Department of Chemistry and Technology of Functional Materials, Faculty of Chemistry, Gdańsk University of Technology, 11/12 Narutowicza Street, 80-233, Gdańsk, Poland.
Department of Chemistry and Technology of Functional Materials, Faculty of Chemistry, Gdańsk University of Technology, 11/12 Narutowicza Street, 80-233, Gdańsk, Poland.
Chemosphere. 2023 Oct;338:139538. doi: 10.1016/j.chemosphere.2023.139538. Epub 2023 Jul 19.
A novel, biomass-derived hybrid sorbent Ban-CD-EPI-Fe was successfully synthesized in a coprecipitation method, in which β-cyclodextrin copolymerized with banana peel extract and epichlorohydrin was grafted onto an iron oxide surface. The composition, presence of functional groups, morphology, thermal stability, and magnetic properties of the obtained material were characterized by Powder X-Ray Diffraction (XRD), X-Ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy and Energy Dispersive X-Ray Spectroscopy (SEM-EDS), Thermogravimetric Analysis (TGA), and Physical Properties Measurement System (PPMS). The material bearing around 28% of β-cyclodextrin units has mesoporous structure with plate-like morphology and active surface area determined by BET and Langmuir models equal to 38.35 and 53.59 m g, respectively. The sorption studies aimed to remove an endocrine disruptor - bisphenol A (BPA), from water. The results showed that the time evolution could be fitted with pseudo-second kinetic order with a rate constant k equal to 0.05 g mg min. According to the Langmuir isotherm, a monolayer is created during BPA sorption, and the maximum sorption capacity was estimated as 93.5 mg g. After BPA sorption, the hybrid material could be easily separated by an external magnet and regenerated under mild conditions keeping its recyclability in at least eight cycles.
一种新型的、源自生物质的混合吸附剂 Ban-CD-EPI-Fe 通过共沉淀法成功合成，其中β-环糊精与香蕉皮提取物和环氧氯丙烷共聚接枝到氧化铁表面。采用粉末 X 射线衍射（XRD）、X 射线光电子能谱（XPS）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜和能量色散 X 射线光谱（SEM-EDS）、热重分析（TGA）和物理性能测量系统（PPMS）对所得材料的组成、官能团的存在、形态、热稳定性和磁性进行了表征。该材料含有约 28%的β-环糊精单元，具有介孔结构，呈片状形态，BET 和 Langmuir 模型确定的比表面积分别为 38.35 和 53.59 m²/g。吸附研究旨在从水中去除内分泌干扰物-双酚 A（BPA）。结果表明，时间演化可以用伪二级动力学方程拟合，速率常数 k 等于 0.05 g mg min。根据 Langmuir 等温线，在 BPA 吸附过程中形成了单层，最大吸附容量估计为 93.5 mg/g。BPA 吸附后，该混合材料可通过外部磁铁轻松分离，并在温和条件下再生，至少可循环使用 8 次。
