Issue 19, 2018, Issue in Progress

Ozonation of ketoprofen with nitrate in aquatic environments: kinetics, pathways, and toxicity

Abstract

In this study, nitrate ion (NO3) was found to collaborate with ozone thereby accelerating the degradation of ketoprofen. NO3 was discovered to induce the generation of hydroxyl radicals (·OH), which was crucial to the decomposition of PPCPs in wastewater treatment plants. Kinetic studies on the decomposition of ketoprofen were investigated under different concentrations of NO3. The impact mechanisms and degradation by-products were experimentally determined. The results revealed that all reactions fitted the pseudo-first-order kinetic model well. The presence of NO3 had the capacity to accelerate the ozonation of ketoprofen. The reaction by-products were evaluated by UPLC-Q-TOF-MS, and a total of five intermediates generated via the ozonation of ketoprofen were assessed. The transformation pathways were concluded to be hydroxylation, nitration, and debenzophenone and ketonized reactions. Additionally, the toxicity of the by-products was evaluated by employing Chlorella and Daphnia magna.

Graphical abstract: Ozonation of ketoprofen with nitrate in aquatic environments: kinetics, pathways, and toxicity

Article information

Article type
Paper
Submitted
29 Nov 2017
Accepted
13 Feb 2018
First published
16 Mar 2018
This article is Open Access
Creative Commons BY license

RSC Adv., 2018,8, 10541-10548

Ozonation of ketoprofen with nitrate in aquatic environments: kinetics, pathways, and toxicity

Y. Zeng, X. Lin, F. Li, P. Chen, Q. Kong, G. Liu and W. Lv, RSC Adv., 2018, 8, 10541 DOI: 10.1039/C7RA12894K

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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