Notice of RetractionThe Biosorption of Strontium by Immobilized Saccharomyces cerevisiae Cells under Culture Conditions

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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The biosorption of strontium ions by immobilization, unimmobilized yeast (Saccharomyces cerevisiae) cells with calcium alginate and blank calcium alginate beads were studied in this research. The results showed that the beads of sodium alginate had certain ability of absorption of strontium ions; the biosorption of strontium ions by unimmobilized yeast cells was more stable, but the rate was slow at low concentrations; the biosorption by immobilized yeast was best, the biosorption may reach 80% at low strontium ions concentrations (10 mg/L). The biosorption rates of immobilized and unimmobilized yeast cells reached the same degree at the end. The Freundlich model was better than Langmuir model to describe the equilibrium isotherm. The pseudo-second-level model was fit to analysis the biosorption kinetics. The results indicated that calcium alginate can be used as the good immobilization vector for yeast cells and the immobilized and unimmobilized yeast cells showed better biosorption capacity at low strontium ions concentration under culture conditions.