Surface hydroxylation of SBA-15 via alkaline for efficient amidoxime-functionalization and enhanced uranium adsorption

Preparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI)

“…The development of nuclear energy plays an important role in meeting the energy demand, but the large amount of uranium-containing wastewater generated during the production of the nuclear industry poses a series of problems [3][4][5][6] . In order to achieve the removal and enrichment of U(VI) from uranium-containing wastewater, many technologies have been developed, including chemical precipitation method 7 , ion exchange method 8 , membrane separation method 9 , solvent extraction method 10 and adsorption method 11,12 , etc. Among various technologies, adsorption method has the advantages of low cost, environmental protection and simple operation.…”

Preparation of novel porous Al2O3–SiO2 nanocomposites via solution-freeze-drying-calcination method for the efficient removal of uranium in solution

“…Further, the pseudo-first-order (PFO), pseudo-secondorder (PSO), intraparticle diffusion model and Elovich model were used to simulate the adsorption process of U(VI). The PSO and PFO models were usually used to describe the chemisorption process and physisorption behavior between adsorbate and adsorbent, respectively [56,57]. The intraparticle diffusion model often considered that diffusion direction of molecules was random and the internal diffusion was a adsorption rate-determining step [56].…”

“…The PSO and PFO models were usually used to describe the chemisorption process and physisorption behavior between adsorbate and adsorbent, respectively [56,57]. The intraparticle diffusion model often considered that diffusion direction of molecules was random and the internal diffusion was a adsorption rate-determining step [56]. The Elovich kinetic model assumed that the rate-determining step was the diffusion of the adsorbate [58].…”

Highly selective and ultrafast uptake of uranium from seawater by layered double hydroxide co-intercalated with acetamidoxime and carboxylic anions

“…11,12 The AO contains the functional group of [-C(NH 2 )]]N-OH, in which the amino nitrogen, oxime nitrogen and oxime oxygen are electron donors which easily coordinate with UO 2 2+ , and the amphoteric property ensures effective chelation with U(VI). 13,14 Many types of AOfunctionalized materials have been reported, including carbon-based materials, 15,16 silica-based materials, 17,18 polymers, 19 etc. The poly amidoxime functionalized carbon nanotube (PAO@CNT) with abundant AO groups was synthesized, 20 and due to the coordination of O and N of AO groups with UO 2 2+ , a signicantly enhanced U sorption capacity (q U m ) of 247 mg g À1 was exhibited compared with the CNT precursor (q U m ¼ 32.46 mg g À1 ).…”