A novel magnetic nanocomposite was successfully synthesized using date palm mesh fiber waste as a sustainable substrate. This green and cost-effective approach produced a nanocomposite characterized by various techniques. The BET-specific surface area and total pore volume of the magnetic nanocomposite were 19.46 m² g⁻¹ and 0.099 m³ g⁻¹, respectively. These values were much higher than those of the raw substrate. The synthesized magnetic nanocomposite was tested as an adsorbent for removing methylene blue (MB organic pollutant) and potassium permanganate (MnO₄⁻ inorganic pollutant) from water. Optimal conditions (adsorbent dosage, pH, temperature, equilibrium time) for removing MB and MnO₄⁻ from water using the magnetic nanocomposite were determined. Under these conditions, the nanocomposite exhibited excellent removal efficiency for MB and MnO₄⁻ with ∼95% and 99%, respectively. The experimental data were best fitted by the Langmuir model and the pseudo-second-order kinetic model for MB and MnO₄⁻ with the highest sorption capabilities of 10.77 and 58.48 mg g⁻¹, respectively. The applicability of the nanocomposite was examined in various real-water samples and satisfactory results were obtained. The magnetic biosorbent showed good reusability, maintaining 81.3% removal efficiency for MB after eleven consecutive adsorption–desorption cycles using ethanol. It is expected that this high-capacity, recyclable magnetic adsorbent can potentially offer a promising, facile, cost-efficient, and eco-friendly route to pollutant water treatment.

中文翻译：

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基于生物质的水净化：一种简单而新颖的一锅法工艺，用于将椰枣网纤维转化为有价值的纳米磁性复合材料，用于水处理


使用枣椰网纤维废料作为可持续基材成功合成了一种新型磁性纳米复合材料。这种绿色且具有成本效益的方法生产了一种以各种技术为特征的纳米复合材料。磁性纳米复合材料的 BET 比表面积和总孔体积分别为 19.46 m^{2 g-1} 和 0.099 m^{3 g-1}。这些值远高于原始基材的值。将合成的磁性纳米复合材料作为吸附剂从水中去除亚甲蓝（MB 有机污染物）和高锰酸钾（MnO₄⁻ 无机污染物）进行测试。确定了使用磁性纳米复合材料从水中去除 MB 和 MnO₄⁻ 的最佳条件 （吸附剂用量、pH、温度、平衡时间）。在这些条件下，纳米复合材料对 MB 和 MnO₄⁻ 表现出优异的去除效率，分别为 ∼95% 和 99%。Langmuir 模型和准二级动力学模型对 MB 和 MnO₄⁻ 的实验数据拟合最好，吸附能力最高，分别为 10.77 和 58.48 mg g⁻¹。在各种实水样品中检查了纳米复合材料的适用性，并获得了令人满意的结果。磁性生物吸附剂具有良好的可重复使用性，在使用乙醇连续 11 次吸附-解吸循环后，MB 的去除效率保持在 81.3%。 预计这种高容量、可回收的磁性吸附剂有可能为污染水处理提供一条有前途、简便、经济高效且环保的途径。