研究目的
Investigating the degradation of Prozac? using a microwave discharge electrodeless mercury lamp (Hg-MDEL) through energetic, mechanistic, and kinetic approaches.
研究成果
The Hg-MDEL reactor is an efficient hydroxyl radical generator, enabling high degradation rates of Prozac? with low energy consumption. Degradation follows pseudo-first-order kinetics, and the process involves both direct photolysis and radical oxidation mechanisms. The system achieves over 99% removal within 0.75 min, demonstrating potential for practical applications in wastewater treatment.
研究不足
The kinetics should be limited to times up to 0.50 min due to interference from transformation products. The study may not fully account for all degradation by-products, and the system's efficiency could be influenced by operational parameters not fully explored.
1:Experimental Design and Method Selection:
The study used a photochemical reactor with an Hg-MDEL for photodegradation of fluoxetine (Prozac?). Methods included photolytic and kinetic assays, hydroxyl radical quantification using coumarin and its hydroxylated products, and analysis of degradation mechanisms.
2:Sample Selection and Data Sources:
Prozac? solutions at concentrations of 33, 101, and 134 μmol L-1 were prepared from stock solutions. Coumarin (COU), 7-hydroxycoumarin (7HC), and 4-hydroxycoumarin (4HC) were used for hydroxyl radical studies. All solutions were prepared with analytical grade chemicals and ultra-pure water.
3:List of Experimental Equipment and Materials:
Equipment included a MARS 6 microwave system (CEM), Hg-MDEL lamp (UMEX GmbH), spectroradiometer SPR-4002 (Luzchem), HPLC Agilent 1220 Infinity LC (Agilent) with Zorbax Eclipse Plus C18 column, digital potentiometer Luca 210 (Lucadema), and selective ion electrode for fluoride. Reagents included Prozac?, coumarin derivatives, acetonitrile, methanol, DMSO, and phosphate buffer.
4:Experimental Procedures and Operational Workflow:
Samples were irradiated in the Hg-MDEL reactor with varying microwave powers (10 to 1800 W) and times (up to 2.0 min). After irradiation, samples were analyzed by HPLC-UV/Vis for compound quantification, and fluoride and pH were measured. Hydroxyl radical formation was assessed through COU degradation and 7HC/4HC formation.
5:0 min). After irradiation, samples were analyzed by HPLC-UV/Vis for compound quantification, and fluoride and pH were measured. Hydroxyl radical formation was assessed through COU degradation and 7HC/4HC formation. Data Analysis Methods:
5. Data Analysis Methods: Kinetic data were fitted to pseudo-first-order models. Hydroxyl radical concentration was calculated using specific equations. Energy consumption was computed based on power and time.
独家科研数据包,助您复现前沿成果,加速创新突破
获取完整内容-
Zorbax Eclipse Plus C18
4.6 x 250 mm, 5 μm
Agilent
Chromatographic column for separation.
-
MARS 6
220V, 60Hz
CEM
Microwave system used for irradiation experiments.
-
Hg-MDEL
UMEX GmbH
Microwave discharge electrodeless mercury lamp for photodegradation.
-
SPR-4002
Luzchem
Spectroradiometer for measuring radiation spectra.
-
HPLC Agilent 1220 Infinity LC
Agilent
Chromatographic analysis of samples.
-
Luca 210
Lucadema
Digital potentiometer for pH monitoring.
-
Milli-Q Plus
Millipore
Water purification system.
-
登录查看剩余5件设备及参数对照表
查看全部