Abdelaziz Maiar M, Abdelaziz Mahmoud A, Omer Noha, Jame Rasha, Alamri Eman Saad, Mohamed ELsiddig Idriss, Eledum Hussein, Alhuwaiti Asayel Muslam, Al-Balawi Rahmah Saleh, Al-Qarni Ghaida
Department of Mathematics, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia.
Department of Chemistry, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia.
Int J Biol Macromol. 2025 May;307(Pt 3):142232. doi: 10.1016/j.ijbiomac.2025.142232. Epub 2025 Mar 17.
The increasing contamination of water bodies with toxic dyes, particularly methyl orange (MO), has become a significant environmental challenge. In this study, we present an adsorbent, zinc ferrite-loaded hydroxyethyl cellulose/chitosan film (ZnFe₂O₄@HEC/Cs), designed for the efficient removal of MO dye from aqueous solutions. These composites combine the magnetic properties of ZnFe₂O₄ with the biocompatibility of HEC and Cs, forming a robust material with excellent MO dye adsorption capabilities. For comparison, three different concentrations of ZnFe₂O₄ (0.1, 0.2, and 0.3 g) were added to the HEC/Cs solution prior to the film preparations. These prepared films that loaded with the different concentrations of ZnFe₂O₄ were nominated as 1ZnFe₂O₄@HEC/Cs, 2ZnFe₂O₄@HEC/Cs, and 3ZnFe₂O₄@HEC/Cs films and compared with the films (HEC/Cs) that prepared without ZnFe₂O₄ loading. The prepared films (1ZnFe₂O₄@HEC/Cs, 2ZnFe₂O₄@HEC/Cs, and 3ZnFe₂O₄@HEC/Cs) exhibited rough morphological surface. The influence of various parameters such as pH, dye concentration, adsorbent dose, and contact time were systematically explored to optimize the adsorption conditions. Compared to pure HEC/Cs (199 mg/g), the adsorption power of MO dye sequestration in the presence of 3ZnFe₂O₄@HEC/Cs was 288 mg/g. The experimental results are described by chemical kinetics with a pseudo-second order. The Freundlich and Langmuir adsorption models were employed to analyze the experimental results indicating multilayer adsorption of MO dye. The results reveal that the ZnFe₂O₄@HEC/Cs composite demonstrates a rapid adsorption rate and high dye removal efficiency, with the ability to maintain its performance even in the presence of common contaminants. Moreover, the composite can be easily regenerated, offering a sustainable solution for dye removal in wastewater treatment. This study provides valuable insights into designing advanced, environmentally friendly adsorbents to remove dyes from polluted water. The exceptional performance and reusability of ZnFe₂O₄@HEC/Cs films highlight their potential for large-scale wastewater treatment applications.
水体中有毒染料，尤其是甲基橙（MO）的污染日益严重，已成为一项重大的环境挑战。在本研究中，我们展示了一种吸附剂，即负载锌铁氧体的羟乙基纤维素/壳聚糖膜（ZnFe₂O₄@HEC/Cs），其设计目的是从水溶液中高效去除MO染料。这些复合材料将ZnFe₂O₄的磁性与HEC和Cs的生物相容性相结合，形成了一种具有出色MO染料吸附能力的坚固材料。为了进行比较，在制备膜之前，将三种不同浓度的ZnFe₂O₄（0.1、0.2和0.3 g）添加到HEC/Cs溶液中。这些负载不同浓度ZnFe₂O₄的制备膜分别命名为1ZnFe₂O₄@HEC/Cs、2ZnFe₂O₄@HEC/Cs和3ZnFe₂O₄@HEC/Cs膜，并与未负载ZnFe₂O₄的膜（HEC/Cs）进行比较。制备的膜（1ZnFe₂O₄@HEC/Cs、2ZnFe₂O₄@HEC/Cs和3ZnFe₂O₄@HEC/Cs）呈现出粗糙的形态表面。系统地研究了pH、染料浓度、吸附剂剂量和接触时间等各种参数的影响，以优化吸附条件。与纯HEC/Cs（199 mg/g）相比，在3ZnFe₂O₄@HEC/Cs存在下，MO染料螯合的吸附能力为288 mg/g。实验结果用拟二级化学动力学描述。采用Freundlich和Langmuir吸附模型分析实验结果，表明MO染料为多层吸附。结果表明，ZnFe₂O₄@HEC/Cs复合材料具有快速的吸附速率和高的染料去除效率，即使在存在常见污染物的情况下也能保持其性能。此外，该复合材料易于再生，为废水处理中的染料去除提供了一种可持续的解决方案。本研究为设计先进的环保吸附剂以去除污染水中的染料提供了有价值的见解。ZnFe₂O₄@HEC/Cs膜的优异性能和可重复使用性突出了它们在大规模废水处理应用中的潜力。
