期刊
CHEMICAL ENGINEERING JOURNAL
卷 334, 期 -, 页码 976-984出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.10.045
关键词
Ibuprofen; TiO2; Municipal wastewater; Pharmaceutical industry wastewater; UV-LEDs; Acute toxicity
资金
- project AIProcMat@N2020 - Advanced Industrial Processes and Materials for a Sustainable Northern Region of Portugal
- Norte Portugal Regional Operational Programme (NORTE) through the European Regional Development Fund (ERDF) [NORTE-01-0145-FEDER-000006]
- Associate Laboratory LSRE-LCM - ERDF through COMPETE - Programa Operacional Competitividade e Internacionalizacao (POCI) [POCI-01-0145-FEDER-006984]
- FCT - Fundacao para a Ciencia e a Tecnologia
- FCT [IF/01248/2014, IF/01501/2013, SFRH/BPD/101703/2014, PD/BD/114318/2016]
- European Social Fund
- Human Potential Operational Program
- Human Potential Operational Programme
- Tunisian Ministry of Higher Education and Scientific Research
- Sfax University
- Fundação para a Ciência e a Tecnologia [PD/BD/114318/2016] Funding Source: FCT
Degradation and mineralization of ibuprofen (IBU) were investigated using Ultraviolet (UV) Light Emitting Diodes (LEDs) in TiO2 photocatalysis. Samples of ultrapure water (UP) and a secondary treated effluent of a municipal wastewater treatment plant (WWTP), both spiked with IBU, as well as a highly concentrated IBU (230 mg L-1) pharmaceutical industry wastewater (PIWW), were tested in the TiO2/UV-LED system. Three operating parameters, namely, pH, catalyst load and number of LEDs were optimized. The process efficiency was evaluated in terms of IBU removal using high performance liquid chromatography (HPLC) and ultra-high performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS). Additionally, the mineralization was investigated by determining the dissolved organic carbon (DOC) content. The chemical structures of transformation products were proposed based on the data obtained using liquid chromatography with a high resolution mass spectrometer ion trap/time-of-flight (LC-MS-IT-TOF). A possible pathway of IBU degradation was accordingly suggested. Bioassays were performed using the marine bacterium Vibrio fischeri to evaluate the potential acute toxicity of original and treated wastewaters. TiO2 heterogeneous photocatalysis was efficient to remove IBU from UP and from PIWW, and less efficient in treating the wastewater from the municipal WWTP. The acute toxicity decreased by ca. 40% after treatment, regardless of the studied matrix.
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