<mml:semantics>3+</mml:semantics>, aluminosilicates and iron oxy(hydr)oxides in Saharan dust and (3) of Fe-bearing spinel-like structures in the industrial fumes; (4) general predominance of the residual insoluble fraction with a notable difference: 69% for Saharan dust and 93% for steel production emissions, associated with aluminosilicates and non-reducible iron oxy(hydr)oxides, and Fe spinels, respectively. The remarkable differences between the X-ray absorption spectroscopy (XAS) spectra and leaching test results for the two sample types suggest the possibility to exploit the present approach in more complex cases. To this aim, two additional case studies of mixed aerosol samples are presented and discussed.

引用

页数：15

共 63 条

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