STUDY OF HYDROXOCOMPLEXES FORMATION IN Fe3+ – Co2+ –NO-3  – H2O SYSTEM

UDC 546.62:546.492:546.732

  • Sokolovsky Aleksandr Evgen’yevich – PhD (Chemistry), Assistant Professor, the Department of Physical, Colloid and Analytical Chemistry. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: vecfmme@tut.by

DOI: https://doi.org/10.52065/2520-2669-2021-241-1-35-39

Keywords:  iron, cobalt, potentiometry, dialysis, hydroxocomplexes.

For citation: Sokolovsky A. E. Study of hydroxocomplexes formation in Fe3+ – Co2+ –   – H2O system. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2021, no. 1 (241), pp. 35–39 (In Russian). DOI: https://doi.org/10.52065/2520-2669-2021-241-1-35-39.

Abstract

The hydrolysis processes in the system Fe3+ – Co2+ – NO-3   – H2O have been investigated by potentio­metric titration and dialysis methods. The experimental data have been obtained under following conditions: ions concentration – 0.01 mol/l, molar ratio Fe3+ : Co2+ = 1 : 1, ionic strength – 0.3 mol/l (NaNO3), temperature – (25 ± 0.1)°С, pH-range – 1.5–2.4. The distribution of different Fe (III) and Co (II) forms upon pH value has been calculated upon experimental data. It has been established that Fe (III) and Co (II) not form heteronuclear hydroxocomplexes. The conducted research can be used in the development of wastewater treatment technology.

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05.11.2020