PEI imilti-coated PSBF (PEI-M-PSBF) wth high adsorption efficiency and good reusability for Pd(II) recovery was prepared by a PEI multi-coating method. The results of FT-IR and FE-SEM showed that the PEI-M-PSBF was successfully prepared. Batch experiments were conducted to study the adsorption/desorption performance of PEI-M-PSBF to Pd(II). The Langmuir and pseudo-second-order models were well suited for the batch experiment isotherm and kinetic data, respectively. The adsorption capacity of Pd(II) by Langmuir model was 327.14 mg/g, and the initial adsorption rate of 3-PEI-PSBF was 37.19mg/g min. As a resut, the increase in amine groups on the PEI-M-PSBF surface through the PEI multi-coating directly influenced the adsorption amount of the biosorbent. The effects of initial concentration, bed column depth, and flow rate were determined in a column system and the breakthrough curves were detected by Thomas model. In addition, the recycle of the adsorbent was examined by multiple time performing adsorption/desorption cycles up to ten times in a fixed-bed column.

通过PEI多层涂布法制备了PEI氨化的PSBF（PEI-M-PSBF），具有高吸附效率和良好的Pd（II）回收再利用性。FT-IR和FE-SEM结果表明PEI-M-PSBF制备成功。进行分批实验以研究PEI-M-PSBF对Pd（II）的吸附/解吸性能。Langmuir模型和伪二阶模型分别非常适合于批量实验的等温线和动力学数据。Langmuir模型对Pd（II）的吸附容量为327.14 mg / g，3-PEI-PSBF的初始吸附率为37.19mg / g min。结果，通过PEI多层涂层在PEI-M-PSBF表面上胺基的增加直接影响了生物吸附剂的吸附量。初始浓度，床柱深度，在色谱柱系统中确定流量和流速，并通过Thomas模型检测穿透曲线。另外，通过在固定床塔中多次进行多达十次的吸附/解吸循环来检查吸附剂的再循环。