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The absorption characteristics of Cr(III), Cr(VI), Cu(II) ions on intactliving cells Spirulina platensis (pH9.6) were studied by using a UV-VISspectrophotometer. Also biosorption of these ions with cyanobacteria Spirulinaplatensis were studied using equilibrium dialysis and atomic absorptionanalysis.It was shown, that the absorption intensity of Spirulina platensisdecreases, when Cr(III), Cr(VI), Cu(II) ions are added. Significant differencebetween the absorption intensity for Cu(II) Spirulina platensis and Cr(VI),Cr(III) Spirulina platensis were observed. Cu(II) was more effectively adsorbedby cyanobacterium than Cr(VI) and Cr(III). The biosorption constants for Cu(II)Spirulina platensis is higher than for Cr(VI) and Cr(III) Spirulina platensis2.69 and 10.15- fold respectively.

Biosorption of Cr(III), Cr(VI), Cu(II) ions by intact cells of Spirulina platensis