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Atmospheric input and retention of iodine in organic-rich soils: marine-influenced versus continental areas

Applicant Winkel Lenny
Number 156586
Funding scheme Project funding (Div. I-III)
Research institution Institut für Biogeochemie und Schadstoffdynamik ETH Zürich
Institution of higher education Swiss Federal Institute of Aquatic Science and Technology - EAWAG
Main discipline Other disciplines of Environmental Sciences
Start/End 01.01.2015 - 31.12.2016
Approved amount 248'070.00
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All Disciplines (2)

Discipline
Other disciplines of Environmental Sciences
Geochemistry

Keywords (9)

iodine; peat; organic matter; synchrotron spectroscopy; wet deposition; isotopes; trace elements; soils; speciation

Lay Summary (German)

Lead
Weltweit leiden über 2 Mrd. Menschen an Jodmangel. Jod ist ein essentielles Element dessen Unterversorgung gravierende gesundheitliche Folgen hat. Durch Jodmangel wird die Funktion der Schilddrüse und der Stoffwechsel gestört, woraus beispielsweise Konzentrationsschwäche, Müdigkeit, aber auch Kropfbildung und Kretinismus bei Neugeborenen resultieren können. Allgemein nehmen wir Jod über die Nahrung (Fisch, Meeresfrüchte oder jodiertes Speisesalz) auf, wenn es nicht als Nahrungsergänzungsmittel verabreicht wird. Vor allem in weniger entwickelten Gebieten ist es schwierig eine ausreichende Jodversorgung zu gewährleisten, weshalb aktuell die Aufnahme über pflanzliche Nahrung diskutiert wird. Um Massnahmen zu erforschen, die Jodmangel vorbeugen könnten und ggf. natürliche Ressourcen als entsprechende Quellen zu nutzen, ist es daher unumgänglich zu verstehen wie Jod verbreitet wird, welche verschiedenen Quellen es gibt und wie es letztlich im Boden zurückgehalten wird.
Lay summary

INHALT UND ZEIL DES FORSCHUNGSPROJEKTES

Unser übergeordnetes Forschungsziel ist, die Verbreitung und das Vorkommen von Jod näher unter dem Aspekt marin-beeinflusste vs. kontinentaler Gebiete zu untersuchen. Ein multidimensionaler Ansatz soll dabei Aufschluss über marine aber auch mögliche kontinentalen Quellen geben sowie Transportwege und Senken auf dem Land aufzeigen. Jod wird dabei komplementär zu Elementen mit ähnlichem, teils eng verwandtem Verbreitungsmuster (z.B. S, Br, Cl) betrachtet und Elementspeziierungen in Zusammenhang mit Isotopen-Sourcetracking verschiedener Umweltkompartimente gebracht.

WISSENSCHAFTLICHER UND GESELLSCHAFTLICHER ASPEKT

Unsere Forschungsarbeiten werden wichtige Informationen über Hauptverbreitungsmechanismen von Jod und anderen marinen Elementen in kontinentalen Gebieten im Vergleich zu direkt marin beeinflusste Gebiete liefern. Dabei werden entsprechende Senken oder auch interkontinentaler Quellen aufzeigen. Darüber hinaus wird dieser Multielement-Ansatz wichtige Daten im Bereich der Isotopenumweltgeochemie beisteuern und entsprechende methodische Ansätze erweitern.

Direct link to Lay Summary Last update: 19.01.2015

Responsible applicant and co-applicants

Employees

Publications

Publication
Marine versus Continental Sources of Iodine and Selenium in Rainfall at Two European High-Altitude Locations
Suess Elke, Aemisegger Franziska, Sonke Jeroen E., Sprenger Michael, Wernli Heini, Winkel Lenny H. E. (2019), Marine versus Continental Sources of Iodine and Selenium in Rainfall at Two European High-Altitude Locations, in Environmental Science & Technology, 53(4), 1905-1917.

Collaboration

Group / person Country
Types of collaboration
Dr. Stephan Henne, EMPA Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Prof. Stefano Bernasconi/ ETH Zurich, Department of Earth Sciences Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
ETH Zurich/Institut für Atmosphäre und Klima Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Dr. Jeroen Sonke (Geosciences Environnement Toulouse) France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Dr. David Amouroux, Université de Pau et des Pays de l'Adour, CNRS France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
ICOBTE 2017 Talk given at a conference Sulfur, selenium and iodine speciation in rainwaters from high altitude locations 16.07.2018 Zürich, Switzerland Winkel Lenny; Suess Elke;
Se2017 Talk given at a conference Selenium speciation in rainwater from high altitude locations 13.08.2017 Stockholm, Sweden Winkel Lenny; Suess Elke;
32nd International Conference on Environmental Geochemistry and Health (SEGH) Talk given at a conference Temporal trends in concentrations and speciation of sulfur and selenium in rainwater 04.07.2016 Brussels, Belgium Suess Elke; Winkel Lenny;
26th Goldschmidt Conference Talk given at a conference Investigating Biogenic Sources and Speciation of Sulfur and Selenium in Rainfall 26.06.2016 Yokohama, Japan Winkel Lenny;


Communication with the public

Communication Title Media Place Year
Media relations: print media, online media Selen: Eine Spurensuche in hochalpiner Umgebung Website ETH-Institut German-speaking Switzerland 2019

Awards

Title Year
European Association of Geochemistry (EAG) Distinguished Lecturer 2017 2017

Abstract

Dietary Iodine deficiency is a global problem that is estimated to affect nearly 2 billion people worldwide. A key factor causing global iodine deficiency disorders (IDD) is the wide-scale presence of surface environments, including agricultural soils and their produce, that are low in this essential element. Rainfall has been proposed to be a main source of iodine supply to soils and iodine is ultimately derived from marine environments, where volatile iodine compounds are emitted into the atmosphere via abiotic and biotic processes. Even though rainfall is believed to a main source of iodine to terrestrial environments, the spatial relationships between rainfall and soil iodine distributions as well as the underlying mechanism of soil iodine uptake from rainfall and soil retention are still largely ununderstood. Therefore, the proposed study aims to investigate the relations of iodine soil input via rainfall and the role of soil organic carbon for its retention. Previously, excellent research has been done to investigate the link between soil organic matter and halogen retention, but the interaction between rainfall as a source and organic matter retention in soils is largely unexplored. This study will compare iodine dynamics in rainfall and organic-rich soils (including ombrotrophic peat) in both marine-influenced and continental areas along spatial gradients in precipitation and geochemical variables. The main objective of the proposed study is to investigate the interplay between rainfall as a potential input mechanism for iodine in soils and soil organic carbon as a main factor for iodine retention. The main research questions of the proposed project are:•In marine-influenced areas it can be assumed that iodine is sufficiently supplied by marine-derived precipitation, where does the iodine come from in more continental environments?•How is iodine bound in the soil and what is the influence of different amounts and forms of organic matter on the retention of iodine in soils?•Is there a difference between the relationships between soil organic matter and iodine in marine-influenced and continental areas?Environmental studies on iodine in are challenging and therefore we will include other elements in our analyses, of which bromine is the most important. The proposed research activities are organized in two subprojects (A and B). Subproject A largely focuses on in-depth peat and soil studies and investigates the relationship between iodine and bromine and soil organic matter. Planned activities include peat and soil sampling, detailed investigations on iodine and bromine accumulation in organic matter and solid-state speciation of iodine and bromine by means of X-Ray Absorption Spectroscopy studies. Subproject B will investigate speciation of iodine and bromine in surface/pore waters from peat bogs and soils and rainwater in the two different settings, i.e. marine marine-influenced and continental areas. Planned activities include collection of samples and bulk iodine and bromine and speciation analyses. Another main task is the use of a multidimensional isotopic approach, including stable bromine isotope analysis, which is a promising new technique to study marine sources.The proposed research will give important insights in the factors that control iodine inputs and retention in soils in marine-influenced and continental soils. More specifically, subproject A will lead to a better understanding of the relationships between iodine and soil organic matter and subproject B will contribute to fill gaps in current knowledge on the atmospheric pathways that supply iodine to soil systems. The improved understanding of the factors leading to iodine-deficient environments are of key importance in the global combat against micronutrient deficiencies.
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