Photodegradation kinetics and transformation products of ketoprofen, diclofenac and atenolol in pure water and treated wastewater

Salgado, R., Pereira, V. J., Carvalho, G., Soeiro, R., Gaffney, V., Almeida, C., Vale Cardoso, V., Ferreira, E., Benoliel, M. J., Ternes, T. A., Oehmen, A., Reis, M. A. M. and Noronha, J. P. (2013) Photodegradation kinetics and transformation products of ketoprofen, diclofenac and atenolol in pure water and treated wastewater. Journal of Hazardous Materials, 244-245 516-527. doi:10.1016/j.jhazmat.2012.10.039


Author Salgado, R.
Pereira, V. J.
Carvalho, G.
Soeiro, R.
Gaffney, V.
Almeida, C.
Vale Cardoso, V.
Ferreira, E.
Benoliel, M. J.
Ternes, T. A.
Oehmen, A.
Reis, M. A. M.
Noronha, J. P.
Title Photodegradation kinetics and transformation products of ketoprofen, diclofenac and atenolol in pure water and treated wastewater
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 0304-3894
1873-3336
Publication date 2013-01-15
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2012.10.039
Open Access Status Not yet assessed
Volume 244-245
Start page 516
End page 527
Total pages 12
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Abstract Pharmaceutical compounds such as ketoprofen, diclofenac and atenolol are frequently detected at relatively high concentrations in secondary effluents from wastewater treatment plants. Therefore, it is important to assess their transformation kinetics and intermediates in subsequent disinfection processes, such as direct ultraviolet (UV) irradiation. The photodegradation kinetics of these compounds using a medium pressure (MP) lamp was assessed in pure water, as well as in filtered and unfiltered treated wastewater. Ketoprofen had the highest time- and fluence-based rate constants in all experiments, whereas atenolol had the lowest values, which is consistent with the corresponding decadic molar absorption coefficient and quantum yield. The fluence-based rate constants of all compounds were evaluated in filtered and unfiltered wastewater matrices as well as in pure water. Furthermore, transformation products of ketoprofen, diclofenac and atenolol were identified and monitored throughout the irradiation experiments, and photodegradation pathways were proposed for each compound. This enabled the identification of persistent transformation products, which are potentially discharged from WWTP disinfection works employing UV photolysis.
Keyword Pharmaceutical compounds
Transformation pathways
Transformation products
UV photolysis
Wastewater effluent
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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Created: Wed, 09 May 2018, 16:38:40 EST by Ms Kirsty Fraser on behalf of School of Chemical Engineering