Adsorption Equilibrium And Kinetics Of Arsenic Onto Three Iron Oxide Based Adsorbents
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Adsorption Equilibrium And Kinetics Of Arsenic Onto Three Iron Oxide Based Adsorbents
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Author : 潘毅峰
language : en
Publisher:
Release Date : 2013
Adsorption Equilibrium And Kinetics Of Arsenic Onto Three Iron Oxide Based Adsorbents written by 潘毅峰 and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Adsorbent Treatment Technologies For Arsenic Removal
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Author : Gary L. Amy
language : en
Publisher: American Water Works Association
Release Date : 2005
Adsorbent Treatment Technologies For Arsenic Removal written by Gary L. Amy and has been published by American Water Works Association this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Nature categories.
Accompanying CD-ROM includes Excel document "Arsenic adsorbent design and costing tool".
Arsenate Removal By A Goethite Based Adsorbent
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Author : Masakazu Kanematsu
language : en
Publisher:
Release Date : 2011
Arsenate Removal By A Goethite Based Adsorbent written by Masakazu Kanematsu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Potable water supplies drawn from groundwater with high levels of arsenic are a serious public heath concern all over the world. Although adsorption technology has been recognized as one of the promising technologies to remove arsenic, few quantitative studies have been conducted to elucidate the influence of water quality on arsenic removal by adsorption technology. In this study, the extended triple layer model (ETLM), a surface complexation model consistent with spectroscopic and theoretical molecular evidence, was first systematically tested for its capability to predict arsenic adsorption on a common goethite-based granular porous adsorptive media (Bayoxide E33®) under wide range of solution conditions. Adsorption equilibrium constants of arsenate, phosphate, and carbonate were determined in single-solute systems, and these constants were used to predict competitive interactions of those ions in dual-solute systems. The ETLM successfully predicted the competitive interactions using the adsorption equilibrium constants determined in single-solute systems. The arsenate (As(V)) removal performance of a fixed-bed adsorber packed with a goethite-based adsorbent was also systematically studied at different pH, initial arsenate concentration, and empty bed contact time (ECBT) in the absence and presence of competing ions (silicate, phosphate, and vanadate). Rapid small scale column tests (RSSCTs) were extensively conducted with synthetic waters in which water quality was controlled within the environmentally relevant range. The column study quantitatively elucidates influence of water quality and operating conditions on arsenate removal by fixed-bed iron oxide adsorber. Iron oxide nanoparticles were synthesized using the inverse flame synthesis method to develop a novel adsorbent that has higher adsorption capacity than commonly used commercial adsorbents. The iron oxide nanoparticles were synthesized and fabricated using the different inverse flame conditions. The developed iron oxide nanoparticle has much higher adsorption capacity than a widely-used commercial adsorbent, Bayoxide E33. Since the inverse flame synthesis is a cost effective and suitable for large production, it can be used to synthesis adsorbent for potable water treatment or environmental remediation.
Assessing The Feasibility Of Algal Biofuel Production And Novel Adsorbents For Arsenic Removal
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Author : Sundaravadivelnathan Ponnusamy
language : en
Publisher:
Release Date : 2015
Assessing The Feasibility Of Algal Biofuel Production And Novel Adsorbents For Arsenic Removal written by Sundaravadivelnathan Ponnusamy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Algal biofuels categories.
In the second part of the research, Sol-gel derived activated alumina, supercritical carbon dioxide dried sol-gel derived activated alumina, and iron-aluminium hydrous oxides were synthesized to study the adsorption equilibrium and kinetics of arsenic removal. The main application of this study is to remove arsenic at very low concentrations from drinking water. The adsorbents were characterized using scanning electron microscope (SEM) and nitrogen adsorption for their surface and pore texture properties. The iron-aluminium hydrous oxide adsorbent was independent of the initial pH of the solution for arsenic removal. Adsorption isotherm arsenic onto sol-gel derived activated alumina is explained by the Freundlich adsorption model and the Langmuir adsorption model best explains the adsorption isotherm of arsenic onto supercritical CO2 dried sol-gel derived activated alumina and iron-aluminium hydrous oxides. Supercritical CO2 dried sol-gel derived activated alumina showed the highest adsorption capacity of 8.99 mg/g. A pseudo-second order model is used to explain adsorption reaction kinetics of arsenic onto the adsorbents and the pseudo-second order model fits the experimental data very well with a R2 value greater than 0.99.
Comparison Of Arsenic V Adsorption Equilibria And Kinetics Of Iron Zirconium Titanium And Lanthanum Based Adsorbents
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Author : Priyadharshini Swaminathan
language : en
Publisher:
Release Date : 2005
Comparison Of Arsenic V Adsorption Equilibria And Kinetics Of Iron Zirconium Titanium And Lanthanum Based Adsorbents written by Priyadharshini Swaminathan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Arsenic categories.
Emerging And Eco Friendly Approaches For Waste Management
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Author : Ram Naresh Bharagava
language : en
Publisher: Springer
Release Date : 2018-05-25
Emerging And Eco Friendly Approaches For Waste Management written by Ram Naresh Bharagava and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-25 with Science categories.
Rapid industrialization is a serious concern in the context of a healthy environment. With the growth in the number of industries, the waste generated is also growing exponentially. The various chemical processes operating in the manufacturing industry generate a large number of by-products, which are largely harmful and toxic pollutants and are generally discharged into the natural water bodies. Once the pollutants enter the environment, they are taken up by different life forms, and because of bio-magnification, they affect the entire food chain and have severe adverse effects on all life forms, including on human health. Although, various physico-chemical and biological approaches are available for the removal of toxic pollutants, unfortunately these are often ineffective and traditional clean up practices are inefficient. Biological approaches utilizing microorganisms (bacterial/fungi/algae), green plants or their enzymes to degrade or detoxify environmental pollutants such as endocrine disruptors, toxic metals, pesticides, dyes, petroleum hydrocarbons and phenolic compounds, offer eco- friendly approaches. Such eco-friendly approaches are often more effective than traditional practices, and are safe for both industry workers as well as environment. This book provides a comprehensive overview of various toxic environmental pollutants from a variety natural and anthropogenic sources, their toxicological effects on the environment, humans, animals and plants as well as their biodegradation and bioremediation using emerging and eco-friendly approaches (e.g. Anammox technology, advanced oxidation processes, membrane bioreactors, membrane processes, GMOs), microbial degradation (e.g. bacteria, fungi, algae), phytoremediation, biotechnology and nanobiotechnology. Offering fundamental and advanced information on environmental problems, challenges and bioremediation approaches used for the remediation of contaminated sites, it is a valuable resource for students, scientists and researchers engaged in microbiology, biotechnology and environmental sciences.
Recent Advances In Water And Wastewater Treatment With Emphasis In Membrane Treatment Operations
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Author : Anastasios I. Zouboulis
language : en
Publisher: MDPI
Release Date : 2019-04-02
Recent Advances In Water And Wastewater Treatment With Emphasis In Membrane Treatment Operations written by Anastasios I. Zouboulis and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-04-02 with Technology & Engineering categories.
The present Special Issue brings together recent research findings from renowned scientists in the field of water treatment and assembled contributions on advanced technologies applied to the treatment of wastewater and drinking water, with emphasis on novel membrane treatment technologies. 12 research contributions have highlighted various processes and technologies, which can achieve effective treatment and purification of wastewater and of drinking water, aiming (occasionally) for water reuse. The main topics which are analyzed are the use of novel type membranes in bioreactors, the use of modified membranes, for example using vacuum membrane distillation, the fouling of membranes, the problem of arsenic, antimony and chromium contamination in groundwaters and its removal and the use of novel technologies for more efficient ozonation.
Carbon Nanomaterial Based Adsorbents For Water Purification
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Author : Suprakas Sinha Ray
language : en
Publisher: Elsevier
Release Date : 2020-06-27
Carbon Nanomaterial Based Adsorbents For Water Purification written by Suprakas Sinha Ray and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-06-27 with Technology & Engineering categories.
The deterioration of water quality and unavailability of drinkable water are pressing challenges worldwide. The removal of toxic organic and inorganic pollutants from water is vital for a clean environment, as a response to water scarcity. Adsorption-based water technologies are among the most widely used because of their high efficiency and low cost, without relying on a complex infrastructure. In recent years, carbon nanomaterials (CNMs), such as graphene and derivatives, carbon nanotubes, carbon nanofibers, nanoporous carbon, fullerenes, graphitic carbon nitride, and nanodiamonds have been extensively exploited as adsorbents due to their extraordinary surface properties, ease of modification, large surface area, controlled structural varieties, high chemical stability, porosity, low density, ease of regeneration, and reusability. This book provides a thorough overview of the state of the art in carbon nanomaterials as they are used for adsorption applications in water purifications, as well as addressing their toxicological challenges. This volume primarily explores the fundamentals of adsorption, its mechanical aspects, synthesis and properties of CNMs, and adsorption performances of CNMs and their nanocomposites with organic and inorganic materials. Structural engineering and activation processes produce materials with enhanced adsorptive properties and separation efficiencies. Furthermore, the formation of CNMs with 2D and 3D macro-and microstructures and high porosities is a potential approach to improve adsorption performances and extend CNM use at the industrial level. The book also addresses important issues regarding these adsorbents that potentially affect future research and industrial applications of carbon-based nanoadsorbents in water security. Presents advances in multifunctional 3D superstructures of carbon nanomaterials and their composites for adsorption applications Outlines the fundamentals on synthesis and characterization techniques of carbon-based nanostructures and their composites Assesses the major toxicological challenges in using nanostructured materials as adsorbents for water purification
Ion Exchange In Environmental Processes
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Author : Arup K. SenGupta
language : en
Publisher: John Wiley & Sons
Release Date : 2017-09-18
Ion Exchange In Environmental Processes written by Arup K. SenGupta and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-09-18 with Technology & Engineering categories.
Provides a comprehensive introduction to ion exchange for beginners and in-depth coverage of the latest advances for those already in the field As environmental and energy related regulations have grown, ion exchange has assumed a dominant role in offering solutions to many concurrent problems both in the developed and the developing world. Written by an internationally acknowledged leader in ion exchange research and innovation, Ion Exchange: in Environmental Processes is both a comprehensive introduction to the science behind ion exchange and an expert assessment of the latest ion exchange technologies. Its purpose is to provide a valuable reference and learning tool for virtually anyone working in ion exchange or interested in becoming involved in that incredibly fertile field. Written for beginners as well as those already working the in the field, Dr. SenGupta provides stepwise coverage, advancing from ion exchange fundamentals to trace ion exchange through the emerging area of hybrid ion exchange nanotechnology (or polymeric/inorganic ion exchangers). Other topics covered include ion exchange kinetics, sorption and desorption of metals and ligands, solid-phase and gas-phase ion exchange, and more. Connects state-of-the-art innovations in such a way as to help researchers and process scientists get a clear picture of how ion exchange fundamentals can lead to new applications Covers the design of selective or smart ion exchangers for targeted applications—an area of increasing importance—including solid and gas phase ion exchange processes Provides in-depth discussion on intraparticle diffusion controlled kinetics for selective ion exchange Features a chapter devoted to exciting developments in the areas of hybrid ion exchange nanotechnology or polymeric/inorganic ion exchangers Written for those just entering the field of ion exchange as well as those involved in developing the “next big thing” in ion exchange systems, Ion Exchange in Environmental Processes is a valuable resource for students, process engineers, and chemists working in an array of industries, including mining, microelectronics, pharmaceuticals, energy, and wastewater treatment, to name just a few.
Green Adsorbents
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Author : George Z. Kyzas
language : en
Publisher: Bentham Science Publishers
Release Date : 2015-12-01
Green Adsorbents written by George Z. Kyzas and has been published by Bentham Science Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-12-01 with Science categories.
Adsorption technology is a promising avenue for wastewater treatment. Numerous adsorbent materials are presently synthesized. Green or environmental friendly adsorbents are derived from plants and agricultural crop sources, giving them a very low production cost when compared to synthetic polymers. This monograph explains the basic principles of green adsorption technology, their production processes and strategies to remove different categories of environmental pollutants (dyes, heavy metals and phenols/pesticides). The book explains details in terms of features such as adsorption capacity, physico-chemical kinetics and reuse potential. A summary of the economics and future prospect for green adsorption technology is also given. This text is a handy reference for environmental chemistry students, researchers and policy makers.