Kinetics of uranium carbonate leaching process from carbonaceous shale, southwestern Sinai, Egypt

Wahab, Saad Abdel; Rezik, A.; Khoziem, Hanaa A. Abu; Khalid, E.; Abdellah, W. M.

doi:10.1007/s41207-019-0106-0

Cited by 11 publications

(6 citation statements)

References 10 publications

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“…The acidic and alkaline leaching methods are most common used for U leaching from its ores; however, acid leaching is extra broadly used than the alkaline. The choice of the suitable leaching method and agent type is mainly depending on the ore's chemical and mineralogical composition of ore materials as they are considered as pre-requisites for the realization of successful processing and recovery of the present metal values [12][13][14][15][16][17][18]. In this context, the first trial to recover about 99% of U content from G. El Sela granitic rocks was done by Abu Khoziem [19] through applying 300 g/L H2SO4 for 4 h at 100 º C and S/L ratio of 1/2.…”

Section: Introductionmentioning

confidence: 99%

Insight on uranium recovery valorization from El Sela highly altered granitic rocks, South Eastern Desert, Egypt

Abu Khoziem,

Zaki,

Abdellah

et al. 2023

Egypt. J. Chem.

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One of the more difficult problems affecting leaching process is the presence of clayey materials. The latter act as natural adsorbent for dissolved uranium (U) from one hand, and a selling surface which complicate solid liquid separation from the other hand. The materials that are clay-like were created as a result of substantial weathering of the pre-formed granitic rocks. This is the case in the kaolinitized two mica mineralized granite of Gabal (G.) El Sela area, which is situated in the extreme southeastern part of Egypt. The present work is oriented towards solving the problems of low uranium leaching efficiency as well as poor filtration process. Agitation leaching process using H2SO4 was first applied upon mineralized raw sample assaying 850 ppm of U. Different leaching parameters include acid concentration, solid/liquid ratio, agitation time and temperature as well as the concentration of added NaCl were studied. About 89% of U content was dissolved using 15% H2SO4 at 90ºC for 2h in the presence of 0.25M of NaCl the purpose was to facilitate the permeability of the pulp. The experimental data were interpreted with a shrinking core model with diffusion control through a porous product layer for El Sela ore material. The leaching process follows the kinetic model: 1-3 (1-X) 2/3 + 2 (1-X) = k1t with an apparent activation energy of 19.49 kJ/mole.

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Section: Introductionmentioning

confidence: 99%

Insight on uranium recovery valorization from El Sela highly altered granitic rocks, South Eastern Desert, Egypt

Abu Khoziem,

Zaki,

Abdellah

et al. 2023

Egypt. J. Chem.

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“…However, the separation of uranium from thorium and rare earth elements is difficult and limited because of the similar properties of their compounds. Particularly, uranium as one of the radionuclides and the main element for energy production exhibits dangerous problems to the environment through activities including mining, milling, and spent nuclear reprocessing [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Hexagonal Cylinder Mesoporous Sorbent for Separation of Uranium Ions from Nitrate Media

Elshehy

2021

Chem Eng & Technol

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The synthesis of mesoporous silica monoliths-based phosphonate groups (SiO 2 -DPTS) through immobilization of diethylphosphatoethyltriethoxysilane using the post-grafting approach to be applied as a sensitive sorbent for selective separation of U(IV) ions from aqueous solutions is described. The designed SiO 2 -DPTS sorbent was characterized by Fourier transform infrared, scanning electron and highresolution transmission electron microscopy, scanning transmission electron microscopy/energy-dispersive X-ray spectroscopy, N 2 adsorption-desorption, and elemental analysis. The adsorption process was studied under different experimental conditions of pH, concentration, and time. The mechanism of interaction of SiO 2 -DPTS with U(VI) ions was explored and supported by density functional theory (DFT) calculations. This synthesized sorbent allows highly efficient extraction of U(IV) ions from uranyl leach liquor.

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“…Huge quantities of uranium exist in seawaters (3 µg/L) [4][5][6]. A few of it is obtained as by-product from other industries, such as the gold and phosphate production [7][8][9][10]. The necessity to produce large quantities of uranium from real mines has resulted in the headway of the extraction techniques [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…A few of it is obtained as by-product from other industries, such as the gold and phosphate production [7][8][9][10]. The necessity to produce large quantities of uranium from real mines has resulted in the headway of the extraction techniques [7][8][9][10][11]. The various techniques used for extraction and separation of uranium include precipitation, solvent extraction and adsorption attracted much attention in the last decades [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…The necessity to produce large quantities of uranium from real mines has resulted in the headway of the extraction techniques [7][8][9][10][11]. The various techniques used for extraction and separation of uranium include precipitation, solvent extraction and adsorption attracted much attention in the last decades [7][8][9][10][11][12][13][14]. Therefore, adsorption was found to be a potential method for removal and extraction of metal ion from effluents because of its low operational and maintenance costs [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Mesoporous NaZrP Cation-Exchanger for U(VI) Ions Separation from Uranyl Leach Liquors

Alhindawy

Elshehy

El‐Khouly

et al. 2019

Colloids and Interfaces

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As the demand for uranium production-based energy worldwide has been increasing in the last decades to maintain nuclear growth for electricity production, there are great efforts towards developing an easy and inexpensive method for uranium extraction and separation from its ores. For this purpose, mesoporous inorganic cation exchangers provide an efficient separation technology that can help streamline production and lower overall cost. This study describes the development of nano-structured mesoporous sodium zirconium phosphate (NaZrP-CEX) for separation and extraction of uranyl ions from real samples. The fabricated NaZrP-CEX was well characterized by various techniques such as X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), Scanning Electron Microscope (SEM), N2 adsorption/desorption, Dynamic light scattering (DLS) and zeta potential). The kinetics/thermodynamic behaviors of uranyl ion adsorption into NaZrP-CEX from an aqueous solution were minutely studied. The kinetic studies showed that the pseudo-second order model gave a better description for the uptake process. The negative value of ΔG indicate high feasibility and spontaneity of adsorption. Finally, mesoporous NaZrP-CEX can be regenerated using both of HNO3 (0.05 M) or HCl (1 M) up to seven cycles of operation.

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Kinetics of uranium carbonate leaching process from carbonaceous shale, southwestern Sinai, Egypt

Cited by 11 publications

References 10 publications

Insight on uranium recovery valorization from El Sela highly altered granitic rocks, South Eastern Desert, Egypt

Insight on uranium recovery valorization from El Sela highly altered granitic rocks, South Eastern Desert, Egypt

Hexagonal Cylinder Mesoporous Sorbent for Separation of Uranium Ions from Nitrate Media

Fabrication of Mesoporous NaZrP Cation-Exchanger for U(VI) Ions Separation from Uranyl Leach Liquors

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