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Title:Diclofenac removal by simulated solar assisted photocatalysis using TiO2-based zeolite catalyst; mechanisms, pathways and environmental aspects
Authors:ID Salaeh, Subhan, University of Zagreb, Prince of Songkla University (Author)
ID Juretic Perisic, Daria, University of Zagreb (Author)
ID Biosic, Martina, University of Zagreb (Author)
ID Kušić, Hrvoje, Universiy of Zagreb (Author)
ID Babich, Sandra, University of Zagreb (Author)
ID Lavrenčič Štangar, Urška, University of Nova Gorica (Author)
ID Dionysiou, Dionysios D., University of Cincinnati (Author)
ID Lončarić Božić, Ana, University of Zagreb (Author)
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:The study explores the potential of immobilized TiO2-based zeolite composite photocatalyst (TiO2-FeZ) made of commercial AEROXIDE TiO2 P25 and iron-exchanged zeolite of ZSM5 type (FeZ), for solar assisted treatment of diclofenac (DCF), pharmaceutical included in the ‘‘watch list” during last prioritization in water legislation by EU. In this study the efficiency of applied photocatalytic treatment, solar/TiO2-FeZ/H2O2, of DCF water solution was evaluated on basis of DCF removal and conversion kinetics, as well as the changes of common parameters for assessing water quality. Hence, the changes in the removal and mineralization of overall organic content, biodegradability, toxicity to Vibrio fischeri, dechlorination of DCF and its formed by-products, were monitored during the treatment. The obtained data were correlated with the evolution of DCF by-products, identified and monitored during the treatment by HPLC/MSMS analysis. In order to estimate the influence of water matrix, all experiments were performed in the presence of chloride or sulphate as counter ions. The obtained data revealed that degradation mechanism of DCF by applied treatment process using immobilized TiO2-FeZ includes the adsorption onto photocatalyst surface and consequent degradation. The contribution of homogeneous Fenton reaction due to leached iron ions was found to be negligible. The adsorption and degradation pathway of DCF were influenced by the type of counter ions, which was reflected in the observed changes of water quality parameters.
Keywords:Solar photocatalysis, TiO2-FeZ catalyst, Diclofenac, Degradation pathway, Biodegradability, Toxicity
Publication version:Version of Record
Year of publishing:2016
Number of pages:289-302
Numbering:304
PID:20.500.12556/RUNG-2517 New window
COBISS.SI-ID:4442875 New window
DOI:10.1016/j.cej.2016.06.083 New window
NUK URN:URN:SI:UNG:REP:ELDMBVIE
Publication date in RUNG:21.07.2016
Views:5432
Downloads:0
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Record is a part of a journal

Title:Chemical Engineering Journal
Shortened title:Chem. Eng. J.
Publisher:Elsevier
Year of publishing:2016
ISSN:1385-8947

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