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Modification of pillared layered clays for scavenging radiostrontium from acidic aqueous environments

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Modification of pillared layered clays for scavenging radiostrontium from acidic aqueous environments (EN)
Gangas, N.-H.
Karamanis, D. T.
Assimakopoulos, P. A.
Papachristodoulou, C. A.
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
2020-02-11
A Pillared Layered Clay (PILC), code-named FREZEN, has been developed as a potential antidote for trapping radiostrontium in the gastrointestinal tract of ruminants. The ion exchange behaviour of FREZEN has been studied, with particular emphasis on Sr+2 exchange in acidic solutions. As for most sorbents and ion ex changers, strontium uptake by FREZEN remains sufficiently good over a pH range of 5-11, but a sharp diminution is observed at pH values below 4. Furthermore, at lower pH values, hydronium ions (H3O+) successfully compete with strontium cations already uptaken by FREZEN. An extended "back-exchange" effect, characterized by fast kinetics, is thus observed. In order to impede the diffusion and prevalence of Η3Ο+, a modification of the microporous space in FREZEN has been carried out via intercalation of suitable organic molecules. Work currently underway reveals that this approach is capable of improving the performance properties of the PILC. Experimental results with glycerol as the intercalated organic agen will be presented and discussed. (EN)
Annual Symposium of the Hellenic Nuclear Physics Society
English
Hellenic Nuclear Physics Society (HNPS) (EN)
2654-0088
2654-007X
Annual Symposium of the Hellenic Nuclear Physics Society; Τόμ. 9 (1998): HNPS1998; 331-341 (EL)
HNPS Advances in Nuclear Physics; Vol. 9 (1998): HNPS1998; 331-341 (EN)
Πνευματική ιδιοκτησία (c) 2020 C. A. Papachristodoulou, P. A. Assimakopoulos, N.-H. Gangas, D. T. Karamanis (EL)
Hellenic Nuclear Physics Society
Annual Symposium of the Hellenic Nuclear Physics Society
Oral contributions



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