Recovery of uranium from ferruginous Shale mineralization from Um Bogma formation, Egypt, via Duolite ES‐467 chelating resin

Abstract

The ferruginous shale iron content (27.5 %) is a serious problem that prevents the separation of uranium. Chemical dissolution of the ferruginous shale from Um Bogma Formation, Egypt, has been studied for the recovery of uranium using the acidic leaching method. Um Bogma representative sample assays 700 ppm of uranium as the element of interest. The effective dissolution parameters such as acid concentrations, solid/liquid addition ratio, leaching time, and leaching temperature were planned to investigate. It was found that The dissolution rate was greatly influenced by the studied dissolution factors. Analysis of the kinetic data showed that the dissolution mechanism is fitted well to shrinking core model within chemical reaction as a rate determining step. It was found that the recorded activation energy (Ea) of uranium dissolution is 205 kJ/mol. The uranium dissolution efficiency of 95.2 % has been achieved with optimized conditions of 250 g/L H2SO4; 1 : 7 (S/L) phase ratio; 250 °C for 7 hours. Finally, the best‐controlling factors were applied for uranium separation from Um Bogma leach liquor to produce a uranium concentrate with 69.985 % uranium purity.

Selective Recovery of Cadmium, Cobalt, and Nickel from Spent Ni–Cd Batteries Using Adogen® 464 and Mesoporous Silica Derivatives

“…This may be due to the greater correlation coefficient ( R 2 = 0.9992) and the maximal sorption capacity at all three temperatures, which are closer to the experimental. The outcomes showed that there was sorption upon a homogenous monolayer surface and that the energy of every metal-binding place is the same [ 74 , 75 , 76 ]. In the Freundlich isotherm, the computed value is 1/ n higher than 1.0 ( Table 5 ), which showed normal adsorption.…”

Separation of Cadmium Using a new Adsorbent of Modified Chitosan with Pyridine Dicarboxyamide derivative and application in different samples

“…The band belonged to nitrogen–hydrogen bond in the 3500–3300 cm −1 there was no discernible interval since it is the same region that is equivalent to the vibration of free OH and NH 2 group in the original chitosan [47] the modified chitosan spectrum, the band associated with C−H bond stretching, which occurs at 2922.9 cm −1 in the spectrum of chitosan, appears at 2913 cm −1 . A broad band in the 1478 cm −1 area has been attributed to the N−C=S group [48–50] …”

“…In most cases, rock samples or wastewater are contaminated with different metal ions, which may interfere with and affect the uptaking efficiency of Cd(II) ions in media [50] . Adsorption or up talking experiments were performed via different concentrations of each interfering ion such as Ni(II), Zn(II), Pb(II), Mn(II), and Cu(II) to research the coexisting ions’ effects on the degree of Cd(II) selectivity (100–500 mg L −1 ).…”

Fabrication of an innovative phosphonate Schiff base adsorbent for molybdenum adsorption and its applications for molybdenum adsorption from spent hydrodesulfurization catalyst

“…The sorption capacity and Langmuir constant can be mathematically determined using the linearized Langmuir model, as shown in Eqn (6). 61,62 C e q e = C e q m + 1…”