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Effect of Atmospheric Organic Complexation on Iron-bearing Dust Solubility : Volume 13, Issue 2 (04/02/2013)

By Paris, R.

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Book Id: WPLBN0003996567
Format Type: PDF Article :
File Size: Pages 24
Reproduction Date: 2015

Title: Effect of Atmospheric Organic Complexation on Iron-bearing Dust Solubility : Volume 13, Issue 2 (04/02/2013)  
Author: Paris, R.
Volume: Vol. 13, Issue 2
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Paris, R., & Desboeufs, K. V. (2013). Effect of Atmospheric Organic Complexation on Iron-bearing Dust Solubility : Volume 13, Issue 2 (04/02/2013). Retrieved from

Description: LISA, UMR7583, CNRS – Université Paris Est Créteil (UPEC) et Université Paris Diderot (UPD), Institut Pierre Simon Laplace, Paris, France. Recent studies reported that the effect of organic complexation may be a potentially important process to be considered in models to estimate atmospheric iron flux to the ocean. In this study, we investigated this effect by a series of dissolution experiments on iron-bearing dust in presence or absence of various organic compounds typically found in the atmospheric waters (acetate, formate, oxalate, malonate, succinate, glutarate, glycolate, lactate, tartrate and humic acid as an analogue of humic like substances (HULIS)). Only 4 of tested organic ligands (oxalate, malonate, tartrate and humic acid) caused an enhancement of iron solubility which was associated with an increase of dissolved Fe(II) concentrations. For all of these organic ligands, a positive linear dependence of iron solubility to organic concentrations was observed and showed that the extent of organic complexation on iron solubility decreased in order oxalate > malonate = tartrate > humic acid. This was attributed to the ability of electron donors of organic ligands and implied a reductive ligand-promoted dissolution. This study confirmed that oxalate is the most effective ligand playing on dust iron solubility and showed, for the first time, the potential effect of HULIS on iron dissolution in atmospheric conditions.

Effect of atmospheric organic complexation on iron-bearing dust solubility

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