STUDIU COMPARATIV ASUPRA ACUMULĂRII STRONŢIULUI, CUPRULUI ŞI FIERULUI LA CULTIVAREA CIANOBACTERIEI SPIRULINA PLATENSIS ÎN PREZENŢA UNOR HETEROCOMPUŞI COORDINATIVI

Valentina BULIMAGA, Valeriu RUDIC*, Liliana ZOSIM, Vasile LOZAN**, Viorina GORINCIOI**, Maria-Bianca BULIMAGA, Maria MACARI Universitatea de Stat din Moldova, *Institutul de Microbiologie şi Biotehnologie, **Institutul de Chimie

Аннотация

COMPARATIVE STUDY ON THE ACCUMULATION OF STRONTIUM, COPPER,  AND IRON UPON CULTIVATION OF SPIRULINA PLANTENSIS IN PRESENCE  OF COORDINATIVE HETEROCOMPOUNDS

The influence of two coordinative hetero-compounds of Sr(II) and Cu(II) − CuSr1 and CuSr2 − on the productivity and the accumulation of strontium, copper and iron in Spirulina platensis biomass was studied. It has been established that both hetero-complexes exhibit a stimulating effect on productivity within the concentration limits of 1-7 mg/l, whereas a more pronounced decreasing trend is observed at concentrations of 7-9 mg/l when using the CuSr2 hetero-compound, which contains protonated methyl salicylic acid. The quantity of Cu and Sr accumulated in spirulina biomass increases with the concentration of these elements for CuSr1, reaching maximum values of 1.59 mg% Cu and 1.66-1.70 mg% Sr, or about 1.5 and 1.2 times more, respectively, compared to their content for CuSr2. Both hetero-compounds contribute to the more efficient accumulation of iron from the growth medium (up to 25-26.3 mg%), compared to the reference sample (11.5 mg% Fe) without addition of compounds.

Keywords: Spirulina platensis, coordinative heterocompounds, strontium, copper, accumulation.