OPTICAL PROPERTIES OF STRONTIUM-SPIRULINA COMPLEXES AFTER CONTINUOUS HIGH DOSE IRRADIATION AND PARTIALLY MEDIUM MODIFICATION

Abstract

Strontium is one of the most important radionuclides produced by nuclear fission. It enters the body through ingestion, inhalation, and skin and accumulates in tissues and organs. Therefore, it is of great importance to study the adsorption of radionuclides and heavy metals by Spirulina.  It was study the optical properties of Arthrospira platensis (spirulina) after partially replacing potassium ions with cesium ions (K⁺/Cs⁺=2.5 in medium) in nutrition medium, followed by irradiation 150 kGy with gamma radiation and re-cultivation. It was shown, that the action of strontium ions causes a change in the absorption intensity of spirulina. The addition of strontium after gamma irradiation and re-cultivation of spirulina results in a very rapid change in absorption intensity compared to the control, while the subsequent effect of strontium is almost negligible. Therefore, it can be assumed that in the case of irradiated spirulina, the first added strontium induces change that limits the action of subsequent strontium. Strontium causes a gradual decrease in absorption intensity for cases chlorophyll a, carotenoids, and C-phycocyanin in intact spirulina.  Spirulina may serve as an effective biosorbent for reducing strontium.