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Weathered Crust Elution Deposited Rare Earth Ores

Weathered Crust Elution deposited Rare Earth Ores PDF Book Details:
Author: Ruan Chi
Publisher: Nova Science Pub Incorporated
ISBN:
Size: 66.22 MB
Format: PDF, ePub, Mobi
Category : Science
Languages : en
Pages : 288
View: 1024

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Weathered Crust Elution Deposited Rare Earth Ores PDF

by Ruan Chi, Weathered Crust Elution Deposited Rare Earth Ores Books available in PDF, EPUB, Mobi Format. Download Weathered Crust Elution Deposited Rare Earth Ores books, Weathered crust elution - deposited rare earth ore (original name is the ion-adsorbed rare earth ore) was first discovered as a novel exogenous ore in Jiangxi province of China in 1969. There are many advantages for the ore which has a widespread distribution, rich reserves, low radioactivity, complete RE partitioning and is rich in middle and heavy rare earth. Especially, the middle and heavy rare earth which occupies 80% over the world is the unique mineral resource in China, distributing only in southern China such as Jiangxi, Fujian, Hunan, Guangdong and Guangxi et al.


Leach Of The Weathering Crust Elution Deposited Rare Earth Ore For Low Environmental Pollution With A Combination Of Nh4 2so4 And Edta

Leach of the Weathering Crust Elution deposited Rare Earth Ore for Low Environmental Pollution with a Combination of  NH4 2SO4 and EDTA  PDF Book Details:
Author:
Publisher:
ISBN:
Size: 46.58 MB
Format: PDF, ePub, Mobi
Category :
Languages : en
Pages :
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Leach Of The Weathering Crust Elution Deposited Rare Earth Ore For Low Environmental Pollution With A Combination Of Nh4 2so4 And Edta PDF

by , Leach Of The Weathering Crust Elution Deposited Rare Earth Ore For Low Environmental Pollution With A Combination Of Nh4 2so4 And Edta Books available in PDF, EPUB, Mobi Format. Download Leach Of The Weathering Crust Elution Deposited Rare Earth Ore For Low Environmental Pollution With A Combination Of Nh4 2so4 And Edta books, Abstract: High concentration of ammonium sulfate, a typical leaching agent, was often used in the mining process of the weathering crust elution-deposited rare earth ore. After mining, a lot of ammonia nitrogen and labile heavy metal fractions were residual in tailings, which may result in a huge potential risk to the environment. In this study, in order to achieve the maximum extraction of rare earth elements and reduce the labile heavy metal, extraction effect and fraction changes of lanthanum (La) and lead (Pb) in the weathering crust elution-deposited rare earth ore were studied by using a compound agent of (NH4 )2 SO4 -EDTA. The extraction efficiency of La was more than 90% by using 0.2% (NH4 )2 SO4 -0.005M EDTA, which was almost same with that by using 2.0% (NH4 )2 SO4 solution. In contrast, the extraction efficiency of Pb was 62.3% when use 0.2% (NH4 )2 SO4 -0.005M EDTA, which is much higher than that (16.16%) achieved by using 2.0% (NH4 )2 SO4 solution. The released Pb fractions were mainly acid extractable and reducible fractions, and the content of reducible fraction being leached accounted for 70.45% of the total reducible fraction. Therefore, the use of 0.2% (NH4 )2 SO4 -0.005M EDTA can not only reduce the amount of (NH4 )2 SO4, but also decrease the labile heavy metal residues in soil, which provides a new way for efficient La extraction with effective preventing and controlling environmental pollution in the process of mining the weathering crust elution-deposited rare earth ore. Graphical abstract: Highlights: We developed an improved compound agent of (NH4 )2 SO4 and EDTA. The extraction efficiency of La reached up to 93.5%, which is consistent with 2.0% (NH4 )2 SO4 solution. The extraction efficiency of Pb was 62.3%, which was much higher than that (16.16%) achieve by using 2.0% (NH4 )2 SO4 solution.


Clay Nanoparticles

Clay Nanoparticles PDF Book Details:
Author: Giuseppe Cavallaro
Publisher: Micro and Nano Technologies
ISBN: 0128167831
Size: 44.65 MB
Format: PDF, ePub
Category : Technology & Engineering
Languages : en
Pages : 364
View: 7520

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Clay Nanoparticles PDF

by Giuseppe Cavallaro, Clay Nanoparticles Books available in PDF, EPUB, Mobi Format. Download Clay Nanoparticles books, Clay Nanoparticles: Properties and Applications sets out the major properties of clay nanoparticles and their technological applications. The first part of the book focuses on the characterization of nanoclays, including layered, fibrous and tubular clay minerals. The second part illustrates the current and potential applications of nanoclays within material science and biotechnology. These include the development of geopolymers and bionanocomposites based on sustainable polymers filled with ecocompatible nanoclay. The potential use of nanoclays as flame retardants is also discussed, along with the correlation between the properties and potential applications of several nanoclay types. In particular, the applications explored include nanoclays as drug delivery systems and for environmental protection. The book provides a complete and multidisciplinary exploration of nanoclays, highlighting a range of perspectives within current nanotechnology research. Assesses the advantages of using nanoclays instead of conventional clay materials in product design Describes the major characterization techniques - both experimental and computational - for nanoclays Explores new fabrication techniques based on pristine and modified clay nanoparticles that are being used both in materials science and biotechnology


Hydrometallurgy Of Rare Earths

Hydrometallurgy of Rare Earths PDF Book Details:
Author: Dezhi Qi
Publisher: Elsevier
ISBN: 0128139218
Size: 16.54 MB
Format: PDF
Category : Technology & Engineering
Languages : en
Pages : 804
View: 160

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Hydrometallurgy Of Rare Earths PDF

by Dezhi Qi, Hydrometallurgy Of Rare Earths Books available in PDF, EPUB, Mobi Format. Download Hydrometallurgy Of Rare Earths books, Hydrometallurgy of Rare Earths: Extraction and Separation provides the basic knowledge for rare earth extraction and separation, including flow sheet selection criteria and related technology. The book includes the latest research findings on all rare earth separation processes, methods of controlling operation costs, and strategies that help lower wastewater and waste solid discharge. It discusses many real process parameters and actual situations in rare earth separation plants, also examining the basic principles, technologies, process parameters and advances and achievements in the area of rare earth extraction and separation. In addition, the book covers extraction separation theory as developed by Professor Guanxian Xu and Professor Chunhua Yan and the creative use of a computational simulation program to replace the bench scale and pilot plant tests and directly design rare earth extraction separation processes. Outlines the theory of solvent extraction and separation of rare earths (REs) Provides the necessary tools for a REs separation plant design Includes a unique simulation program for the calculation of all process parameters Includes Chinese nomenclature that is useful for identifying the various processes, also comparing it to the global literature


Extractive Metallurgy Of Rare Earths

Extractive Metallurgy of Rare Earths PDF Book Details:
Author: Nagaiyar Krishnamurthy
Publisher: CRC Press
ISBN: 1466576383
Size: 18.92 MB
Format: PDF, Kindle
Category : Technology & Engineering
Languages : en
Pages : 839
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Extractive Metallurgy Of Rare Earths PDF

by Nagaiyar Krishnamurthy, Extractive Metallurgy Of Rare Earths Books available in PDF, EPUB, Mobi Format. Download Extractive Metallurgy Of Rare Earths books, New Edition Now Covers Recycling, Environmental Issues, and Analytical Determination Employing four decades of experience in the rare metal and rare earths industry, the authors of Extractive Metallurgy of Rare Earths, Second Edition present the entire subject of rare earth elements with depth and accuracy. This second edition updates the most important developments from the past 10 years. It emphasizes advances made in rare-earth materials processing (converting a rare-earth metal, alloy, or compound to a device-ready material), breakthroughs in the area of rare-earth separation, and now includes a chapter on the recycling of rare earth elements from magnets, batteries, and phosphors among others, covering both manufacturing scrap or materials in end of life devices. Essential to Your Collection This second edition presents comprehensive, detailed, and up-to-date coverage that includes: All aspects of rare earth extractive metallurgy A status of rare earth extraction from various world resources Flow sheets that can be used for rare earths separation, metal reduction, alloy making, refining and end product materials preparation Techniques of various rare earths recycling options An outline of environmental issues in rare earths mining and processing Methods of rare earths determination and analyses of components and impurities in rare earth materials Information extensively linked to primary literature with a complete listing of references A narration of the changing scenario of world rare earth resources and possibility of their exploitation An indispensable resource, Extractive Metallurgy of Rare Earths, Second Edition explains the many aspects of rare earth extractive metallurgy clearly and systematically. The text reveals process implementation possibilities and research opportunities, and considers potential solutions to the challenges impacting this rapidly changing industry.


Rare Earths Industry

Rare Earths Industry PDF Book Details:
Author: Ismar Borges De Lima
Publisher: Elsevier
ISBN: 0128025689
Size: 80.66 MB
Format: PDF, Kindle
Category : Science
Languages : en
Pages : 434
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Rare Earths Industry PDF

by Ismar Borges De Lima, Rare Earths Industry Books available in PDF, EPUB, Mobi Format. Download Rare Earths Industry books, Rare Earths elements are composed of 15 chemical elements in the periodic table. Scandium and yttrium have similar properties, with mineral assemblages, and are therefore referred alike in the literature. Although abundant in the planet surface, the Rare Earths are not found in concentrated forms, thus making them economically valued as they are so challenging to obtain. Rare Earths Industry: Technological, Economic and Environmental Implications provides an interdisciplinary orientation to the topic of Rare Earths with a focus on technical, scientific, academic, economic, and environmental issues. Part I of book deals with the Rare Earths Reserves and Mining, Part II focuses on Rare Earths Processes and High-Tech Product Development, and Part III deals with Rare Earths Recycling Opportunities and Challenges. The chapters provide updated information and priceless analysis of the theme, and they seek to present the latest techniques, approaches, processes and technologies that can reduce the costs of compliance with environmental concerns in a way it is possible to anticipate and mitigate emerging problems. Discusses the influence of policy on Rare Earth Elements to help raise interest in developing strategies for management resource development and exploitation Global contributions will address solutions in countries that are high RE producers, including China, Brazil, Australia, and South China End of chapter critical summaries outline the technological, economic and environmental implications of rare earths reserves, exploration and market Provides a concise, but meaningful, geopolitical analysis of the current worldwide scenario and importance of rare earths exploration for governments, corporate groups, and local stakeholders


Handbook On The Physics And Chemistry Of Rare Earths

Handbook on the Physics and Chemistry of Rare Earths PDF Book Details:
Author:
Publisher: Elsevier
ISBN: 0444634843
Size: 28.30 MB
Format: PDF, ePub
Category : Science
Languages : en
Pages : 420
View: 4699

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Handbook On The Physics And Chemistry Of Rare Earths PDF

by , Handbook On The Physics And Chemistry Of Rare Earths Books available in PDF, EPUB, Mobi Format. Download Handbook On The Physics And Chemistry Of Rare Earths books, Handbook on the Physics and Chemistry of Rare Earths is a continuous series of books covering all aspects of rare earth science, including chemistry, life sciences, materials science, and physics. The main emphasis of the handbook is on rare earth elements [Sc, Y and the lanthanides (La through Lu)], but whenever relevant, information is also included on the closely related actinide elements. The individual chapters are comprehensive, broad, up-to-date, critical reviews written by highly experienced invited experts. The series, which was started in 1978 by Professor Karl A. Gschneidner Jr., combines and integrates both the fundamentals and applications of these elements, now publishing two volumes a year. Individual chapters are comprehensive, broad, critical reviews on the topic of rare earths Contributions are written by highly experienced, invited experts Up-to-date overviews of developments in the field Includes update on many of the closely related actinide elements


Dynamical Symmetry Of The Kepler Coulomb Problem In Classical And Quantum Mechanics

Dynamical Symmetry of the Kepler Coulomb Problem in Classical and Quantum Mechanics PDF Book Details:
Author: Tamar T. Khachidze
Publisher: Nova Science Pub Incorporated
ISBN: 9781604564990
Size: 35.10 MB
Format: PDF, Kindle
Category : Science
Languages : en
Pages : 150
View: 1469

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Dynamical Symmetry Of The Kepler Coulomb Problem In Classical And Quantum Mechanics PDF

by Tamar T. Khachidze, Dynamical Symmetry Of The Kepler Coulomb Problem In Classical And Quantum Mechanics Books available in PDF, EPUB, Mobi Format. Download Dynamical Symmetry Of The Kepler Coulomb Problem In Classical And Quantum Mechanics books, The purpose of this new and important book is to develop a systematic theory for the hidden symmetry generators, which are simultaneously the odd generators of superalgebra in relativistic quantum mechanics (Dirac's equation). It is devoted to the description of so-called hidden symmetry of the Kepler problem in classical and quantum mechanics (non-relativistic and relativistic). Moreover, the purpose is to elucidate the role of this kind of symmetries in the reduction of physical problems, to show algebraic possibilities of derivation of spectra. Since weathered crust elution -- deposited rare earth ore was discovered, the basic researches on the metallogeny mechanism, the prospecting rule and the production have been studied continuously for more than thirty years. The three leaching technologies of bath leaching with sodium chloride, bath leaching with ammonium sulphate and in-situ leaching with ammonium sulphate are developed sequentially. All of these contribute to the industry of the weathered crust elution-deposited rare earth ore. However, there was no systematic work on the weathered crust elution -- deposited rare earth ore in the past due to many reasons such as the confidentiality, which was not beneficial for the development of this ore. The metallogeny theory and mining technologies of the weathered crust elution -- deposited rare earth ore are introduced systematically in this book for readers.


Computer And Computing Technologies In Agriculture Vii

Computer and Computing Technologies in Agriculture VII PDF Book Details:
Author: Daoliang Li
Publisher: Springer
ISBN: 3642543448
Size: 41.58 MB
Format: PDF, Kindle
Category : Computers
Languages : en
Pages : 520
View: 3981

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Computer And Computing Technologies In Agriculture Vii PDF

by Daoliang Li, Computer And Computing Technologies In Agriculture Vii Books available in PDF, EPUB, Mobi Format. Download Computer And Computing Technologies In Agriculture Vii books, The two-volume set IFIP AICT 419 and 420 constitutes the refereed post-conference proceedings of the 7th IFIP TC 5, WG 5.14 International Conference on Computer and Computing Technologies in Agriculture, CCTA 2013, held in Beijing, China, in September 2013. The 115 revised papers presented were carefully selected from numerous submissions. They cover a wide range of interesting theories and applications of information technology in agriculture, including Internet of things and cloud computing; simulation models and decision-support systems for agricultural production; smart sensor, monitoring, and control technology; traceability and e-commerce technology; computer vision, computer graphics, and virtual reality; the application of information and communication technology in agriculture; and universal information service technology and service systems development in rural areas.


Book Review Index

Book Review Index PDF Book Details:
Author:
Publisher:
ISBN:
Size: 10.84 MB
Format: PDF, ePub, Mobi
Category : Books
Languages : en
Pages :
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Book Review Index PDF

by , Book Review Index Books available in PDF, EPUB, Mobi Format. Download Book Review Index books,