Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 4, pp. 581−586.
Pleiades Publishing, Ltd., 2009.
Original Russian Text
A.S. Lozhkomoev, G.G. Savel’ev, N.V. Svarovskaya, M.I. Lerner, 2009, published in Zhurnal Prikladnoi Khimii, 2009, Vol. 82, No. 4,
OF SYSTEMS AND PROCESSES
Adsorption of Negative Eosin Ions, Tannin Molecules, and Latex
Spheres on Aluminum Oxohydroxide Nanoﬁ bers
A. S. Lozhkomoev, G. G. Savel’ev, N. V. Svarovskaya, and M. I. Lerner
Tomsk Polytechnic University, Tomsk, Russia
Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Tomsk, Russia
Received December 9, 2007
Abstract—Adsorption of eosin and tannic acid by a new filter-sorption material was studied. This material has
the form of polymeric microfibers having on their surface immobilized particles of the adsorbent, aluminum
oxohydroxide nanofibers. The charge and geometrical conditions of adsorption were calculated. The results
of these calculations are in agreement with the ion-exchange mechanism for eosin and tannin, and with the
electrostatic mechanism for latex spheres.
One of the most topical areas of research aimed to
create nanomaterials is development of new highly ﬁ lled
ﬁ brous and lamellar sorption-active ﬁ lter materials .
To materials of this kind belongs a sorbent based on
aluminum oxohydroxide nanoparticles formed in hy-
drolysis of electric-explosion aluminum nanopowders
[2–4]. The main disadvantage of this sorbent is the high
hydrodynamic resistance created by the sorbent bed. The
solution to this problem was found when aluminum oxo-
hydroxide nanoparticles could be ﬁ xed on the surface of
microﬁ bers. As a result, ﬁ lter-sorption materials for water
puriﬁ cation to remove various contaminants, including
those of microbiological origin, have been obtained [5–9].
These materials are unwoven cloths with a thickness not
exceeding 2 mm, in which microﬁ bers create a porous
skeleton with pore sizes providing a high ﬁ ltration rate.
Sorbent nanoﬁ bers, which are, as a rule, contained in an
amount of 10–60 wt %, provide high sorption properties
of the material.
However, the model of the structure and operation of
the ﬁ lter [5–9] is qualitative: the adsorption of negatively
charged species, including macromolecular organic an-
ions, is attributed to the positive charge on the adsorbent
surface. The model can be qualitatively substantiated by
the fact that electropositive ﬁ lter materials, e.g., mem-
branes with a modiﬁ ed charge, can be successfully tested
with a solution of an anionic dye (Methanyl Yellow) or
with a suspension of latex microspheres with an appro-
At the same time, it has been noted  that there is no
correlation between the surface potential and the adsorp-
tion capacity of a ﬁ brous ﬁ lter for MS2 bacteriophage,
and the communications cited above did not specify the
adsorbate–adsorbent charge balance.
Previously, monodisperse latex spheres (diameter
33 nm) modeling virus properties has been used to study
the sorption properties of a ﬁ lter material containing alu-
minum oxohydroxide nanoﬁ bers . However, analysis
of the adsorption by this technique is made nephelo-
metrically in the dynamic mode under nonequilibrium
conditions, which gives no way of obtaining data for
construction of an adsorption isotherm. For this reason,
in particular, attempts have been made to use macromo-
lecular compounds, instead of latex spheres, in modeling
of the virus adsorption. For example, these are anionic
dyes determinable by photocolorimetry, which enables
studies in both the dynamic and static modes.
The goal of this study was to obtain quantitative data
on the adsorption of macromolecular organic substances,
tannin and eosin, and latex spheres modeling properties
of viruses. These data are necessary both for determin-
ing the possibility of modeling the adsorption of viruses