Combined impact of TiO2 nanoparticles and antibiotics on the activity and bacterial community of partial nitrification system.
Journal
PloS one
ISSN: 1932-6203
Titre abrégé: PLoS One
Pays: United States
ID NLM: 101285081
Informations de publication
Date de publication:
2021
2021
Historique:
received:
07
05
2021
accepted:
24
10
2021
entrez:
15
11
2021
pubmed:
16
11
2021
medline:
1
1
2022
Statut:
epublish
Résumé
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.
Identifiants
pubmed: 34780518
doi: 10.1371/journal.pone.0259671
pii: PONE-D-21-15084
pmc: PMC8592496
doi:
Substances chimiques
Anti-Bacterial Agents
0
Nitrites
0
titanium dioxide
15FIX9V2JP
Erythromycin
63937KV33D
Titanium
D1JT611TNE
Tetracycline
F8VB5M810T
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e0259671Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
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