A bacterial cellulose (BC) based adsorbent was prepared by using polyethyleneimine (PEI) using epichlorohydrin as a cross-linker. The physicochemical characterization of the of the developed adsorbent was carried out using FTIR, BET analysis and SEM, respectively. The dye removal efficiency of the adsorbent was assessed towards two anionic model dyes viz. congo red (CR) and reactive red 120(RR). The kinetic data for the removal of both the anionic dyes were fitted better using pseudo-second-order model. Langmuir model describes well the process of adsorption with predicted maximum adsorption capacity (q_max) 515.46 and 300.3 mg L⁻¹ for CR (at pH 6.0) and RR (at pH 3.0) respectively. The adsorption–desorption study showed that PEI-BC adsorbent is effective with more than 90% dye removal efficiency even after four cycles. Furthermore, the bactericidal activity of the adsorbent was analysed using Escherichia coli and Staphylococcus aureus and adsorbent showed good inhibition against both test organisms. The study reveals that PEI-BC adsorbent can be a good candidate for water remediation purpose bearing multifunctional behaviour.

通过使用聚乙烯亚胺 (PEI) 和环氧氯丙烷作为交联剂制备基于细菌纤维素 (BC) 的吸附剂。分别使用 FTIR、BET 分析和 SEM 对开发的吸附剂进行物理化学表征。吸附剂的染料去除效率针对两种阴离子模型染料进行评估，即。刚果红 (CR) 和活性红 120(RR)。使用伪二阶模型更好地拟合去除两种阴离子染料的动力学数据。Langmuir 模型很好地描述了吸附过程，预测最大吸附容量 (q _max ) 515.46 和 300.3 mg L ^-1分别用于 CR（pH 6.0）和 RR（pH 3.0）。吸附-解吸研究表明，即使经过四个循环，PEI-BC 吸附剂仍能有效去除 90% 以上的染料。此外，使用大肠杆菌 和 金黄色葡萄球菌分析了吸附剂的杀菌活性，  并且吸附剂对两种测试生物都显示出良好的抑制作用。该研究表明，PEI-BC 吸附剂可以成为具有多功能行为的水修复目的的良好候选者。