由离子液体制备的功能化多孔磁性纤维素/FeO 珠用于从水溶液中去除染料。
Functionalized porous magnetic cellulose/FeO beads prepared from ionic liquid for removal of dyes from aqueous solution.
机构信息
Department of Environment Science and Engineering and Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, North China Electric Power University, Baoding 071003, China; Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada.
Department of Environment Science and Engineering and Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, North China Electric Power University, Baoding 071003, China.
出版信息
Int J Biol Macromol. 2020 Nov 15;163:309-316. doi: 10.1016/j.ijbiomac.2020.06.280. Epub 2020 Jul 3.
Porous magnetic cellulose/FeO beads (CFBs), consisting of cellulose as matrix and ferrosoferric oxide, were successfully fabricated from microcrystalline cellulose dissolved in an ionic liquid and further modified with glutaric anhydride. The porous structure of modified magnetic cellulose/FeO beads (MCFBs) was created by nano-sized calcium carbonate (CaCO). The resulting MCFBs were well characterized and employed as effective adsorbents for removal of dyes from aqueous solution. The adsorption behaviors indicated that the adsorption kinetics was preferably fitted to the pseudo-second-order kinetic model; whereas the adsorption isotherms were well described by Langmuir model with the maximum adsorption capacity of 1186.8 and 151.8 mg/g for methylene blue (MB) and Rhodamine B (RhB), respectively. Moreover, MCFBs are magnetically separable, thus leading to a range of green-based and promising adsorbents towards organic pollutants with easy recovery.
多孔磁性纤维素/FeO 珠（CFB）由纤维素作为基质和四氧化三铁组成，是通过溶解在离子液体中的微晶纤维素制备的，并进一步用戊二酸酐进行改性。改性磁性纤维素/FeO 珠（MCFB）的多孔结构是由纳米碳酸钙（CaCO）形成的。所得 MCFB 经过良好的表征，并用作从水溶液中去除染料的有效吸附剂。吸附行为表明，吸附动力学较好地符合准二级动力学模型；而吸附等温线则较好地用朗缪尔模型描述，对亚甲蓝（MB）和罗丹明 B（RhB）的最大吸附容量分别为 1186.8 和 151.8 mg/g。此外，MCFB 具有磁性分离性，因此成为一系列基于绿色环保的、有前途的吸附剂，可用于去除有机污染物，易于回收。
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