Selective fungal bioprecipitation of cobalt and nickel for multiple-product metal recovery.

Microbial Biotechnology
John FerrierG M Gadd

Abstract

There are a need for novel, economical and efficient metal processing technologies to improve critical metal sustainability, particularly for cobalt and nickel which have extensive applications in low-carbon energy technologies. Fungal metal biorecovery processes show potential in this regard and the products of recovery are also industrially significant. Here we present a basis for selective biorecovery of Co and Ni oxalates and phosphates using reactive spent Aspergillus niger culture filtrate containing mycogenic oxalate and phosphate solubilized from struvite. Selective precipitation of oxalates was achieved by adjusting phosphate-laden filtrates to pH 2.5 prior to precipitation. Co recovery at pH 2.5 was high with a maximum of ~96% achieved, while ~60% Ni recovery was achieved, yielding microscale polyhedral biominerals. Co and Ni phosphates were precipitated at pH 7.5, following prior oxalate removal, resulting in near-total Co recovery (>99%), while Ni phosphate yields were also high with a recovery maximum of 83.0%.

References

Dec 5, 2006·Water Research·Kristell S Le CorreSimon A Parsons
Jun 15, 2007·Environmental Microbiology·M FominaG M Gadd
May 8, 2008·Current Biology : CB·Marina FominaGeoffrey M Gadd
Jan 17, 2012·Current Biology : CB·Young Joon RheeGeoffrey Michael Gadd
Jun 19, 2013·Applied and Environmental Microbiology·Gilberto de Oliveira MendesMaurício Dutra Costa
Nov 26, 2014·Environmental Science & Technology·Qianwei LiGeoffrey Michael Gadd
Sep 15, 2015·Nature Communications·Hyunah KimKisuk Kang
Jul 12, 2017·Microbial Biotechnology·Xinjin Liang, Geoffrey Michael Gadd
Jul 18, 2017·Microbial Biotechnology·Qianwei Li, Geoffrey Michael Gadd
Mar 19, 2019·Environmental Microbiology·John FerrierGeoffrey Michael Gadd
Nov 30, 2019·Applied Microbiology and Biotechnology·Yuyi YangGeoffrey Michael Gadd
Feb 23, 2020·Environmental Microbiology·Bongkotrat SuyamudGeoffrey Michael Gadd

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