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Article

Fe2+ Alleviated the Toxicity of ZnO Nanoparticles to Pseudomonas tolaasii Y-11 by Changing Nanoparticles Behavior in Solution

1
Chongqing Key Laboratory of Soil Multiscale Interfacial Process, College of Resources and Environment, Southwest University, Chongqing 400716, China
2
School of Chemical Engineering, University of Queensland, Brisbane, QLD 4072, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: James S. Maki
Microorganisms 2021, 9(11), 2189; https://doi.org/10.3390/microorganisms9112189
Received: 30 July 2021 / Revised: 26 September 2021 / Accepted: 11 October 2021 / Published: 20 October 2021
(This article belongs to the Topic Anaerobic Digestion Processes)
The negative effect of ZnO nanoparticles (ZnO-NPs) on the biological removal of nitrate (NO3) has received extensive attention, but the underlying mechanism is controversial. Additionally, there is no research on Fe2+ used to alleviate the cytotoxicity of NPs. In this paper, the effects of different doses of ZnO-NPs on the growth and NO3 removal of Pseudomonas tolaasii Y-11 were studied with or without Fe2+. The results showed that ZnO-NPs had a dose-dependent inhibition on the growth and NO3 removal of Pseudomonas tolaasii Y-11 and achieved cytotoxic effects through both the NPs themselves and the released Zn2+. The addition of Fe2+ changed the behavior of ZnO-NPs in an aqueous solution (inhibiting the release of toxic Zn2+ and promoting the aggregation of ZnO-NPs), thereby alleviating the poisonous effect of ZnO-NPs on the growth and nitrogen removal of P. tolaasii Y-11. This study provides a theoretical method for exploring the mitigation of the acute toxicity of ZnO-NPs to denitrifying microorganisms. View Full-Text
Keywords: Pseudomonas tolaasii; Ferrous iron; ZnO-NPs; detoxification; aerobic denitrification; magnesium Pseudomonas tolaasii; Ferrous iron; ZnO-NPs; detoxification; aerobic denitrification; magnesium
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MDPI and ACS Style

Yang, Y.; Zhang, C.; Li, K.; Li, Z. Fe2+ Alleviated the Toxicity of ZnO Nanoparticles to Pseudomonas tolaasii Y-11 by Changing Nanoparticles Behavior in Solution. Microorganisms 2021, 9, 2189. https://doi.org/10.3390/microorganisms9112189

AMA Style

Yang Y, Zhang C, Li K, Li Z. Fe2+ Alleviated the Toxicity of ZnO Nanoparticles to Pseudomonas tolaasii Y-11 by Changing Nanoparticles Behavior in Solution. Microorganisms. 2021; 9(11):2189. https://doi.org/10.3390/microorganisms9112189

Chicago/Turabian Style

Yang, Yuran, Can Zhang, Kaili Li, and Zhenlun Li. 2021. "Fe2+ Alleviated the Toxicity of ZnO Nanoparticles to Pseudomonas tolaasii Y-11 by Changing Nanoparticles Behavior in Solution" Microorganisms 9, no. 11: 2189. https://doi.org/10.3390/microorganisms9112189

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