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Thursday, May 14, 2020 | History

3 edition of Recovery of Uranium From Natural Mine Waters by Countercurrent Ion Exchange. found in the catalog.

Recovery of Uranium From Natural Mine Waters by Countercurrent Ion Exchange.

United States. Bureau of Mines.

Recovery of Uranium From Natural Mine Waters by Countercurrent Ion Exchange.

by United States. Bureau of Mines.

  • 104 Want to read
  • 12 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesReport of investigations (United States. Bureau of Mines) -- 7471
ContributionsRoss, J., George, D.
ID Numbers
Open LibraryOL21740493M

Uranium mining is the process of extraction of uranium ore from the ground. The worldwide production of uranium in amounted to 60, tonnes. Kazakhstan, Canada, and Australia are the top three producers and together account for 70% of world uranium production. Other important uranium producing countries in excess of 1, tons per year are Niger, Russia, Namibia, Uzbekistan, China, the. The ion-exchange process was developed by the Asahi Chemical Company in Japan and uses the chemical isotope effect between two valences (U 4+ and U 6+) of uranium.

Ion Exchange Uranium Removal. Ion exchange systems (aka softening systems) have been around for decades. They are a tried and true technology, that works. Most people really aren’t aware of how Ion Exchange systems function. Unfortunately, many water treatment professionals don’t take the time to explain these systems to their customers. Ion exchange is used in nearly every part of the nuclear fuel cycle — from the purification of uranium from its ore to the final recovery of uranium and transmutation products. Ion exchange also plays a valuable role in the management of nuclear wastes generated in the fuel by: 4.

Solvents or ion exchange processing removes the uranium from the ore. The resulting uranium oxide, or yellowcake, is filtered, dried and packaged. In-situ recovery mining in the United States involves the injection of carbonated water through specially drilled wells into an . Solvent extraction or ion-exchange, Yellow-cake precipitation and drying. The run-of-mine ore, which in some instances may be 25cm or more in diameter, is crushed and then ground to the consistency of fine sand. Since most ores being processed today contain from about % to % recoverable uranium, it is necessary to process from to.


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Recovery of Uranium From Natural Mine Waters by Countercurrent Ion Exchange by United States. Bureau of Mines. Download PDF EPUB FB2

Recovery of uranium from natural mine waters by countercurrent ion exchange. [Washington, D.C.]: U.S. Dept. of Interior, Bureau of Mines, [] (OCoLC) Recovery of uranium from slightly alkaline mine water, available in the Ambrosia Lake District of New Mexico, was studied using countercurrent ion exchange columns developed by the Bureau of Mines.

Approximately 5 million gallons of mine water containing 9 to 12 ppm u3o8 was treated by ion exchange using a inch-diameter absorption column. ION EXCHANGE Solvent extraction or ion exchange is normally employed to concentrate and purify the uranium leachate and remove impurities.

Solvent extraction and ion exchange both involve the interchange of ions between the aqueous solution and either a liquid organic solution or a solid Size: KB.

Uranium carbonate industrial waste streams from a Brazilian nuclear production plant were treated by an ion exchange process using a Type II strong base anion exchange resin, IRAA with a dimethyl 2-hydroxy ethyl functional group.

The stream needed to be boiled for 6 h to lower the total carbonate concentration before it could be treated. Ion exchange resin has been used for many years in the recovery of uranium from both primary uranium producers, and from gold and copper mines as a byproduct. The current gold reefs mined at Gold Fields’ Driefontein mine contain low levels of uranium.

URANIUM RECOVERY FROM ACID WATER BY ANIONIC RESIN Mindler, A. and Termini, J. P., ''The vital role of ion exchange in uranium production,''. Of the many applications involving the use of ion exchange, the removal of contaminants in effluents ranks as one that has aroused considerable attention.

In the present study, this process was used to remove and recover uranium from acid mine waters at Caldas Uranium Mining and Extraction Plant, in the southeast of Brazil.

Studies of sorption and NaCl elution to recovery uranium as a Cited by: Uranium has been recovered via ion exchange resins since the ’s. The worldwide demand for alternative energy sources has resulted in a renewed interest in the uranium industry. Purolite has been supplying ion exchange resins for uranium recovery for many years and has accumulated much experience in the requirements of the Size: KB.

Groundwater Remediation. Uranium is a natural element found in groundwater throughout the world and regulated in some countries. Uranium is usually present as the monovalent uranyl ionic complex (U 3 O 8-) at very low levels in groundwater and thus the most cost effective treatment is to remove the uranium with a highly selective ion exchange resin and then dispose of the uranium-loaded resin.

This happens either in a uranium mill (the next step in processing ore from a conventional mine) or during in situ recovery (ISR). For that reason, the NRC regulates in situ recovery facilities (as stated above), as well as uranium mills and the disposal of liquid and solid wastes from uranium recovery operations (including mill tailings).

URANIUM MINING METHODS. Based on the current understanding of uranium deposits in the Commonwealth of Virginia, extraction of uranium ore would use open-pit mining, or underground mining, or a combination of both ().These general terms incorporate a large variety of design possibilities—there are as many methods of mining uranium as there are orebody sizes, shapes, and mineral constituents.

Uranium Recovery IX Method (Ion Exchange) 25′ x 12′ Pregnant liquor storage tanks ahead of Uranium IX and Solvent Extraction Systems.

As mentioned previously, 50% of the pregnant solution which is the clear overflow from the No. 1 Thickener is sent to the batch operated ion exchange units referred to.

Isolation of Uranium by Anionic Exchange Resins 91 radium contained in the eluate of this second column is purified in a cation-exchange resin (Dowex 50W-X8, mesh) at pH 1 [13].

Solid-phase extraction, in combination with an ion exchanging, has also been used in the separation of U from its radioactive daughters. For example,File Size: KB. TECHNICAL REPORTS SERIES35 No. 9 Uranium Extraction Technology %ffij INTERNATIONAL ATOMIC ENERGY AGENCY, VIENNA, Resin ion exchange Introduction Ion exchange chemistry and resin characteristics Processes for uranium recovery from phosphoric acid References CHAPTER 8.

PRODUCT RECOVERY Uranium Removed. 47% 54% 75% 86% 91%. Other Regenerants. The chloride ion is the most effective ion for regeneration of uranium of those commonly found in potable water.

Neutral salts, (sodium chloride by far the most common) are usually preferred because of environmental and materials of.

99* (Max) 99 99+ Mine Water Mine Water Mine Water Mine Water Parameter Dependent Column Test Column Test 16 16 16 16 1 1 1 The majority of applications of ion exchange and chemical clarification for recovery of uranium (and other radioactive materials) has taken place at uranium ore processing operations or at national laboratories.

Uranium mines and mining. See also what's at Wikipedia, your library, or elsewhere. Uranium ion exchange from low-grade acidic solutions in a fluidized system / ([Washington, Recovery of uranium from natural mine waters by countercurrent ion exchange / ([Washington, D.C.]: U.S.

Dept. of Interior, Bureau of Mines. Recovery of Uranium from Natural Mine Waters by Countercurrent Ion Exchange. U.S. Bur. Mines Report RI—l. 17 pp. Sastri, V. S., and A. Ashbrook. Reverse Osmosis Performance of Cellulose Acetate Membranes it’ the Separation of Uranium from Dilute Solutions.

Uranium Recovery (Extraction) Methods Uranium recovery involves one of the following extraction processes. In a conventional uranium mine and mill, uranium ore is extracted from the Earth, typically through deep underground shafts or shallow open pits.

The ore is transported to a mill, where it is crushed and undergoes a chemical process to. Important Uranium Isotopes U, α x U, α/γ x U, α x Relative Activity % Specific Activity pCi/µg Half Life yr Natural Abundance % Isotope, Emission Natural abundance and.

The recovery of uranium from nuclear industrial effluent has been studied using laboratory column and polymeric ion exchange resin. The industrial effluent, at pH aro contains uranium (40 mg/L), ammonium (80 g/L) and carbonate ( g/L) and cannot be discharged without previous by: Because the uranium mine wastewater was a low uranium concentration wastewater with a complex system containing Fe 3+, Zn 2+, etc, which differ from Zhang et al.

using simulated uranium contaminated wastewater and might cause competitive adsorption with uranium. The equilibrium adsorption amount of PRA decreased gradually with the dosage of Cited by: Recovery of Uranium from Carbonate Solutions of Industrial Waste Streams Uranium carbonate industrial waste streams from a Brazilian nuclear production plant were treated by an ion exchange process using a Type II strong base anion exchange resin, IRAA with a dimethyl 2-hydroxy ethyl functional group (21).

The stream needed to be.