Adsorption of Phenol and Toluene from the Gas Phase
and Aqueous Solutions on Cellulose
M. I. Voronova and A. G. Zakharov
Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russia
Received July 17, 2008
Abstract—Adsorption of toluene and phenol from the gas phase and aqueous solutions on various celluloses
ISSN 1070-4272, Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 3, pp. 402–405. © Pleiades Publishing, Ltd., 2009.
Original Russian Text © M.I. Voronova, A.G. Zakharov, 2009, published in Zhurnal Prikladnoi Khimii, 2009, Vol. 82, No. 3, pp. 410–413.
Sorption from solutions on polymeric materials
forms the basis of many physicochemical processes. In
particular, these are processes associated with the vital
activity of a living body, which depends on the
capability to sorb through respiratory and digestive
organs and through skin various substances that
stimulate or prevent normal functioning of the body.
Industrial processes also involve accumulation of
certain compounds and utilization of by-products.
Polymeric sorbents exhibit certain specific features
governed by their properties and structure. On the
molecular level, these materials are mixtures of
macromolecules of different lengths and irregular
structure. The supramolecular structure of the
polymers is characterized by the existence of areas
significantly differing in the extent of macromolecular
ordering. To a first approximation, sorbing amorphous
regions and sorption-inactive crystallites can be
Despite a large number of papers dealing with
sorption properties of polymers, the mechanism of the
interaction of polymers with mixtures of low-
molecular-weight liquids (solutions or emulsions) is
still poorly understood.
In this paper we consider sorption of two aromatic
compounds differing in the nature of substituents
(hydrophilic in phenol, hydrophobic in toluene) from
the gas phase and aqueous solutions on various
celluloses differing in the ratio of amorphous and
To obtain adsorption isotherms, we used the
isothermal saturation method. The concentration of
organic substances in water before (c
) and after (c
sorption was determined by UV spectrophotometry.
The adsorption value c
was calculated by the equation
are the initial and equilibrium sorbate
concentrations, respectively (M); V, solution volume
(l); and m, adsorbent weight (g).
To determine the water retention, a wet cellulose
sample was centrifuged at 8000 rpm for 15 min .
Such treatment yields a cellulose sample with the
water content virtually equal to that obtained by
sorption of water from the gas phase. The water-
retaining power (%) was determined by the formula
is the dry cellulose weight (g) and m
cellulose weight after centrifugation (g).
Adsorption of toluene and phenol from the gas
phase was monitored gravimetrically. A cellulose
sample was placed in a desiccator with the atmosphere
saturated with toluene or phenol vapor. The equilib-
rium was attained within 17–35 days.
The physicochemical properties of the celluloses
used as adsorbents and the maximal values of phenol
OF SYSTEMS AND PROCESSES