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Sorption of radionuclides on the rocks of the exocontact zone of Nizhnekansky granitoid massif

Published online by Cambridge University Press:  16 February 2017

Irina Vlasova ,
Vladimir Petrov ,
Natalia Kuzmenkova ,
Artem Kashtanov ,
Vladislav Petrov ,
Valery Poluektov ,
Stepan Kalmykov  and
Jörg Hammer
Irina Vlasova*
Affiliation:
Department of Chemistry, Lomonosov MSU, Moscow, Russia
Vladimir Petrov
Affiliation:
Department of Chemistry, Lomonosov MSU, Moscow, Russia
Natalia Kuzmenkova
Affiliation:
Department of Chemistry, Lomonosov MSU, Moscow, Russia
Artem Kashtanov
Affiliation:
Department of Chemistry, Lomonosov MSU, Moscow, Russia
Vladislav Petrov
Affiliation:
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of RAS, Moscow, Russia
Valery Poluektov
Affiliation:
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of RAS, Moscow, Russia
Stepan Kalmykov
Affiliation:
Department of Chemistry, Lomonosov MSU, Moscow, Russia National Research Center “Kurchatov Institute”, Moscow, Russia
Jörg Hammer
Affiliation:
BGR, Geozentrum Hannover, Hannover, Germany
*
*(Email: ivlas@radio.chem.msu.ru)
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Abstract

Study of sorption behavior of radionuclides toward five rock samples drilled in the deep-well R12 in the exocontact zone of Nizhnekansky granitoid massif (“Eniseysky” area) in the range of depth 166 m – 476 m was carried out. The sorption kinetics and Kd values of the long-lived radionuclides of different chemical behavior 137Cs, 226Ra, 79Se, 237+239Np, 239,240Pu, 241,243Am were determined. Experiments were performed under the conditions that are relevant for the future high level waste disposal (atmosphere; composition, pH and Eh of the solutions). Digital radiography demonstrated heterogeneous sorption of all the investigated radionuclides and revealed phases with higher sorption ability. It was established that sorption of metal cations is fast and reaches steady state in a few hours while Se in the form of selenate-ion sorbs insignificantly.

Keywords

adsorptionactinidewaste management
Type
Articles
Information
MRS Advances , Volume 1 , Issue 61: Scientific Basis for Nuclear Waste Management XXXIX , 2016 , pp. 4061 - 4067
Copyright
Copyright © Materials Research Society 2017 

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References

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