Abstract
An environmentally friendly method using the baker's yeast Saccharomyces cerevisiae was developed to recover soluble Au(III) from neutral and acidic solutions at room temperature. Resting cells of S. cerevisiae were able to reduce aqueous Au(III) ions in HAuCl4 solution to metallic Au(0) at pH 7.0 within 120 min when formate was provided as the electron donor under anaerobic conditions. Gold nanoparticles were deposited on the cell surface of S. cerevisiae. The S. cerevisiae cells were also applicable to a bio-material for adsorbing aqueous Au(III) ions from HAuCl4 solution at pH 1.0 under air atmosphere. When processing the aqua regia leachate of electronic waste (Central Processing Units, CPU), the S. cerevisiae cells were able to rapidly and selectively collect aqueous Au(III) ions from the aqua regia leachate at pH 1.2 within 10 min. Our proposed microbial methods enable the rapid and efficient recovery of gold over the pH range 1.0 to 7.0.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
