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Optimisation of uranium–radium co-leaching from uranium ore

To improve the utilisation of uranium resources while reducing the radioactive contamination of uranium slag by 226Ra, the effects of various factors on uranium–radium co-leaching from uranium ...

Fundamentals of Radium and Uranium Removal from …

Effluent uranium levels during anion exchange with macroporous SBA resin at pH 8. Anion Exchange for Uranium Removal. If feed water contains 40 µg U/L, Waste brine …

Nitric acid leaching of radium and other significant …

Removal of hazardous radionuclides from uranium ore and/or mill tailings. Progress report, October 1, 1978-September 30, 1979 ... Effects of barium chlorine treatment of uranium ore on /sup 222/Rn emanation and /sup 226/Ra leachability from mill tailings. ... Use of phosphate compounds to extract thorium-230 and radium-226 from uranium …

Problems in the separation of radium from uranium ore …

The radium content of a representative sandstone type of uranium ore was found to be distributed uniformly according to particle size before leaching, but in sulfuric acid-leached tailings was found predominantly in the −325 mesh fraction. ... The most efficient method of radium removal is based on the application of barium chloride ...

Uranium (U) Ore | Minerals, Formation, Occurrence, Deposits

Uranium ore refers to naturally occurring rock or mineral deposits that contain a sufficient concentration of uranium, a radioactive element, to make its extraction economically viable. Uranium is a relatively rare element and is typically found in trace amounts in the Earth's crust. Uranium ore is typically mined and processed to extract …

Radium removal from elliot lake uranium-mill solids by …

DOI: 10.1016/0304-386X(83)90004-X Corpus ID: 95475670; Radium removal from elliot lake uranium-mill solids by EDTA leaching @article{Nixon1983RadiumRF, title={Radium removal from elliot lake uranium-mill solids by EDTA leaching}, author={Allen C. Nixon and D. Keller and Klaus Fritze and Alice Pidruczny and Alfio.

Removal of hazardous radionuclides from uranium ore …

The leaching of uranium ore and mill tailings to remove radium was studied. A few scouting tests were performed to obtain data on the recovery of radium, thorium, and uranium from leach liquors and on the recycle of leaching agents. ... Leached solids with radium contents approaching 10 pCi/g (98% radium removal) were obtained after six …

Treatment of phosphogypsum waste produced from phosphate ore processing

1. Introduction. Phosphogypsum (PG) is a hazardous waste associated with the phosphoric acid production using the wet process [1].PG is considered a relatively high level natural uranium series radionuclide material, which provokes a negative environmental impact and many restrictions on the use of the PG waste (only 15% of the …

Modern technologies for radium removal from water – …

The most efficient method of radium removal is based on the application of barium chloride, implemented in full technical scale in two of Polish collieries. Another …

Removal of 230Th by solvent extraction from high grade uranium ore

A dilute aqueous acidic ferric nitrate solution of a relatively low concentration of 0.02 M is found to remove up to 97% of the uranium and 93% radium from ores occurring in the Elliot Lake area ...

Separation of thorium from uranium ore | Journal of

Thorium-230 has many research applications, but there is not a commercial source of this isotope. However, since 230Th is part of the 238U decay chain, it can be separated from naturally occurring uranium. In this work, a novel procedure was developed to separate thorium from uranium ore, consisting of leaching, liquid–liquid extraction, …

Optimisation of uranium–radium co-leaching from uranium ore

To improve the utilisation of uranium resources while reducing the radioactive contamination of uranium slag by ^226Ra, the effects of various factors on uranium–radium co-leaching from uranium ore were investigated. For nitric acid agitation leaching, the optimal performance was achieved using 80 mesh ore in 4 mol L^−1 nitric …

An investigation of radium extraction from uranium mill tailings

Radium removal from uranium ores and mill tailings. U.S. Bureau of Mines, Rept. of inv. 8099 (1975) B. Havlik et al. Radium-226 liberation from uranium ore processing mill waste solids and uranium rocks into surface streams — I. Health Physics (1968) L.J. Kosarek

Process of extracting both uranium and radium from uranium …

Ferric chloride leaching at temperatures in the range 47-74/sup 0/C. is found to remove up to 97% of the uranium from ores occurring in the Elliot Lake area of Canada, but radium removal was found to be poor due to the formation …

Technologies for the treatment of effluents from …

Research on the removal of radium from uranium effluent by air-aeration hydrated manganese hydroxide adsorption..... 93 Jianguo Zhang, Chen Shaoqing, Qi Jing Effluents from a waste rock deposit of a former uranium mine in ... Processing high-grade uranium ore and managing the resulting effluents present unique problems for the operating ...

How to Remove Radium from Drinking Water for Healthy …

With a half-life of 1600 years, radium-226 is a decay product of uranium, which is also present in the Earth's crust. It enters drinking water through rocks that dissolve into aquifers. As a low-energy beta emitter, it releases radioactive particles as it decays. ... The best way to remove radium from your water is to invest in the right ...

An investigation of radium extraction from uranium mill tailings

Leaching tests were also reported with unsedimented tail- ings in EDTA and 1.5 M hydrochloric acid. These gave residues containing as little as 40 pCi g-~ radium. Ground ore was also leached with hydrochloric acid and found to give good uranium removal but incomplete radium removal.

Port Radium and the atomic highway

Wheeler River uranium project in northern Saskatchewan. Credit: Denison Mines. The Sahtú́ot'įnę played an important role in the production of Port Radium's uranium, serving as ore carriers who loaded and unloaded barges that ferried the ore across Great Bear Lake and then along the big river systems to the south.

Radium removal from elliot lake uranium-mill solids by …

Ethylenediaminetetraacetic acid (EDTA) in alkaline solution has been found to be effective in the extraction of radium-226 from uranium-mill final Pachuca solid discharge at Elliot Lake, Ontario.

-Nuclear fuel cycle Management of wastes from …

Uranium mill tailings, containing radioactive and non-radioactive materials, are the solid residues and the associated liquids which remain after uranium has been extracted from the ore. The solids consist primarily of the finely-ground bulk of the original ore, and also of a variety of chemicals precipitated from the tailings liquids.

Modern technologies for radium removal from water – …

The treatment for removal of radium from waters has been introduced at first in uranium mining and milling [21, 22]. The purification of radium waters has been the subject of numerous studies mainly due to the fact that sewage from mines and uranium ore processing plants was a very serious source of environmental contamination with …

Problems in the separation of radium from uranium ore …

After removal of the uranium from this ore by sulfuric acid leaching, the tailings were wet- classified and analyses indicated that 85% of the radium was present in the --150 mesh fraction, which contained only 20% of the total weight of the tailings solids.

Optimal methods for preparation, separation, and determination of

1. Introduction. Radium (Ra), in the form of radium chloride (RaCl 2), was first discovered by Marie and Pierre Curie in the late 19th century in the residue of pitchblende (uranium ore).The name radium is derived from the Latin "radius", which in English means "ray", because of the intense radiation is emitted.

Radium Removal from Uranium Ores and Mill Tailings.

A hydrochloric acid leaching method was used for extracting both radium and uranium from the ore to yield tailings containing less radium than tailings produced by either conventional sulfuric acid or alkaline leaching processes.

Radium in uranium mill tailings

Previous work on radium removal from mill tailings and on radioactive disequilibrium in uranium deposits is critically reviewed in relation to these mechanisms. …

Modern technologies for radium removal from water

F.G. Seeley, Problems in the separation of radium from uranium ore tailings, Hydrometallurgy, ... (US EPA) as best demonstrated available technologies for radium and uranium removal. Several ...

Processing, Extraction & Recovery of RADIUM from Uranium …

Optimal methods for preparation, separation, and …

In the first step, the radium solution is loaded onto a cation exchange resins column from dilute HCl or HNO 3 (~1–3 M), after which the column is washed with …

Processes for extracting radium from uranium mill tailings

This patent describes a process for the extraction of radium from uranium mill tailings solids including the steps of contacting the tailings with a liquid leaching agent, leaching the tailings therewith and subsequently separating the leachate liquid and the leached solids. ... Removal of hazardous radionuclides from uranium ore and/or mill ...

Use of phosphate compounds to extract thorium-230 and radium …

Tests also showed that the hexametaphosphate interferes with uranium extraction from the ore and solubilizes thorium-230 and radium-226 from neutral residues left after acid leaching. This approach was tested further, and 70-80% removal of thorium and radium from the slimes (-200 mesh) fraction of the tailings was achieved.