INVESTIGATION OF THE EFFECT OF AN IMPREGNATING AGENT ON THE SORPTION CHARACTERISTICS OF A CARBON-SILICON SORBENT

Abstract

Introduction: Efforts to control the spread of airborne respiratory pathogens in enclosed
public spaces have become particularly relevant due to the COVID-19 pandemic. One of the control
methods is the use of bactericidal filters for ventilation air purification systems in enclosed public spaces
in order to effectively remove pathogenic microorganisms from the air environment. The impregnated
sorbents developed in this work are used as a filter material. The purpose of the work is investigation of
the effect of an impregnating agent on the sorption characteristics of a carbon-silicon sorbent used as the
basis of bactericidal filters for air purification. Methodology. It has been established that carbonation
makes it possible to obtain more durable carbon sorbents with a high specific surface area. According to
the results of X-ray dispersion analysis, carbonized rice husk contains 86.57% carbon and 1.75% silicon.
Results and discussion. The effect of the carbonization process on the specific surface area and specific
volume of the initial sorbent has been studied. The specific surface area was measured and the pore size of
impregnated carbon-silicon sorbents was measured. The study of the effect of impregnating agents on the
sorption characteristics of a carbon-silicon sorbent showed that an increase in the concentration of
chlorhexidine and tannin in the composition leads to an increase in the specific surface area and specific
pore volume of sorbents. Conclusion. It was found that the impregnation of a carbon sorbent leads to an
increase in the specific surface area from 320 g/m2
to 350 g/m 2, the specific pore volume from 0.1256
cm3/g to 0.1399 cm3/g.