Modelling combined effect of chloramine and copper on ammonia-oxidizing microbial activity using a biostability approach

Sarker, Dipok Chandra; Sathasivan, Arumugam; Rittmann, Bruce E.

doi:10.1016/j.watres.2015.07.019

Cited by 16 publications

(1 citation statement)

References 37 publications

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“…In contrast, roxithromycin and Cu(II) presented synergistic toxicity because their target sites were independent [ 24 ]. In addition, the combined effect of chloramine and copper has also been proved to fit a non-competitive inhibition model [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

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

Han

Liu

et al. 2021

PLoS ONE

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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.

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Section: Introductionmentioning

confidence: 99%