Combined impact of TiO2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.

The effects of TiO2 nanoparticles (nano-TiO2) together with antibiotics leaking into wastewater treatment plants (WWTPs), especially the partial nitrification (PN) process remain unclear. To evaluate the combined impact and mechanisms of nano-TiO2 and antibiotics on PN systems, batch experiments wer...

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Autores principales:	Han Xu, Binghua Liu, Wenyu Qi, Meng Xu, Xiaoyu Cui, Jun Liu, Qiang Li
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1ca5e02849204437b09e1cdc1594aa99
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spelling	oai:doaj.org-article:1ca5e02849204437b09e1cdc1594aa992021-12-02T20:13:08ZCombined impact of TiO2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.1932-620310.1371/journal.pone.0259671https://doaj.org/article/1ca5e02849204437b09e1cdc1594aa992021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0259671https://doaj.org/toc/1932-6203The effects of TiO2 nanoparticles (nano-TiO2) together with antibiotics leaking into wastewater treatment plants (WWTPs), especially the partial nitrification (PN) process remain unclear. To evaluate the combined impact and mechanisms of nano-TiO2 and antibiotics on PN systems, batch experiments were carried out with six bench-scale sequencing batch reactors. Nano-TiO2 at a low level had minimal effects on the PN system. In combination with tetracycline and erythromycin, the acute impact of antibiotics was enhanced. Both steps of nitrification were retarded due to the decrease of bacterial activity and abundance, while nitrite-oxidizing bacteria were more sensitive to the inhibition than ammonia-oxidizing bacteria. Proteobacteria at the phylum level and Nitrosospira at the genus level remained predominant under single and combined impacts. The flow cytometry analysis showed that nano-TiO2 enhanced the toxicity of antibiotics through increasing cell permeability. Our results can help clarify the risks of nano-TiO2 combined with antibiotics to PN systems and explaining the behavior of nanoparticles in WWTPs.Han XuBinghua LiuWenyu QiMeng XuXiaoyu CuiJun LiuQiang LiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 11, p e0259671 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Han Xu Binghua Liu Wenyu Qi Meng Xu Xiaoyu Cui Jun Liu Qiang Li Combined impact of TiO2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.
description	The effects of TiO2 nanoparticles (nano-TiO2) together with antibiotics leaking into wastewater treatment plants (WWTPs), especially the partial nitrification (PN) process remain unclear. To evaluate the combined impact and mechanisms of nano-TiO2 and antibiotics on PN systems, batch experiments were carried out with six bench-scale sequencing batch reactors. Nano-TiO2 at a low level had minimal effects on the PN system. In combination with tetracycline and erythromycin, the acute impact of antibiotics was enhanced. Both steps of nitrification were retarded due to the decrease of bacterial activity and abundance, while nitrite-oxidizing bacteria were more sensitive to the inhibition than ammonia-oxidizing bacteria. Proteobacteria at the phylum level and Nitrosospira at the genus level remained predominant under single and combined impacts. The flow cytometry analysis showed that nano-TiO2 enhanced the toxicity of antibiotics through increasing cell permeability. Our results can help clarify the risks of nano-TiO2 combined with antibiotics to PN systems and explaining the behavior of nanoparticles in WWTPs.
format	article
author	Han Xu Binghua Liu Wenyu Qi Meng Xu Xiaoyu Cui Jun Liu Qiang Li
author_facet	Han Xu Binghua Liu Wenyu Qi Meng Xu Xiaoyu Cui Jun Liu Qiang Li
author_sort	Han Xu
title	Combined impact of TiO2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.
title_short	Combined impact of TiO2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.
title_full	Combined impact of TiO2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.
title_fullStr	Combined impact of TiO2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.
title_full_unstemmed	Combined impact of TiO2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.
title_sort	combined impact of tio2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/1ca5e02849204437b09e1cdc1594aa99
work_keys_str_mv	AT hanxu combinedimpactoftio2nanoparticlesandantibioticsontheactivityandbacterialcommunityofpartialnitrificationsystem AT binghualiu combinedimpactoftio2nanoparticlesandantibioticsontheactivityandbacterialcommunityofpartialnitrificationsystem AT wenyuqi combinedimpactoftio2nanoparticlesandantibioticsontheactivityandbacterialcommunityofpartialnitrificationsystem AT mengxu combinedimpactoftio2nanoparticlesandantibioticsontheactivityandbacterialcommunityofpartialnitrificationsystem AT xiaoyucui combinedimpactoftio2nanoparticlesandantibioticsontheactivityandbacterialcommunityofpartialnitrificationsystem AT junliu combinedimpactoftio2nanoparticlesandantibioticsontheactivityandbacterialcommunityofpartialnitrificationsystem AT qiangli combinedimpactoftio2nanoparticlesandantibioticsontheactivityandbacterialcommunityofpartialnitrificationsystem
_version_	1718374810265845760

Combined impact of TiO2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.

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