Influence of atmospheric processes on the solubility and composition of iron in Saharan dust

Longo, Amelia F.; Feng, Yan; Lai, Barry; Landing, William M.; Shelley, Rachel U.; Nenes, Athanasios; Mihalopoulos, Nikolaos; Violaki, Kalliopi; Ingall, Ellery D.

doi:10.1021/acs.est.6b02605

Title: Influence of atmospheric processes on the solubility and composition of iron in Saharan dust

Journal Article · Fri Jun 10 00:00:00 EDT 2016 · Environmental Science and Technology

DOI:https://doi.org/10.1021/acs.est.6b02605· OSTI ID:1339565

Longo, Amelia F. ^[1]; Feng, Yan ^[2]; Lai, Barry ^[2]; Landing, William M. ^[3]; Shelley, Rachel U. ^[4]; Nenes, Athanasios ^[5]; Mihalopoulos, Nikolaos ^[6]; Violaki, Kalliopi ^[7]; Ingall, Ellery D. ^[1]

Georgia Inst. of Technology, Atlanta, GA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Florida State Univ., Tallahassee, FL (United States)
Florida State Univ., Tallahassee, FL (United States); Institut Univ. Europeen de la Mer, Plouzane (France)
Georgia Inst. of Technology, Atlanta, GA (United States); Foundation for Research and Technology, Patras (Greece); National Observatory of Athens, Penteli (Greece)
National Observatory of Athens, Penteli (Greece); Univ. of Crete, Iraklion (Greece)
Univ. of Crete, Iraklion (Greece)

Aerosol iron was examined in Saharan dust plumes using a combination of iron near-edge X-ray absorption spectroscopy and wet-chemical techniques. Aerosol samples were collected at three sites located in the Mediterranean, the Atlantic, and Bermuda to characterize iron at different atmospheric transport lengths and time scales. Iron(III) oxides were a component of aerosols at all sampling sites and dominated the aerosol iron in Mediterranean samples. In Atlantic samples, iron(II and III) sulfate, iron(III) phosphate, and iron(II) silicates were also contributors to aerosol composition. With increased atmospheric transport time, iron(II) sulfates are found to become more abundant, aerosol iron oxidation state became more reduced, and aerosol acidity increased. As a result, atmospheric processing including acidic reactions and photoreduction likely influence the form of iron minerals and oxidation state in Saharan dust aerosols and contribute to increases in aerosol-iron solubility.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Science Foundation (NSF); European Union - European Social Fund (ESF); European Union - National Strategic Reference Framework (NSRF) - Education and Lifelong Learning Research Funding Program (ARISTEIA)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1339565

Journal Information:: Environmental Science and Technology, Vol. 50, Issue 13; ISSN 0013-936X

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 57 works

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Fine particle pH and gas–particle phase partitioning of inorganic species in Pasadena, California, during the 2010 CalNex campaign Guo, Hongyu; Liu, Jiumeng; Froyd, Karl D. Atmospheric Chemistry and Physics, Vol. 17, Issue 9 https://doi.org/10.5194/acp-17-5703-2017	journal	January 2017
Improved methodologies for Earth system modelling of atmospheric soluble iron and observation comparisons using the Mechanism of Intermediate complexity for Modelling Iron (MIMI v1.0) Hamilton, Douglas S.; Scanza, Rachel A.; Feng, Yan Geoscientific Model Development, Vol. 12, Issue 9 https://doi.org/10.5194/gmd-12-3835-2019	journal	January 2019
High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom Shoenfelt, Elizabeth M.; Sun, Jing; Winckler, Gisela Science Advances, Vol. 3, Issue 6 https://doi.org/10.1126/sciadv.1700314	journal	June 2017
Soluble iron nutrients in Saharan dust over the central Amazon rainforest Rizzolo, Joana A.; Barbosa, Cybelli G. G.; Borillo, Guilherme C. Atmospheric Chemistry and Physics, Vol. 17, Issue 4 https://doi.org/10.5194/acp-17-2673-2017	journal	January 2017
Regional trends in the fractional solubility of Fe and other metals from North Atlantic aerosols (GEOTRACES cruises GA01 and GA03) following a two-stage leach Shelley, Rachel U.; Landing, William M.; Ussher, Simon J. Biogeosciences, Vol. 15, Issue 8 https://doi.org/10.5194/bg-15-2271-2018	journal	January 2018
Endogenous doesn’t always mean innocuous: a scoping review of iron toxicity by inhalation Morgan, Jody; Bell, Robin; Jones, Alison L. Journal of Toxicology and Environmental Health, Part B, Vol. 23, Issue 3 https://doi.org/10.1080/10937404.2020.1731896	journal	February 2020
Phosphorus solubility in aerosol particles related to particle sources and atmospheric acidification in Asian continental outflow Shi, Jinhui; Wang, Nan; Gao, Huiwang Atmospheric Chemistry and Physics Discussions https://doi.org/10.5194/acp-2018-892	journal	October 2018
Endogenous doesn’t always mean innocuous: a scoping review of iron toxicity by inhalation Morgan, Jody; Bell, Robin; Jones, Alison L. Taylor & Francis https://doi.org/10.6084/m9.figshare.11912061	text	January 2020
High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom Shoenfelt, Elizabeth M.; Sun, Jing; Winckler, Gisela Columbia University https://doi.org/10.7916/d83b78f6	text	January 2017

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