Abteilung für Reaktiven Transport
In der Abteilung Reaktiver Transport untersuchen wir die Heterogenität der Reaktivität von Materialoberflächen, insbesondere bei Sorptions- und Lösungsreaktionen. Wir verwenden experimentelle und numerische Methoden zur Quantifizierung und Vorhersage von Oberflächenreaktionsraten. Transport in komplexen porösen Materialien ist ein weiterer wichtiger Aspekt unserer Arbeit. Wir entwickeln konservative und reaktive Radionuklidtracer mit Hilfe unseres Zyklotronlabors und wenden die Positronen-Emissions-Tomographie (PET) an. Wir entwickeln und verwenden numerische Methoden zur Transportanalyse auf der Porenskala und darüber hinaus. Unsere Forschung wird durch Anwendungen in der nuklearen Sicherheitsforschung motiviert und vorangetrieben und stellt wichtige Verbindungen zu den Erd-, Umwelt- und Materialwissenschaften her.
Neuste Publikation
Follow me: Mechanistic insights into Eu(III) uptake, translocation and speciation in hydroponically grown Sand oat (Avena strigosa)
Klotzsche, M.; Drobot, B.; Schymura, S.; Vogel, M.; Raff, J.; Stumpf, T.; Steudtner, R.
Abstract
As rare earth elements gain strategic importance, knowledge of their environmental pathways becomes increasingly needed. In particular, mechanistic insight into plant uptake of rare earth elements informs both risk assessment and mitigation strategies in case of environmental contaminations and modern green applications such as biomining. In this study, we addressed the mobility, speciation and deposition of Eu(III), serving as surrogate for trivalent lanthanides, within the Poaceae Sand oat (Avena strigosa) from both microscopic and macroscopic perspectives. Using hydroponic bioassociation and extraction experiments, we tracked the metal’s pathway within the plant. A combination of (micro)spectroscopic and chromatographic techniques, mass spectrometry, autoradiography and iterative factor analysis enabled us to develop a comprehensive understanding of Eu(III) speciation and its influence on translocation of lanthanides within plants. The results show that Eu(III) is absorbed by epidermal cells and root tips, but predominantly the apoplast, in which Eu(III) is subjected to cell wall binding and phosphate precipitation. Internalized Eu(III) is bound to organophosphate ligands in the cell interior. Xylem loading occurs within less than one hour and translocation to the shoots is achieved by complexes with oxalate, citrate and malate. The use of radioactive 152Eu(III) as tracer revealed that the majority of the metal remains in the roots, while a minor portion is deposited uniformly in the non-vascular tissue of both young and mature leaf lamina. These findings advance our mechanistic comprehension of rare earth element transport, the chemical binding environments encountered in plants and lay the foundation for environmental risk assessments and phytomanagement for metal-enriched areas.
Keywords: Chemical microscopy; Autoradiography; Hydroponics; Bioassociation; Xylem sap; Rare earth elements; Laser spectroscopy; Liquid chromatography; Phytoremediation; Plants
Verknüpfte Publikationen
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Data publication: Follow me: Mechanistic insights into Eu(III) uptake …
ROBIS: 41086 HZDR-primary research data are used by this (Id 41428) publication -
Data publication: Follow me: Mechanistic insights into Eu(III) uptake …
RODARE: 3627 HZDR-primary research data are used by this (Id 41428) publication
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Science of the Total Environment 988(2025), 179849
DOI: 10.1016/j.scitotenv.2025.179849
Permalink: https://www.hzdr.de/publications/Publ-41428
Team
Leitung/ Sekretariat | |||||
Name | Geb./Raum | +49 351 260 | Position/Aufgaben | ||
---|---|---|---|---|---|
Prof. Dr. Cornelius Fischer | L9.3/212 | 4660 | c.fischer![]() | Abteilungsleiter | |
Katrin Gerstner | L9.3/217 | 4601 | k.gerstner![]() | Sekretariat / Administration Reaktiver Transport / Experimentelle Neuroonkologische Radiopharmazie | |
Nadja Pedrosa Gil | L9.3/221 | 4690 | n.pedrosa-gil![]() | Administrative Mitarbeiterin Reaktiver Transport Administrative Mitarbeiterin Experimentelle Neuroonkologische Radiopharmazie | |
Mitarbeiter | |||||
Name | Geb./Raum | +49 351 260 | Position/Aufgaben | ||
Sieglinde Holzknecht | L9.3/222 | 4664 | s.holzknecht![]() | Doktorandin | |
Dr. Johannes Kulenkampff | L9.3/202 | 4663 | j.kulenkampff![]() | Wissenschaftlicher Mitarbeiter | |
Dr. Marcel Lindemann | L9.3/318 | 4671 | m.lindemann![]() | Wissenschaftlicher Mitarbeiter | |
Dr. habil. Holger Lippold | L9.3/401 | 4672 | h.lippold![]() | Wissenschaftlicher Mitarbeiter | |
Jing Liu | L9.3/211 | 4692 | j.liu![]() | Doktorandin | |
Dagmar Lösel | L9.3/402 | 4673 | d.loesel![]() | Chemisch-technische Assistentin | |
Jann Schöngart | L9.3/222 | 4658 | j.schoengart![]() | Doktorand | |
Claudia Schößler | L9.3/402 | 4674 | c.schoessler![]() | Chemielaborantin | |
Weitere Mitarbeiter | |||||
Name | Geb./Raum | +49 351 260 | Position/Aufgaben | ||
Dr. Karsten Franke | L9.3/318 | 4629 | k.franke![]() | Wissenschaftlicher Mitarbeiter |