Composite materials have elicited much interest because of their superior performance in the removal of toxic and radioactive uranyl ions from aqueous solutions. With polyethyleneimine as a functional group, carboxylated chitosan as a matrix, and oxidizing activated carbon as a nanofiller, this study synthesized a novel environment-friendly polyethylenimine-functionalized carboxylated chitosan/oxidized activated charcoal (PCO) biocomposite with a unique three-dimensional porous structure. PCO was synthesized through an easy chemical cross-linking method. Detailed characterization certified the formation of the unique three-dimensional porous structure. The obtained PCO was used to remove uranyl ions from an aqueous solution, demonstrating the maximum adsorption capacity of 450 mg·g⁻¹. The adsorption capacity of PCO decreased by less than 7.51% after five adsorption-desorption cycles. PCO exhibited good adsorption selectivity (K_d = 3.45 × 10⁴ mL·g⁻¹) for uranyl ions. The adsorption mechanism of PCO was also discussed. The material showed good potential for application in the treatment of wastewater containing uranyl ions.

复合材料引起人们极大的兴趣，因为它们在从水溶液中去除有毒的和放射性的铀酰离子方面具有卓越的性能。以聚乙烯亚胺为官能团，羧化壳聚糖为基质，氧化活性炭为纳米填料，本研究合成了一种新型环保的聚乙烯亚胺官能化羧化壳聚糖/氧化活性炭（PCO）生物复合材料，具有独特的三维多孔结构。通过简单的化学交联方法合成了PCO。详细的表征证明了独特的三维多孔结构的形成。所获得的PCO用于从水溶液中去除铀酰离子，显示最大吸附容量为450 mg·g ^-1。经过五个吸附-解吸循环后，PCO的吸附容量下降了不到7.51％。PCO对铀酰离子具有良好的吸附选择性（K _d = 3.45×10 ⁴ mL·g ^-1）。还讨论了PCO的吸附机理。该材料在处理含铀酰离子废水中显示出良好的潜力。