Sorption of ammonium ions on the surface of dispersed clay minerals

Authors

  • V. A. Andronov Research Center, National University of Civil Protection of Ukraine, Chernyshevska str., 94, Kharkiv, Ukraine, Ukraine
  • Yu. M. Danchenko Department of General Chemistry, Kharkiv National University of Civil Engineering and Architecture, Sumska str., 40, Kharkiv, Ukraine, Ukraine
  • T. M. Obigenko Department of General Chemistry, Kharkiv National University of Civil Engineering and Architecture, Sumska str., 40, Kharkiv, Ukraine, Ukraine
  • T. I. Umanska Department of General Chemistry, Kharkiv National University of Civil Engineering and Architecture, Sumska str., 40, Kharkiv, Ukraine, Ukraine
  • I. H. Ohrapishvili Department of Heat and Gas Supply, Ventilation and Use of Secondary Thermal Energy Resources, Kharkiv National University of Civil Engineering and Architecture, Sumska str., 40, Kharkiv, Ukraine, Ukraine

DOI:

https://doi.org/10.30838/P.CMM.2415.250918.69.133

Keywords:

sorption

Abstract

Purpose.  Determination of patterns of sorption of NH4+ions on the surface of dispersed  clay minerals of various chemical nature (sorbents). Establishing the relationship between the acid -base properties of active centers of the hydroxyl-hydrated surface layer of sorbents and the efficiency of extraction of  NH4+ions from aqueous solutions.  Method.  Modern methods were used  to study the surface and physical and chemical properties of clay sorbents: X-ray diffraction analysis, electronic scanning microscopy, potentiometric analysis of aqueous suspensions, spectrophotometric analysis. Studies on the sorption capacity of clay sorbents in relation to NH4+ions were conducted in static conditions.  Results.  The obtained results of experimental research of mineral composition, surface morphology, dispersion, specific surface, acid-base properties of hydroxyl-hydrated surface layer of disperse clay mineral sorbents. The comparative characteristic of the efficiency of the use of clay sorbents with different chemical nature for the extraction of NH4+ions from aqueous solutions is given. It is established that the sorption ability of cl ay sorbents increases in a number of bentonite clay > kaolin clay > diabase flour. It was established that the main mechanism of sorption of  NH4+ions on the surface of kaolin clay is ion exchange, and on the surface of diabase flour is physical adsorption. In aqueous suspensions of bentonite clay a mixed mechanism is realized: physical adsorption and ion exchange. Scientific novelty. Mechanisms and patterns of sorption of NH4+ions on the surface of clay sorbents: bentonite clay, kaolin clay and diabase flour have been established. The relationship between the mineral composition and the structure of the hydroxyl-hydrated surface layer of sorbents is established. It is shown that the mecha- nism of extraction of NH4+ions is due to the quantity and acid-base properties of the surface active centers of the hydroxyl-hydrated layer of sorbents.  Practical meaningfulness.  The obtained regularities will allow to use more effectively cheap and ecologically attractive disperse clay minerals as sorbents for cleaning liquid and gaseous media from NH4+ions.

Author Biographies

V. A. Andronov, Research Center, National University of Civil Protection of Ukraine, Chernyshevska str., 94, Kharkiv, Ukraine

D. Sc. (Tech.), Prof.

Yu. M. Danchenko, Department of General Chemistry, Kharkiv National University of Civil Engineering and Architecture, Sumska str., 40, Kharkiv, Ukraine

Ph. D, Assoc. Prof

T. M. Obigenko, Department of General Chemistry, Kharkiv National University of Civil Engineering and Architecture, Sumska str., 40, Kharkiv, Ukraine

Ph. D, Assoc. Prof.

T. I. Umanska, Department of General Chemistry, Kharkiv National University of Civil Engineering and Architecture, Sumska str., 40, Kharkiv, Ukraine

Ph. D, Assoc. Prof.

I. H. Ohrapishvili, Department of Heat and Gas Supply, Ventilation and Use of Secondary Thermal Energy Resources, Kharkiv National University of Civil Engineering and Architecture, Sumska str., 40, Kharkiv, Ukraine

M. Sc.

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Issue

Section

Life Safety