Department of Post-Graduate Studies & Research in Chemistry, Mangalore University, Mangalagangothri 574199 (DK), Karnataka, India.
Department of Post-Graduate Studies & Research in Chemistry, Mangalore University, Mangalagangothri 574199 (DK), Karnataka, India.
Int J Biol Macromol. 2019 Jul 15;133:1051-1062. doi: 10.1016/j.ijbiomac.2019.04.179. Epub 2019 Apr 27.
A novel adsorbent material for removal of metal ion from aqueous solution was made by modification of chitosan. Schiff base prepared from reaction of chitosan with 3-methyl-1-phenyl-5-(piperidin-1-yl)-1H-pyrazole-4-carbaldehyde was crosslinked with epichlorohydrin to form a crosslinked gel. FeO nanoparticles were incorporated into the modified chitosan gel to obtain a magnetic adsorbent material. The magnetic nanocomposite thus obtained 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 capacity of the adsorbent for Cu(II) and Cr(VI) ions was found to be 90.90 and 83.33 mg g respectively. The adsorption data fitted well with Langmuir isotherm model and the 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，是通过壳聚糖的改性制备的。壳聚糖与 3-甲基-1-苯基-5-(哌啶-1-基)-1H-吡唑-4-甲酰醛反应制备的席夫碱与环氧氯丙烷交联形成交联凝胶。将 FeO 纳米颗粒掺入改性壳聚糖凝胶中，得到一种磁性吸附剂材料。采用 FTIR、TGA、SEM、EDS 和 XRD 技术对所得磁性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 90.90 和 83.33mg/g。吸附数据很好地符合 Langmuir 等温线模型和拟二级动力学模型。热力学参数表明吸附是自发和吸热的。解吸研究表明，吸附剂可以有效地回收吸附物，并且可能具有可重复使用性。
