PROTECTION AGAINST THE TOXIC EFFECT OF CADMIUM SULFATE IN THE PRESENCE OF SHUNGITE IN BATCH CULTURE OF MICROALGAE

A combined effect of 1.5 mg / l of cadmium sulfate and 100 g / l of shungite on the development of the culture of green chlorococcales microalgae Scenedesmus quadricauda (Turp.) Bréb was studied. It is shown that stimulation of algal culture growth was observed in the presence of shungite, and in the presence of cadmium sulfate on the contrary, there is a complete inhibition of its growth as compared to the controls. Under the combined action of cadmium sulfate and shungite on the Scenedesmus quadricauda, cadmium sulfate toxic effect disappeared. The most intensive growth of the culture occurred when shungite was only added to the culture medium and herewith in the presence of schungite, the photosynthesis efficiency, number of cells and live cells percentage increased. In the presence of schungite, were observed lengthening of the growth stationary phase and a later transition of the culture to the die-away phase. It means, the population life span lengthens. Apparently, shungite in the culture medium acts as a sorbent on the one hand, and on the other hand alters the medium redox state, contributing to the culture favorable growth. The mechanism of shungite action could be various and it can be used as a universal remedy for purification of water from various pollutants.