Séminaire ISTerre

Retention potential of contaminants by (nano)magnetite in batch and microfluidic systems

mercredi 22 février 2023 - 10h00
EVGENIA MARIA PAPASLIOTI - ISTerre-Séminaire Post-doc (Café croissant à 9h45)
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The scientific community has greatly focused on finding innovative remediation techniques for the decontamination of drinking and waste water. (Nano)magnetite (Fe3O4) has been suggested to be a significant reductant for contaminants due to its ubiquity in the environment, and its great adsorption capacity and ability to retain metals on its surface owing to its high specific surface area. Its use has become an emerging technology for the treatment of contaminated land and water with a great potential to become an effective and low-cost alternative to conventional remediation techniques. So, this seminar gives me the opportunity to share my related research for the past two years under the framework of my Marie Curie postdoctoral (MSCA IF) project, during which I have studied the retention of contaminants by (nano)magnetite at both macro- and micro-scale. During the first part of my research, we have taken advantage of a concept of the circular economy, exploiting an existing waste from the steel industry that HYMAG’IN company has transformed into magnetite, to study the immobilisation of As, Sb, and U and provide new insights into a new ‘green’ route for the decontamination of drinking and wastewaters. The second part of my study was based on the idea that soil aggregates are systems ideal for the study of the (bio)geochemical reactions that control the mobility of the redox sensitive elements due to their small size and their spatial heterogeneity. Here we mimic those systems in a micro-scale format via the use of polymer aggregates (soil-inspired) and microfluidics to study time-dependent Sb reduction by nanomagnetite aggregates. Synchrotron X-ray Absorption Spectroscopy (XAS) is applied for the first time to such experimental systems to shed light into the role of nanomagnetite aggregates into the immobilization of Sb, as a novel remediation strategy.

Equipe organisatrice : Organisation labo

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

“Minimalist seismology”: studying earthquakes with sparse instrumentation

jeudi 17 septembre 2026 - 11h00

Mathieu Causse - ISTerre

Equipe organisatrice : Organisation labo

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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Stable‑to‑dynamic expansion of fault slipping area through fluid injection observed in laboratory experiments using a sub‑meter scale specimen

vendredi 18 septembre 2026 - 14h00

Takatoshi Ito  - Université de Tohoku, Japan

Equipe organisatrice : Mécanique des failles

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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Tectonics, Mantle Dynamics and Coupled Lithosphere-Mantle-Core Evolution of Earth and Other Rocky Worlds

jeudi 24 septembre 2026 - 11h00

Paul Tackley - ETH Zurich

Equipe organisatrice : Grands Séminaires ISTerre

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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Tectonics, Mantle Dynamics and Coupled Lithosphere-Mantle-Core Evolution of Earth and Other Rocky Worlds

jeudi 24 septembre 2026 - 11h00

Paul Tackley - ETH Zurich

Equipe organisatrice : Grands Séminaires ISTerre

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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Apport des expériences analogiques pour la modélisation et le suivi en temps réel de la propagation du magma en profondeur : Exemple du Rift Est Africain

jeudi 1er octobre 2026 - 11h00

Virginie Pinel - ISTerre

Equipe organisatrice : Organisation labo

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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A t-on encore besoin de plaques pour expliquer la tectonique de la vallée du Rhône et des Alpes Occidentales ?

vendredi 2 octobre 2026 - 11h00

philippe VERNANT - Geosciences Montpellier

Equipe organisatrice : Tectonique active et sismicité

Salle Dolomieu, Maison des Géosciences, 38400 Saint Martin d'Hères

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TBA

vendredi 2 octobre 2026 - 14h00

Hugo Boulze - 

Equipe organisatrice : Cycle sismique et déformations transitoires

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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TBA

vendredi 9 octobre 2026 - 11h00

Eric Beaucé - ISTerre

Equipe organisatrice : Cycle sismique et déformations transitoires

Salle Dolomieu, Maison des Géosciences, 38400 Saint Martin d'Hères

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TBA

vendredi 20 novembre 2026 - 11h00

Farzaneh Mohammadi - ENS Paris

Equipe organisatrice : Cycle sismique et déformations transitoires

Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères

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