Technical Papers
Sep 7, 2022

Two Birds with One Stone Strategy for Controlling Environmental Antibiotic Resistance: Dual Function of Magnetic Nanosilver in Inhibiting Multidrug-Resistant Bacteria and Catalyzing Antibiotic Degradation

Publication: Journal of Environmental Engineering
Volume 148, Issue 11

Abstract

Antibiotic resistance has become a complicated environmental problem. Controlling the emission of antibiotics, antibiotic-resistant bacteria (ARB), and their antibiotic-resistance genes (ARGs) at hotspots is important for reducing environmental antibiotic resistance. Here, a Fe3O4-polydopamine (PDA)-Ag nanocomposite was successfully fabricated via hydrothermal synthesis, polydopamine coating, and in situ Ag reduction. The nanocomposite exhibited a core-shell structure with a nanosized magnetic Fe3O4 core (200  nm) coated with one layer of nanosilver Ag nanoparticles (Ag NPs) decorated polydopamine. Its application potential as a bifunctional material for the removal of multidrug-resistant (MDR) bacteria, ARGs, and antibiotics was investigated. The Fe3O4-PDA-Ag showed a good performance on inhibiting the MDR bacteria and effectively reduced the abundance of ARGs. The removal of ciprofloxacin (CIP) via catalytic reduction with this composite was evaluated. The optimized results showed that nearly 82.3% of CIP (C0=10  mg/L) was removed within 30 min with the amount of Fe3O4-PDA-Ag of 0.5  g/L and the concentration of NaBH4 of 10 mM. Furthermore, the catalytic activity of the composite did not decrease even after five cycles, indicating its good reusability as the catalyst. This study provided a preliminary two birds with one stone strategy for solving the environmental problem of antibiotic-resistance pollution.

Practical Applications

Antibiotic resistance has become a comprehensive and complicated environmental pollution problem. The selective pressure exerted by antibiotics and the proliferation of ARB and ARGs can promote the bloom of environmental antibiotic resistance. Single control of the emission of a certain kind of pollutant (antibiotics, ARB, or ARGs) at hotspots will not effectively solve the environmental pollution problem of antibiotic resistance. Here, we provided a one stone, two birds strategy for solving this problem of environmental antibiotic resistance in virtue of the dual function of a magnetic nanosilver composite in inhibiting multidrug-resistant bacteria and catalyzing antibiotic degradation.

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Data Availability Statement

All data, models, and code generated or used during the study appear in the published article.

Acknowledgments

This work was funded by the National Natural Science Foundation of China (Nos. 21677104 and 22176133).

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Go to Journal of Environmental Engineering
Journal of Environmental Engineering
Volume 148Issue 11November 2022

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Received: May 11, 2022
Accepted: Jun 22, 2022
Published online: Sep 7, 2022
Published in print: Nov 1, 2022
Discussion open until: Feb 7, 2023

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Lihua Zhang
Master, Dept. of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan Univ., Chengdu 610065, China.
Yufei Lin
Master, Dept. of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan Univ., Chengdu 610065, China.
Yong Xiao
Master, Ministry of Education Research Center for Comprehensive Utilization and Clean Processing Engineering of Phosphorus Resources, School of Chemical Engineering, Sichuan Univ., Chengdu 610065, China.
Jinyong Wu
Master, Dept. of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan Univ., Chengdu 610065, China.
Associate Professor, Dept. of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan Univ., Chengdu 610065, China (corresponding author). ORCID: https://orcid.org/0000-0001-5300-8119. Email: [email protected]

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