Download or read book REMOVAL OF ORGANIC CONTAMINANTS FROM WATER BY POLYMERIC RESINS written by Nastaran Jadbabaei and published by . This book was released on 2016 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discharge of many organic contaminants (OCs) to the environment from industries such as pharmaceuticals, pesticides, dyestuffs, and chemical intermediates is one of the major concerns to human health and the ecosystem due to their high toxicity. Existing water and wastewater treatment techniques were not specifically designed to remove OCs, and the elimination rate can vary from negligible to over 90%. Therefore, development of treatment technologies to efficiently remove OCs from water and wastewater effluents is required. Polymeric resins are an alternative for treatment since they can selectively target certain OCs as they can be custom-synthesized during polymerization by including desired functional groups to the matrix. However, additional efforts and cost are needed for the regeneration of the exhausted resins and recycling of the sorbed contaminants. Palladium based catalysts supported on polymeric resins are a promising method to overcome regeneration problems and convert contaminants to less toxic chemicals. The main goals of this research were to (1) develop predictive models for the sorption of cationic OCs by resins based on a mechanistic understanding of the sorption mechanisms of a range of cationic OCs on two cation exchange resins and (2) synthesize novel resin-based Pd catalysts to selectively remove two toxic contaminants, i.e., 4-chlorophenol and 4-nitrophenol, convert them to less toxic chemicals, and evaluate the possibility of in situ regeneration of the spent resins. The sorption study indicated that electrostatic (ion exchange) and nonelectrostatic (adsorption) interactions between nonpolar moieties of solute and sorbent have synergistic effects on sorption. It also established predictive models for estimating the sorbed concentrations of a target contaminant on a given resin at any environmentally relevant pH. Our findings point to the significant role of adsorption in the overall catalytic reactivity. The rate determining step (RDS) switched from adsorption to surface reaction with increasing concentration of the reactant. This observation was confirmed by good fitting of the reaction kinetics to the Langmuir-Hinshelwood model developed based on the respective RDS. Our results demonstrated that Pd-resin composites are advantageous to water treatment because they can avoid the conventional resin regeneration process and enable recycling of reaction products of smaller environmental impacts.

Download or read book Removal of Emerging Contaminants from Aqueous Solutions by Using Polymeric Resins written by Dan Liu and published by . This book was released on 2011 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emerging contaminants (ECs) such as estrogen hormones, perfluorinated compounds (PFCs), bisphenol A (BPA) and 1, 4-dioxane have been detected in natural water bodies at a noticeable level worldwide. The presence of ECs in the aquatic environment can pose potential threats to aquatic organisms as well as human world. Ion-exchange is a highly efficient technology for the removal of heavy metal ions and natural organic materials (NOMs) due to the nature of exchanging similar charged ions. However, this technology has not been explored for removing ECs. In this study, four categories of ECs: estrogen hormones (12), perfluorinated compounds (10), bisphenol A and 1, 4-dioxane were used as model contaminants. The adsorption of each category of ECs onto various types of polymeric resins (MN100, MN200, A530E, A532E and C115) was investigated. The removal of ECs was tested under batch and column mode. The effects of pH, resin dosage, and contact time on the removal of ECs were studied in batch mode; isotherm and kinetics models were applied to fit the experimental data. Column experiments were conducted to verify the practicability of the polymeric resins. Adsorption results have shown that both MN100 and MN200 resins could efficiently remove estrogen hormones mixture (more than 95%), and bisphenol A (more than 80%) with the initial concentration of 100 ìg/L; A532E and A530E could remove perfuorinated compounds mixture (more than 99%) with the initial concentration of 100 ìg/L. As pH increased from 9 to 11, the adsorption capacity onto polymeric resins decreased dramatically for estrogen hormones such as 17á-ethinylestradiol, estriol, 17â-estradiol, 17á-estradiol, estrone, 17á-dihydroequilin and equilin as well as bisphenol A. The adsorption of estrogen hormones and bisphenol A onto MN100 and MN200 resins reached the equilibrium within 24 hours, whereas the adsorption of perfluorinated compounds onto A532E and A530E reached the equilibrium within 8 hours. It was also observed that the adsorption of PFCs largely depends on the C-C chain length. PFCs with longer chain yielded lower adsorption efficiency onto the ion-exchange resins A532E and A530E. Adding salinity decreased the first-order rate constants for the adsorption of bisphenol A onto MN100 and MN200 resins. Fixed-bed column experiment results with estrogen hormones mixtures confirmed that the polymeric resins were good candidates in the removal of estrogen hormones. Trimegestone was the first compound detected in the effluent in the column test while 17â-estradiol, 17á-estradiol were the last. 80% of the exhausted resins (MN100 and MN200) by bisphenol A were regenerated by using pure methanol as regeneration solution. Polymeric resins were not effectively removing 1, 4-dioxane from the aqueous solution.

Download or read book Control of Organic Substances in Water and Wastewater written by and published by . This book was released on 1983 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polymer Composites From Computational to Experimental Aspects written by Sushanta K. Sethi and published by Springer Nature. This book was released on with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Removal of Organic Contaminants from Aqueous Systems written by Sher Leen Goh and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research investigates the removal of aromatic organic contaminants (nitrobenzene (NB), aniline (AN), paracetamol (PCT) and hydroquinone (HQ)) from aqueous systems. For NB, this study focusses on removal via both iron reduction and adsorption, while removal of the other three compounds is focussed purely on adsorption. The results demonstrate NB degradation using iron powder produces AN, with the rate decreasing under basic conditions, due to corrosive effects; it is established that the iron surface is essential to the degradation process. Initial NB concentration influences degradation, and pseudo-first order kinetics are observed for all systems studied. For the adsorption studies on all four species, non-functionalised Macronet MN200, acidic functionalised hyper-cross-linked polymeric resins MN500 and S957, and Granular Activated Carbon (GAC) were tested as sorbents. The results show the kinetics of adsorption, for all contaminants, follow pseudo-second order models with rates controlled by particle diffusion. For adsorption of NB, PCT and HQ, the equilibrium uptake capacities increase with decreasing acidic functionalisation of the sorbent surface; while the opposite trend was obtained for AN removal. The adsorption rate decreased as sorbent acidic capacity increased, for all sorbents, due to the inherent surface chemistry and smaller surface area of the acidic functionalised sorbents used. For equilibria study, the Freundlich equation fits the data most appropriately and adsorption of all contaminants onto the selected sorbents is a physical process. Adsorption of NB, AN, and PCT onto the studied sorbents is favourable, while it is moderately favourable for HQ. Leaching tendencies showed

Download or read book Natural Polymers Based Green Adsorbents for Water Treatment written by Susheel Kalia and published by Elsevier. This book was released on 2021-08-22 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural Polymers-Based Green Adsorbents for Water Treatment focuses on the recent development of novel polymeric adsorbents that are green and eco-friendly or biodegradable in nature. The book reviews the synthesis, properties and adsorption applications of natural and green polymer-based adsorbents. It discusses adsorption processes in biopolymer systems, remediation technologies developed to remove environmental pollutants, the usage of natural polymer-based cost-effective and green novel adsorbent materials for the removal of organic and inorganic contaminants, and the efficiency of functionalized polymers, nanosorbents, hydrogels, composites, graft copolymers in the sorption of various pollutants from the environment as well as from the industrial effluents. Researchers working on environmental remediation need a single book, where all data on natural and green adsorbents for water treatment are discussed comprehensively. Natural Polymers-Based Green Adsorbents for Water Treatment addresses this need by providing world-wide leading experts' observations and research. So, this book is a valuable reference for early-career scientist, academic researchers and graduate students in chemical engineering and material science. - Presents step-by-step review of processing and modification of natural polymers and their applications in water remediation - Analyzes data on natural and green adsorbents for water treatment, meanwhile provides world-wide experts' knowledge to pave the way for further research - Includes extensive tables, graphs, figures, bibliographies and references to enhance key concepts

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1988 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Functionalized Polymeric Materials in Agriculture and the Food Industry written by Ahmed Akelah and published by Springer Science & Business Media. This book was released on 2013-07-03 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book will be to demonstrate 1) the newly developed method of using reactive functionalized materials in agriculture to solve the economic and public health problems associated with using conventional agrochemicals; and 2) new technology aimed at achieving the greening of chemistry to meet appropriate environmental standards in both agriculture and industrial foodstuffs production. More specifically, the book will accomplish this goal by addressing 3 key issues in the field: 1) the production of reactive functionalized materials with enhanced properties that offer a major opportunity to overcome the disadvantages of using traditional materials; 2) the applications of functionalized materials in agriculture for the purpose of solving the economic and the environmental pollution problems associated with the uses of conventional agrochemicals; and 3) the contribution of polymers in solving problems associated with conventional procedures of food growth and processing, including those used in the dairy industry, sugar and fruit juices, beer and wine production, nutritive and nonnutritive food additives, and in food protection.

Download or read book Emerging Pollutant Treatment in Wastewater written by S.K. Nataraj and published by CRC Press. This book was released on 2022-03-30 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the innovations and techniques to identify and treat emerging pollutants in waste and polluted water. It begins with the classification of emerging pollutants and is followed by a review on existing detection and elimination techniques as well as the current regulations in place. Subsequent chapters cover membrane-based separation processes, polymer-based or resin-based water filters, functional materials, nanomaterials-based adsorbents, microplastics and a summary of the potential solutions in treating or removing emerging pollutants. Features Presents an overview of current and developing treatment technologies for water polluted with emerging pollutants Gives an in-depth account and analysis of advanced materials and methods for separation and treatment Reviews analytical techniques applied to detect emerging pollutants Discusses the overall effect of policies on current chemicals/plastics/APIs in the market Includes pertinent case studies and regulations This book is aimed at researchers, professionals and graduate students in environmental, civil and chemical engineering and waste and drinking water treatment.

Download or read book Ion Exchange in Environmental Processes written by Arup K. SenGupta and published by John Wiley & Sons. This book was released on 2017-08-10 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Control of Organic Substances in Water and Wastewater written by Bernard B. Berger and published by William Andrew. This book was released on 1987-01-15 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control of Organic Substances in Water and Wastewater

Download or read book Organic Synthesis Using Biocatalysis written by Animesh Goswami and published by Academic Press. This book was released on 2015-09-06 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic Synthesis Using Biocatalysis provides a concise background on the application of biocatalysis for the synthesis of organic compounds, including the important biocatalytic reactions and application of biocatalysis for the synthesis of organic compounds in pharmaceutical and non-pharmaceutical areas. The book provides recipes for carrying out various biocatalytic reactions, helping both newcomers and non-experts use these methodologies. It is written by experts in their fields, and provides both a current status and future prospects of biocatalysis in the synthesis of organic molecules. - Provides a concise background of the application of biocatalysis for the synthesis of organic compounds - Expert contributors present recipes for carrying out biocatalytic reactions, including subject worthy discussions on biocatalysis in organic synthesis, biocatalysis for selective organic transformation, enzymes as catalysis for organic synthesis, biocatalysis in Industry, including pharmaceuticals, and more - Contains detailed, separate chapters that describe the application of biocatalysis

Download or read book Inorganic Organic Composites for Water and Wastewater Treatment written by Eric Lichtfouse and published by Springer Nature. This book was released on 2021-12-03 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second volume on ''Inorganic-Organic Composites for Water and Wastewater Treatment'' reviews research findings on advanced materials and methods for purification. Considering the fact that new emerging pollutants are released into the environment and water bodies, it is necessary to develop more advanced techniques in order to treat them. The utilization of metal – organic framework in view of applications, synthesis, properties like adsorption, characterization of the electronic and geometric aspects, and hybrid systems is reiewed in this book, and the advantages/disadvantages, shortcomings including future prospects associated with metal-based nanoparticles and nanocomposites for water decontamination are discussed. In addition, the use of carbon quantum dots, supramolecular ion-exchange resins, multifunctional composite aerogels, algal biomass valorization and titania-containing composites in treatment processes are also presented.

Download or read book Removing Potential Organic Carcinogens and Precursors from Drinking Water written by Paul R. Wood and published by . This book was released on 1980 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polymeric Adsorbents written by Ahad Ghaemi and published by Elsevier. This book was released on 2023-09-08 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric Adsorbents: Characterization, Properties, Applications, and Modelling offers comprehensive information on the various types of polymeric adsorbents and uses, enabling the reader to understand, identify and prepare adsorbents with the required structure and properties for a range of key industrial applications. The book presents the various types of polymeric adsorbents and their characteristics, focuses on physicochemical properties, synthesis methods, functionalization, and composites and hybrid materials, and highlights key application areas, including gas adsorption, heavy metal removal, hazardous dye removal, and adsorption of antibiotics. Finally, the book provides detailed guidance on modeling of polymeric adsorbent behavior and molecular dynamic (MD) simulation. This is a valuable resource to researchers and advanced students across polymer science, chemistry, materials science, engineering, environmental science, and engineers, scientists, and R&D professionals with an interest in polymeric adsorbents for industrial applications. - Covers a full range of polymeric adsorbent types, as well as composites and hybrid adsorbents - Explains chemistry, characterization, functionalization and methods for improving properties - Explores a range of applications supported by detailed coverage of simulation and modeling

Download or read book Polymer Technology in Dye containing Wastewater written by Ali Khadir and published by Springer Nature. This book was released on 2022-04-25 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dyes are versatile compounds that have been successfully used in textile printing, rubber, cosmetics, plastic, pharmaceutical, and leather industries to color the products. Dye-using industries, particularly textile or printing industries are responsible for the generation of a great amount of colored wastewater that are polluting and threatening the environment. Many of these dyes are carcinogenic, mutagenic, and teratogenic, as well as harmful to human, aquatic life, and other living things and their elimination from wastewater is highly essential. Various approaches have been implemented in the efforts to mitigate the issue related to textile wastewater, such as adsorption, biological processes, advanced oxidation processes, membrane technology, etc. In this Volume 1, the application of various types of polymers in different wastewater treatment technologies are presented. The synthesis procedure of some polymers, the polymer modification, the effect of operational parameters on polymer efficiency, the interactions between polymers – dyes, etc are discussed.​

Download or read book Adsorption Processes for Water Treatment written by Samuel D. Faust and published by Elsevier. This book was released on 2013-10-22 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adsorption Processes for Water Treatment discusses the application of adsorption in water purification. The book is comprised of 10 chapters that detail the carbon and resin adsorptive processes for potable water treatment. The text first covers the elements of surface chemistry and then proceeds to discussing adsorption models. Chapter 3 tackles the kinetics of adsorption, while Chapter 4 deals with batch systems and fixed fluid beds. Next, the book talks about the physical and chemical properties of carbon. The next two chapters discuss the adsorption of organic compounds and the removal of inorganic compounds, respectively. The eighth chapter presents operational, pilot plant, and case studies. Chapter 9 discusses the biological activated carbon treatment of drinking water, and Chapter 10 covers the adsorption of macroreticular resins. The book will be of great use to both researchers and professionals involved in the research and development of water treatment process.