Yazdi M G, Ivanic M, Mohamed Alaa, Uheida A
Department of Applied Physics, KTH Royal Institute of Technology Stockholm Sweden
Division for Marine and Environmental Research, Ruder Boskovic Institute Zagreb Croatia.
RSC Adv. 2018 Jul 10;8(43):24588-24598. doi: 10.1039/c8ra02463d. eCollection 2018 Jul 2.
Surface coated magnetite nanoparticles (FeO NPs) with 3-mercaptopropionic acid were immobilized on amidoximated polyacrilonitrile (APAN) nanofibers using electrospinning followed by crosslinking. The prepared composite nanofibers were characterized with Scanning Electron Microscopy (SEM), and Fourier Transform Infrared analysis (FTIR). The composite nanofiber was evaluated for the removal of indigo carmine dye from aqueous solutions. The effects of contact time, initial dye concentration, solution pH and adsorption equilibrium isotherms were studied. The adsorption of indigo carmine was found to be greatly affected by solution pH. The maximum loading capacity was determined to be 154.5 mg g at pH = 5. The experimental kinetic data were fitted well using a pseudo-first order model. The adsorption isotherm studies showed that the adsorption of indigo carmine fits well with the Langmuir model. The reuse of the composite nanofiber was also investigated in which more than 90% of indigo carmine was recovered in 5 min. The results of stability studies showed that the adsorption efficiency can remain almost constant (90%) after five consecutive adsorption/desorption cycles.
采用静电纺丝结合交联的方法，将表面包覆有3-巯基丙酸的磁铁矿纳米颗粒（FeO NPs）固定在偕胺肟化聚丙烯腈（APAN）纳米纤维上。通过扫描电子显微镜（SEM）和傅里叶变换红外分析（FTIR）对制备的复合纳米纤维进行了表征。对复合纳米纤维去除水溶液中靛蓝胭脂红染料的性能进行了评估。研究了接触时间、初始染料浓度、溶液pH值和吸附平衡等温线的影响。发现溶液pH值对靛蓝胭脂红的吸附有很大影响。在pH = 5时，最大负载量确定为154.5 mg/g。实验动力学数据采用准一级模型拟合良好。吸附等温线研究表明，靛蓝胭脂红的吸附符合朗缪尔模型。还研究了复合纳米纤维的重复使用情况，在5分钟内回收了超过90%的靛蓝胭脂红。稳定性研究结果表明，经过五个连续的吸附/解吸循环后，吸附效率几乎可以保持恒定（90%）。
