AND POLYMERIC MATERIALS
Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 8, pp. 1289−1295.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © T.G. Ermakova, L.P. Shaulina, N.P. Kuznetsova, G.V. Ratovskii, I.N. Soboleva, A.S. Pozdnyakov, G.F. Prozorova, 2012, published
in Zhurnal Prikladnoi Khimii, 2012, Vol. 85, No. 8, pp. 1356−1363.
Sorption Recovery of Noble Metal Ions with a Copolymer
of 1-Vinyl-1,2,4-triazole with Acrylonitrile
T. G. Ermakova
, L. P. Shaulina
, N. P. Kuznetsova
, G. V. Ratovskii
, I. N. Soboleva
A. S. Pozdnyakov
, and G. F. Prozorova
Favorskii Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia
Irkutsk State University, Irkutsk, Russia
Received June 26, 2012
Abstract—Suspension copolymerization of 1-vinyl-1,2,4-triazole with acrylonitrile was used to synthesize an
insoluble heat-resistant copolymer possessing sorption activity. An effect of the nature and concentration of acids
on the recovery of noble metal ions Pt(IV), Pd(II), Au(III), and Ag(I) was observed. The kinetic and sorption
characteristics of the copolymer were evaluated and the possibility of its application was assessed. IR and Ra-
man spectroscopies were used to elucidate the mechanism of interaction of the copolymer with noble metal ions.
The increasing use of noble metals makes topical
the introduction of sorption methods for their recovery
into hydrometallurgical processes and processing of
secondary raw materials, “lean” products, and catalysts.
Sorption methods solve technological problems and
those of the analytical chemistry of noble metals [1, 2].
A wide assortment of complex-forming sorbents with
various polymeric matrices and functional groups that
can be used in concentration and recovery of noble met-
als is known. Most of nitrogen- and sulfur-containing
sorbents are anion exchangers that selectively recover
noble metal ions from acid solutions [3–9].
It has been shown that complex-forming polymers
based on the nitrogen-containing heterocyclic monomer
1-vinyl-1,2,4-triazole are effective sorbents of noble
metals [7, 9–11].
Copolymers containing vinyl-triazole and acryloni-
trile nits have been ﬁ rst used to create new complex-
forming polymeric sorbents. Particular attention is
presently attracted by sorbents based on acrylonitrile
Our study is concerned with the sorption character-
istics of a porous heat-resistant copolymer of 1-vinyl-
1,2,4-triazole and acrylonitrile toward platinum(IV),
palladium(II), gold(III), and silver(I) ions.
We recorded IR and Raman spectra of the starting
and metal-containing copolymers with a Bruker IFS-
25 spectrometer and Varian Resolutions Pro 3100 FT-
IR instrument. TGA curves of copolymer samples
were recorded with an MOM Q-1500D derivatograph
(Hungary) at a heating rate of 5 deg min
. The sorption
characteristics of the copolymer were determined in the
static mode. We used standard solutions of platinum(IV),
palladium(II), and gold(III) chlorides (in 3 M HCl, c
1.0 mg mL
) and silver(I), copper, iron, cobalt, nickel,
and zinc nitrates (c
= 1.0 mg mL
), acidiﬁ ed to pH
1.0. We studied the sorption characteristics toward the
cation form of silver and anion chloride complexes of
platinum(IV), palladium(II), gold(III), and silver(I) in
hydrochloric, sulfuric, and nitric acid solutions. The
content of platinum(IV) in solution was determined by
a spectrophotometric method from the reaction in which
chloride-tin complexes were formed . The content
of other metal ions in solution was monitored by the
atomic-absorption technique. All determinations were
made with calibration plots.
1-Vinyl-1,2,4-triazole (VT) was synthesized and
puriﬁ ed by the previously developed method ;