The Dual Roles of Nano Zero-Valent Iron and Zinc Oxide in Antibiotics Resistance Genes (ARGs) Spread in Sediment

Ling Luo, Dahang Deng, Xin Zhao, Hairong Hu, Xinyi Li, Jidong Gu, Yan He, Gang Yang, Ouping Deng and Yinlong Xiao
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Ling Luo: College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
Dahang Deng: College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
Xin Zhao: College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
Hairong Hu: College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
Xinyi Li: College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
Jidong Gu: Environmental Science and Engineering, Guangdong Technion-Israel Institute of Technology, 241 Daxue Road, Shantou 515063, China
Yan He: College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
Gang Yang: College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
Ouping Deng: College of Resources, Sichuan Agricultural University, 211 Huimin Road, Chengdu 611130, China
Yinlong Xiao: College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China

IJERPH, 2022, vol. 19, issue 15, 1-16

Abstract: Nanoparticles (NPs) are widely used and ubiquitous in the environment, but the consequences of their release into the environment on antibiotics resistance genes (ARGs), microbial abundance, and community, are largely unknown. Therefore, this study examined the effect of nano zero-valent iron (nZVI) and zinc oxide (nZnO) on tetracycline resistance genes (tet-ARGs) and class 1 integron ( intI1 ) in sediment under laboratory incubation. The coexistence of NPs and tetracycline (TC) on tet-ARGs/ intI1 was also investigated. It was found that nZVI and nZnO promoted tet-ARGs/ intI1 abundance in sediment without TC but reduced the inducing effect of TC on tet-ARGs/ intI1 in sediment overlaid with TC solution. Without TC, nZVI, intI1 , and the bacterial community could directly promote tet-ARGs spread in nZVI sediment, while intI1 and bacterial abundance were the most directly important reasons for tet-ARGs spread in nZnO sediment. With TC, nZVI and bacterial community could reduce tet-ARGs abundance in nZVI sediment, while nZnO and bacterial community could directly promote tet-ARGs in nZnO sediment. Finally, these findings provided valuable information for understanding the role of NPs in promoting and reducing ARGs in the environment.

Keywords: nanoscale zero-valent iron (nZVI); zinc oxide nanoparticles (nZnO); tetracycline resistance genes (tet-ARGs); class 1 integron ( intI1 ); tetracycline (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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