氧化石墨烯功能化壳聚糖-磁铁矿纳米复合材料用于去除废水中的 Cu(II) 和 Cr(VI)。
Graphene oxide functionalized chitosan-magnetite nanocomposite for removal of Cu(II) and Cr(VI) from waste water.
机构信息
Department of Post-Graduate Studies & Research in Chemistry, Mangalore University, Mangalagangothri, 574199 (DK), Karnataka, India.
Pilot Plant Development and Training Institute, King Mongkut's University of Technology Thonburi, Bangkhuntien-Chaitley Road, Thakam, Bangkok 10150, Thailand.
出版信息
Int J Biol Macromol. 2020 Dec 1;164:4391-4402. doi: 10.1016/j.ijbiomac.2020.09.059. Epub 2020 Sep 12.
A novel adsorbent material for removal of metal ions from aqueous solution was made by modifying chitosan. The schiff base prepared from reaction of chitosan with 3-(p-anisyl)-4-formylsydnone was further functionalized with graphene oxide. Finally FeO nanoparticles were incorporated into the modified chitosan to obtain a novel adsorbent material. The nanocomposite made was characterized using FTIR, TGA, SEM, EDS and XRD techniques and evaluated for adsorptive removal of Cu(II) and Cr(VI) ions from aqueous solutions. The maximum adsorption capacities of the adsorbent for Cu(II) and Cr(VI) ions were found to be 111.11 and 142.85 mgg respectively. The adsorption data fitted well with Langmuir isotherm model and followed pseudo second order kinetic model. Thermodynamic parameters indicated the adsorption to be spontaneous and endothermic. The desorption studies revealed the efficient recovery of adsorbate species and possible reusability of the adsorbent material.
一种新型的吸附剂材料，用于从水溶液中去除金属离子，是通过修饰壳聚糖制成的。壳聚糖与 3-(对茴香基)-4-甲酰基-1,2,3-噻二唑反应制备的席夫碱进一步与氧化石墨烯功能化。最后将 FeO 纳米粒子掺入改性壳聚糖中，得到一种新型的吸附剂材料。采用 FTIR、TGA、SEM、EDS 和 XRD 技术对纳米复合材料进行了表征，并评价了其对水溶液中 Cu(II)和 Cr(VI)离子的吸附去除性能。该吸附剂对 Cu(II)和 Cr(VI)离子的最大吸附容量分别为 111.11 和 142.85 mgg。吸附数据符合朗缪尔等温吸附模型，并遵循拟二级动力学模型。热力学参数表明吸附是自发的和吸热的。解吸研究表明，吸附剂材料对吸附剂的回收效率高，具有良好的可重复使用性。
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