scholarly journals Quantitative and Qualitative Analysis of Organic Halogenated Compounds Unintentionally Generated in Wastewater Treatment Plants using Liquid Chromatography/Mass Spectrometry and High-Resolution Mass Spectrometry

2017 ◽  
Vol 27 (4) ◽  
pp. 137-144
Author(s):  
Mari TAKAZAWA ◽  
Shigeru SUZUKI ◽  
Takeshi NAKANO ◽  
Shinji TSUNOI ◽  
Miho SHINOMIYA
Keyword(s):  
Mass Spectrometry ◽  
Wastewater Treatment ◽  
Liquid Chromatography ◽  
High Resolution ◽  
Qualitative Analysis ◽  
Wastewater Treatment Plants ◽  
High Resolution Mass Spectrometry ◽  
Liquid Chromatography Mass Spectrometry ◽  
Organic Halogenated Compounds ◽  
Resolution Mass

scholarly journals Photocatalytic Treatment of Pharmaceuticals in Real Hospital Wastewaters for Effluent Quality Amelioration

Water ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2165 ◽  
Author(s):  
Konstas ◽  
Kosma ◽  
Konstantinou ◽  
Albanis
Keyword(s):  
Mass Spectrometry ◽  
Wastewater Treatment ◽  
Liquid Chromatography ◽  
High Resolution ◽  
Carbon Nitride ◽  
High Resolution Mass Spectrometry ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Hospital Wastewater ◽  
Resolution Mass

The presence of pharmaceutically active compounds (PhACs) in the wastewater effluents has confirmed that conventional wastewater treatment technologies are not sufficiently effective in the pharmaceuticals’ removal. The objective of the present study was to evaluate and compare the photocatalytic degradation of PhACs using TiO2-P25, graphitic carbon nitride (g-C3N4, CN) and a heterojunction of perovskite strodium titanate and graphitic carbon nitride SrTiO3/g-C3N4 (20% g-C3N4, 20CNSTO) photocatalytic materials, in hospital wastewater effluents, by simulated solar irradiation. The experiments were performed by using real wastewater samples collected from the university hospital wastewater treatment plant (WWTP) effluent of Ioannina city (Northwestern Greece) and inherent pharmaceutical concentration levels. The analysis of the samples was accomplished by solid phase extraction followed by liquid chromatography-Orbitrap high-resolution mass spectrometry. In the cases of TiO2 and CN, more than 70% of the initial concentration (e.g., venlafaxine) was degraded after 90 min, while 20CNSTO presented lower photocatalytic performance. Furthermore, some compounds were sporadically detected (e.g., fluoxetine) or their concentrations remained stable during the photocatalytic treatment time period (e.g., trimethoprim). In total 11 transformation products (TPs) were formed along the degradation processes and were identified by using liquid chromatography high resolution mass spectrometry.

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