合成及特性研究——环保型纤维素珠用于从水溶液中去除铜（II）。
Synthesis and characterization of eco-friendly cellulose beads for copper (II) removal from aqueous solutions.
机构信息
Applied Thermodynamic Research Unit UR11ES80, National Engineering School of Gabes, University of Gabes, Avenue Omar Ibn El Khattab, 6029, Gabes, Tunisia.
Department of Chemical and Environmental Engineering, University of Oviedo, C/ Julián Clavería s/n, E-33071, Oviedo, Spain.
出版信息
Environ Sci Pollut Res Int. 2020 Jul;27(19):23447-23463. doi: 10.1007/s11356-018-3812-2. Epub 2019 Jan 3.
In this study, novel cellulose-bead-based biosorbents (CBBAS) were successfully synthesized from almond shell using a simple three-step process: (i) dissolution of bleached almond shell in ionic liquid (1-butyl-3-methylimidazolium chloride), (ii) coagulation of cellulose-ionic liquid solution in water and (iii) freeze-drying. Their morphological, structural and physicochemical properties were thoroughly characterized. These biomaterials exhibited a 3D-macroporous structure with interconnected pores, which provided a high number of adsorption sites. It should be noted that CBBAS biosorbents were efficiently employed for the removal of copper (II) ions from aqueous solutions, showing high adsorption capacity: 128.24 mg g. The biosorption equilibrium data obtained were successfully fitted to the Sips model and the kinetics were suitably described by the pseudo-second-order model. Besides, CBBAS biosorbents can be easily separated from the solution for their subsequent reuse, and thus, they represent a method for the removal of copper (II) from aqueous solutions that is not only eco-friendly but also economical.
在这项研究中，成功地从杏仁壳中合成了新型纤维素珠基生物吸附剂 (CBBAS)，采用了简单的三步法：(i) 在离子液体（1-丁基-3-甲基咪唑氯化物）中溶解漂白杏仁壳，(ii) 将纤维素-离子液体溶液在水中凝结，(iii) 冷冻干燥。对它们的形态、结构和物理化学性质进行了彻底的表征。这些生物材料具有 3D 大孔结构，具有相互连接的孔，提供了大量的吸附位点。值得注意的是，CBBAS 生物吸附剂可有效地用于从水溶液中去除铜 (II) 离子，表现出高吸附容量：128.24 mg g。获得的生物吸附平衡数据成功地拟合到 Sips 模型，动力学则适合用伪二阶模型来描述。此外，CBBAS 生物吸附剂可以很容易地从溶液中分离出来，以便随后重复使用，因此，它们代表了一种从水溶液中去除铜 (II) 的方法，不仅环保而且经济。
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