Due to the high swelling ratio, the use of chitosan-based composites for adsorption of U(VI) from wastewater is limited. To overcome this shortcoming, a novel type of hierarchical porous chitosan-based aerogel (CS-PTA-DMAs) with anti-swelling is successfully prepared via cross-linking chitosan with the cross-linker PTA-DMA, which is synthesized by p-phthalaldehyde (PTA) and 3,5-diaminobenzoic acid (DMA). There is no significant volume expansion of the aerogel after soaking in ultrapure water for 1 week, indicating it has good swelling property. In addition, the CS-PTA-DMA aerogel has a high U(VI) adsorption capacity of 160 mg/g (308 K, pH 6). The adsorption behavior of CS-PTA-DMA to U(VI) is coordinate to the pseudo-second-order kinetic model and Freundlich isothermal model, which is spontaneously endothermic. Moreover, the adsorption mechanism is also investigated in details. These findings are crucial for the development of practical application uranium adsorbents.

由于高溶胀比，使用壳聚糖基复合材料从废水中吸附 U(VI) 是有限的。为了克服这一缺点，通过将壳聚糖与交联剂PTA-DMA交联，成功制备了一种新型的具有抗溶胀性的分层多孔壳聚糖基气凝胶（CS-PTA-DMA），该气凝胶由对苯二醛合成。 (PTA) 和 3,5-二氨基苯甲酸 (DMA)。气凝胶在超纯水中浸泡1周后体积没有明显膨胀，表明其具有良好的溶胀性能。此外，CS-PTA-DMA 气凝胶具有 160 mg/g（308 K，pH 6）的高 U(VI) 吸附容量。CS-PTA-DMA 对 U(VI) 的吸附行为与自发吸热的拟二级动力学模型和 Freundlich 等温模型相协调。而且，吸附机理也进行了详细研究。这些发现对于实际应用铀吸附剂的开发至关重要。