Polyamidoxime grafting on ultrahigh-strength cellulose-based jute fabrics for effectively extracting uranium from seawater

Abstract

Uranium resources in the ocean are very rich, and it is an ideal substitute for the increasingly depleted terrestrial uranium mines. Hence, it is urgently needed to develop absorbents simultaneously...

Facile fabrication of a modified polyamide acid porous membrane for uranium enrichment in wastewater

“…The high K d values suggested that the GPAA membranes had good affinity with uranyl ions. 35 Furthermore, to obtain the adsorption capacity, a series of GPAA membranes were separately immersed in aqueous solutions with uranium concentrations varying from 0 to 50 ppm. The adsorption isotherm curve of equilibrium adsorption capacity ( q e ) versus equilibrium concentration ( C e ) was presented (Fig.…”

Adsorbents for the Uranium Capture from Seawater for a Clean Energy Source and Environmental Safety: A Review

“…The multifaceted advancements involve coordination between the uranium and the chelating sites; adsorbent characterization; computer-based ligand simulations, kinetics, and thermodynamic model fittings; and analysis of various parameters including the pH, contact time, adsorbent regeneration, elution efficiency, cost, and environmental sustainability . Recently a bundle of literature emerged from China that covers special metal–organic frameworks, inorganic–organic composites, a graphene oxide/amidoxime hydrogel, − amidoxime functionalized carbon nanofibers, − and ultrahigh molecular weight polyethylene to enhance bulk mechanical robustness. − …”

Polyamidoxime (PAO) granules for solar-enhanced uranium extraction from seawater

“…Many methods are used to convert PAN into PAO, NH 2 OH amidoximation is the most classic method. [27][28][29][30][31] NH 2 OH amidoximation technique includes homogeneous and heterogeneous methods, which were react in organic solvents [31][32][33] and in aqueous solutions, 28,34 respectively. Organic solvents used in the homogeneous method result in environmental pollution and high cost, which dramatically reduces the comprehensive competitiveness of PAO in U(VI) extraction.…”

“…According to the R 2 values in Table S6, † the Langmuir model was more suitable to describe the adsorption process than the Freundlich model, demonstrating that adsorbed U(VI) was chemisorbed and formed a single layer on the KMnO 4 @PAO surface. [26][27][28] Aer the addition of KMnO 4 , the adsorption capacity is signicantly increased. This means that except PAO, the manganese related compounds in KMnO 4 @PAO can also recover U(VI), which can signicantly solidify U(VI) in acidic solutions.…”