Ozonation of Sitagliptin : Removal Kinetics and Elucidation of Oxidative Transformation Products
(2020) In Environmental Science and Technology 54(17). p.10588-10598- Abstract
Due to the increasing use and high excretion rates, high quantities of the antidiabetic drug sitagliptin (STG) enter wastewater treatment plants (WWTPs). In conventional biological treatment, only a moderate removal was achieved, and thus, STG can be detected in WWTP effluents with concentrations in the higher ng/L range. Ozonation is a widely discussed technique for advanced wastewater treatment. In lab-scale experiments, STG showed pH-dependent removal kinetics with a maximum apparent rate constant of k ∼1 × 104 M-1 s-1 at pH ≥ 9. With an apparent rate constant of kO3 = (1.8 ± 0.7) × 103 M-1 s-1 at pH 8, STG can be considered to be readily degraded by ozonation of WWTP effluents. Ozone attacks the primary amine moiety of STG, leading... (More)
Due to the increasing use and high excretion rates, high quantities of the antidiabetic drug sitagliptin (STG) enter wastewater treatment plants (WWTPs). In conventional biological treatment, only a moderate removal was achieved, and thus, STG can be detected in WWTP effluents with concentrations in the higher ng/L range. Ozonation is a widely discussed technique for advanced wastewater treatment. In lab-scale experiments, STG showed pH-dependent removal kinetics with a maximum apparent rate constant of k ∼1 × 104 M-1 s-1 at pH ≥ 9. With an apparent rate constant of kO3 = (1.8 ± 0.7) × 103 M-1 s-1 at pH 8, STG can be considered to be readily degraded by ozonation of WWTP effluents. Ozone attacks the primary amine moiety of STG, leading to nitro-STG (TP 437) (the primary amine moiety is transformed into a nitro group). Furthermore, a diketone (TP 406) was formed, which can be further degraded by ozone. Lab-scale and pilot-scale experiments on ozonation of WWTP effluents confirmed that the ozone attack of STG was incomplete even at high ozone doses of 1.7 and 0.9 mg O3/mg DOC, respectively. These experiments confirmed that nitro-STG was formed as the main TP in the wastewater matrix. Two other TPs, TP 421c and TP 206b, were also detected, albeit with low intensities.
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- author
- Hermes, Nina ; Jewell, Kevin S. ; Falås, Per LU ; Lutze, Holger V. ; Wick, Arne and Ternes, Thomas A.
- organization
- publishing date
- 2020-08-11
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Environmental Science and Technology
- volume
- 54
- issue
- 17
- pages
- 11 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:32867484
- scopus:85089959317
- ISSN
- 0013-936X
- DOI
- 10.1021/acs.est.0c01454
- language
- English
- LU publication?
- yes
- id
- 0d118edc-b06f-40bd-8f80-dec2846f5a5b
- date added to LUP
- 2020-09-24 18:25:14
- date last changed
- 2024-05-01 16:43:05
@article{0d118edc-b06f-40bd-8f80-dec2846f5a5b, abstract = {{<p>Due to the increasing use and high excretion rates, high quantities of the antidiabetic drug sitagliptin (STG) enter wastewater treatment plants (WWTPs). In conventional biological treatment, only a moderate removal was achieved, and thus, STG can be detected in WWTP effluents with concentrations in the higher ng/L range. Ozonation is a widely discussed technique for advanced wastewater treatment. In lab-scale experiments, STG showed pH-dependent removal kinetics with a maximum apparent rate constant of k ∼1 × 104 M-1 s-1 at pH ≥ 9. With an apparent rate constant of kO3 = (1.8 ± 0.7) × 103 M-1 s-1 at pH 8, STG can be considered to be readily degraded by ozonation of WWTP effluents. Ozone attacks the primary amine moiety of STG, leading to nitro-STG (TP 437) (the primary amine moiety is transformed into a nitro group). Furthermore, a diketone (TP 406) was formed, which can be further degraded by ozone. Lab-scale and pilot-scale experiments on ozonation of WWTP effluents confirmed that the ozone attack of STG was incomplete even at high ozone doses of 1.7 and 0.9 mg O3/mg DOC, respectively. These experiments confirmed that nitro-STG was formed as the main TP in the wastewater matrix. Two other TPs, TP 421c and TP 206b, were also detected, albeit with low intensities. </p>}}, author = {{Hermes, Nina and Jewell, Kevin S. and Falås, Per and Lutze, Holger V. and Wick, Arne and Ternes, Thomas A.}}, issn = {{0013-936X}}, language = {{eng}}, month = {{08}}, number = {{17}}, pages = {{10588--10598}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Environmental Science and Technology}}, title = {{Ozonation of Sitagliptin : Removal Kinetics and Elucidation of Oxidative Transformation Products}}, url = {{http://dx.doi.org/10.1021/acs.est.0c01454}}, doi = {{10.1021/acs.est.0c01454}}, volume = {{54}}, year = {{2020}}, }