Download or read book Micellar Enhanced Ultrafiltration of Heavy Metals Using Lecithin written by Saman Nameghi Ahmadi and published by . This book was released on 1992 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Micellar Enhanced Ultrafiltration written by Sirshendu De and published by CRC Press. This book was released on 2012-06-04 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: A response to increasingly stringent regulation of pollution and toxicity levels in industrial waste discharge, Micellar Enhanced Ultrafiltration: Fundamentals & Applications offers the most complete book available on the benefits and use of micellar-enhanced ultrafiltration (MEUF) to achieve continuous removal of organic and inorganic pollutants. An Unparalleled Book That Addresses Both Academic and Industrial Points of View Several membrane-based techniques, such as microfiltration, ultrafiltration, nanofiltration, and reverse osmosis, are currently used in a wide range of applications throughout the textile, pulp and paper, sugar, chemical, pharmaceutical, biomedical, biotechnological, and food industries. However, although reverse osmosis is an effective means of removing contaminants, this book explains why MEUF is a better substitute, as it less expensive, less energy-intensive, and more efficient and practical for a wider range of applications. Topics covered include: Effects of pollution in water and its consequences Various treatment processes and membrane technologies Fundamentals of ultrafiltration Outline of various membrane modules and modeling approaches Principles of colloid chemistry Theories of micelle formation Stability and dynamics of micelles Phenomena of counterion binding Solubilization of organic pollutants Selection criteria for surfactants Various flux enhancement techniques Recovery of precious metals This book conveys how, with proper selection of surfactant and membrane, MEUF can be used to efficiently remove almost all metal ions (heavy metals, lanthanides, radioactive materials, etc.) with reasonably high efficiency and throughput. It also details the MEUF process for removal of inorganic (cations, anions, and their mixture) and organic pollutants. The authors explain how the economy of the overall process makes recovery and reuse of surfactants essential, and they address various influencing factors on the increase in throughput and the resulting operating problems. Elaborating on technologies involving precipitation and other methods, they also illustrate additional potential applications for MEUF technology.

Download or read book Membrane Based Separations in Metallurgy written by Lan Ying Jiang and published by Elsevier. This book was released on 2017-02-26 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membrane-Based Separation in Metallurgy: Principles and Applications begins with basic coverage of the basic principles of the topic and then explains how membrane technology helps in the development of new environmentally friendly and sustainable metallurgical processes. The book features the principles of metallurgical process and how widely the membrane-based technology has been applied in metallurgical industry, including the basic principles of membrane-based separation in terms of material science, membrane structure engineering, transport mechanisms, and module design, detailed metallurgical process flowcharts with emphasis on membrane separations, current process designs, and describes problems and provides possible solutions. In addition, the book includes specific membrane applications, molecular design of materials, fine tuning of membrane’s multi-scale structure, module selection and process design, along with a final analysis of the environmental and economic benefits achieved by using these new processes. Outlines membrane separation processes and their use in the field of metallurgy Includes case studies and examples of various processes Describes individual unit operations and sectors of extractive metallurgy in a clear and thorough presentation for students and engineers Provides a quick reference to wastewater treatment using membrane technology in the metallurgical industry Outlines the design of flowsheets, a topic that is not covered in academic studies, but is necessary for the design of working process Provides examples and analysis of the economic implications and environmental and social impacts

Download or read book The Use of Surfactant Mixtures in Removal of Heavy Metals from Aqueous Streams Using Micellar Enhanced Ultrafiltration written by Lori Lynn Walker Brant and published by . This book was released on 1991 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Textiles and Clothing written by Mohd Shabbir and published by John Wiley & Sons. This book was released on 2019-07-16 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Greater emphasis needs to be placed on research into eco-friendly processes particularly suited for the textile industry. With this goal in mind, all environmental aspects relating to the textile and clothing industry are discussed in this book. Included in the 11 informative chapters herein are topics covering the correlation between the environment and the processing and utilization of textiles and clothing. Chapter 1 discusses the direct impact that the textile industry has on the environment. The hazardous environmental consequences that synthetic dyes used to color textiles have on the environment are highlighted in Chapter 2. Greener alternatives to dyeing are discussed in Chapters 3 through 5, and eco-friendly ways of finishing textiles are discussed in Chapters 6 and 7. Finally, solutions to address the environmental hazards associated with the textile industry are presented in Chapters 8 through 11.

Download or read book Electrospinning Nanofabrication and Applications written by Bin Ding and published by William Andrew. This book was released on 2018-11-12 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrospinning: Nanofabrication and Applications presents an overview of the electrospinning technique, nanofabrication strategies and potential applications. The book begins with an introduction to the fundamentals of electrospinning, discussing fundamental principles of the electrospinning process, controlling parameters, materials and structures. Nanofabrication strategies, including coaxial electrospinning, multi-needle electrospinning, needleless electrospinning, electro-netting, near-field electrospinning, and three-dimensional macrostructure assembling are also covered. Final sections explore the applications of electrospun nanofibers in different fields and future prospects. This is a valuable reference for engineers and materials scientist working with fibrous materials and textiles, as well as researchers in the areas of nanotechnology, electrospinning, nanofibers and textiles. Explores controllable fabrication of electrospun nanomaterials and their multifunctional applications Explains the electrospinning technique as used in nanofabrication and nanofibers Outlines the applications of electrospun nanofibrous materials in tissue engineering, filtration, oil-water separation, water treatment, food technology, supercapacitors, sensors and so on

Download or read book Use of Rhamnolipid to Remove Heavy Metals from Aqueous Streams Via Micellar Enhanced Ultrafiltration written by Mohamed Abdel Monem El Zeftawy and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this research, the rhamnolipid biosurfactant was utilized in micellar-enhanced ultrafiltration (MEUF) of heavy metals from contaminated waters. The effects of different major operating conditions on the (MEUF) system performance were investigated for copper, zinc, nickel and cadmium using two membranes. The optimal conditions were successfully applied to treat six contaminated wastewaters from metal refining industries and three contaminated groundwaters using the two membranes (> 99% rejection ratio). To efficiently choose the most influential factors to the MEUF system, optimization by the response surface methodology approach was utilized and data quality was examined. Three studies were performed in order to investigate the mechanism and the interactions between the heavy metal ions and the rhamnolipid micelles in the rhamnolipid-based UF system. The first study successfully investigated the applicability of Gouy-Chapman approach for binding of heavy metal ions to rhamnolipid biosurfactant in the MEUF system and the mechanism via electrostatic attraction was suggested. The second study efficiently evaluated binding behavior of the four heavy metal ions individually and collectively onto the rhamnolipid. The order was Cu 2+> Cd 2+> Zn 2+> Ni 2+ .The third study analyzed the equilibrium data using Langmuir, Freundlich, and linear adsorption models. The Freundlich model fitted the data better and the K F values were from 1.3 to 6.1. In addition, solidification/stabilization (S/S) technology was successfully used to stabilize solid wastes contaminated with heavy metal. Furthermore, preliminary trials were performed to examine the recovery of the rhamnolipid from the retentates for possible reuse. The amounts recovered ranged from 12 ± 1% to 18 ± 1% of the rhamnolipid concentration initially present in the retentate. Similarly, preliminary trials to reuse water from the retentates were investigated. The total portions recovered ranged from about 81.0 ± 0.34% to 82.3 ± 0.46$% of the total feed water. This work may be used as preliminary investigations for further detailed pilot and/or large-scale studies to treat contaminated groundwater and industrial wastewater.

Download or read book Micellar and Polymer enhanced Ultrafiltration for Heavy Metal and Sulfate Removal from Aqueous Solutions written by Weiyun Lin and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Micellar-enhanced ultrafiltration (MEUF) and polymer-enhanced ultrafiltration (PEUF) show potential as promising techniques to remove dissolved ions from wastewater, but they remain inadequately understood. In this thesis, the MEUF removal of copper, nickel, and cobalt ions from aqueous solutions was investigated. The effect of surfactant-to-metal (S/M) ratio and pH on MEUF performance (i.e., metal rejection rate and permeate flux) were examined to obtain the preferred operational conditions. A resampling-based artificial neural network (ANN) modeling was proposed as a promising tool to predict the MEUF performance and to reveal the importance of process parameters. The model-predicted values showed good agreement with experimental data (R2 > 0.99). S/M ratio and pH had relatively greater contributions to the system performance, whereas sampling time contributed less. A high MEUF efficiency (Rejection > 99%) was achieved. To optimize the system performance and to observe the interactions among operational parameters, the statistical-based response surface methodology (RSM) was used to overcome the drawbacks of the commonly used one-factor-at-a-time method. The thesis is the first study to use an RSM method based on a Box-Behnken design to examine nickel ion removal in a MEUF system while combine with an ANN model. The generated RSM models described the relationship between each performance indicator (nickel rejection rate or permeate flux) and process variables (transmembrane pressure, feed nickel concentration, feed surfactant concentration, and membrane molecular weight cut-off (MWCO) of the membrane). Both RSM and ANN methods adequately described the performance indicators within the examined ranges of the process variables. Next, the thesis targets on sulfate ions, a dissolved anion of increasing concern but not tackled in the MEUF/PEUF field. The thesis is the first study to use MEUF and PEUF to remove sulfate ions as the target component from aqueous solutions. It is also the first to examine the adsorption mechanism of sulfate to surfactant/polymer in such systems. Both MEUF and PEUF were found technically viable to remove sulfate from aqueous streams, with the highest rejection rate (Rejection > 99%) found in dilute sulfate solutions. Further, adsorption equilibrium and kinetics studies show that Freundlich isotherm and pseudo-second-order kinetics can describe the adsorption process. This thesis adds knowledge to the existing MEUF/PEUF techniques by improving system operation, conducting system optimization, and exploring new components (i.e., sulfate ions) that can be removed. It also provides treatment information and potentially facilitates reservoir souring control and mining wastewater treatment.

Download or read book Metals Abstracts written by and published by . This book was released on 1995 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Emerging Separation and Separative Reaction Technologies for Process Waste Reduction written by Peter P. Radecki and published by . This book was released on 1999 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Findings from a workshop on process waste reduction via separation technologies and separative reactors. The book focuses primarily on adsorption and membrane separation technologies, outlines the fundamental concepts important to each of the technologies, describes state of the art processes using technologies, and highlights broad areas of need for each technology.

Download or read book Interaction of Dipalmitoyl Lecithin with Heavy Metals at the Air Water Surface written by Steven Anthony Gordziel and published by . This book was released on 1976 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Surfactant based Ultrafiltration of Heavy Metal Ions from Aqueous Streams written by Yi-Chu Huang and published by . This book was released on 1994 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Wastewaters from metal finishing facilities often contain a variety of toxic substances in dilute solution. Surfactant-based ultrafiltration (UF), which combines the high flux of UF with the high selctivity of surfactants, is applied to separate dissolved heavy metals from simulated and real wastewaters using natural surfactants such as derivatives of cholesterol and lecithins. The underlying principle is to increase the size of target metal ions by fixing them to larger surfactant macromolecules so they can be retained by a compatible membrane."--leaf iii.

Download or read book Use of Micellar enhanced Ultrafiltration and Ligand modified Micellar enhanced Ultrafiltration Processes to Remove Dissolved Metals and Organic Solutes from Aqueous Streams written by Bita Fillipi and published by . This book was released on 1997 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Use of Micellar enhanced Ultrafiltration to Remove Dissolved Organics and Multivalent Transition Metal Cations from Aqueous Streams written by Robert Ovington Dunn and published by . This book was released on 1987 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Removal of Lead Copper and Cadmium Ions from Aqueous Streams Using Lecithin Enhanced Microfiltration written by Isaac Owusu Afriyie Hodgson and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Feasibility of Polymer Enhanced Ultrafiltration peuf for Heavy Metals Retention Under Competitive Conditions written by Fahad M. Almutairi and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Micellar enhanced Ultrafiltration Using a Twin head Cationic Surfactant written by Stéphanie Gélinas and published by . This book was released on 1995 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Solubilization tests and MEUF experiments were performed with an aqueous feed solution of benzoic acid (molecular weight 122) and Rhodameen T12/90 (molecular weight 798), a twin-head, cationic tertiary amine surfactant. This surfactant has an 18 carbon hydrophobic tail and two hydrophilic polyoxyethylene heads. The equilibrium solubilization of benzoic acid by surfactant solutions was measured by semiquilibrium dialysis. The maximum solubilization was nearly one mole of benzoic acid per mole of Rhodameen." --