Polyguanidine-modified adsorbent to enhance marine applicability for 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).…”

Advancing Strategies of Biofouling Control in Water-Treated Polymeric Membranes

“…The mechanism of the antibacterial activities by electrostatic attraction is very difficult to overcome for bacteria unless they change the structural properties of their cell membranes in long-term evolutionary processes. It is also worth noting that guanidines are highly soluble in water, enabling them having a very high acid dissociation constant in water, indicating that guanidine derivatives are better suited for stable electrostatic interaction with the anionic surface of microbes [ 106 , 107 ]. In summary, the guanidine-based polymers are superior to quaternary ammonium groups and have great application potential in antibacterial modification of membrane surfaces.…”

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

“…To understand the practical application of the obtained adsorbent in seawater, Jute-TMC-PAO (10 mg) was employed to [42][43][44][45][46][47][48][49][50] extract uranium in simulated natural seawater using the apparatus shown in Fig. S12 (ESI †), and the model diagram is described in Fig.…”

“…Uranium adsorption result in simulated natural seawater for 14 days (B), inset: Color of the Jute-TMC-PAO fabric before and after uranium adsorption. Comparison of the uranium adsorption amount and adsorption rate of certain representative fibrous adsorbents in real seawater (C) [42][43][44][45][46][47][48][49][50].…”