Research project Calixarene-Radiochemistry
The BMBF supports the network project „Multifunctional chelating agents with N, O, S-donor functions for d- and f-group elements: synthesis, complex formation, structure and transportation behaviour“ within the tender "Retention of know-how into radiation research“. We conduct one sub-project with the title
|Fig. 1: Synthesis (A), complexation (B, C) and distribution behaviour (D) of a chelating agent with radionuclides|
|picture: FWRT, Dr. Mansel|
Control of the migration behavior of radionuclides by means of calixarene chelate complexes
For the safety assessment of radioactive waste in subterranean waste repositories the behaviour of sorption and complex formation of long-lived radiotoxic heavy metals (e.g. 60Co2+, 63Ni2+, 90Sr2+, 107Pd2+, 151Sm3+) under conditions near to nature needs to be clarified. The aim of this project is to analyse the migration behaviour of radionuclides in potential rock formations under ambient conditions by means of macrocyclic, multifunctional chelating agents.
This project is an interdisciplinary working network consisting of Helmholtz-Zentrum Dresden-Rossendorf, the Leipzig University and the Technical University Dresden.
The used chelating agents are based on calixarenes, which show a cooperative/anti-cooperative binding behaviour towards metal ions. Their selectivity in binding radionuclides and the migration behaviour of the radionuclide-calixarene-complexes is influenced by specific synthesis of these calixarenes. The purpose of this project is to immobilise the radionuclide-calixarene-complexes in rock formations.
The radiotracer technique allows a detailed description of the interaction processes in the ternary system radionuclide/calixarene/rock formation down to nanomolar concentrations. In the Reactive Transport Division of the Helmholtz-Zentrum Dresden-Rossendorf, these interactions are performed in batch and column studies.
Dr. Alix Günther (HZDR, project head)
Maria Poetsch (HZDR, Reactive Transport Division)
Prof. Dr. Berthold Kersting (University of Leipzig, Faculty of Chemistry and Mineralogy)
Sebastian Haupt (University of Leipzig, Faculty of Chemistry and Mineralogy)
René Schnorr (University of Leipzig, Faculty of Chemistry and Mineralogy)