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 (K_d) 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.

通过KOH的活化和废A4纸的碳化，然后原位聚合多巴胺，成功地合成了废纸衍生的碳，该纸涂覆有聚（多巴胺）（[电子邮件保护]）作为新型吸附剂。[受电子邮件保护]复合材料具有3D层次结构互连的多孔结构，Brunauer-Emmett-Teller（BET）的比表面积经计算为364.6 m ² / g。在不同情况下，不仅从水溶液（mg / L）而且从模拟海水（μg/ L）中对[受电子邮件保护的]复合材料中铀的富集进行了全面评估。实验结果表明，[电子邮件保护的]复合材料在pH值为7时对铀（VI）的最大吸收容量为384.6 mg / g。此外，分配系数（K_d）U [VI]离子与其他受竞争离子形成的[受电子邮件保护的]复合物离子为1.97×10 ⁴  mg / L，并且在模拟海水中对铀（VI）表现出优异的选择性，这很好地说明了吸附剂在海水中的应用。