An anti-algae adsorbent for uranium extraction: l-Arginine functionalized graphene hydrogel loaded with Ag nanoparticles

Journal of Colloid and Interface Science
Jiahui ZhuJun Wang

Abstract

Uranium (VI) is very essential element in nuclear technique and the enrichment uranium has attracted lots of attention. In this work, l-Arginine and Ag nanoparticles (AgNPs) functionalized reduced graphene oxide ternary hydrogel composites (Ag-l-Arg-rGH) were successfully synthesized, which combined the insertion of AgNPs with one-step thermal reduction and an assembly of graphene oxide nanosheets, using l-Arginine (l-Arg) as both a functional and cross-linking agents. The Ag-l-Arg-rGH composites exhibited great enhanced sorption capacity. Kinetic data best fitted the pseudo-second-order model. The thermodynamic data fitted the Langmuir isotherm model and the calculated maximum adsorption capacity is 434.78 mg/g. In addition, the anti-algae experimental results indicated adsorbent showed marked algal inhibition with the presence of AgNPs in the Ag-l-Arg-rGH composites. In the simulated seawater experiments, The distribution coefficient (Kd) value of uranium(VI) with other competing ions was 2.41 × 104 mL g-1. Thereby, the Ag-l-Arg-rGH composites possessed a promising potential for the enrichment uranium (VI) from nature seawater.

Citations

Jan 20, 2022·ACS Applied Materials & Interfaces·Muhammad Adeel ZafarMohan V Jacob

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