State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Bioresour Technol. 2017 Nov;244(Pt 1):844-849. doi: 10.1016/j.biortech.2017.08.072. Epub 2017 Aug 15.
Bacterial cellulose (BC) is a green biopolymer suitable for heavy metal ion removal from aqueous solution due to its nano-porous microstructure. Polyethyleneimine-bacterial cellulose (PEI-BC) was prepared by reductive amination of dialdehyde BC with polyethyleneimine. The capacity of PEI-BC in Cu(II) and Pb(II) adsorption from aqueous solution was investigated. The adsorption kinetics could be well expressed by pseudo-second-order model and the adsorption isotherm data were well fitted with Freundlich model. Adsorption processes of Cu(II) and Pb(II) by PEI-BC reached equilibrium very rapid in 30 and 60min, respectively. The maximum adsorption capacity of PEI-BC on Cu(II) and Pb(II) was found to be 148 and 141mg/g, respectively, which was higher than that of unmodified BC and other modified BC reported. PEI-BC also showed good reusability in the adsorption of Cu(II) and Pb(II). This study demonstrates that polyethyleneimine modification makes BC a potential bioadsorbent for heavy metal ion removal in waste water.
细菌纤维素（BC）是一种绿色的生物聚合物，由于其纳米多孔的微观结构，适合从水溶液中去除重金属离子。通过将二醛 BC 与聚乙烯亚胺进行还原胺化制备了聚乙烯亚胺-细菌纤维素（PEI-BC）。研究了 PEI-BC 从水溶液中吸附 Cu(II)和 Pb(II)的能力。吸附动力学可以很好地用拟二级模型来表示，吸附等温线数据很好地符合 Freundlich 模型。PEI-BC 对 Cu(II)和 Pb(II)的吸附过程在 30 和 60min 内分别迅速达到平衡。PEI-BC 对 Cu(II)和 Pb(II)的最大吸附容量分别为 148 和 141mg/g，高于未改性的 BC 和其他报道的改性 BC。PEI-BC 在吸附 Cu(II)和 Pb(II)方面也表现出良好的可重复使用性。本研究表明，聚乙烯亚胺改性使 BC 成为一种潜在的生物吸附剂，可用于去除废水中的重金属离子。
