“Sea Water” from Regenerative Effluents of Sodium-Cationite Filters

Purpose of research. To determine the possibility of using regenerative effluents of Na-cationite filters to obtain magnesium-enriched sodium chloride solutions 

Methods. The following methods were used in the research: physico-chemical, radiological analyses, atomicabsorption spectrometry, capillary electrophoresis; devices: beta-radiometer RUB-01P with a BJB-06P detector; gamma-spectrometer Gamma-1P; atomic absorption spectrometer KVANT-2AT; capillary electrophoresis system " DROPS”  modification "Drops 104T".

Results. Information about the biological properties of seawater and its elements has been studied. Laboratory studies have established that the concentration of calcium, magnesium, and chloride ions in regeneration effluents is several times higher than in seawater; sulfates - are many times less. The ratio of Mg²⁺/Ca²⁺ ion concentrations is: in seawater 3.95-5.03; in regenerative effluents-1.38; in fresh water-0.16-0.21 mg-eq/mg-eq/dm³. Strontium and cadmium in regeneration effluents are contained approximately at the same level as seawater. The concentration of strontium in seawater is in the Black, Barents, and Mediterranean seas, respectively: 7.7; 20.0; and 25.3 mg / dm³. The proportion of strontium in the total hardness in regenerative effluents is lower than in seawater. The total beta-activity of regenerative effluents and water of the Black Sea (near Gelendzhik) did not exceed the background values; in the area of Sochi it was 7.4 Bk/l. This is below the average level of -activity of the water of the World Ocean - 11.1 Bk/l. In the -spectra, with a relative measurement error of ± 20%, potassium-40 was detected: in seawater (Sochi) - 0.72 Bk/l; in regenerative effluents - 1.59 Bk/l. The remaining radionuclides have low activity and high measurement error.

Conclusion. Regenerative effluents of Na-cationite filters, with the lime-cationite method of softening fresh water, can be used for the preparation of magnesium-enriched wellness baths.

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