Download or read book Adsorption and Photocatalytic Oxidation of Pharmaceuticals Using TiO2 Under UV and Visible Light Irradiation written by Ahmed Radhi Mkaouar and published by . This book was released on 2018 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, the adsorption and the photocatalytic degradation of ibuprofen, carbamazepine, sulfamethoxazole, acetaminophen, atenolol and primidone was investigated under both UV and Visible Light irridiation using TiO2 as a catalyst. The interactions between the photocatalyst and pharmaceuticals were investigated based on their physico-chemical properties. The adsorption kinetic showed that ibuprofen exhibited the highest adsorption rate followed by sulfamethoxazole, carbamazepine, acetaminophen, atenolol and primidone resulting in the removal of 82%, 32%, 31%, 20%, 20%, and 16% respectively after 120 min adsorption. The photocatalytic activity was measured under high-pressure UV and visible light illumination without and with catalyst. The results imply that pharmaceutical compounds can absorb UV and visible light with better degradation in the presence of TiO2. Ibuprofen and carbamazepine degradation did not change with light sources, however, UV photo-catalysis was higher than visible light especially for atenolol, acetaminophen and primidone (79% acetaminophen, 61% atenolol, and 36% primidone compared to 58%, 39% and 33% for acetaminophen, atenolol and primidone respectively). Sulfamethoxazole removal on the other hand increased from 66% to 100%. These changes can be explained by the pharmaceuticals'' adsorption capacity under different wavelengths. Both UV and visible light photo-oxidation reactions fitted the Langmuir-Hinshelwood pseudo-first-order kinetics model. The highest photodegradation rate was for ibuprofen (8.443 min−1 UV light and 0.033 min−1 visible light) and the lowest was shown by primidone (0.217 min−1 UV light and 0.0029 min−1 visible light).
Download or read book Heterogeneous Photocatalysis written by M. Schiavello and published by . This book was released on 1997-10-09 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysis is a reaction which is accelerated by light while a heterogeneous reaction consists of two phases ( a solid and a liquid for example). Heterogeneous Photocatalysis is a fast developing science which to date has not been fully detailed in a monograph. This title discusses the basic principles of heterogeneous photocatalysis and describes the bulk and surface properties of semiconductors. Applications of various types of photoreactions are described and the problems related to the modeling and design of photoreactors are covered.
Download or read book Clean by Light Irradiation written by Vincenzo Augugliaro and published by Royal Society of Chemistry. This book was released on 2010 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals with the environmentally friendly cleaning materials functionalized with TiO2, a widely known semiconductor giving rise to redox reactions under artificial or solar irradiation. The role of titanium dioxide in the worldwide community is introduced first. The fundamental working principles of heterogeneous photocatalysis follow and a critical section on the semiconductor bulk and surface properties open the way to the differences between TiO2 blend features with respect to analogous thin film layouts. Then Follows the main section of the book which deals with the techniques applied to manufactured commercial devices, ranging from glasses to textiles and from concrete and other construction materials to paintings. Also road asphalt and other devices, such as photocatalytic air conditioning machines are outlined. Last generation materials, not yet commercialized, and the deposition techniques applied to prepare them are also widely discussed. The final part of the book covers the difficult and modern topic of standardization and comparison of performance of photocatalytic processes and in particular the guidelines proposed by various worldwide organizations for standardization are discussed. The book covers the general matters as well as the practical applications with the supporting methods discussed in detail. This book brings together a team of highly experienced and well-published experts in the field, providing a comprehensive view of the applications of supported titanium dioxide.
Download or read book Photocatalytic Activity Enhancement of Titanium Dioxide Nanoparticles written by Mohamed A. Barakat and published by Springer. This book was released on 2015-10-26 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this brief, a comprehensive review of the UV/visible-TiO2 photocatalytic oxidation process is presented with an insight into the mechanisms involved, the role of titanium dioxide as a catalyst, irradiation sources, types of reactors, and a comparison between various modes of TiO2 application. An overview of the development and enhancement of the activity of TiO2 nanoparticles in photocatalysis is presented. The topics covered include a detailed look at the unique properties of the TiO2 nanoparticles and their relationship to photocatalytic properties. The utilization of the TiO2 nanoparticles as photocatalysts, in the non-doped and doped forms is also reviewed. Finally, the use of modified TiO2 nanoparticles has made a significant contribution in providing definitive mechanistic information regarding the visible light photocatalytic processes.
Download or read book Photocatalytic Oxidation of Air Toxics Via Visible Light Irradiation and Nano photocatalysts written by Ruh Ullah and published by . This book was released on 2012 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis explores synthesis of various types of metal oxide nanoparticles through a wet-chemical synthesis route. The materials were used for photocatalytic oxidation of gaseous toluene irradiated with UV, artificial solar light, and pure visible light. Tantalum based compounds like BiTaO4: La, BiNbO4: Ga and Ta2O5 have shown better performance than a commercial TiO2 under UV and solar light. Ta2O5 and nitrogen doped Ta2O5 have shown excellent performance for toluene oxidation with solar and visible light.
Download or read book Applications of Photocatalytic Oxidation Using TiO2 written by Sho Kataoka and published by . This book was released on 2003 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photocatalytic Oxidation of Cytostatic Drugs Via Uv and Visible Light Responsive TiO2 in the Aqueous Environment written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photocatalytic Oxidation of NO Over Composites of Titanium Dioxide and Zeolite ZSM 5 Under Ultraviolet and Visible Light Irradiation written by Akram Tawari and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photocatalysis written by Suresh C. Pillai and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-08-23 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a concise and up-to-date introduction to the topic of photocatalysis. It covers the fundamentals of photocatalysis, design of photoreactors and modelling and simulations for photoreaction. Also, industrial applications such as hydrogen production, water disinfection, degradation of air pollutants, pesticides and pharmaceuticals are described.
Download or read book Visible Light Active Structured Photocatalysts for the Removal of Emerging Contaminants written by Olga Sacco and published by Elsevier. This book was released on 2019-09-11 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Visible Light Active Structured Photocatalysts for the Removal of Emerging Contaminants: Science and Engineering addresses the potential role of visible active photocatalytic processes for the removal of emerging contaminants. The book discusses the classification, sources and potential risks of emerging pollutants in water as well as the different synthesis methods of visible active structured photocatalysts with relation to their applications in photocatalytic processes for the removal of organic and inorganic emerging contaminants. Finally, the possible reaction pathways occurring during the visible or solar photocatalytic processes together with toxicity assessment are discussed. The book is a useful guide for academics, researchers and technicians in chemical engineering, chemistry and environmental sciences. - Defines emerging contaminants and what can be included in that group of contaminants commonly named "contaminants of emerging concern" - Presents different synthesis methods of visible active structured photocatalysts and their applications in solar or visible light photocatalytic systems for the removal of organic and inorganic emerging contaminants - Analyzes reaction pathways that occur during the visible or solar photocatalytic processes, also including toxicity assessments
Download or read book Carbon Nanomaterials for Agri food and Environmental Applications written by Kamel A Abd-Elsalam and published by Elsevier. This book was released on 2019-11-14 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Nanomaterials for Agri-food and Environmental Applications discusses the characterization, processing and applications of carbon-based nanostructured materials in the agricultural and environmental sectors. Sections discuss the synthesis and characterization of carbon nanotubes, the technological developments in environmental applications of carbon-based nanomaterials, and agri-food applications. The book also covers the toxic effects of engineered carbon nanoparticles on the environment, and in plants and animals. Finally, quality control and risk management are addressed to assess health and environmental risks. This is an applicable book for graduate students, researchers and those in industrial sectors of science and technology who want to learn more about carbon nanomaterials. - Compares a range of carbon-based nanomaterials, showing how they are used for a range of agricultural and environmental applications - Discusses the challenges and toxicity of different types of carbon-based nanomaterials for environmental and agricultural applications - Explores when different classes of nanomaterial should be used in different environments
Download or read book Advanced Oxidation Processes for Wastewater Treatment written by Maulin P Shah and published by CRC Press. This book was released on 2022-03-09 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Oxidation Processes for Wastewater Treatment: An Innovative Approach: This book highlights the importance of various innovative advanced oxidation technology to clean up the environment from pollution caused by human activities. It assesses the potential application of several existing bioremediation techniques and introduces new emerging technologies. This book is an updated vision of the existing advanced oxidation strategies with their limitations and challenges and their potential application to remove environmental pollutants. It also introduces the new trends and advances in environmental bioremediation technology with thorough discussion of recent developments in this field. This book highlights the importance of different innovative advanced oxidation process to deal with the ever-increasing number of environmental pollutants. Features: Illustrates the importance of various advance oxidation processes in effluent treatment plant Points out the reuse of the treated wastewater through emerging advance oxidation technologies for effluent treatment plant Highlights the recovery of resources from wastewater Pays attention to the occurrence of novel micro-pollutants Emphasizes the role of nanotechnology in bioremediation of pollutants Introduces new trends in environmental bioremediation
Download or read book Photocatalysts written by Sher Bahadar Khan and published by BoD – Books on Demand. This book was released on 2019-03-06 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book enlightens the type, chemical structure, and application of photo-catalysts. It covers the recent developments in photo-catalysts and their applications, particularly in photo-catalytic degradation of different organic pollutants, hydrogen production, etc. It provides a concise but complete coverage and overview of photocatalysts and their recent advances for a broad audience: beginners, graduate students, and specialists in both academic and industrial sectors.
Download or read book Photocatalytic Purification and Treatment of Water and Air written by David F. Ollis and published by Elsevier Publishing Company. This book was released on 1993 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprises the results of the first international conference examining the promise of the emerging area of photochemistry. It includes coverage of such areas as: comparison with other competitive technologies; and transfer of research results into development and application activities.
Download or read book Advances in Photocatalytic Disinfection written by Taicheng An and published by Springer. This book was released on 2016-11-21 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest results related to photocatalytic inactivation/killing of microorganisms, which is a promising alternative disinfection method that produces less or even no disinfection byproduct. The book is divided into 13 chapters, which introduce readers to the latest developments in the photocatalytic disinfection of microorganisms, examine essential photocatalytic (PC) and photoelectrocatalytic (PEC) disinfection studies, and forecast and make recommendations for the further development of PC and PEC disinfection. Bringing together contributions by various leading research groups worldwide, it offers a valuable resource for researchers and the industry alike, as well as the general public. Taicheng An, PhD, is Chair Professor and Director at the Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, China. Huijun Zhao, PhD, is Chair Professor and Director at the Centre for Clean Environment and Energy & Griffith School of Environment, Griffith University, Australia. Po Keung Wong, PhD, is a Professor at the School of Life Sciences, the Chinese University of Hong Kong, Hong Kong SAR, China.
Download or read book Alumina titania Particles for the Heterogeneous Photocatalytic Oxidation of Ciprofloxacin written by Celina Susie-Marie Dozier and published by . This book was released on 2016 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: The global presence of xenobiotic organic compounds, such as pharmaceuticals and personal care products (PPCPs), in drinking water supplies and wastewater effluents has raised concerns regarding their potential effects on aquatic life, human health, and antibacterial resistance. Traditional treatment systems, not specifically designed to target removal of these compounds, vary with respect to their ability to remove PPCPs. Therefore, research focused on the development and optimization of treatment processes that can remove PPCPs is warranted. Advanced oxidation processes (AOP) have been shown to be effective at degrading a number of pharmaceuticals. These processes are defined by the production of radicals, such as superoxide and hydroxyl radicals, which are highly reactive and can, therefore, oxidize target contaminants more effectively than common oxidants such as ozone and ultraviolet (UV) light. One such AOP is photocatalysis, in which the radicals are created by the illumination of a photocatalyst. Photocatalysis has been previously demonstrated for degradation of the antibiotic ciprofloxacin, the selected pharmaceutical in this research. In this work, the impact of sorption on the photocatalysis of ciprofloxacin was studied by developing a mixed phase photocatalyst that optimized sorption. Titanium dioxide (TiO2) is a commonly used photocatalyst. However, TiO2 particles have limited surface area and varying affinity for ciprofloxacin as a function of pH. Aluminum oxide (Al2O3) was chosen as the sorbent to mix with the TiO2 due to its ability to sorb ciprofloxacin over the pH range of natural waters and its ability to prevent the recombination of photo-generated electron-hole pairs, which are vital for the production of hydroxyl radicals. The particles were synthesized using pure TiO2 and other particles that ranged in aluminum oxide content (68% - 100% by mass) using a sol-gel process to achieve high surface areas. The 100% TiO2 particle was pure anatase, while the mixtures and the 100% Al2O3 particle consisted gamma-alumina and anatase when the titania was present. Sorption was found to be pH dependent for both Al2O3 and TiO2 with maximum adsorption at pH 6 and 7, respectively. The synthesized particles resulted in linear equilibrium sorption constants at fixed pH that varied with alumina content, with the 90% alumina material adsorbing the most at pH 8 due to its high surface area. Photocatalysis using the synthesized particles under UV irradiation at 365 nm effectively oxidized ciprofloxacin and the rates were faster than photolysis, but slower than the standard photocatalyst Degussa P25 TiO2 and synthesized pure TiO2. Sorption followed the Langmuir isotherm and oxidation followed first order kinetics if the assumption of low concentration (relative to the Langmuir sorption coefficient) was applied, typical of environmental conditions. Experiments revealed that rapid exchange of ciprofloxacin with pure TiO2 occurred as rate constants determined from aqueous phase concentrations were comparable to rate constants determined by monitoring the concentration of ciprofloxacin within the total reactor (surface and aqueous phases). In contrast, differences between rate constants measured by these two methods suggest that at high aluminum contents a fraction of the sorbed ciprofloxacin was not rapidly accessible to the oxidant. Nevertheless, the ability to temporally separate adsorption and photocatalysis was demonstrated which lays the foundation for optimizing this treatment scheme for ciprofloxacin removal from water.
Download or read book Nanostructured Titanium Dioxide Materials written by Ali Reza Khataee and published by World Scientific. This book was released on 2012 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past decade, research and development in the area of synthesis and applications of different nanostructured titanium dioxide have become tremendous. This book briefly describes properties, production, modification and applications of nanostructured titanium dioxide focusing in particular on photocatalytic activity. The physicochemical properties of nanostructured titanium dioxide are highlighted and the links between properties and applications are emphasized. The preparation of TiO2 nanomaterials, including nanoparticles, nanorods, nanowires, nanosheets, nanofibers, and nanotubes are primarily categorized by their preparation method (sol-gel and hydrothermal processes). Examples of early applications of nanostructured titanium dioxide in dye-sensitized solar cells, hydrogen production and storage, sensors, rechargeable batteries, electrocatalysis, self-cleaning and antibacterial surfaces and photocatalytic cancer treatment are reviewed. The review of modifications of TiO2 nanomaterials is mainly focused on the research related to the modifications of the optical properties of TiO2 nanomaterials, since many applications of TiO2 nanomaterials are closely related to their optical properties. Photocatalytic removal of various pollutants using pure TiO2 nanomaterials, TiO2-based nanoclays and non-metal doped nanostructured TiO2 are also discussed.
