Extractive separation of Th(IV), U(VI), Ti(IV), La(III) and Fe(III) from Zarigan ore

Nasab, M. Eskandari; Milani, S.; Sam, Abbas

doi:10.1007/s10967-011-1008-z

Cited by 15 publications

(2 citation statements)

References 11 publications

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“…The Cyanex is another type of acid organophosphorus extractant that is widely employed for thorium and uranium separation from REE [69,[81][82][83]. The mechanism of metals extraction by Cyanex is the cation exchange [69], where the strength of the acid determines the performance of the Cyanex extractants.…”

Section: Solvent Extraction With Phosphorous Extractantsmentioning

confidence: 99%

“…The commonly used Cyanex extractants are the Cyanex 272 (di-2,4,4-trimethyl phosphonic acid), Cyanex 301 (bis-2,4,4-trimethylprntyl phosphonic acid) [84], and Cyanex 302 [69]. The Cyanex 272 shows higher efficiency compared to the Cyanex 302 for separating thorium from lanthanides due to the higher strength of the latter acid [83]. In addition, applying a mixture of extractants, e.g., a mixture of HEH and EHP in kerosene, is a promising approach to increase the efficiency of the solvent extraction for separating thorium from REE (Table 6).…”

Section: Solvent Extraction With Phosphorous Extractantsmentioning

confidence: 99%

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Separation of Radioactive Elements from Rare Earth Element-Bearing Minerals

García

Latifi

Amini

et al. 2020

Metals

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Rare earth elements (REE), originally found in various low-grade deposits in the form of different minerals, are associated with gangues that have similar physicochemical properties. However, the production of REE is attractive due to their numerous applications in advanced materials and new technologies. The presence of the radioactive elements, thorium and uranium, in the REE deposits, is a production challenge. Their separation is crucial to gaining a product with minimum radioactivity in the downstream processes, and to mitigate the environmental and safety issues. In the present study, different techniques for separation of the radioactive elements from REE are reviewed, including leaching, precipitation, solvent extraction, and ion chromatography. In addition, the waste management of the separated radioactive elements is discussed with a particular conclusion that such a waste stream can be employed as a valuable co-product.

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