The Hummer process is applied to generate graphene oxide from carbon stocks’ discharged Zn-C batteries waste. SiO₂ is produced from rice husks through the wet process. Subsequently, SiO₂ reacted with graphene oxide to form silica/graphene oxide (SiO₂/GO) as a sorbent material. XRD, BET, SEM, EDX, and FTIR were employed to characterize SiO₂/GO. Factors affecting U(VI) sorption on SiO₂/GO, including pH, sorption time, a dosage of SiO₂/GO, U(VI) ions’ concentration, and temperature, were considered. The experimental data consequences indicated that the uptake capacity of SiO₂/GO towards U(VI) is 145.0 mg/g at a pH value of 4.0. The kinetic calculations match the pseudo second-order model quite well. Moreover, the sorption isotherm is consistent with the Langmuir model. The sorption procedures occur spontaneously and randomly, as well as exothermically. Moreover, SiO₂/GO has essentially regenerated with a 0.8 M H₂SO₄ and 1:50 S:L phase ratio after 60 min of agitation time. Lastly, the sorption and elution were employed in seven cycles to check the persistent usage of SiO₂/GO.

The need to get uranium out of leaching liquid is pushing scientists to come up with new sorbents. This study uses the wet technique to improve the U(VI) sorption properties of ZrO₂/chitosan composite sorbent. To validate the synthesis of ZrO₂/CS composite with Zirconyl-OH, -NH, and -NH₂ for U(VI) binding, XRD, FTIR, SEM, EDX, and BET are used to describe the ZrO₂/chitosan wholly formed. To get El Sela leaching liquid, it used 150 g/L H₂SO₄, 1:4 S:L ratio, 200 rpm agitation speed, four hours of leaching period, and particle size 149–100 µm. In a batch study, the sorption parameters are evaluated at pH 3.5, 50 min of sorbing time, 50 mL of leaching liquid (200 mg/L U(VI)), and 25 °C. The sorption capability is 175 mg/g. Reusing ZrO₂/CS for seven cycles with a slight drop in performance is highly efficient, with U(VI) desorption using 0.8 M acid and 75 min of desorption time. The selective U(VI) recovery from El Sela leachate was made possible using ZrO₂/CS. Sodium diuranate was precipitated and yielded a yellow cake with a purity level of 94.88%.

The Nile Valley is a main area for Egyptian phosphorites. The studied samples from the eastern and western sides of the Nile Valley showed similarities in their characteristics, suggesting one depositional basin, but they varied in their uranium content, with averages recorded at 91.7 and 44.83 ppm on the eastern and western sides, respectively. The evidence pointed out that initially the uranium was formed by adsorption onto the iron oxides and organic matter surfaces, then it was partially removed under the effect of groundwater, and the removal was deeper in the western phosphorites than the eastern ones.