Methyl 4-hydroxybenzoate nanospheres anchored on poly(amidoxime)/polyvinyl alcohol hydrogel network with excellent antibacterial activity for efficient uranium extraction from seawater

Uranium and lithium extraction from seawater: challenges and opportunities for a sustainable energy future

“…Specically, the hydrophilic and loose structures of hydrogels aid in the facile migration of uranyl ions into their inner structures, thereby promoting maximal utilization of adsorption sites. 109,110 To further speed up the adsorption process, some researchers have designed MOF/COF-based hydrogels with well-dened porous channels that serve to expose more adsorption sites and expedite the mass transfer of uranyl ions. 112,113 From a practical perspective, besides possessing high adsorption capacities and fast kinetics, a good adsorbent should allow fast desorption of adsorbed uranium to regenerate the adsorption sites.…”

Porous Microparticle Preparation via Tuning Electrostatic Breakup Characteristics of a Non-Newtonian Fluid for High-Performance Uranium Extraction

“…Nevertheless, the manufactured adsorbents are usually in powder form, and complex recovery methods (e.g., centrifugal and membrane separation) are therefore needed, restricting its sustainability and large-scale application. In response to this sustained problem, many adsorbents , have recently been developed, such as graphene oxide/sodium alginate (SA) beads, methyl 4-hydroxybenzoate nanospheres, Fe 3 O 4 @TiO 2 core–shell microspheres, and chitosan–tripolyphosphate beads . However, even if they can be easily recovered by precipitation, the complex manufacturing process and the reduction in specific surface area owing to their millimeter-scale dimensions will somewhat diminish the adsorption efficiency.…”

Regulating the preparation of antibacterial poly(amidoxime) for efficient uranium extraction from seawater

“…Resulting from polyacrylonitrile's (PAN) low cost, good chemical stability, and easy industrial production, numerous adsorbents select it to prepare PAO-based materials for U(VI) recovery. [16][17][18] There are many methods for synthesizing PAO in the laboratory. The classic synthesis method is -CuN amidoximation, which can be divided into homogeneous and heterogeneous processes according to the solvent.…”