[PDF] The Use Of Micellar Solutions For Novel Separation Techniques eBook

Author :
Publisher :
Page : 228 pages
File Size : 47,11 MB
Release : 1993
Category :
ISBN :

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Surfactant based separation techniques based on the solubilization of organic compounds into the nonpolar interior of a micelle or electrostatic attraction of ionized metals and metal complexes to the charged surface of a micelle were studied in this work. Micellar solutions were used to recover two model volatile organic compounds emitted by the printing and painting industries (toluene and amyl acetate) and to investigate the effect of the most important variables in the surfactant enhanced carbon regeneration (SECR) process. SECR for liquid phase applications was also investigated in which the equilibrium adsorption of cetyl pyridinium chloride (CPC) and sodium dodecyl sulfate (SDS) on activated carbon were measured. Micellar-enhanced ultrafiltration (MEUF) was investigated using spiral wound membranes for the simultaneous removal of organic compounds, metals and metal complexes dissolved in water, with emphasis on pollution control applications. Investigations of MEUF to remove 99+ per cent of trichloroethylene (TCE) from contaminated groundwater using criteria such as: membrane flux, solubilization equilibrium constant, surfactant molecular weight, and Krafft temperature led to the selection of an anionic disulfonate with a molecular weight of 642 (DOWFAX 8390). These data and results from supporting experiments were used to design a system which could clean-up water in a 100,000 gallon/day operation. A four stage process was found to be an effective design and estimated cost for such an operation were found to be in the range of the cost of mature competitive technologies.

Author : Sirshendu De
Publisher : CRC Press
Page : 227 pages
File Size : 45,48 MB
Release : 2012-06-04
Category : Science
ISBN : 1439895686

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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.

Author : Pulat K. Khabibullaev
Publisher : Springer Science & Business Media
Page : 200 pages
File Size : 12,96 MB
Release : 2003-04-11
Category : Science
ISBN : 9783540438908

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This is the first monograph devoted to investigation of the most complex physical processes of soft systems, including a wide class of solutions. It blends modern theoretical understanding and experimental results, proposing new methods and models for the description of several soft systems.

Author : Milton J. Rosen
Publisher : CRC Press
Page : 232 pages
File Size : 19,9 MB
Release : 2020-11-25
Category : Science
ISBN : 1000103595

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This book is based on the proceedings of the conference "The role of surfactants in new and emerging technology". It examines the position of surfactants in the new growth areas, and describes the needs for surfactant research to facilitate advances in those areas.

Author : Philip A. Schweitzer
Publisher : McGraw-Hill Professional Publishing
Page : 1357 pages
File Size : 38,85 MB
Release : 1997
Category : Technology & Engineering
ISBN : 9780070570610

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All-in-one database of 38 proven Separation Techniques helps you design efficient, cost-effective systems the first time, every time Batch distillation problems solved! Melt crystallization techniques that save time and money! Air Stripping simplified! and much, much more. This new edition of the one and only handbook covering all major methods used to separate chemicals shares with you the knowledge and experience of 44 experts--and information that is vital to your industry and job. This solutions-oriented book explains in detail all the industrially accepted techniques for separating chemicals from one another without the use of chemical reactions. Look to this book for every method of dealing with every mixture, including liquid-liquid, liquids with dissolved solids, liquid-solid, solid-solid, gas-liquid, and gas-solid. New sections in the third edition cover design of tray columns, air stripping, melt crystallization, dust collectors, and hot gas barrier filtration. In addition, the chapters on batch distillation, steam distillation and stripping, design of packed columns, evaporation, crystallization from solutions, centrifugration, drying of solids in liquids, and gas-solid separation have been completely rewritten.

Author : John Garside
Publisher : IChemE
Page : 188 pages
File Size : 20,91 MB
Release : 1994
Category : Technology & Engineering
ISBN : 9780852953396

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Separation technology is at the heart of engineering in the chemical and process industries. This book takes the pulse of the technology, and assesses its health for future use. Recently separation technology has been under pressure to improve both the quality and diversity of products. In response, the condition of older technologies - drying, crystallization and distillation - has been improved, while newer ideas like adsorption and bioseparations have been brought rapidly into training. Understanding of the underlying phenomena of separations, argue the authors, leads to better equipment design and more applications. Newer processes depend on subtle differences in the molecular architecture of the components to be separated: chiral molecules, for example. The way in which this is reflected at a larger scale is one of the themes of the book.

Author : Rosen
Publisher : CRC Press
Page : 238 pages
File Size : 25,34 MB
Release : 1987-05-29
Category : Science
ISBN : 9780824778019

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This book is based on the proceedings of the conference "The role of surfactants in new and emerging technology". It examines the position of surfactants in the new growth areas, and describes the needs for surfactant research to facilitate advances in those areas.

Author : Sow Hsin Chen
Publisher : Springer Science & Business Media
Page : 311 pages
File Size : 42,44 MB
Release : 2012-12-06
Category : Science
ISBN : 1461389380

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During the last decade there has been a renewed interest in research on supramolecular assemblies in solutions, such as micelles and microemulsions, not only because of their extensive applications in industries dealing with catalysts, detergency, biotechnology, and enhanced oil recovery, but also due to the development of new and more powerful experimental and theoretical tools for probing the microscopic behavior of these systems. Prominent among the array of the newly available experimental techniques are photon correlation spectroscopy, small-angle neutron and X-ray scattering, and neutron spin-echo and nuclear magnetic resonance spectroscopies. On the theoretical side, the traditionally emphasized thermodynamic approach to the study of the phase behavior of self-assembled systems in solutions is gradually being replaced by statistical mechanical studies of semi-micro scopic and microscopic models of the assemblies. Since the statistical mechanical approach demands as its starting point the microscopic struc tural information of the self-assembled system, the experimental determina tion of the structures of micelles and microemulsions becomes of paramount interest. In this regard the scattering techniques mentioned above have played an important role in recent years and will continue to do so in the future. In applying the scattering techniques to the supramolecular species in solution, one cannot often regard the solution to be ideal. This is because the inter-aggregate interaction is often long-ranged since it is coulombic in nature and the interparticle correlations are thus appreciable.