Uranium ion exchange from low-grade acidic solutions in a fluidized system

by G. R. Palmer

Publisher: U.S. Dept. of the Interior, Bureau of Mines in Washington, D.C

Written in English
Published: Pages: 20 Downloads: 562
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Subjects:

  • Uranium mines and mining.,
  • Solution mining.,
  • Ion exchange.

Edition Notes

Bibliography: p. 18-19.

&3-li4 November RECOVERY, REUSE, AND RECYCLE OF INDUSTRIAL WASTE by Kennath E. Noll Charles H. Haas Carol Schnidt Prasad Kodukula Department of Environmental Engineering Illinois Institute of Technology Chicago, II, 60G1G Cooperative Agreement CR EPA Project Officer William A. Caw1ey INDUSTRIAL ErjVIl!!L,\7AL RESEARCH LABOPJVTOnY . Energy and the Environment 1 Introduction 1 An Overview of This Text 2 Energy 6 Electric Power 7 Transportation Energy 8 Energy as a Commodity 9 The Environment 10 Managing Industrial Pollution 2. Biosorption of metals: general features. Usually, metallic species are not biodegradable and they are removed physically or chemically from contaminated effluents (Ahluwalia & Goyal, ; Hashim & Chu, ; Tien, ).The biosorption is a bioremediation emerging tool for wastewater treatment that has gained attention in the scientific community in the last years ().Cited by: for COM & Copper August , Vancouver, BC, Canada.

Many global mining activities release large amounts of acidic mine drainage with high levels of manganese (Mn) having potentially detrimental effects on the environment. This review provides a comprehensive assessment of the main implications and challenges of Mn(II) removal from mine drainage. We first present the sources of contamination from mineral processing, as well as the Cited by: 1. Modern flow sheets thus permit profitable recovery of highly pure nickel even from low grade ores, Example 1 Uranium is to be extracted at 40C from a feed that contains on the average ppm of uranium. that applies to each appears in the book by Marcus and Kertes, Ion Exchange and Solvent Extraction of Metal Complexes [3]. NASA Images Solar System Collection Ames Research Center. Brooklyn Museum. Full text of "Plutonium technology applied to mineral processing, solvent extraction, building Hazen research, oral history transcript / " See other formats. coal is burned for electricity, producing SOx(can be any number), causing lung problems (emphysema, asthma; it is air pollution on its own). the SOx then mixes with atmospheric H2O to produce H2SO4 [sulfuric acid, battery acid], acid rain. acid rain damages crops, lowers soil fertility [makes it too acidic], and limits fish egg viability; acid rain is also a natural occurance but is heightened.

NASA Images Solar System Collection Ames Research Center. Brooklyn Museum. Full text of "Unit Processes in Extractive Metallurgy - Hydrometallurgy". Once the copper-rich solutions are collected they can be processed by either of two processes—the cementation process or the solvent extraction/electrowinning process (SXEW). In the cementation process (which is rarely used today), the copper in the acidic solution is deposited on the surface of scrap iron in exchange for the iron. Uranium is extracted from ore via three chemically different routes, resulting in either an acidic or alkaline feed to the ion exchange circuit. At the same time, the ion exchange design can consist of either a fixed-bed, fluidized-bed or resin-in-pulp contactor. All organisms exploit the surrounding environment to sustain their metabolism, and in the process they produce waste. Prokaryotes, single-celled bacteria, have colonized every niche on the Earth's surface, absorbing local chemical compounds and excreting unused or altered compounds.

Uranium ion exchange from low-grade acidic solutions in a fluidized system by G. R. Palmer Download PDF EPUB FB2

Genre/Form: Government publications: Additional Physical Format: Online version: Palmer, G.R. (Glenn R.). Uranium ion exchange from low-grade acidic solutions in a fluidized system.

Nichols, and D. Seidel, “Design Requirements for Uranium Ion Exchange from Acidic Solutions in a Fluidized System,” U.S.

Bureau of Mines Report RIWashington, DC (). Google Scholar Cited by: 4. uranium for ion exchange sites. Common examples are vanadate, molybdate, chloride, and nitrate.

Substances fouling ion exchange resins: compounds which form inert deposits or salts inside and/or on the surface of ion exchange resins. Such deposits are not removed by File Size: KB.

Uranium mines and mining. See also what's at Wikipedia, your library, or elsewhere. Broader terms: Mines and mineral resources; Uranium industry; Used for: Uranium mining; Filed under: Uranium mines and mining Analysis of aquifer tests conducted at boreholes USW WT, UE WT#12, and USW SD-7,Yucca Mountain, Nevada / (Denver, Colo.: U.S.

Dept. of the Interior, U.S. Geological. In moderately acidic solutions (CHCl. Introduction. Uranium is an important strategic element, mostly used as enriched U for nuclear power generation and nuclear arsenal.

Depleted uranium is used as ballast (density g cm −3) in vessels and in some instances as aircraft counterweights, in armor and as penetrators in ammunition (Betti, ; Bleise et al., ).The quantity of uranium in the Earth's crust varies.

that solvent extraction (SX) and ion exchange (IX) play key roles in uranium purification from leach solutions. Although either SX or IX could be selected depending on the specific flowsheet (Tonder and Kotze ), normally when the uranium concentration in acid leach solution is high, for example, > The uranium is separated from the leach solutions by solvent-extraction or ion-exchange.

The uranium industry was the first hydrometallurgical industry to make extensive use of these two unit operations. The active agent in the solvent-extraction process is usually an organic amine salt, diluted in kerosene, that can selectively extract the. 4-in a carbonate leach system.

This can then be precipitated with an alkali, eg as sodium or magnesium diuranate. In either case the pregnant solution from the production wells is pumped to the treatment plant where the uranium is recovered in a resin ion exchange (IX) or liquid ion exchange (solvent extraction - SX) Size: KB.

A comparison of the uranium recovery from low-grade ore by bioleaching and acid leaching Uranium ores in Poland contain about – mg kg-1 U. Soils of Poland contain average amounts of U of mg kg-1 (lowland) and up to >10 mg kg-1 in the mountain soils (Sudety Mountains).File Size: KB.

Experimental measurements have been made on the batch extraction of uranium from phosphoric acid solutions using various chelating ion-exchange resins (RSPO, Diaion-CRP, Diphonix, Purolite S   A further advantage of ion exchange processes is that fluidised bed technology allows for treatment of solutions with a relatively high concentration of suspended solids and resin-in-pulp technology can treat leach slurries.

However, the extraction of uranium with strong base resins is severely affected by the presence of chloride ions in solution. Practically all the uranium resources, about 1 72 tonnes of U3O8 discovered so far are low-grade and low- to medium-tonnage variety only.

As part of the expansion program emphasis is being given to new uranium ore deposits located at Tummalapalle (Andhra Pradesh) and Gogi (Karnataka) in southern part of the country. Uranium and its pure compounds are just not readily available to the amateur scientist, element collector, or student in So what is one to do.

Make these materials oneself, of course. (At left is a quantity of home-baked yellowcake.) This is the inaugural post in what will become a short series, detailing how uranium. Bioleaching has lots of advantages compared with traditional heap leaching. In industry, bioleaching of uranium is still facing many problems such as site space, high cost of production, and limited industrial facilities.

In this paper, a continued column bioleaching system has been established for leaching a certain uranium ore which contains high by: 3. @article{osti_, title = {Recovery of uranium from lignites}, author = {Hurst, F.J.}, abstractNote = {Uranium in raw lignite is associated with the organic matter and is readily soluble in acid (and carbonate) solutions.

However, beneficiation techniques were not successful for concentrating the uranium or removing part of the reagent Cited by: 9. Counter-current HCl and H 2 SO 4 leaches were conducted on low-grade (Quirke Mine) and highgrade complex (Midwest Lake) uranium ores with various oxidants (e.g.

NaClO 3, Fe 2 (SO 4) 3, FeCl 3, Cl 2, H 2 SO 5, O 2, and O 3), in order to compare extraction efficiencies of U, Th, Ni As and Ra with batch results indicate that uranium extraction is least affected by the kind of Cited by: 9. uranium rate oxide ores concentration recovery hydrometallurgy chalcopyrite liquor containing solutions zinc ion sulfides metals oxidation cupric solvent leach liquor h2s04 concentrates minerals processing You can write a book.

Development of an Efficient Precipitation Process for Product Recovery from Leach Liquor of a Low-Grade Dolostone Hosted Uranium Ajoy Kumar Singh (India) pm. Bifunctional Ligands for High Selective Extraction and Recovery of Uranium(Vi) from Acidic Media Including Phophoric Solutions Continuous Countercurrent Ion Exchange Yvan De.

Xiangshan uranium deposit is the largest volcanic rock type uranium ore in China. Great number of low grade uranium ore (U Acidithobacullus ferrooxidans and Leptospirrillum ferriphilum, which was isolated from the uranium minerals of Xiangshan uranium deposit and domesticated with the mineral and leachate system.

The average uranium content is %, the particle sizes for column A and B Author: Jin Hui Liu, Ya Jie Liu, Zhi Hong Zheng, Xue Gang Wang, Yi Peng Zhou, Zhan Xue Sun, Wei Jun Shi.

THE CHEMISTRY OF THE EXTRACTION OF GOLDthe two techniques arise as a result of the difference in the inert supportingmatrix, which is an organic liquid such as kerosene in solvent extraction,and a solid organic polymer such as polystyrene in an ion-exchange difference can give rise to differences in the rates of anion or.

The availability of rare earth elements from primary resources has come into question in the last two decades. This has sparked various government and industry initiatives to examine potential rare earth element resources apart from virgin ore bodies.

Geothermal fluids are potentially significant sources of valuable minerals and metals, while co-recovery with geothermal energy production would Cited by: 4. This three volume set presents papers from the first collaborative global metallurgy conference focused exclusively on extractive topics, including business and economic issues.

Topics include hydrometallurgy, pyrometallurgy, sulfide flotation, and extractive metallurgy markets and economics. Sulfuric acid leaching of calcareous shale in Allouga locality has been successfully performed with efficiency %.

The produced solution has mg U L−1 and g Cl L−1. Systematic work on this type of ores is necessary to remove chloride firstly by washing with freshwater before leaching process to be suitable for U recovery on quaternary amine by: 2.

Iron exchange unit PLS Uranium ore pH adjustment AMD (pH ) Domestication pond 90% Neutralization 10% pH adjustment pH adjustment pH adjustment Air Fan Pump Pump Pump u mn l umn d mn u mn Cush to 8 30 cm 10 cm 10 cm 10 cm 10 cm 15 cm 15 cm 15 cm 15 cm cm cm 30 cm cm cm 30 cm cm cm 30 cm cm cm F: Schematic of Cited by: 3.

T he truly significant metallurgical developments of our time have begun with a revolutionary advancement of the art, followed by decades of evolutionary improvements by academicians, development laboratories, manufacturers, and mineral industry operators.

Revolutionary advances usually require time to reach maturity and to gain acceptance. While they can potentially transform the.

Solvent degradation—Rössing Uranium Mine by B.M. Munyungano* Synopsis Rössing Uranium Mine operates a recovery circuit with continuous ion exchange followed by solvent extraction. Serious organic degradation problems were encountered during /6, and in the solvent extraction plant.

The preferential loss of the. Of the uranium sources being worked at the end of74 percent were underground mines, 16 percent were open pit mines, and the remaining 10 percent consisted of other sources (e.g., low-grade stock piles, heap leach, mine water, solution mining).1 In terms of total ore production, however, underground mines provided 48 percent.

The book provides insights on minerals biotechnology, explores plant design and operation, discusses the challenges of plant start-ups, and offers practical solutions for reducing energy consumption in all aspects of unit operations. It also provide insights on acid rock drainage, waste water and resource recovery, process development and.

Uranium is more liberal with valence states than most of its neighbors. The oxides are not soluble in water, so we do not know if they would give basic or acidic hydroxides, but basic would be more probable, so that uranium would definitely behave as a metal. Description; Chapters; Supplementary; This book presents the latest achievements of separation science and technology.

It highlights the application of separation with regard to problems of current interest, such as the protection of the environment and the development of emerging technology, including chemical engineering, biotechnology, renewable energy sources and recycling of materials.Namibia has extensive deposits of low-grade uranium and is regarded as a region of global importance for this source of energy.

Namibia also has a long history of uranium mining, dating back towhen Rio Tinto's Rössing uranium mine opened. The Namibian Government’s position on .In other words the hydroxide ion is so greatly preferred by the resin that ion exchange in strong alkali solutions is totally unfavourable, and the exchanger remains in the free base form (cf.

weak acid resins), RCH2NH(CH3),+ + OH- + B-aq ion exchange 7. RCH2NH(CH3)2+ B-+ OH- ()5/5(6).