Yersiniabactin metal binding characterization and removal of nickel from industrial wastewater



Yersiniabactin (Ybt) is a metal-binding natural product that has been re-purposed for water treatment. The early focus of this study was the characterization of metal binding breadth attributed to Ybt. Using LC-MS analysis of water samples exposed to aqueous and surface-localized Ybt, quantitative assessment of binding was completed with metals that included Pd2+, Mg2+, and Zn2+. In total, Ybt showed affinity for 10 metals. Next, Ybt-modified XAD-16N resin (Ybt-XAD) was utilized to quantify the affinity for metal removal, showing a rank order of Fe3+ > Ga3+ > Ni2+ > Cu2+ > Cr2+≈Zn2+ > Co2+ > Pd2+ > Mg2+ > Al3+, and in the applied treatment of wastewater from a local precious metal plating company, showing selective removal of nickel from the aqueous effluent. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 33:1548–1554, 2017