Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 12, pp. 2186−2190.
Pleiades Publishing, Ltd., 2011.
Original Russian Text
A.M. Kudratov, Z.S. Salimov, S.S. Negmatov, 2011, published in Khimicheskaya Promyshlennost’, 2011, Vol. 88, No. 4, pp. 184−188.
PROCESSES AND DEVICES
OF CHEMICAL MANUFACTURES
Elaboration of the Efﬁ cient Technology of Contact Cleaning
of Wastewater from Mineral Oil
A. M. Kudratov
, Z. S. Salimov
, and S. S. Negmatov
Tashkent State Technical University, Tashkent, Uzbekistan
Institute of General and Inorganic Chemistry, Academy of Science of Uzbekistan, Tashkent, Uzbekistan
Received April 3, 2011
Abstract—Complex investigations on development of efﬁ cient technology of contact cleaning of wastewater from
oil pollution was carried out. This technology is based on processes of sorption, ion exchange, and subsequent
sedimentation. It is shown that modiﬁ ed sorbents prepared on the basis of cellulose, polygorskite, and activated
carbon effectively clean water from oil and oil products, where the degree of cleaning reaches over 98–99%. It is
found that the sorption coefﬁ cient (K
) increases with the increase in the dispersity of sorbents, and the consumption
of sorbent (g/100 ml) decreases.
Nowadays many cases of pollution of natural waters
of different sources by ions of metals, hydrocarbons as
oil or products of its processing, are known. This is a big
damage not only to the environment but also to all kinds
of living creatures.
It is necessary to note that the pollution by oil products
of water sources (lakes, rivers, seas, and oceans) mainly
occurs by accident. Factors of pollution are various,
mainly anthropogenic, i.e., human: at washing of trans-
portation means, cleaning of fuel and oil tanks, waste of
oil processing plants, accidents of marine means of oil
At spreading of oil ﬁ lm or oil products on the surface
of water the multimolecular layer, which can cover huge
surfaces, is formed. This depends on density character-
istics of oil and oil products.
Methods are known, which are widely used in practice
for cleaning of water from oil and oil products. The basis
of these methods is the sedimentation of oil products
by carbonized powder or by adding different dispersed
agents. These highly dispersed substances decompose the
thick oil layer in parts, which then should be collected.
The chemical and hygienical cleaning of water in that
case does not occur. It is necessary to remember that the
oil and its products belong to the difﬁ cultly oxidizable
organic substances. The oxidation of oil products in water
medium occurs very slowly.
In connection with the above mentioned facts complex
investigations on cleaning of water from different oil
pollution, based on processes of sorption, ion exchange,
and subsequent sedimentation, were carried out. The
performed experiments showed that modiﬁ ed sorbents
prepared on the basis of clay and phosphoric acid cel-
lulose esters (PEC)  efﬁ ciently purify water from oil
and oil products, the degree of puriﬁ cation reaches more
than 98–99%. Also different ions causing the hardness
of water, calcium and magnesium cations [2–4], are ad-
ditionally entrapped. Results of investigations are shown
on Figs. 1 and 2.
Let us note that the kinetics of sorption of oil and oil
products, in case of sorbents on the basis of plant raw
material and polygorskite, reaches equilibrium within
several seconds. It is found that the coefﬁ cient of sorption
) increases with the increase of the dispersity of sor-
bents, and the sorbent consumption (g/100 ml) decreases
(Fig. 1). After chemical modiﬁ cation (samples PEC and
clay) the value of K
increases more than twice (Fig. 2).
Products of cleaning containing oil products can be
easily removed, i.e., the desorption of products sorbed at
the expense of surface sorption forces is not required. The