ISSN 1070-4272, Russian Journal of Applied Chemistry, 2015, Vol. 88, No. 8, pp. 1338−1342. © Pleiades Publishing, Ltd., 2015.
Original Russian Text © R.V. Yakushin, V.A. Kolesnikov, V.A. Brodskii, E.N. Oﬁ tserov, A.V. Chistolinov,
2015, published in Zhurnal Prikladnoi Khimii, 2015,
Vol. 88, No. 8, pp. 1221−1226.
Degradation of Organic Substances in Aqueous Solutions
under the Action of Pulsed High-Voltage Discharges
R. V. Yakushin, V. A. Kolesnikov, V. A. Brodskii, E. N. Oﬁ tserov, and A. V. Chistolinov
Mendeleev University of Chemical Technology of Russia, Miusskaya pl. 9, Moscow, 125047 Russia
Received September 7, 2015
Abstract—Pollution of water with highly toxic durable organic substances leads to irreversible environmental
changes. Physicochemical and biological methods of water treatment are being developed for controlling such
pollution. Oxidation of aromatic and aliphatic organic substances in water by pulsed high-voltage discharges
was studied. A decrease in the chemical oxygen demand was noted. The efﬁ ciency of the removal of organic
substances from the solutions being treated was evaluated.
Intense use of oil reﬁ ning products, use of pesticides
and herbicides in agriculture, and active household use of
synthetic surfactants are responsible for strong pollution
of natural and wastewaters with highly toxic durable
Such contaminants get into natural water bodies
mainly with industrial wastewaters. The organic
impurities present in them exhibit mutagenic properties
and general toxicity. They also appreciably impair the
organoleptic properties of potable water. The release of
these substances into the environment cannot be fully
prevented even when directing wastewaters to municipal
sewage and water treatment facilities .
Prevention of natural water pollution and reduction of
the negative impact of organic pollutants on biological
processes in ecosystems become a topical line of
Chemical, physicochemical, and biological methods
of oxidation of durable organic compounds in water are
used for solving this problem.
Particular attention is given to the development of
highly efﬁ cient oxidative technologies of water treatment,
based on the use of reagentless methods, in which no
chemical reagents are added to water. Ultraviolet and ul-
trasonic radiation, cavitation, and electric ﬁ eld constitute
a complex of reagentless methods of water treatment .
In this study, we considered the method of electric
discharge water treatment, consisting in generation of
electric discharge with preset parameters directly at the
gas phase boundary, near the liquid surface.
It is known that such technical solution allows the
generation of active species [hydrogen peroxide (H
atomic oxygen (O˙), hydroxyl radical (HO˙), pehydroxyl
˙), ozone (O
, and O
] to be combined
with their introduction directly into the solution being
treated, without the need for using chemically hazardous
oxidants . The generation of such species in the
required concentrations, followed by their subsequent
transformations, favors the degradation of organic
compounds to mineral or biodegradable substances.
As shown previously [2, 4], such treatment can inﬂ u-
ence the valence state of transition metal ions in water.
In most cases, they undergo oxidation to higher oxides,
which, in turn, can be readily removed by ﬁ ltration. This
effect is due to high reactivity of OH radicals, which are
among the most reactive intermediates generated.
Hydroxyl radical is one of the strongest oxidants; its
redox potential is about 2.8 eV. These species readily
dissolve in water and have the half-life of the order
s; therefore, ОН radicals cannot accumulate in
the system in a large amount. The products of radical
dissociation of water, along with the reaction with organic
pollutants, also form H