1070-4272/05/7808-1266 + 2005 Pleiades Publishing, Inc.
Russian Journal of Applied Chemistry, Vol. 78, No. 8, 2005, pp. 1266!1269. Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 8, 2005,
Original Russian Text Copyright + 2005 by Bondarenko, Boichinova.
AND ION-EXCHANGE PROCESSES
Sorption of Some Metal Ions on Inorganic Electron
and Ion Exchangers Based on Zirconium(IV)
T. S. Bondarenko and E. S. Boichinova
St. Petersburg State Technological Institute, St. Petersburg, Russia
Received July 19, 2004; in final form, July 2005
Abstract-Conditions of sorption of nonferrous metal ions on inorganic electron and ion exchangers based
on zirconium(IV) were analyzed. The sorption capacity was evaluated as influenced by pH, concentration,
and temperature of the contacting solutions and nature and chemical composition of the ion exchanger.
Sorbents operating under severe conditions are
required in many branches of science and industry.
In contrast to organic sorption materials, inorganic
sorbents show high chemical resistance to aggressive
solutions and high stability at elevated temperatures
and pressures or under irradiation. Therefore, a study
of the properties of these materials as influenced
by various operation factors is rather urgent. Syn-
thesis of inorganic sorbents based on zirconium3oxy-
gen matrix involves formation of polymers with Zr3
O3Zr units on adding polybasic acids or their salts
in aqueous solutions of zirconium(IV). The residues
of polybasic acids link with zirconium3oxygen chains
to form simple or complex functional groups exhibit-
ing ion-exchange, redox, and some other properties.
In this study, we examined the effect of some fac-
tors on the ion-exchange properties of inorganic
electron and ion exchangers (EIEs) based on zirco-
nium(IV), with functional groups containing phos-
phorus(V) and molybdenum(VI) (zirconium phospho-
molybdate, ZPM), tungsten(VI) and vanadium(V)
(zirconium tungstovanadate, ZTV , and silicon(IV)
and molybdenum(VI) (zirconium silicomolybdate,
ZSM ). The ion-exchange properties of these sor-
bents are due to the residues of polybasic acids of
molybdenum(VI), phosphorus(V), tungsten(VI), and
silicon(IV) and hydroxy groups, and the redox prop-
erties are associated with the formation of the cor-
responding heteropoly acid residues in the course
of synthesis. In this study, we analyzed only the ion-
exchange power of EIEs in comparison with hydrated
zirconium dioxide (HZD) . The structure of EIE
based on zirconium(IV), molybdenum(VI), and phos-
phorus(V) is given below.
It is known that the sorption properties depend not
only on the nature and composition of a sorbent, but
also on the sorption conditions, such as the solution
pH, ionic composition of the solution (nature of an-
ions, impurity electrolytes), contact time (sorption
kinetics), temperature, etc.
All the sorbents were prepared from zirconium
oxynitrate by the procedures given elsewhere .