نتایج جستجو برای: heterogeneous catalytic ozonation process

تعداد نتایج: 1485549  

Journal: :Ozone: Science & Engineering 2015

Journal: :Catalysts 2023

The number of organic pollutants detected in water and wastewater is continuously increasing thus causing additional concerns about their impact on public environmental health. Therefore, catalytic processes have gained interest as they can produce radicals able to degrade recalcitrant micropollutants. Specifically, ozonation has received considerable attention due its ability achieve advanced ...

Mir Khan , U., Selamoglu, Z.,

Textile wastewater is characterized by strong color, saturation of unfixed dyes and their residues, and organic and inorganic chemicals, such as bleaches, detergents, optical brighteners, fixing, sequestering and finishing agents, carriers, surfactants, equalizers, It is characterized by consumption of high amount of water and production of large volumes of wastewater from various processes, su...

Mona Hosseini-Sarvari, Sepideh Najafvand-Derikvandi

Nano sulfated titania was tested as solid acid heterogeneous catalyst for the synthesis of 4-(Trifluoromethyl) coumarin and coumarin derivatives under solvent-free condition. Factorial design evidenced a positive effect of reaction temperature, amount of catalyst, and solvents.  This nano-sized sulfated titania has been prepared by a sol-gel hydrothermal process. The prepared sulfated titania s...

2009
A. L. C. Peixoto M. B. Silva

Catalytic ozonation has been recognized in the scientific community as an efficient technique, reaching elevated rates of recalcitrant organic material mineralization, even at the presence of scavenger species of hydroxyl free radicals. This study presents the most significant factors involving the leachate treatment stabilized by the municipal landfill of the city of Guaratinguetá, State of Sã...

Mona Hosseini-Sarvari, Sepideh Najafvand-Derikvandi

Nano sulfated titania was tested as solid acid heterogeneous catalyst for the synthesis of 4-(Trifluoromethyl) coumarin and coumarin derivatives under solvent-free condition. Factorial design evidenced a positive effect of reaction temperature, amount of catalyst, and solvents.  This nano-sized sulfated titania has been prepared by a sol-gel hydrothermal process. The prepared sulfated titania s...

Journal: :Catalysts 2023

This study aims to investigate the treatment of real textile wastewater using a novel bentonite clay/TiO2/ZnO-based ozonation catalyst. In this study, synergic electroflocculation/catalytic ozonation, catalytic and processes are applied in modified hybrid reactor. To authors’ knowledge, is first application clay/TiO2/ZnO as an catalyst for treating wastewater. The four operational variables—ozo...

2009
R. Rajeswari

The degradation of pesticide Carbendazim was investigated by combination of TiO2-based photocatalysis and ozonation. A batch annular photoreactor has been used for carrying out the combined process and the influence of TiO2 concentration, ozone dose and pH were investigated. The results showed that the removal rate increased with increase in ozone dosage upto 0.48 g/h and decreased above 1g/L o...

2014
Veronica Camargo Elba Ortiz Hugo Solis Carlos M. Cortes-Romero Sandra Loera-Serna Carlos J. Perez

The experimental degradation of a water soluble dye, potassium indigo tetrasulfonate salt, has been studied using stand-alone ozonation and photocatalytic oxidation process. Progress of the dye oxidation was followed by UV-VIS spectrophotometric measurements at controlled operating conditions. The organic content of reaction samples was measured to verify the process efficiency in dye mineraliz...

Journal: :Journal of advanced sciences and engineering technologies 2023

In this study, the catalytic ozonation of pentachlorophenol (PCP) in presence aluminum oxide (Al2O3) and formation byproducts during ozonationhas been studied. Results showed that Al2O3 can substantially enhance PCP degradation efficiency compared with using only process. The influences severalenvironmental parameters including pH solution, initial concentration, dosage dissolved ozone concentr...

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