Arch food sci technol | Volume 1, Issue 1 | Short Communication | Open Access

Spent Brewer’s Yeast as Biosorbent for Some Heavy Metal Ions

Andreea Stanila*

Department of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, Romania

*Correspondance to: Andreea Stanila 

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Yeasts are efficient biosorbents for heavy metal ions. The purpose of this experiment was to demonstrate the involvement of the free amino acids present in Spent Brewer’s Yeast (BSY) in the coordination of copper ions of Cu2+, Pb2+, Zn2+ ions. Amino acids involvement in metal biosorption could be attributed to their capacity to coordinate metal ions. As biosorbents was used spent brewer’s yeast type Saccharomyces cerevisiae purchased from the local brewery. The metal ion solutions were prepared in concentrations of 1 mg/L using their salts. The experiments were conducted at pH=5, which is the most appropriate for amino acids and metal ions to avoid precipitation. The amino acids were quantified by HPLC-DAD/-ESI-MS chromatography method. There were 24 amino acids quantified by HPLC method in brewer’s yeast and their profile differs after biosorption. The significant lower concentrations of amino acids remaining after biosorption can be explained by their involvement in the complexation of metal ions.


Brewer yeast; Amino acids; Biosorption; Heavy metals


Stanila A. Spent Brewer’s Yeast as Biosorbent for Some Heavy Metal Ions. Arch Food Sci Technol. 2020; 1(1): 1005..

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