Polypropylene nonwoven fabric modified with oxime and guanidine for antibiofouling and highly selective uranium recovery from seawater

Ion-imprinted guanidine-functionalized zeolite molecular sieves enhance the adsorption selectivity and antibacterial properties for uranium extraction

“…Several antibacterial materials, including inorganic nanoparticles, small organic agents, and polymers, have been introduced onto the uranium extraction adsorbents. 12,[25][26][27][28] In our previous work, 12,25 inorganic nanoparticles, TiO 2 and ZnO loaded amidoximated wool bers showed good inhibition to the growth of aerobic bacteria, anaerobic bacteria, fungus, and mildew with good uranium adsorption capacity. Moreover, organic groups such as quaternary ammonium derivatives and guanidine derivatives have been employed onto the adsorbents.…”

“…Moreover, organic groups such as quaternary ammonium derivatives and guanidine derivatives have been employed onto the adsorbents. 27,28 Guanidine derivatives are a potential candidate for preparing antibacterial adsorbents because it can maintain protonation in a wide range of pH in polar solvents and destroy the normal metabolism of organisms. 29,30 In this report, zeolite molecular sieves (ZMS-13X) were modied with (3-aminopropyl)triethoxysilane (APTES), and then reacted with cyanamide to obtain guanidine-modied zeolite molecular sieve (ZMS-G).…”

Fabrication and Optimization of the Thermo-Sensitive Hydrogel Carboxymethyl Cellulose/Poly(N-isopropylacrylamide-co-acrylic acid) for U(VI) Removal from Aqueous Solution

“…Three peaks of O1s have been divided, attributing to 530.69 eV for C=O oxygen, 531.88 eV for-C-OH and C-O oxygen, and 533.35 eV for adsorbed H 2 O [42]. The O1s peaks of the carbonyl groups and the hydroxyl groups shifted to low binding energy, which could perhaps be ascribed to the interaction between C=O, -OH, and uranium via the covalent bond [43]. Bonding to UO 2…”

“…Three peaks of O1s have been divided, attributing to 530.69 eV for C=O oxygen, 531.88 eV for-C-OH and C-O oxygen, and 533.35 eV for adsorbed H2O [42]. The O1s peaks of the carbonyl groups and the hydroxyl groups shifted to low binding energy, which could perhaps be ascribed to the interaction between C=O, -OH, and uranium via the covalent bond [43]. Bonding to UO2 2+ would lead to a decrease of the electro-withdrawing ability of oxygen, so as to increase the electron density on the hydrogel, which in turn reduces its binding energy [44].…”

Ion-Imprinted Polypropylene Fibers Fabricated by the Plasma-Mediated Grafting Strategy for Efficient and Selective Adsorption of Cr(VI)

“…The resulted adsorbent exhibited good selectivity and regenerability. Zhang et al prepared surface imprinted PP fibers induced by 60 Co radiation to selectively adsorb uranyl carbonate from the seawater [24,25].…”