Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 9, pp. 1371−1375.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © E.A. Tin’gaeva, I.S. Glushankova, M.V. Zil’berman, V.V. Milyutin, 2012, published in Zhurnal Prikladnoi Khimii, 2012, Vol. 85, No. 9,
Sorption and Kinetic Properties of Radiocesium-Selective
E. A. Tin’gaeva, I. S. Glushankova, M. V. Zil’berman, and V. V. Milyutin
Perm National Research Polytechnic University, Perm, Russia
Received June 8, 2012
Abstract—Comparative analysis of the sorption and kinetic properties was carried out for organomineral sorbents
synthesized by two routes: (1) from an organomineral suspension and (2) from aqueous-organic solutions.
At the present time, one of the major unsolved environ-
mental problems is that of treatment of liquid radioactive
waste (LRW). The highly diverse composition of LRW is
presented by uranium ﬁ ssion products and neutron activa-
tion products in structural materials. Among these products,
the most long-lived and radiotoxic isotopes are
Sr with half-lives of 30 and 29.1 yr, respectively .
Cesium and strontium radionuclides existing in solu-
tions in ionic forms are removed by sorption methods
using organic ion-exchange resins and inorganic sorbents
of various types as ion-exchange materials.
Today’s practice of LRW treatment by sorption meth-
ods is based on removal of radionuclides using pressure
and gravity ﬁ lters with ﬁ xed bed of granular sorbents.
The latter are typically prepared by the following routes:
coprecipitation of the active ingredient with silica gel ,
impregnation of the active ingredient into porous supports
, sol-gel synthesis [4, 5], and modiﬁ cation of natural
materials or solid waste [6–8].
In LRW treatment to remove cesium ions, granulated
composite materials based on transition-metal ferrocya-
nides and silica gel reached the most widespread appli-
cation. An example of such material is FS-10 composite
sorbent comprised of copper ferrocyanide and silica gel.
The proportion of the active ingredient in FS-10 does
not exceed 50%, which signiﬁ cantly reduces the sorption
capacity of the material and ﬁ lter cycle of the sorbent.
In this context, of much importance is the development
of granulation techniques for sorption materials, aimed to
use the active ingredient to its maximal potential.
Earlier studies have shown that, on the basis of
transition-metal ferrocyanides, it is possible to prepare
organomineral granulated sorbents containing up to 80
wt% active ingredient in the composition. Two routes
were developed for synthesis of organomineral sorbents
: (1) from an organomineral suspension and (2) from
The ﬁ rst route consists in dispersing a polymer solu-
tion containing a powdered inorganic sorbent in a liquid
well-miscible with the polymer solvent though unable to
dissolve the polymer.
The second route is based on addition into the polymer
solution of an aqueous solution of one of the reactants,
which is followed by its dispersing in a solution of the
other reactant. This procedure involves simultaneous
chemical reaction of the reactants, leading to the sorption
material, and solidiﬁ cation of the granules.
Here, we carried out comparative analysis of the
sorption and kinetic properties of organomineral sor-
bents prepared by the above-described procedures and
determined the optimal process parameters for synthesis
of cesium-selective sorbent.
The sorption, kinetic, and strength characteristics of
the organomineral sorbents were determined using chemi-
cal, atomic-absorption, and sieve analysis techniques.