Simultaneous bioreduction of tellurite and selenite by Yarrowia lipolytica, Trichosporon cutaneum, and their co-culture along with characterization of biosynthesized Te–Se nanoparticles

Microbial Cell Factories

Research

Hamid Moghimi¹  Firooz Hosseini¹  Maryam Hadian¹  Elham Lashani¹ 

[1] Department of Microbiology, School of Biology, College of Science, University of Tehran, Tehran, Iran;

关键词: Bioremediation;    Co-contamination;    Kinetics;    Metalloid oxyanions;    Te–Se nanoparticles;    Yeast;   

DOI  :  10.1186/s12934-023-02204-0

 received in 2023-05-24, accepted in 2023-09-18,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundNatural and anthropogenic activities, such as weathering of rocks and industrial processes, result in the release of toxic oxyanions such as selenium (Se) and tellurium (Te) into the environment. Due to the high toxicity of these compounds, their removal from the environment is vital.ResultsIn this study, two yeast strains, Yarrowia lipolytica and Trichosporon cutaneum, were selected as the superior strains for the bioremediation of tellurium and selenium. The reduction analyses showed that exposure to selenite induced more detrimental effects on the strains compared to tellurite. In addition, co-reduction of pollutants displayed almost the same results in selenite reduction and more than ~ 20% higher tellurite reduction in 50 h, which shows that selenite triggered higher tellurite reduction in both strains. The selenite and tellurite kinetics of removal were consistent with the first-order model because of their inhibitory behavior. The result of several characterization experiments, such as FE-SEM (Field emission scanning electron microscopy), dynamic light scattering (DLS), Fourier-transform infrared spectroscopy (FTIR), X-ray diffractometer (XRD), and dispersive X-ray (EDX) on Te–Se nanoparticles (NPs) revealed that the separated Te–Se NPs were needle-like, spherical, and amorphous, consisted of Te–Se NPs ranging from 25 to 171 nm in size, and their surface was covered with different biomolecules.ConclusionsRemarkably, this work shows, for the first time, the simultaneous bioreduction of tellurite and selenite and the production of Te–Se NPs using yeast strains, indicating their potential in this area, which may be applied to the nanotechnology industry and environmental remediation.Graphical Abstract

【 授权许可】

CC BY   
© BioMed Central Ltd., part of Springer Nature 2023

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