A5006340854- Advanced oxidation water treatment
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Pharmaceutical and Antibiotic Environmental Impacts
- Water Quality Monitoring and Analysis
- Atmospheric chemistry and aerosols
- Electrochemical Analysis and Applications
- Catalytic Processes in Materials Science
- Analytical chemistry methods development
- Advanced Nanomaterials in Catalysis
- Insect and Pesticide Research
- Free Radicals and Antioxidants
- Neuroendocrine regulation and behavior
- Drug Solubulity and Delivery Systems
- Gas Sensing Nanomaterials and Sensors
- Photochemistry and Electron Transfer Studies
- Laser-Ablation Synthesis of Nanoparticles
- Water Treatment and Disinfection
- Silymarin and Mushroom Poisoning
- Impact of Light on Environment and Health
- Mercury impact and mitigation studies
- bioluminescence and chemiluminescence research
- Antibiotic Use and Resistance
- Advanced Drug Delivery Systems
- Stress Responses and Cortisol
University of Szeged
2015-2024
Transformation of coumarin (COU) and coumarin-3-carboxylic acid (3-CCA), the formation their fluorescent hydroxylated products, (7-hydroxy-coumarin (7-HO-COU) 7-hydroxy-3-carboxycoumarinic (7-HO-3-CCA)) were investigated compared using three different advanced oxidation processes: gamma radiolysis, VUV (172 nm) photolysis heterogeneous photocatalysis (TiO2/UV (300–400 nm)). Beside •OH (hydroxyl radical), other reactive species: H• (H-atom, in irradiated aqueous solution radiolysis with low...
Pharmaceuticals and pesticides are emerging contaminants problematic in the aquatic environment because of their adverse effects on life humans. In order to remove them from water, photocatalysis is one most modern technologies be used. First, newly synthesized photocatalysts were successfully prepared using a sol–gel method characterized by different techniques (XRD, FTIR, UV/Vis, BET SEM/EDX). The photocatalytic properties TiO2, ZnO MgO nanoparticles examined according removal water for...
Various types of advanced oxidation processes (AOPs), such as UV photolysis, ozonation, heterogeneous photocatalysis and their combinations were comparatively examined at the same energy input in a home-made reactor. The oxidative transformations phenylurea herbicides fenuron, monuron diuron investigated. initial rates transformation demonstrated that photolysis was highly efficient cases monuron. Ozonation proved to be much more effective fenuron than those chlorine containing diuron. In...
BiOI, BiOCl, and their composites (BiOI:BiOCl) with molar ratios from 95:5 to 5:95 were synthesized tested in the transformation of methyl orange (MO) sulfamethoxypyridazine (SMP) antibiotic, using three various LED light sources: UV LEDs (398 nm), cool warm white (400–700 nm). The 80:20 BiOI:BiOCl photocatalyst showed best adsorption capacity for MO enhanced activity compared BiOI BiOCl. apparent quantum yield (Φapp) SMP was slightly lower than 398 nm radiation. effect methanol...
In this work, the application of high-power LED365nm and commercial, low-price LED398nm for heterogeneous photocatalysis with TiO2 ZnO photocatalysts are studied compared, focusing on effect light intensity, photon energy, quantum yield, electrical energy consumption, matrices inorganic components radical formation. Coumarin (COU) its hydroxylated product (7-HC) were used to investigate operating parameters •OH formation rate. addition COU, two neonicotinoids, imidacloprid thiacloprid, also...
The persulfate-based advanced oxidation processes employing heterogeneous photocatalysts to generate sulfate radicals (SO4•−) from peroxydisulfate ion (PDS, S2O82−) have been extensively investigated remove organic pollutants. In this work, BiOX (X = Cl, Br, and I) were activate PDS enhance the transformation rate of various substances under UV (398 nm) Vis (400–700 radiation. For BiOCl BiOBr, in addition excitability, light-induced oxygen vacancies are decisive activity. Although without...
The efficiency of UV-photolysis, ozonation, their combination and heterogeneous photocatalysis was investigated compared in various matrices.
The chlorination used in water treatment plants can promote the formation of toxic compounds, which be minimized by substituting free available chlorine (FAC) with dioxide (ClO2). Besides disinfection, combining ClO2 UV radiation leads to efficient elimination organic substances. This work employed a lab-made reactor equipped LEDs emitting at 367 nm adjustable photon flux investigate efficiency UVA/ClO2 process and hydroxylated chlorinated products during degradation phenol coumarin....
Abstract In the present study, a commercial TiO 2 , several BiVO 4 photocatalysts, WO 3 nanomaterial, and their composites were used to prepare photocatalytic polyvinylidene fluoride (PVDF) ultrafilter membranes. Their activities effects of coatings on filtration oil‐in‐water emulsion (crude oil; c oil = 100 mg L −1 ) investigated. Fluxes, resistances, purification efficiencies, fouling resistance abilities—like flux decay ratios (FDRs) recovery (FRRs)—were compared. The solar light‐induced...
The persulfate-based advanced oxidation process is a promising method for degrading organic pollutants. Herein, TiO2 and ZnO photocatalysts were combined with the peroxydisulfate ion (PDS) to enhance efficiency. was significantly more efficient in PDS conversion SO4•- generation than TiO2. For ZnO, increased transformation rate of trimethoprim antibiotic from 1.58 × 10-7 M s-1 6.83 s-1. However, case TiO2, moderated positive effect manifested mainly O2-free suspensions. impact dissolved O2...
This comparative study is about the heterogeneous photocatalytic degradation of two neonicotinoids, namely imidacloprid and thiacloprid, focusing on differences similarities in their transformation mineralization effect various additives, matrices, inorganic components. Besides dominant role •OH, which was confirmed by pH radical scavengers, direct charge transfer may also contribute to transformation, especially for imidacloprid; partly due its enhanced interaction with TiO2 surface. There...