Preparation, Characterization and Photocatalytic Applications of Immobilized Polyaniline Coated Titania Composite for the Removal of Dye and Diuron from Aqueous Solution PDF Download
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Author: Mohd Fairul Sharin Abdul Razak
Publisher:
ISBN:
Category : Dyes and dyeing
Languages : en
Pages : 382
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Book Description
Author: Mohd Fairul Sharin Abdul Razak
Publisher:
ISBN:
Category : Dyes and dyeing
Languages : en
Pages : 382
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Book Description
Author: Inamuddin
Publisher: Springer Nature
ISBN: 303054723X
Category : Science
Languages : en
Pages : 443
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Book Description
In the context of climate change and fossil fuel pollution, solar energy appears as a cheap and sustainable fuel for many environmental applications, yet the efficiency of techniques has to be improved. This book reviews recent methods and applications of photocatalysis for the treatment of wastewater containing bacteria, heavy metals, organic pollutants, dyes and tannery effluents. Basics of water pollution, polluted river ecosystems and membranes are also detailed.
Author: Maksym Zahornyi
Publisher: Cambridge Scholars Publishing
ISBN: 1527578992
Category : Science
Languages : en
Pages : 275
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Book Description
This book discusses recent advances in the photocatalytic and electrophotocatalytic applications of titanium dioxide nanocomposites containing polymers and other components. These materials possess photocatalytic, virucidal and antimicrobial efficacy and water and air cleaning abilities against eco-toxicants, and allow water splitting for the generation of chemical fuels. The book considers the ability of nanocomposites’ components to reinforce titania functionality in photocatalysis and photoelectrocatalysis, and presents an overview of their occurrence in nature, their thermodynamic properties, and their toxicity. The volume will be of interest to chemists and material science specialists and practitioners, as well as any reader interested in the recent scientific achievements for green and sustainable development.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The photocatalytic degradation of adsorbed organic dyes in air is reported with the goal of color removal for potential catalyst characterization and application in self-cleaning surfaces. In this study, a laboratory photoreactor equipped with 8 GE Blacklight Blue 20W lamps (peak emission at 365 nm) was the source for near-UV exposure of dye-coated Degussa P25 titanium dioxide (TiO2) particles as well as dye coated photo-inert aluminum oxide (Al2O3) particles used for control experiments. The average UVA intensity of exposure for all experiments was 1.3 mW cm−2. Dyes were adsorbed onto catalyst particles and inert supports in aqueous solution, and the coated particles were captured by centrifugation, dried, and hand ground to powder before near-UV exposure. The dyes included in this study were Acid Blue 9, Acid Orange 7, Reactive Black 5 and Reactive Blue 19. Sub-monolayer initial dye coverage of support particles was used. Visual evidence of color removal was recorded with digital photographic images of samples before near-UV illumination and after exposure. Two methods, Indirect and Direct Analysis, were employed to quantitatively examine the decolorization of organic dyes with near-UV exposure. During illumination with the Indirect method, dye-coated powder samples were subject to ambient humidity and were shaken in uncovered Petri dishes in attempt to achieve uniform near-UV exposure of particles. Separate samples for each exposure time were used. Reaction products were desorbed from the support particles into basic aqueous solution, support particles were removed by centrifugation, and the resulting solution was analyzed by UV-visible transmission spectroscopy to examine the photoreaction progress. The Direct Analysis method allowed for the examination of the same sample throughout the reaction with near-UV exposure. Dye-coated sample powder was pressed into a sealable sample holder with a quartz window which allowed for both UV exp.
Author: Shawn Kendale Blue
Publisher:
ISBN:
Category : Azo dyes
Languages : en
Pages : 87
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Book Description
Studies the synthesis of two types of titanium-based catalysts, ultrasonically treated titania powder and zeolite-supported TiO2. The synthesized catalysts are characterized utilizing both SEM (Scanning Electron Microscopy) and elemental analysis. The synthesized catalysts are then kinetically characterized in the degradation of direct black 38 azo dye.
Author: Inamuddin
Publisher: Springer
ISBN: 3030106098
Category : Science
Languages : en
Pages : 343
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Book Description
This book serves the environmentalists to track the development of photocatalytic materials and technology in the present context and to explore future trends. Photocatalysis is the most influential greener technology being researched, developed and adopted for the treatment of wastewater. The technological advancements in the area of smart hybrid photocatalytic materials have gained momentum in the present era. The rational designing of photocatalytic materials with a multi-pronged approach opens a new chapter for environmental detoxification. Other important aspects relate to the transfer of this nanostructured photocatalytic technology to real backdrops. Harnessing natural solar energy for energy and environmental roles is another crucial criterion in designing photocatalysts.
Author: Yasmine Kamal Abdel-Maksoud Abdel-Salam
Publisher:
ISBN:
Category : Immobilized cell organelles
Languages : en
Pages : 344
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Book Description
Abstract: There have been rising concerns about emerging contaminants that are not efficiently removed by conventional wastewater treatment plants. TiO2 photocatalysis is one of the promising routes for sustainable wastewater treatment. Research on the use of TiO2 photocatalysis for water/wastewater treatment for the removal of persistent non-biodegradable emerging water pollutant is active worldwide. Since the mid-1970s the viability of photocatalytic degradation of organic compounds in water using TiO2 was demonstrated. More than 1,000 substances have been degraded using TiO2. Despite the extensive research on photocatalytic oxidation using TiO2, pilot and demonstration plants through the last four decades are still countable. Widespread use of photocatalytic treatment of water and wastewater require the development of an innovative photocatalytic reactor that is efficient, reliable, simple to construct, easy to maintain, has low energy consumption, low capital and operating cost and provides easy separation of catalyst after treatment ends. In an attempt to develop this desired photo-reactor, three photo-reactors were designed and constructed: the slurry water-bell photo-reactor, the immobilized water-bell photo-reactor and the immobilized tray photo-reactor. The slurry water-bell photo-reactor is based on generating a thin water film to allow for solar light penetration for photo-catalyst activation and continuous oxygenation. Recirculating the reaction solution at a high flow rate ensures good mixing and avoids dead zones in the photo-reactor. the reactor performance for degradation of phenol, as a model compound, was evaluated using commercial TiO2. Factors affecting the degradation efficiency were studied including catalyst loading, light intensity, initial pollutant concentration, oxidant addition and exposure time. Dissolved oxygen levels, temperature and pH were monitored through all the conducted tests. The performance of the slurry water-bell was compared with other photo-reactors using two benchmarks: the degradation rate constant and the reactor throughput. The reactor throughput is a function of the treated volume, treatment duration and reactor area footprint, thus it is as a versatile indicator for comparison between reactors of different types and geometries as well as selection of reactor configurations suitable for scale-up and commercialization. TiO2 was immobilized on sand grains for use as dispersed photo-catalyst in the water-bell reactor. Immobilization of TiO2 was conducted by two methods; direct immobilization using sol-gel synthesis and binding with epoxy coating. Photo-catalyst abrasion was encountered. The strong mixing conditions and flow through the recirculating pump resulted in high abrasion of the photo-catalyst off the sand surface. The tray photo-reactor was developed to avoid the high friction of the photo-catalyst particles in the recirculating pump while maintain fulfilling all the other photocatalytic process requirements of light penetration, continuous oxygen supply, and turbulent flow. The immobilized tray photocatalytic reactor uses a fixed-bed of TiO2 supported on sand grains. The reactor maintains a thin water film over the supported TiO2 catalytic bed. TiO2 was immobilized on the sand grains using 3 different immobilization approaches: 1) direct immobilization using the sol gel technique, 2) coating with TiO2/cement grout; and (3) binding with TiO2-epoxy coating. Reactor performance for the degradation of phenol as a model compound was evaluated for the three photo-catalysts. Immobilization of TiO2 on sand particles using epoxy was successful in achieving the highest phenol degradation and resistance to abrasion. The water turbidity remained unchanged indicating photo-catalyst resistance to abrasion even after multiple use of the catalytic bed. Successful operation of the tray photo-reactor in the continuous mode was also achieved. The performance of the immobilized tray photo-reactor was compared with other photo-reactors using three benchmarks: the initial degradation rate, the reactor throughput and turbidity. The immobilized tray photo-reactor is suitable for scale-up and commercialization due to five distinctive features which are: modular design; integrated storage; passive oxygenation; absence of need for UV transmitting components that are susceptible to breakage and optical losses, and simple and cheap components.
Author: Srabanti Ghosh
Publisher: John Wiley & Sons
ISBN: 3527342931
Category : Science
Languages : en
Pages : 624
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Book Description
A comprehensive and timely overview of this important and hot topic, with special emphasis placed on environmental applications and the potential for solar light harvesting. Following introductory chapters on environmental photocatalysis, water splitting, and applications in synthetic chemistry, further chapters focus on the synthesis and design of photocatalysts, solar energy conversion, and such environmental aspects as the removal of water pollutants, photocatalytic conversion of CO2. Besides metal oxide-based photocatalysts, the authors cover other relevant material classes including carbon-based nanomaterials and novel hybrid materials. Chapters on mechanistic aspects, computational modeling of photocatalysis and Challenges and perspectives of solar reactor design for industrial applications complete this unique survey of the subject. With its in-depth discussions ranging from a comprehensive understanding to the engineering of materials and applied devices, this is an invaluable resource for a range of disciplines.
Author: Anming Hu
Publisher: Springer
ISBN: 3319065785
Category : Technology & Engineering
Languages : en
Pages : 385
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Book Description
This book describes the latest progress in the application of nanotechnology for water treatment and purification. Leaders in the field present both the fundamental science and a comprehensive overview of the diverse range of tools and technologies that have been developed in this critical area. Expert chapters present the unique physicochemical and surface properties of nanoparticles and the advantages that these provide for engineering applications that ensure a supply of safe drinking water for our growing population. Application areas include generating fresh water from seawater, preventing contamination of the environment and creating effective and efficient methods for remediation of polluted waters. The chapter authors are leading world-wide experts in the field with either academic or industrial experience, ensuring that this comprehensive volume presents the state-of-the-art in the integration of nanotechnology with water treatment and purification.
Author: Vinod Kumar
Publisher: Agro Environ Media, Publication Cell of AESA, Agriculture and Environmental Science Academy,
ISBN: 8194201721
Category : Young Adult Nonfiction
Languages : en
Pages : 214
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Book Description
The compliance of this book is helpful for academicians, researchers, students, as well as other people seeking the relevant material in current trends of studies on the topic of environmental degradation.
