Download or read book The Adsorption and Separation of Noble Metals from Base Metals by Ion exchange Techniques written by and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of investigations of the use of cation-exchange and anion-exchange techniques as analytical tools for the separation of all the noble metals from associated cations are presented.
Download or read book The Separation of Base Metals from Noble Metals by Cation Exchange written by R. Palmer and published by . This book was released on 1971 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Separation of Heavy Metals written by Anil Kumar De and published by . This book was released on 1961 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Separation of Heavy Metals written by Arup K. SenGupta and published by CRC Press. This book was released on 2001-09-26 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new book explains advanced and emerging technologies for removing heavy metals from wastestreams and contaminated sites. Separation processes of this type are critical for meeting stringent regulations of priority pollutants, especially arsenic, mercury, and lead, which the text treats in depth. After explaining the chemistry of heavy metals and their transport in various media, the work offers a comprehensive analysis of strategies for separating metals from groundwater, wastewater, contaminated soils, and industrial sludges. Both the basics and the applications of techniques such as ion-exchange, specialized sorbents, novel membranes, advanced precipitates, and electrokinetic processes are presented with a view to current use and potential for future applications such as resource reuse. Information in this volume enables engineers and other investigators to adapt and select the best means to remove and, in certain instances, recover heavy metals.
Download or read book The Adsorption Characteristics of Precious and Base Metals on Four Different Ion exchange Resins written by Ellis Raymond Els and published by . This book was released on 2000 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Analytical Chemistry of the Noble Metals written by F. E. Beamish and published by Elsevier. This book was released on 2013-10-22 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical Chemistry, Volume 24: The Analytical Chemistry of the Noble Metals describes the procedures for the separation, extraction, and analysis of noble metals. This book is composed of seven chapters, and begins with a survey on the influence of metallurgical factors on the susceptibility of platinum and gold metals to various corrosive agents. The succeeding chapter provides the methods of isolation of osmium and ruthenium from associated platinum metals and from base metals. A chapter examines the application of gravimetric methods for the separation of seven noble metals, including ruthenium, osmium, rhodium, iridium, palladium, platinum, and gold. Other chapters consider the procedures for volumetric, spectrophotometric, and spectrochemical analysis of noble metals. The concluding chapter describes the features and attributes of the equipment for noble metal analysis. This book is of value to analytical chemists and workers and researchers in metallurgy.
Download or read book The Separation by Anion Exchange of Noble Metals on Substituted Cellulose written by Christel Pohlandt and published by . This book was released on 1978 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ion Exchange and Solvent Extraction written by Arup K. SenGupta and published by CRC Press. This book was released on 2001-04-03 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text introduces a special class of polymeric ligand exchanger (PLE) with high affinities for anionic ligands. Volume 14 discusses the potential and advantages of micro- and nanofiltration membrane processes for removal of metals; details prevailing equilibrium relationships and supporting experimental data for systems where leaching and ion ex
Download or read book Ion Exchange written by Ayben Kilislioglu and published by BoD – Books on Demand. This book was released on 2015-09-09 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides broad coverage of ion exchange and its applications. Different chapters focus on the importance of ion exchange applications such as strengtening dental porcelains, gradient changes in glass refraction, and resins as effective sorbents. Each chapter includes a brief historical overview of ion exchange and its applications. The authors also give a brief overview of these applications as well as review current experimental data on the subject.
Download or read book Analysis of Noble Metals written by F.E. Beamish and published by Elsevier. This book was released on 2012-12-02 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis of Noble Metals: Overview and Selected Methods describes simple techniques with useful sensitivity, accuracy, and precision for noble metal analysis. This book is composed of seven chapters that include the methods of atomic absorption, spectrochemical, spectrophotometric, gravimetric, volumetric, and potentiometric determinations of noble metals. Each chapter discusses the concept, principles, practice, and application of the specific analytical technique. A chapter examines several separation methods for noble metals, including cation exchange, mercury amalgam, reduction, silver assay beads, solvent extraction, and dissolution. This book will be of great value to analytical chemists, instrumental engineers, and researchers.
Download or read book Iron Nickel Separation at High Concentration Solutions Using Ion Exchange written by René Alberto Silva Jimenez and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Separation of iron from nickel and other base metals is an indispensable step of leach liquor purification in hydrometallurgy. Currently, the removal of Fe3+ is carried out by precipitation increasing pH of leach liquor to the limits of iron solubility. Depending on the process conditions Fe3+ precipitates into jarosite, hematite, goethite, or magnetite. Mechanical filtration processes separate the Fe-precipitates from nickel leach solutions. The disposal of precipitate requires strict measures of waste management to reduce the potential of pollution. Iron removal through precipitation is a resource intensive process. Therefore, the pursuit of alternative processes for iron removal signify an opportunity for overall process improvements. Ion exchange is a potential alternative for Fe removal. Hydrometallurgy currently uses ion exchange resin at industrial scale for removal and purification of non-ferrous metals. However, the industry remains reluctant in applying ion exchange for iron removal. Partly due to relatively simplicity of Fe precipitation processes and the lack of environmental regulation related to waste disposal. Previous research on Fe removal by ion exchange focuses on systems at low concentrations (>0.1 M) and research related to Fe removal from electrolytes at high metal concentration is scarce. At large, most of the work is unavailable. It is protected by intellectual properties and company secrecy. Although selectivity of resins is stablished at low concentration systems, theory suggest that selectivity trends and adsorption potential change as metal concentration increases. Therefore, there is a need for investigation to confirm resins technical feasibility at electrolytes of high metal concentration. In this work, the adsorption capabilities and selectivity for Fe3+ over Ni2+ were evaluated using 30 commercial ion exchange resins of cross-linked polystyrene with divinylbenzene body with 16 different functional groups. The selected resins were classified into strong cationic exchangers (i.e., sulfonic resins), weak cationic exchangers (i.e., carboxylic resins), chelating resins (i.e., N-methyl-glucamine, amidoxime, iminodiacetic, bis-picolylamine, phosphinic, phosphoric, thiol, thiourea and isothiouronium, aminophosphonic, and combination of sulfonic and phosphonic resins), and mixed bed resin (i.e., combination of sulfonic and quaternary ammonium groups). Additionally, resin containing strong anion exchange characteristics (i.e., quaternary ammonium resins) acted as control experiments while non-functionalized resin acted as blank experiments. The potential for Fe3+ adsorption and selectivity was evaluated in bimetallic (Fe:Ni) and polymetallic (Fe:Ni:Co:Cu) systems. The bimetallic systems contained equimolar concentration of Fe3+ and Ni2+ satisfying rough averages of common concentration found in Ni-bearing sulfide and laterite ore leach liquors. The polymetallic systems contained excess of Ni2+ to represent leach liquors obtained from Ni-bearing sulfide ores. Among the resins tested, resins containing aminophosphonic acid groups (up to 94% removal), a combination of phosphonic and sulfonic (93%), iminodiacetic acid (92%), methylglucamine (91%), carboxylic acid (78%), quaternary ammonium (62%), amidoxime (67%), phosphoric acid (92%), and phosphinic acid (84%) were the best performing resins obtaining satisfactory results for the selective adsorption of Fe3+ from bimetallic and polymetallic systems. The best performing resins underwent systematic studies of single factor optimization to elucidate the parameters that most affect the efficiency of Fe3+ separations. Metal concentrations above 20 g/L and solution pH between 1.0 and 2.3 were dominant solution factors affecting the adsorption trends. Adsorption selectivity changed in time. Adsorption of Fe3+ increased with time up to a maximum of 120 min. Thereafter, the adsorption of Fe3+ was negligible. In periods under 10 min, resins obtained significant co-adsorption of base metals. After that, the co-adsorption of base metal decreased suggesting a base metal displacement by Fe3+. Conversely, temperature had little effect on the metal adsorption trends suggesting that ion exchange do perform appropriately at temperatures ranging from 20°C to 90°C. Not all best performing resins sustained Fe3+ adsorption selectivity after modification of process variables. Among the best performers, the resins sustaining Fe3+ adsorption selectivity were resins with a combination of phosphonic and sulfonic groups, resins with aminophosphonic acid, with carboxylic acid, iminodiacetic acid, phosphoric acid, quaternary ammonium, and methylglucamine. These best performing resins underwent a series of elution studies in H2SO4 and HCl solutions of 0.2, 0.5, 1, 5, and 10% v/v. Resins with a combination of phosphonic and sulfonic group showed the best elution performance amidst the resins analyzed and underwent a systematic analysis to determine the best conditions to enhance metal elution. A combination of primary and secondary elution using solutions of H2SO4 5% v/v and EDTA 5% w/w resulted in almost 100% elution of Fe3+ and Ni2+. The thermodynamic characteristics of the metal adsorption on ion exchange resins with a combination of phosphonic and sulfonic groups confirmed preference for Fe3+ over Ni2+. The calculation of heat of adsorption, entropy, and the degree of spontaneity of the adsorption reaction was difficult due to the high metal concentration in electrolyte. However, the results showed that the adsorption of Fe3+ in ion exchange resins was favourable with exothermic and exergonic characteristics and positive changes in entropy. Conversely, Ni2+ adsorption was not favourable having negative changes in entropy while the change in Gibbs energy was positive. These observations confirmed the low adsorption percentages of Ni2+ compared to that of Fe3+. None of the kinetic models employed described satisfactory the adsorption rate of Fe3+ as they failed to achieve correlations above 90%. This suggest that the adsorption rate of Fe3+ on resins with a combination of phosphonic and sulfonic groups may be governed by unknown transport phenomena not accounted on the kinetic models used. Overall, the results obtained suggest ion exchange can potentially be an alternative to iron precipitation as an iron removal process in nickel purification. However, economic studies are still required to determine the cost benefit of ion exchange resins against precipitation.
Download or read book Chromatographic Separation and Determination of Noble Metals in Matte leach Residues written by C. Pohlandt and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The practical application of various chromatographic methods to the analysis of residues obtained from the leaching of copper-nickel mattes is described. The procedure involves the separation of gold on a TBP-treated Porasil column, the separation of base metals by cation-exchange, the separation of tellurium from platinum-group metals, and the separation of the non-volatile platinum-group metals on one cellulose column.
Download or read book Hydrometallurgy in Extraction Processes written by C. K. Gupta and published by CRC Press. This book was released on 1990-08-15 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume set provides a full account of hydrometallurgy. Filled with illustrations and tables, this work covers the flow of source material from the mined or concentrate state to the finished product. It also highlights ion exchange, carbon adsorption and solvent extraction processes for solution purification and concentration. The extensive reference list-over 850-makes this set a valuable resource for extraction and process metallurgists, researchers, and practitioners.
Download or read book Rare Metal Extraction by Chemical Engineering Techniques written by W. D. Jamrack and published by Elsevier. This book was released on 2014-07-15 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rare Metal Extraction by Chemical Engineering Techniques describes the use of chemical engineering techniques in the extraction and purification of rare metals such as uranium, thorium, and zirconium as well as hafnium, titanium, beryllium, and vanadium. The various chemical extraction stages from ore to metal are discussed. Comprised of nine chapters, this book begins with an examination of ore breakdown processes including dilute acid leaching and the breakdown of concentrated acids, alkalis, and fluorides as well as chlorination. The reader is then introduced to ion-exchange purification; solvent extraction; and dryway conversion processes. Subsequent chapters focus on metal production by high-temperature reduction techniques; molten salt electrolytic processes; and iodide decomposition processes. The final chapter includes a selection of complete flowsheets for the extraction and purification rare metals from ores. This monograph will be of value to metallurgists, chemical engineers, chemists, and others who are interested in the extraction of rare metals.
Download or read book Best Practice Guide on Metals Removal From Drinking Water By Treatment written by Mustafa Ersoz and published by IWA Publishing. This book was released on 2012-05-31 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part of Metals and Related Substances in Drinking Water Set - buy all five books together to save over 30%! The EU Drinking Water Directive sets a range of standards for metals and related substances in drinking water, many of which are concerned with health protection. A number of these standards are very stringent and require compliance to be assessed at the point of use. Because of the difficulties associated with monitoring, historic practices in many countries have concentrated on the quality of water within the distribution network. As a result, the magnitude of problems with some metals and related substances in drinking water is not fully appreciated in all European countries, and the extent and nature of corrective actions differ widely. This Best Practice Guide on Metals Removal From Drinking Water By Treatment describes drinking water standards and regulations, and explains the impact of a range of water treatment processes on metal levels in drinking water. Its objectives are to provide a basis for assessing the extent of problems and to identify appropriate water treatment options. The Guide provides a reasoned guide to selection of key water treatment processes. Each chapter focuses on a specific water treatment process and has been written by experts in that particular process. Best Practice Guide on Metals Removal From Drinking Water By Treatment provides practice-based knowledge for water engineers and scientists in large and small water utilities, regulatory agencies, health agencies and local municipalities (from cities through to small rural communities). It also supports university level teaching in degree schemes that relate to water management. This Guide is one of a series produced by the International Water Association’s Specialist Group on Metals and Related Substances in Drinking Water. The series is an up-to-date compilation of a range of scientific, engineering, regulatory and operational issues concerned with the control and removal of metals from drinking water.
Download or read book The Separation of Gold from Base Metals by Cation Exchange and the Determination of Platinum by Atomic Absorption Spectroscopy written by Antony Ernest James Pitts and published by 1970.. This book was released on 1970 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extraction of Metals from Soils and Waters written by D. Max Roundhill and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extractions of Metals from Soils and Waters represents a new emphasis in the series Modern Inorganic Chemistry, namely the impact inorganic chemistry can have on the environment. Also, this is the first volume ever to introduce the reader to all aspects of heavy metal extraction. While the primary emphasis is on complexation chemistry, attention is also paid to phase transfer aspects. Particular methods of note include electrokinetics, phytoremediation, and sensors. Aimed primarily at chemists, this book will also appeal to engineers, plant biochemists, environmental health specialists, and practitioners or students of environmental law.
