Russian Journal of Applied Chemistry, 2010, Vol. 83, No. 1, pp. 44−49.
Pleiades Publishing, Ltd., 2010.
Original Russian Text
S.V. Kovalev, S.I. Lazarev, P.A. Chepenyak, 2010, published in Zhurnal Prikladnoi Khimii, 2010, Vol. 83, No. 1, pp. 47−51.
OF SYSTEMS AND PROCESSES
Investigation of Sorption Capability of Reverse Osmosis
Membranes in Aqueous Solutions of Iron,
Zinc, and Sodium Sulfates
S. V. Kovalev, S. I. Lazarev, and P. A. Chepenyak
Tambov State Technical University, Tambov, Russia
Receives January 22, 2008
Abstract—Experimental data and equations to calculate a sorption capacity of reverse osmosis membranes
MGA-95, ESPA and OPM-K in aqueous solutions of iron, zinc and sodium sulfates were obtained and analyzed
depending on temperature and concentration of the solution.
Waste water from chemical, petrochemical and related
industries are the main impurities polluting the water,
which are not removed mechanically and oxidized with
the aid of biological treatment . Membrane processes
for treatment of wastewater of industrial enterprises have
several advantages compared with traditional methods
of wastewater treatment. On the basis of these processes
opportunities of simultaneous industrial water treatment
and water recycling along with recovery of valuable
components are developed .
A diffusion coefﬁ cient of a solute in the polymer
membrane and a distribution coefﬁ cient of solute between
the membrane and solution, which are included as
independent parameters in the expression for calculating
the coefficient of detention, are used in studying
kinetic characteristics of membrane separation, such
as the coefﬁ cient of detention by the reverse osmosis
The raw sorption materials in the experimental studies
of the distribution coefﬁ cient were batch membranes
MCA-95 and OPM-K manufactured by Closed Joint
Stock Co. “Vladipor.” The structure of membrane
MCA-95 is a porous polymer material based on cellulose
acetate on the carrier (non-woven polypropylene, woven
and nonwoven lavsan), membrane OPM-K, aporous
polymer ﬁ lms based on polyamide carrier (non-woven
polypropylene, woven and nonwoven lavsan). The
structure of membrane ESPA of “Hydranautics” Co. on
the basis of a composite polyamide is an analog of the
domestic polyamide composite membranes. The main
characteristics of the domestic and foreign membranes
are given in Table. 1.
The mechanism of sorption from solutions often
is understood based on the regularities derived for the
gas phase with adding or restricting conditions speciﬁ c
to the liquid phase. The liquid sorption is much more
complicated than that of the gases because the interaction
of membranes with sorbed substance, with the solvent
(water) and also between sorbed substance and solvent
should be taken into account.
Table 1. The main characterisitcs of the examined