Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 5, pp. 726−730.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © V.M. Novotortseva, I.O. Mel’nikov, T.A. Tripol’skaya, N.S. Busygina, S.A. Rodionova, A.V. Artemov, 2012, published in Zhurnal
Prikladnoi Khimii, 2012, Vol. 85, No. 5, pp. 723−728.
AND INDUSTRIAL INORGANIC CHEMISTRY
Examination of the Disinfecting Properties of Calcium Peroxide
and Its Suitability for Improving Hydrodynamic Characteristics
of Surface Water Bodies
V. M. Novotortsev
, I. O. Mel’nikov
, T. A. Tripol’skaya
, N. S. Busygina
S. A. Rodionova
, and A. V. Artemov
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
Moscow State University of Design and Technology, Moscow, Russia
Received August 5, 2011
Abstract—The fundamental possibility of using solid peroxides of alkaline-earth metals for water disinfection
purposes was explored. The maximum peroxide concentration in solution is achieved with addition of a mixture
of boric and phosphoric acids. Water treatment with calcium peroxide leads to stable dissolved oxygen levels and
improves some hydrochemical characteristics of surface water bodies.
Dramatic deterioration in the condition of freshwater
resources is an inherent feature of the current environmen-
tal situation around the world . Along with chemical
pollutants, water bodies are contaminated with pathogenic
and conditionally pathogenic microorganisms which are
extremely hazardous to human health. In view of the fact
that ensuring the access to safe drinking water is one of
the high-priority activities undertaken by many interna-
tional organizations (WHO, UNESCO, United Nations,
etc.), the search for new methods of water disinfection
is receiving today ever-growing attention.
The most common disinfection method in modern
water treatment processes is inactivation of microbial
ﬂ ora with chemical disinfecting agents. This purpose is
achieved with the use of a broad spectrum of different
substances (see table) whose application in water treat-
ment often involves formation of toxic byproducts [2, 3].
The search for environmentally friendly disinfectants
is a topical issue. Today, ever-increasing application is
found by an alternative disinfection procedure consisting
in water treatment with hydrogen peroxide in combination
with UV radiation and ozone [4, 5]. Hydrogen peroxide
is a unique oxidant combining selectivity, versatility,
and environmental friendliness. On the one hand, its de-
composition yields a hydroxyl radical whose oxidation
potential is second to ﬂ uorine only. On the other hand,
is a natural product of metabolism (metabolite) of
living organisms in which it is synthesized and subse-
quently decomposed into oxygen and water.
The above-listed properties of hydrogen peroxide
make it suitable simultaneously for water disinfection
and treatment to remove various organic and inorganic
compounds of natural and anthropogenic origin [6, 7]. It
should be noted that the mechanism by which hydrogen
peroxide affects bacterial cells is not clearly understood.
In a number of studies it was associated with formation in
hydrogen peroxide solutions of superoxide and hydroxyl
radicals containing active oxygen [Eqs. (1) and (2)] [6, 8],
able to oxidize all classes of biological macromolecules,
including lipids, proteins, and nucleic acids .
Indeed, free radicals are active intermediate particles
formed in most cases of decomposition of hydrogen
peroxide. In the alkaline pH region, the process can be
schematically represented by Eqs. (1–6).
Formation of superoxide and hydroxyl radicals: