Adsorptive Removal of \({{\text{UO}}}_{2}^{2+}\) Ions from Aqueous Solutions by Ni(II)/Fe(III)-Layered Double Hydroxides and its Magnetic Nanocomposites

Comparative analysis of the sorption ability of the obtained carbonate forms of layered double hydroxides with different Ni(II)/Fe(III) ratio and their magnetic nanocomposites toward \({{\text{UO}}}_{2}^{2+}\) ions in aqueous solutions is performed. The synergistic effect of magnetic composite sorbents based on layered double hydroxides and magnetite on the removal uranyl ions in a wide pH range (3.5-9.5) is shown. Due to the high efficiency in combination with magnetic solid-phase separation, the obtained adsorption materials are promising for the purification of uranium-containing natural and wastewaters.