Wei Wei, Wu Houfan, Chen Yuning, Zhong Kunyu, Feng Li
School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China; Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, Hefei 230061, China; Key Laboratory of Water Pollution Control and Wastewater Reuse of Anhui Province, Hefei 230061, China.
School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China.
Int J Biol Macromol. 2023 Jan 31;226:336-344. doi: 10.1016/j.ijbiomac.2022.12.041. Epub 2022 Dec 8.
A new chitosan 2,4-dihydroxyacetophenone Schiff base @SrFeO (Cs-SB@SrFeO) nanocomposite was successfully prepared by one-pot reaction and fully characterized for its functional groups, morphology, elemental analysis and thermal behavior by FT-IR, XRD, VSM, DSC, TGA, zeta potential, FE-SEM and EDS techniques. The VSM result showed that Cs-SB@SrFeO has M of 11.81 emu/g and H of 5488 Oe, known as hard magnetic material. Finally, the as-prepared sample utilized as a new sorbent for the removal of Pb(II) ions from aqueous solution by using batch adsorption experiments. The adsorption of Pb(II) was carried out at different pH, contact time and initial dose of Cs-SB@SrFeO. The maximum adsorption capacity was found to be 132 mg/g (99 %) at pH 5 and the contact time of 120 min. Finally, the kinetic studies reveals that the adsorption process of Cs-SB@SrFeO followed by the pseudo second order kinetics model. Also, the sample showed excellent recyclable efficiency up to 5 cycles.
通过一锅法成功制备了一种新型壳聚糖2,4-二羟基苯乙酮席夫碱@SrFeO（Cs-SB@SrFeO）纳米复合材料，并通过傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、振动样品磁强计（VSM）、差示扫描量热法（DSC）、热重分析（TGA）、zeta电位、场发射扫描电子显微镜（FE-SEM）和能谱分析（EDS）技术对其官能团、形态、元素分析和热行为进行了全面表征。VSM结果表明，Cs-SB@SrFeO的磁矩（M）为11.81 emu/g，矫顽力（H）为5488 Oe，属于硬磁材料。最后，通过批量吸附实验，将所制备的样品用作从水溶液中去除Pb(II)离子的新型吸附剂。在不同的pH值、接触时间和Cs-SB@SrFeO初始用量条件下进行了Pb(II)的吸附实验。发现在pH值为5、接触时间为120分钟时，最大吸附容量为132 mg/g（99%）。最后，动力学研究表明，Cs-SB@SrFeO的吸附过程符合准二级动力学模型。此外，该样品在高达5个循环的情况下表现出优异的可重复利用效率。
