Reusable magnetic alginate nanocomposite with immobilized Pseudozyma antarctica yeast cells offers the potential for bioremediation and detoxification of reactive black 5 dye.

Azo dyes in wastewater of textile, paper and pulp, cosmetics, and leather tanning industries have toxicity and mutagenicity for all living organisms. The aim of the current research was the study of free and immobilized yeast cells of Pseudozyma antarctica on the beads of magnetic alginate nanocomposite to decolorize and detoxify Reactive Black 5 (RB5) as a representative of azo dyes. This yeast decolorized a high concentration of RB5 (2500 mg/L) with 82.