Uranium version

Lanthanum(III), neodymium(III), terbium(III), thorium(IV) and uranium(VI) on Amberlite XAD-4 resin functionalized with bicine ligands. Talanta 1999, 48, 579–584. [Google Scholar] [CrossRef]Karve, M.; Rajgor, R.V. Amberlite XAD-2 impregnated organophosphinic acid extractant for separation of uranium(VI) from rare earth elements. Desalination 2008, 232, 191–197. [Google Scholar] [CrossRef]Merdivan, M.; Duz, M.Z.; Hamamci, C. Sorption behaviour of uranium(VI) with N,N-dibutyl-N’-benzoylthiourea Impregnated in Amberlite XAD-16. Talanta 2001, 55, 639–645. [Google Scholar] [CrossRef]Metilda, P.; Sanghamitra, K.; Mary Gladis, J.; Naidu, G.R.; Prasada Rao, T. Amberlite XAD-4 functionalized with succinic acid for the solid phase extractive preconcentration and separation of uranium(VI). Talanta 2005, 65, 192–200. [Google Scholar] [CrossRef] [PubMed]Metwally, E.; Saleh, A.S.; El-Naggar, H.A. Extraction and Separation of Uranium (VI) and Thorium (IV) Using Tri-n-dodecylamine impregnated resins. J. Nucl. Radiochem. Sci. 2005, 6, 119–126. [Google Scholar] [CrossRef] [Green Version]Prabhakaran, D.; Subramanian, M.S. Extraction of U(VI), Th(IV), and La(III) from acidic streams and geological samples using AXAD-16-POPDE polymer. Anal. Bioanal. Chem. 2004, 380, 578–585. [Google Scholar] [CrossRef] [PubMed]Rabie, K.A.; AbdElMoneam, Y.K.; Abdelfattah, A.I.; Demerdahs, M.; Salem, A.R. Adaptation of anion exchange process to decontaminate monazite rare earth group from its uranium content. Int. J. Res. Eng. Technol. 2014, 3, 374–382. [Google Scholar]Singh, B.N.; Maiti, B. Separation and preconcentration of U(VI) on XAD-4 modified with 8-hydroxy quinoline. Talanta 2006, 69, 393–396. [Google Scholar] [CrossRef]Ang, K.L.; Li, D.; Nikoloski, A.N. The effectiveness of ion exchange resins in separating uranium and thorium from rare earth elements in acidic aqueous sulfate media. Part 1. Anionic and cationic resins. Hydrometallurgy 2017, 174, 147–155. [Google Scholar] [CrossRef] [Green Version]Li, Z.; Chen, F.; Yuan, L.; Liu, Y.; Zhao, Y.; Chai, Z.; Shi, W. Uranium(VI) adsorption on graphene oxide nanosheets from aqueous solutions. Chem. Eng. J. 2012, 210, 539–546. [Google Scholar] [CrossRef]Li, F.; Yang, Z.; Weng, H.; Chen, G.; Lin, M.; Zhao, C. High efficient separation of U(VI) and Th(IV) from rare earth elements in strong acidic solution by selective sorption on phenanthroline diamide functionalized graphene oxide. Chem. Eng. J. 2018, 332, 340–350. [Google Scholar] [CrossRef]Song, W.; Wang, X.; Wang, Q.; Shao, D.; Wang, X. Plasma-induced grafting of polyacrylamide on graphene oxide nanosheets for simultaneous removal of radionuclides. Phys. Chem. Chem. Phys. 2015, 17, 398–406. [Google Scholar] [CrossRef]Sadeghi, S.; Sheikhzadeh, E. Solid phase extraction using silica gel modified with murexide for preconcentration of uranium (VI) ions from water samples. J. Hazard Mater. 2009, 163, 861–868. [Google Scholar] [CrossRef]Xu, H.; Li, G.; Li, J.; Chen, C.; Ren, X. Interaction of Th(IV) with graphene oxides: Batch experiments, XPS investigation, and modeling. J. Mol. Liq. 2016, 213, 58–68. [Google Scholar] [CrossRef]Cheng, W.; Wang, M.; Yang, Z.; Sun, Y.; Ding, C. The efficient enrichment of U(vi) by graphene oxide-supported chitosan. Rsc Adv. 2014, 4, 61919–61926. [Google Scholar] [CrossRef]Li, Y.; Wang,

At ingesting around 0.21 grams of uranium per year. Using a red ceramic teacup daily would give you an estimated annual radiation dose of 400 mrem to your lips and 1200 mrem to the fingers, not counting the radiation from ingesting uranium. Basically, you're not doing yourself any favors eating off the dishes and you certainly don't want to sleep with one under your pillow. Ingestion of uranium could increase the risk of tumors or cancer, particularly in the gastrointestinal tract. However, Fiesta and other dishes are a lot less radioactive than many other items produced during the same era. Which Fiesta Ware Is Radioactive? Fiesta commenced commercial sales of colored dinnerware in 1936. Most colored ceramics made prior to World War II, including Fiesta ware, contained uranium oxide. In 1943, manufacturers stopped using the ingredient because the uranium was used for weapons. Homer Laughlin, the maker of Fiesta, resumed using the red glaze in the 1950s, using depleted uranium. The use of depleted uranium oxide ceased in 1972. Fiesta ware manufactured after this date is not radioactive. Fiesta dinnerware made from 1936-1972 may be radioactive. You can buy modern Fiesta ceramic dishes in just about any color of the rainbow, though the modern colors won't match the old colors. None of the dishes contain lead or uranium. None of the modern dishes are radioactive. Sources Buckley et al. Environmental Assessment of Consumer Products Containing Radioactive Material. Nuclear Regulatory Commission. NUREG/CR-1775. 1980. Landa, E. and Councell, T. Leaching of Uranium

Rate of the eluent, e.g., 0.25 to 1.5 mL/min, in the cation exchange resin columns hinder their industrial application. This technique might be suitable in a downstream step where high purity is required. 5.2. Anion Exchange ResinThe anion exchange column is an alternative process for separating metal ions from the contaminating elements where chelating resins such as Dowex [99] and Amberlite [100,101,102,103,104,105,106] are employed. The efficiency of the separation depends on both the anion exchange resin and the type of acidic eluent [99,100,101,106]. A malonic acid eluent in methanol is employed to circulate impurities through the Dowex ion-exchange column, resulting in the adsorption of uranium with an efficiency of over 99%. However, thorium recovery was inefficient, and it remained with REE in the eluate. The Amberlite XAD-4 is another anion exchange resin that is applicable in a wide range of pH [100] and could achieve 99% recovery of uranium [107]. Compared to the XAD-4, the Amberlite XAD-2 has less surface area and larger pore diameter, and extracts uranium when impregnated with Cyanex 302; however, it also partially co-extract thorium (separation factor U/Th = 1.2 × 104) [101]. In some cases, methanol is employed to elute the collected uranium in the column [101,107].The anion exchange resin column is effective for uranium separation from REE, whereas it is inefficient for thorium separation [108]. Therefore, it can be used as the last step of REE purification. The Amberlite IRA 402 Cl resin was applied as a final purification step in a successive separation of thorium and uranium by precipitation. The low concentration uranium remained with the REE was then separated by anion chromatography, where REE recovery of 99% was achieved by the elution with NaCl. Next, 99% of uranium was recovered by water elution, Figure 8 adapted from [106]. In terms of the potential for the scale-up, in anion exchange resins, similar to cation exchange resins, the small flow rate of the feed solution, e.g., around 1 mL/min, is a significant limitation for an industrial-scale application [99,100,106]. 6. Separation by MembranesMembranes have emerged as a new method for recovering thorium and uranium from the REE. At first glance, membranes were used due to their selectivity to individually recover thorium and uranium from other metal ions in liquid solutions [109,110,111], e.g., recovery of thorium by either graphene oxide (GO) or a silica membrane [112,113]. Such a recovery occurred by the formation of a complex between the element of interest and the membrane. In general, membranes have proved to be efficient and selective in acidic conditions at a pH of 4 to 5.5 for recovery of uranium and lower than 4 to recover thorium. However, to increase the recovery of radioactive elements, it is required

321, 47–49. [Google Scholar]Goode, J.R. Thorium and rare earth recovery in Canada: The first 30 years. Can. Metall. Q. 2013, 52, 234–242. [Google Scholar] [CrossRef]Kogel, J.E.; Trivedi, N.C.; Barker, J.M.; Krukowsky, S.T. Industrial Minerals & Rocks: Commodities, Markets and Uses, 7th ed.; Society for Mining, Metallurgy, and Exploration, Inc.: Littleton, CO, USA, 2006. [Google Scholar]Dev, S.; Sachan, A.; Dehghani, F.; Ghosh, T.; Briggs, B.R.; Aggarwal, S. Mechanisms of biological recovery of rare-earth elements from industrial and electronic wastes: A review. Chem. Eng. J. 2020, 397, 124596. [Google Scholar] [CrossRef]Deshmane, V.G.; Islam, S.Z.; Bhave, R.R. Selective Recovery of Rare Earth Elements from a Wide Range of E-Waste and Process Scalability of Membrane Solvent Extraction. Environ. Sci. Technol. 2020, 54, 550–558. [Google Scholar] [CrossRef] [PubMed]Rivera, R.M.; Ulenaers, B.; Ounoughene, G.; Binnemans, K.; Van Gerven, T. Extraction of rare earths from bauxite residue (red mud) by dry digestion followed by water leaching. Miner. Eng. 2018, 119, 82–92. [Google Scholar] [CrossRef]Reid, S.; Tam, J.; Yang, M.; Azimi, G. Technospheric Mining of Rare Earth Elements from Bauxite Residue (Red Mud): Process Optimization, Kinetic Investigation, and Microwave Pretreatment. Sci. Rep. 2017, 7, 15252. [Google Scholar] [CrossRef] [Green Version]Borra, C.R.; Pontikes, Y.; Binnemans, K.; Van Gerven, T. Leaching of rare earths from bauxite residue (red mud). Miner. Eng. 2015, 76, 20–27. [Google Scholar] [CrossRef] [Green Version]Davris, P.; Balomenos, E.; Panias, D.; Paspaliaris, I. Selective leaching of rare earth elements from bauxite residue (red mud), using a functionalized hydrophobic ionic liquid. Hydrometallurgy 2016, 164, 125–135. [Google Scholar] [CrossRef]Tuan, L.Q.; Thenepalli, T.; Chilakala, R.; Vu, H.H.; Ahn, J.W.; Kim, J. Leaching Characteristics of Low Concentration Rare Earth Elements in Korean (Samcheok) CFBC Bottom Ash Samples. Sustainability 2019, 11, 2562. [Google Scholar] [CrossRef] [Green Version]Abdel-Rehim, A.M. An innovative method for processing Egyptian monazite. Hydrometallurgy 2002, 67, 9–17. [Google Scholar] [CrossRef]El-Nadi, Y.A.; Daoud, J.A.; Aly, H.F. Modified leaching and extraction of uranium from hydrous oxide cake of Egyptian monazite. Int. J. Miner. Process. 2005, 76, 101–110. [Google Scholar] [CrossRef]Lapidus, G.T.; Doyle, F.M. Selective thorium and uranium extraction from monazite: I. Single-stage oxalate leaching. Hydrometallurgy 2015, 154, 102–110. [Google Scholar] [CrossRef]Lapidus, G.T.; Doyle, F.M. Selective thorium and uranium extraction from monazite: II. Approaches to enhance the removal of radioactive contaminants. Hydrometallurgy 2015, 155, 161–167. [Google Scholar] [CrossRef]Alex, P.; Hubli, R.C.; Suri, A.K. Processing of rare earth concentrates. Rare Met. 2005, 24, 210–215. [Google Scholar]Eyal, Y.; Olander, D.R. Leaching of uranium and thorium from monazite: I. Initial leaching. Geochim. Et Cosmochim. Acta 1990, 54, 1867–1877. [Google Scholar] [CrossRef]Panda, R.; Kumari, A.; Jha, M.K.; Hait, J.; Kumar, V.; Kumar, J.R.; Lee, J.Y. Leaching of rare earth metals (REMs) from Korean monazite concentrate. J. Ind. Eng. Chem. 2014, 20, 2035–2042. [Google Scholar] [CrossRef]Shaw, K.G. A

The food was highly acidic (like spaghetti sauce). The half-life of uranium-238 is 4.5 billion years, so you can rest assured pretty much all of the original uranium oxide remains in the dishes. Uranium decays into thorium-234, which emits beta and gamma radiation. The thorium isotope has a half-life of 24.1 days. Continuing the decay scheme, the dishes would be expected to contain some protactinium-234, which emits beta and gamma radiation, and uranium-234, which emits alpha and gamma radiation. Just How Radioactive Is Fiesta Ware? There's no evidence that the people who made these dishes suffered any ill effects from exposure to the glazes, so you probably don't have a lot to worry about by just being around the dinnerware. That said, scientists at Oak Ridge National Laboratory who measured radiation from the dishes found that a standard 7" "radioactive red" plate (not its official Fiesta name) will expose you to gamma radiation if you're in the same room as the plate, beta radiation if you touch the plate, and alpha radiation if you eat acidic foods off the plate. The exact radioactivity is difficult to measure since so many factors play into your exposure, but you're looking at 3-10 mR/hr. The estimated daily human limit rate is only 2 mR/hr. In case you've wondered just how much uranium that is, researchers estimate a single red plate contains approximately 4.5 grams of uranium or 20% uranium, by weight. If you eat off the radioactive dinnerware daily, you would be looking

Market Opportunities and meet Long-term Contract Obligations: As of December 31, 2024, the Company held a total of 1,118,000 pounds of U3O8 in inventory, including 393,000 pounds of finished U3O8 and 725,000 pounds of U3O8 in stockpiled uranium ore inventories and work-in-progress. This inventory increased from last year due to Pinyon Plain, La Sal and Pandora mine ore production and additional alternate feed materials received, partially offset by our contract and spot sales during 2024. The Company expects these uranium inventories to continue increasing as we continue to mine additional ore and potentially purchase ore from third parties. The Company also held 7,043 tonnes of rutile, 11,422 tonnes of ilmenite, 1,255 tonnes of zircon, 905,000 pounds of finished vanadium ("V2O5"), 38,000 kg of finished separated neodymium praseodymium ("NdPr") and 9,000 kg of finished high purity, partially separated mixed "heavy" samarium-plus ("SM+") rare earth carbonate ("RE Carbonate") in inventory. Uranium Milestones: The Company expects to mine and stockpile ore from its Pinyon Plain, La Sal and Pandora mines totaling approximately 730,000 to 1,170,000 pounds of U3O8 contained in approximately 85,000 to 115,000 tons of ore from these mines during 2025, subject to market conditions, mining rates and other factors. The Company also expects to purchase uranium ore from third-party miners in the region, and there is the potential to receive additional Alternate Feed Materials and mine cleanup materials, expected to add a total of approximately 160,000 to 200,000 pounds of additional contained uranium to ore inventories, all of which will be processed as market conditions, Mill schedules, and contract requirements may warrant. In addition, having stockpiled mined ore available at the Mill, which can be processed into finished U3O8 product on relatively short notice, gives the Company more flexibility in securing long-term sales contracts on the most favorable terms, as market fundamentals suggest higher prices in the future may be expected. Uranium processing activities are expected to result in total finished uranium production of 200,000 to 250,000 pounds of finished U3O8 during the first half of 2025 from the Company's existing conventional ore inventories and Alternate Feed Materials, which (combined with existing inventories) is expected to be sufficient to complete expected uranium sales in 2025, while providing additional material for discretionary sales on the spot market. The Company expects to sell between 200,000 and 300,000 pounds of uranium during 2025, under the Company's existing long-term contracts with utilities. As a result of these sales, plus planned 2025 mine production, at the end of 2025, the Company expects to hold a total of 1,655,000 to 2,340,000 pounds of U3O8, including approximately 290,000 to 445,000 pounds of finished U3O8 inventory and approximately 1,365,000 to 1,895,000 pounds of U3O8 contained in stockpiled uranium ore