Alatawi Raedah A S
Department of Chemistry, Faculty of Science, University of Tabuk, Tabuk 71421, Saudi Arabia.
Int J Biol Macromol. 2025 Apr;299:140086. doi: 10.1016/j.ijbiomac.2025.140086. Epub 2025 Jan 20.
Dyes can seriously harm human health because they linger or break down in the environment and find their way into drinking water through the water cycle. Examples of the most important interactions between MOFs and dyes are provided, and an effort is made to comprehend how surface charge and size compatibility affect the adsorption process. The methods for incorporating functionalized Ce-MOF into electrospun nanofibers made of polyvinyl alcohol and chitosan to create functionalized cerium metal organic framework nanofiber membranes (FCCP nanofiber membranes) are presented in this paper. A number of techniques, including XRD, FT-IR, N adsorption/desorption isotherm, SEM mapping, and EDX, were used to successfully manufacture and analyze the adsorbent. Examine the effects of pH, adsorbent dose, starting concentration, contact time, and thermodynamics on the adsorption process of malachite green dye (MG) onto FCCP nanofiber membrane. The Langmuir and pseudo-second-order adsorption processes were fitted. The adsorption process was chemisorption, as shown by the adsorption energy of 31.6 kJ/mol. Examine the adsorption mechanism, which may involve electrostatic interaction, pore filling, and π-π interaction. The increase in MG dye absorption at higher temperatures suggests an endothermic and spontaneous adsorption process. For the MG dye solution, the ideal adsorption parameters were determined using the Box-Behnken design software to be pH 8, a dosage of 0.2 g of FCCP nanofiber membrane per 25 mL, and an adsorption capacity of 359.2 mg/g. These elements are necessary for the composite sponge to be utilized in water purification processes and to be the most successful at adsorbing arsenate. Applying the Box-Behnken design and response surface approach features of the Design-Expert software successfully enhanced the adsorption process with a small number of planned tests. The stability of the adsorbent was confirmed by an investigation of its reusability using six consecutive cycles of adsorption and desorption, which revealed no appreciable drop in removal effectiveness. It also demonstrated consistent efficiency, preserved homogeneous XRD data, and kept its original chemical composition both before and after reuse.
染料会严重危害人体健康，因为它们会在环境中残留或分解，并通过水循环进入饮用水中。本文提供了金属有机框架材料（MOFs）与染料之间最重要的相互作用实例，并努力理解表面电荷和尺寸兼容性如何影响吸附过程。本文介绍了将功能化铈基金属有机框架材料（Ce-MOF）掺入由聚乙烯醇和壳聚糖制成的电纺纳米纤维中，以制备功能化铈基金属有机框架纳米纤维膜（FCCP纳米纤维膜）的方法。使用了多种技术，包括X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、氮气吸附/脱附等温线、扫描电子显微镜映射（SEM mapping）和能谱分析（EDX），成功制备并分析了吸附剂。研究了pH值、吸附剂用量、初始浓度、接触时间和热力学对孔雀石绿染料（MG）在FCCP纳米纤维膜上吸附过程的影响。对朗缪尔吸附过程和伪二级吸附过程进行了拟合。吸附能为31.6 kJ/mol，表明吸附过程为化学吸附。研究了吸附机理，其可能涉及静电相互作用、孔隙填充和π-π相互作用。较高温度下MG染料吸附量的增加表明吸附过程是吸热且自发的。对于MG染料溶液，使用Box-Behnken设计软件确定的理想吸附参数为pH值8、每25 mL溶液中FCCP纳米纤维膜用量0.2 g以及吸附容量359.2 mg/g。这些因素对于复合海绵用于水净化过程以及最成功地吸附砷酸盐是必要的。应用Design-Expert软件的Box-Behnken设计和响应面方法特性，通过少量的计划试验成功增强了吸附过程。通过连续六个吸附和解吸循环研究吸附剂的可重复使用性，证实了吸附剂的稳定性，结果表明去除效率没有明显下降。它还表现出一致的效率，保留了均匀的XRD数据，并且在重复使用前后保持了其原始化学成分。
