Measurement and thermal characterization of graywater discharge events for house-central collection systems in the context of heat recovery
Mehling, Simon; Hörnlein, Stefanie; Schnabel, Tobias; Beier, Silvio; Londong, Jörg (2024)
Water Reuse.
DOI: 10.2166/wrd.2024.054
Open Access Peer Reviewed
SYNTHESIS AND CHARACTERIZATION OF NICKEL COBALTITE SUPPORTED FILM FOR HEXAVALENT CHROMIUM PHOTOCATALYTIC REDUCTION
Cárdenas, Nataly; Alarcon, Hugo; Mehling, Simon; Schnabel, Tobias (2024)
Pro Ciencia.
DOI: 10.13140/RG.2.2.32665.74085
Open Access
Synthesis and characterization of nickel cobaltite–supported film for hexavalent chromium photocatalytic reduction
Cárdenas, Nataly; Alarcon, Hugo; Schnabel, Tobias; Mehling, Simon (2024)
Water Science & Technology.
DOI: 10.2166/wst.2024.330
Open Access Peer Reviewed
Investigation of the Effect of Oxide Additives on the Band Gap and Photocatalytic Efficiency of TiO2 as a Fixed Film
Ghiloufi, Mabrouka; Schnabel, Tobias; Mehling, Simon; Kouass, Salah (2024)
MDPI Materials 24, 4671 (17).
DOI: 10.3390/ma17184671
Open Access Peer Reviewed
Photoelektrochemische Zellen zur simultanen Energieerzeugung und Schadstoffentfrachtung
Schnabel, Tobias; Faghih Nasiri, Elaheh; Mehling, Simon (2024)
Hofer Energiesymposium 2024, Hof.
DOI: :10.13140/RG.2.2.14001.60004
Open Access
Herstellung von TiO2 -Photokatalysatoren via Sol-Gel basiertem Dip-Coating
Mehling, Simon; Wolfram, Axel; Schnabel, Tobias (2024)
PhoTech Konferenz, Weimar 2024.
DOI: :10.13140/RG.2.2.35089.85602
Open Access
Photokatalytische Luftreinigung
Martschoke, Daniel; Schnabel, Tobias; Kühmstedt, Michael (2024)
PhoTech Tagung 2024, Weimar.
DOI: :10.13140/RG.2.2.14957.19686
Open Access
SÍNTESIS Y CARACTERIZACIÓN DE PELÍCULA SOPORTADA DE COBALTITA DE NÍQUEL PARA FOTO-REDUCCIÓN DE CROMO HEXAVALENTE
Cárdenas, Nataly; Alarcon, Hugo; Mehling, Simon; Schnabel, Tobias (2024)
II Congreso Nacional de Semilleros de Investigación
II CONASEIN.
DOI: 10.13140/RG.2.2.20220.45443
Open Access
Visible Light-ActiveCopperCobaltite Supported Film for Hexavalent ChromiumPhotocatalytic Reduction
Cárdenas, Nataly; Mehling, Simon; Alarcon, Hugo; Schnabel, Tobias (2024)
Chemistry Select.
DOI: 10.1002/slct.202404596
Open Access Peer Reviewed
Abbau von Mineralölbelastungen auf Wasseroberflächen durch photokatalytisch beschichtete Schwimmkörper
Dutschke, Manuel; Wetterauer, André; Kleemann, Susanne; Schnabel, Tobias; Springer, Christian (2024)
Dutschke, Manuel; Wetterauer, André; Kleemann, Susanne; Schnabel, Tobias...
Thüringer Werkstofftage 2024, Weimar.
DOI: :10.13140/RG.2.2.32950.72008
Open Access
Untersuchungen der Adsorptivität und Reaktivität von schwimmfähigen Titandioxid-Katalysatoren
Isler, Edgar; Dutschke, Manuel; Kleemann, Susanne; Wetterauer, André; Rädlein, Edda; Schnabel, Tobias; Springer, Christian (2024)
Isler, Edgar; Dutschke, Manuel; Kleemann, Susanne; Wetterauer, André; Rädlein, Edda...
Thüringer Werkstofftage 2024, Weimar.
DOI: :10.13140/RG.2.2.29595.27683
Open Access
Low-cost test rig for characterization of photocatalytic planar materials using photonically sized UV-A LED light sources.
Schnabel, Tobias; Honke, Robert; Schmid, Andreas; Mehling, Simon; Göhring, René; Wolfram, Axel; Springer, Christian (2023)
Schnabel, Tobias; Honke, Robert; Schmid, Andreas; Mehling, Simon; Göhring, René...
2023, e00487 (16).
DOI: 10.1016/j.ohx.2023.e00487
Open Access Peer Reviewed
Combination of near-natural and innovative wastewater treatment as an effective component of sustainable water resource protection in rural areas
Müller-Czygan, Günter; Schnabel, Tobias; Aicher, Andreas; Mehling, Simon (2023)
Proceedings of the VІІІ International Scientific and Technical Conference 2023. 2023, S. 32-36.
Solare Photokatalyse mit schwimmfähigen Katalysatoren für die weitergehende Abwasserbehandlung auf kommunalen Kläranlagen
Schnabel, Tobias (2023)
KA Korrespondenz Abwasser- Abfall.
DOI: 10.3242/kae2023.05.002
Open Access Peer Reviewed
Floating immobilized TiO2 catalyst for the solar photocatalytic treatment of micro-pollutants within the secondary effluent of wastewater treatment plants
Schnabel, Tobias; Mehling, Simon (2023)
Water Science and Technology 2023 / 2 (84), S. 364–373.
DOI: 10.2166/wst.2023.066
Open Access Peer Reviewed
Photocatalytic air purification of polycyclic aromatic hydrocarbons: Application of a flow-through reactor, kinetic studies and degradation pathways
Schnabel, Tobias; Dutschke, Manuel; Schuetz, Frank; Hauser, Frank; Springer, Tobias (2022)
Journal of Photochemistry & Photobiology, A: Chemistry 430 (113993).
DOI: 10.1016/j.jphotochem.2022.113993
Open Access Peer Reviewed
This study investigates the performance of a newly developed flow-through reactor and the utilized photocatalytic materials in two environments: a lab-scale experiment and a pilot-scale experiment in a contaminated building. The aim was to assess the removal of polycyclic aromatic hydrocarbons from the air using an innovative reactor equipped with an ultraviolet-irradiated titanium dioxide catalyst. Empirical measurements were conducted in the laboratory to revise the developed fixated titanium dioxide catalysts at different irradiances. Naphthalene and 1-methylnaphthalene elimination were used as model substances due to being the most volatile polycyclic aromatic hydrocarbons (PAH). In addition, they are often found in contaminated buildings. Tests in an office building revealed high suitability of the air cleaning system for low polycyclic aromatic hydrocarbons concentrations with a degradation of the compounds below the allowed limits of indoor air pollutants set by the German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety. The degradation of the organic micropollutants proceeded without detection of by-products, so that mineralization can be assumed. Based on these observations and a large number of previous studies, detailed degradation pathways for the selected micropollutants were also established.
Entfernung von Mikroverunreinigungen an trägergebundenen Photokatalysatoren
Schnabel, Tobias (2022)
Investigation of factors influencing the photocatalytic degradation of pharmaceuticals on supported catalysts using UV-A LEDs
Schnabel, Tobias; Dutschke, Manuel; Mehling, Simon; Londong, Jörg (2022)
Chemistry Select 7 (7).
DOI: 10.1002/slct.202103759
Open Access Peer Reviewed
Supported titanium dioxide-based photocatalysts were investigated for the degradation of pharmaceuticals under irradiation with UV−A LEDs. Focus of the presented research was placed on the degradation kinetics under different matrix influences and energy flux densities of UV−A radiation. The chemical parameters, pH, orthophosphate, nitrogen concentration and background organic concentration were investigated. The results were evaluated by time-resolved measurement of the concentrations and by calculating and plotting the first-order degradation rate. The results showed clear differences in the rates of degradation of each compound, with diclofenac being the most easily degraded and metoprolol the most resistant. When the influence of energy flux density was examined, a linear relationship between degradation rate and the square root of energy flux density was confirmed. The organic background matrix has a strong influence on the degradation kinetics of the compounds. Nitrogen and orthophosphate slow down the degradation much less than the organic background matrix. Investigating the pH influence, it could be shown that almost no degradation is detected in the basic pH range. The results were illustrated with the help of a radar diagram, which can show all dependencies at a glance.
Degradation of chlorinated volatile organic compounds from contaminated ground water using a carrier-bound TiO2/UV/O3-system
Dutschke, Manuel; Schnabel, Tobias; Schütz, Frank; Springer, Christian (2022)
Journal of Environmental Managment 304.
DOI: 10.1016/j.jenvman.2021.114236
Open Access Peer Reviewed
In the present work, a suitable experimental setup was developed to successfully apply advanced oxidation processes (AOP) to real groundwater matrices. This setup combines an O3-bubble column reactor with a carrier-bound TiO2/UV-system. The degradation of various chlorinated ethene and methane derivatives commonly found of chlorinated volatile organic compound polluted regional groundwater samples was investigated. Because of known issues within water remediation using AOP such as toxification by transformation products, this study aimed at complete mineralization of the contained organic micropollutants. Moreover, the influences of variable process parameters such as flow rate, ozone concentration, and radiation dose on process performance were statistically evaluated and discussed. Parameter optimization using a Box-Behnken experimental design resulted in very promising degradation rates. It was thus possible to achieve a degradation rate of at least 98% for cis-dichloroethene, trichloroethene and tetrachloroethene and 85% for trichloromethane without formation of transformation products. The results of this work open up the possibility of developing innovative technologies based on AOP, which can be universally applied even to challenging matrices such as groundwater.
Analysis of the behavior of cumulative analytical parameters and their correlation to micro-pollutant degradation during treatment of real wastewater by carrier-bound photocatalytic ozonation
Mehling, Simon; Schnabel, Tobias; Londong, Jörg (2022)
Water Science and Technology 85 (6), S. S. 1964-1980.
DOI: 10.2166/wst.2022.053
Open Access Peer Reviewed
Immobilized titanium dioxide catalysts were used within a photocatalytic immersion rotary body reactor, which was connected to a substream ozonation unit to remove micro-pollutants from wastewater. Within this work data on the behavior of cumulative parameters during treatment of wastewater by photocatalysis and photocatalytic ozonation are provided. The investigated parameters are spectral absorption coefficient at 254 nm (SAC254), total organic carbon (TOC) and chemical oxygen demand (COD). All experiments were carried out using secondary effluent from the same wastewater treatment plant. For the parameter SAC254, consistent concentration curves and dependencies to operational parameters of the experimental system could be measured. The measurements of the parameters TOC and COD showed greater uncertainties, although basic trends could nonetheless be observed. A good linear correlation (R2 < 0.85) between the reduction of SAC254 and 8 micro-pollutants for photocatalysis and photocatalytic ozonation was found. This confirms the suitability of the SAC254 as a control parameter for a large-scale application of a photocatalytic 4th treatment stage. A linear correlation between measured TOC and COD degradation rates was possible with a coefficient of determination of 0.58–0.86. The simultaneous decrease of TOC and COD is an indicator for a mineralization of the treated wastewater matrix.
Prof. Dr. Tobias Schnabel
Hochschule für Angewandte Wissenschaften Hof
Forschungsgruppe Photonik und Wasser (PhoWa)
Alfons-Goppel-Platz 1
95028 Hof
T +49 9281 409-4410 tobias.schnabel[at]hof-university.de