Abstract
Waste paper derived carbon coated with poly(dopamine) ([email protected]) as a novel adsorbent was synthesized successfully by activation of KOH and carbonization of waste A4 paper, followed by in situ polymerization of dopamine. [email protected] composites possessed a 3D hierarchically interconnected porous structure and the Brunauer–Emmett–Teller (BET) specific surface area is calculated to be 364.6 m2/g. The enrichment of uranium for [email protected] composites from not only aqueous solution (mg/L) but also simulated seawater (μg/L) was fully evaluated under different scenarios. The experimental results indicated the maximum absorption capacity to uranium (VI) of [email protected] composites was 384.6 mg/g at pH 7. In addition, the distribution coefficient (Kd) of U (VI) ion with other competing ions for [email protected] composites is 1.97 × 104 mg/L and demonstrated excellent selectivity to uranium (VI) in simulated seawater, which augurs well for the application of the adsorbent in seawater.
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