Department of Surgery, School of Medicine, Kashan University of Medical Sciences, Kashan 8719657891, Iran.
Polymer Research Laboratory, Department of Chemistry, Faculty of Science, University of Maragheh, Maragheh 5518183111, Iran.
Mar Drugs. 2021 Sep 9;19(9):512. doi: 10.3390/md19090512.
The renewable, proteinaceous, marine biopolymer spongin is yet the focus of modern research. The preparation of a magnetic three-dimensional (3D) spongin scaffold with nano-sized FeO cores is reported here for the first time. The formation of this magnetic spongin-FeO composite was characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential thermal analysis (DTA) (TGA-DTA), vibrating sample magnetometer (VSM), Fourier-transform infrared spectroscopy (FTIR), and zeta potential analyses. Field emission scanning electron microscopy (FE-SEM) confirmed the formation of well-dispersed spherical nanoparticles tightly bound to the spongin scaffold. The magnetic spongin-FeO composite showed significant removal efficiency for two cationic dyes (i.e., crystal violet (CV) and methylene blue (MB)). Adsorption experiments revealed that the prepared material is a fast, high-capacity (77 mg/g), yet selective adsorbent for MB. This behavior was attributed to the creation of strong electrostatic interactions between the spongin-FeO and MB or CV, which was reflected by adsorption mechanism evaluations. The adsorption of MB and CV was found to be a function of pH, with maximum removal performance being observed over a wide pH range (pH = 5.5-11). In this work, we combined FeO nanoparticles and spongin scaffold properties into one unique composite, named magnetic spongin scaffold, in our attempt to create a sustainable absorbent for organic wastewater treatment. The appropriative mechanism of adsorption of the cationic dyes on a magnetic 3D spongin scaffold is proposed. Removal of organic dyes and other contaminants is essential to ensure healthy water and prevent various diseases. On the other hand, in many cases, dyes are used as models to demonstrate the adsorption properties of nanostructures. Due to the good absorption properties of magnetic spongin, it can be proposed as a green and uncomplicated adsorbent for the removal of different organic contaminants and, furthermore, as a carrier in drug delivery applications.
可再生的、蛋白质状的海洋生物聚合物海绵仍然是现代研究的焦点。本文首次报道了一种具有纳米级 FeO 核的磁性三维（3D）海绵支架的制备方法。通过 X 射线衍射（XRD）、热重分析（TGA）、差热分析（DTA）（TGA-DTA）、振动样品磁强计（VSM）、傅里叶变换红外光谱（FTIR）和zeta 电位分析对这种磁性海绵-FeO 复合材料的形成进行了表征。场发射扫描电子显微镜（FE-SEM）证实了均匀分散的球形纳米颗粒紧密结合在海绵支架上的形成。磁性海绵-FeO 复合材料对两种阳离子染料（即结晶紫（CV）和亚甲蓝（MB））具有显著的去除效率。吸附实验表明，所制备的材料是一种快速、高容量（77mg/g）、但对 MB 具有选择性的吸附剂。这种行为归因于海绵-FeO 与 MB 或 CV 之间形成的强静电相互作用，这反映在吸附机制评估中。MB 和 CV 的吸附是 pH 的函数，在很宽的 pH 范围内（pH=5.5-11）观察到最大去除性能。在这项工作中，我们将 FeO 纳米粒子和海绵支架的特性结合到一种独特的复合材料中，称为磁性海绵支架，试图为有机废水处理创造一种可持续的吸附剂。提出了阳离子染料在磁性 3D 海绵支架上吸附的适当机制。去除有机染料和其他污染物对于确保健康的水和预防各种疾病至关重要。另一方面，在许多情况下，染料被用作展示纳米结构吸附特性的模型。由于磁性海绵的良好吸收性能，它可以被提议作为一种绿色、简单的吸附剂，用于去除不同的有机污染物，并且可以作为药物输送应用中的载体。
