Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 7, pp. 1288−1291.
Pleiades Publishing, Ltd., 2011.
Original Russian Text © E.V. Derbisher, E.N. Ovdienko, V.E. Derbisher, 2011, published in Zhurnal Prikladnoi Khimii, 2011, Vol. 84, No. 7, pp. 1218−1220.
Polymer Sorbents with Hydrazide Moieties
for Water Treatment Applications
E. V. Derbisher, E. N. Ovdienko, and V. E. Derbisher
Volgograd State Technical University, Volgograd, Russia
Received July 5, 2010
Abstract—The possibility was explored for synthesizing sorbents containing hydrazide moieties, suitable
wastewater and water treatment applications. Waste polymers containing ester groups served as the starting
material. Polymer derivatives containing hydrazide moieties in the side chain (poly(meth)acrylic acid hydrazides
[1–3] and their copolymers with vinyl alcohol ) were tested as precursors for synthesis of polymers with
oxydiazole rings [5, 6], modiﬁ ers of cement compositions [7, 8], textile ﬁ nishing agents [9–11], and supports for
RNA immobilization .
In the practical context, however, such syntheses
involve the use of hydrazine and hydrazine hydrate
belonging to class 1 hazardous materials, which creates
certain obstacles to implementation of the corresponding
There exists a reference  to polymers containing
hydrazide moieties and to possible prospects for their
application in development of sorbents, in particular of
those based on polyacrylonitrile ﬁ bers, to be used for
removal of heavy metal ions from contaminated water.
Here, we prepared and examined such sorbents.
The main drawback suffered by sorbents based
on polymeric carboxylic acid hydrazides (PCAHs)
is the solubility in water, which strongly limits their
application for water treatment purposes. This drawback
can be eliminated by (1) partial cross linking of the
PCAHs with polyfunctional reagents or by physical
means (heating, irradiation) , (2) immobilization,
e.g., via PCAH synthesis on an inert support surface,
and (3) modiﬁ cation of water-insoluble polymers
(which remain insoluble after modiﬁ cation) comprising
functional groups that can be hydrazinolyzed.
The immobilization procedure has not been
implemented as yet, and the third-named procedure is
the subject of this study.
As the initial water-insoluble polymer for synthesis
of sorbents containing hydrazide groups we used MABS
(also referred to as ABS – transparent), which is a large-
tonnage random copolymer of methyl methacrylate,
acrylonitrile, butadiene, and styrene.
A fairly wide range of items manufactured from
MABS, including external components of cars, TV sets,
phones, computers, and plumbing ﬁ xtures, suggests
generation of abundant secondary MABS (whose
utilization is addressed in this study as well), which can
be used for sorbent preparation.
Hydrazinolysis of secondary MABS was carried
out as follows. The starting material (used up external
components) was crushed in a mixer, and the resulting
product containing 25–35% methacrylate moieties was
fractionated. The fraction with particle size of 0.3–
3 mm was charged into a reactor ﬁ tted with a stirrer and
a reﬂ ux condenser and poured with a twofold excess (by
weight) of hydrazine hydrate. Next, hydrazine sulfate
was added in amount of 2% of the weight of hydrazine
hydrate and also an equal amount of sodium hydroxide,
after which the resulting mixture was heated to boiling
(~120°C) and subsequently boiled with stirring for ca.