Published 2006 | Version v1
Journal article Metadata-only

Behaviour of Cs, Np(V), Pu(IV), U(VI) in pore waters of bentonite

Creators

  • 1. RAN, Inst. Fizicheskoj Khimii i Ehlektrokhimii im. A.N. Frumkina, Moscow (Russian Federation)
  • 2. Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Khimicheskij Fakul'tet, Kafedra Radiokhimii, Moscow (Russian Federation)

Description

Sorption of Cs, Np(V), Pu(IV), U(VI) by bentonite from solutions is studied. Physicochemical forms of radionuclides in liquid phase and sorption mechanism are determined. It is shown that Cs is sorbed through ion-exchange mechanism. Adsorption of actinides is determined by interaction with bentonite surface hydroxyl groups in the case of pH>5; when pH value is <5 ion exchange and complexation are competitive processes. Reduction of Np(V) and U(VI) up to Np(IV) and U(IV) by Fe(II) in solution is proved by solvent extraction method

Abstract (Russian)

Исследована сорбция Cs, Np(V), Pu(IV), U(VI) бентонитом из растворов. Определены физико-химические формы нахождения радионуклидов в жидкой фазе, определены механизмы сорбции. Показано, что Cs сорбируется по ионообменному механизму. Адсорбция актинидов при pH>5 определяется взаимодействием с поверхностными гидроксильными группами бентонита, а при pH<5 ионный обмен и комплексообразование являются конкурирующими процессами. Экстракционным методом доказано восстановление Np(V) и U(VI) до Np(IV) и U(IV) в растворе соединениями Fe(II)

Additional details

Additional titles

Original title (Russian)
Поведение Cс, Нп(В), Пу(IV), У(VI) в поровых водах бентонита

Publishing Information

Journal Title
Radiokhimiya
Journal Volume
48
Journal Issue
5
Journal Page Range
p. 437-441
ISSN
0033-8311
CODEN
RADKAU

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
38038648
Subject category
S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ADSORPTION; BENTONITE; CESIUM COMPOUNDS; CHEMICAL STATE; DISTRIBUTION FUNCTIONS; KINETICS; NEPTUNIUM COMPOUNDS; PH VALUE; PLUTONIUM COMPOUNDS; POROUS MATERIALS; URANIUM COMPOUNDS; WATER
Descriptors DEC
ACTINIDE COMPOUNDS; ALKALI METAL COMPOUNDS; CLAYS; FUNCTIONS; HYDROGEN COMPOUNDS; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MATERIALS; MINERALS; OXYGEN COMPOUNDS; SILICATE MINERALS; SORPTION; TRANSURANIUM COMPOUNDS

Optional Information

Notes
16 refs., 5 figs., 1 tab.