In this study, chitosan-polyethyleneimine beads were synthesized via graft copolymerization under microwave irradiation for the adsorption of Acid Red 27 (AR27). The integration of polyethyleneimine affords grafting of amino functional groups onto the chitosan backbone, while crosslinking with glutaraldehyde has significantly improved the mechanical and chemical properties of the resulting grafted and crosslinked chitosan beads (CS-PEI-GLA). The beads were characterized by the scanning electron microscopy, pore structure analysis and Fourier transform infrared spectroscopy. The adsorption experiments were conducted in a batch system and optimized with respect to different adsorbent dosages, pH, initial dye concentrations and contact time. The equilibrium data were well described by the pseudo-second-order kinetic model and the Langmuir isotherm model with the maximum adsorption capacity (q_m) for AR27 of 48.3 mg g⁻¹ at 27 °C. CS-PEI-GLA was successfully synthesized in this study by using a simple, green and cost-effective technique with promising prospects to enable future scale-up.

在这项研究中，壳聚糖-聚乙烯亚胺珠是通过微波辐射下的接枝共聚反应合成的，以吸附酸性红27（AR27）。聚乙烯亚胺的整合提供了氨基官能团的接枝到壳聚糖骨架上，而与戊二醛的交联则显着改善了所得接枝和交联的壳聚糖珠粒（CS-PEI-GLA）的机械和化学性能。通过扫描电子显微镜，孔结构分析和傅立叶变换红外光谱对珠子进行表征。吸附实验在间歇系统中进行，并针对不同的吸附剂剂量，pH，初始染料浓度和接触时间进行了优化。q _m）在27°C下AR4为48.3 mg g ^-1。CS-PEI-GLA是通过使用简单，绿色且具有成本效益的技术在本研究中成功合成的，具有有望在将来扩大规模的前景。