Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 4, pp. 552−557.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © A.V. Savel’eva, A.A. Ivanov, N.V. Yudina, O.I. Lomovsky, Dzh. Dugarzhav, 2013, published in Zhurnal Prikladnoi Khimii, 2013,
Vol. 86, No. 4, pp.592−597.
Inﬂ uence of the Conditions of Mechanical Activation
of Lignite on the Composition and Sorption Properties
of Humic Acids Isolated from It
A. V. Savel’eva
, A. A. Ivanov
, N. V. Yudina
, O. I. Lomovsky
, and Dzh. Dugarzhav
Institute of Petroleum Chemistry, Siberian Branch of Russian Academy of Sciences, Tomsk, Russia
Institute of Solid State Chemistry and Mechanochemistry,
Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
The Institute of Chemistry and Chemical Technology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia
Received September 17, 2012
Abstract—The results of the study of the inﬂ uence of mechanical activation of lignite on the composition of iso-
lated humic acids and their adsorption to the quartz river sand were generalized. The changes in the composition
of humic acids after adsorption to the sand, which are an evidence of a signiﬁ cant role of phenolic hydroxyls in
the process, were demonstrated.
Humic acids (HA) are high molecular, multifunctional,
and polyconjugated systems of natural origin, which are
formed by the decomposition of plant and animal residues
by microorganisms and abiotic environmental factors .
HA are the most mobile and reactive component of humic
substances. They are actively involved in the chemical
processes that occur in ecosystems . The presence of
functional groups such as carboxyl, carbonyl, hydroxyl,
in combination with aromatic structures provides a wide
range of interactions in adsorption processes. Products of
interaction of humic substances with soil minerals are an
essential part of the soil mass. In this interaction mani-
fests itself one of the speciﬁ c aspects of soil formation
as a special natural process. Because of this there occur
structuring of soil, accumulation of nutrients and micro-
nutrients, regulation of geochemical streams of metals in
aqueous and soil ecosystems . The interactions of peat
humus with different mineral species are important in the
formation of peat soils. It is noted that on clay minerals
HA, in which carbohydrate-peptide fragments dominate,
are characterized by most highly selective absorption.
The concept of using soil minerals as templates for the
synthesis of organic compounds are widely accepted
. Investigation of the mechanism of interaction of HA
with mineral components of soil is of interest not only
to predict the redistribution of HA in the environment,
but also to develop ways to manage migration processes
of pollutants in natural environments, restoration and
remediation of soil, creating a new generation of sorbents
and biologically active materials.
Macromolecular polymeric compound bound in
caustobiolites in complex organic complexes can not be
totally isolated from them without additional process-
ing, in particular, dispersing. Dispersing causes changes
in their porous supramolecular structure, physical state,
and properties and increases the extraction efﬁ ciency [5,
6]. Previously it was shown that mechanical activation
of peat in the presence of chemical reagents not only
increases a yield of HA by 2–3 times but changes their
composition and properties [7–9]. Therefore, this way of
processing of caustobiolites can be used for obtaining of
humic substances with desired properties.
The purpose of the study is to examine the effect of
conditions of mechanical activation of lignite on the
composition and sorption properties of HA isolated