This study involved the utilization of a free radical‐graft copolymerization reaction for the development of a novel adsorbent, namely, poly(butyl methacrylate)‐grafted alginate/Fe₃O₄ nanocomposite (PBMA‐gft‐Alg/Fe₃O₄). Transmission electron microscopy, scanning electron microscopy, energy‐dispersive X‐ray analysis, X‐ray diffraction patterns analysis, and Fourier transform infrared spectroscopy (FT‐IR) were carried out for the characterization of Fe₃O₄ NPs and PBMA‐gft‐Alg/Fe₃O₄ nanocomposites. The capability of nanocomposites and nanoparticles to adsorb dyes such as MG and MB, resulting in their removal from aqueous media, was evaluated under different conditions such as pH, temperature, contact time, and dose of adsorbent. Optimum parameters for adsorption of dyes were found to be pH of 10, 50°C, contact time of 180 min, and 0.2 g of adsorbent. Efficiency of the PBMA‐gft‐Alg/Fe₃O₄ nanocomposite was found to be significantly greater than that of Fe₃O₄ NPs for eliminating the desired dye. Langmuir, Freundlich, Sips, and Temkin models were used for testing the experimental data. Freundlich model was the one that best described the adsorption.

中文翻译：

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聚（甲基丙烯酸丁酯）接枝藻酸盐/ Fe3O4纳米复合材料：合成及其在去除染料中的应用

这项研究涉及利用自由基-接枝共聚反应开发新型吸附剂，即聚（甲基丙烯酸丁酯）接枝的藻酸盐/ Fe ₃ O ₄纳米复合材料（PBMA-gft-Alg / Fe ₃ O ₄）。进行了透射电子显微镜，扫描电子显微镜，能量色散X射线分析，X射线衍射图谱分析和傅立叶变换红外光谱（FT-IR）表征Fe ₃ O ₄ NPs和PBMA-gft-铝/铁₃ O ₄纳米复合材料。在不同条件下（例如pH，温度，接触时间和吸附剂剂量）评估了纳米复合材料和纳米颗粒吸附染料（例如MG和MB）的能力，从而将它们从水性介质中去除。发现染料吸附的最佳参数是pH 10、50°C，接触时间180分钟和0.2 g吸附剂。发现PBMA-gft-Alg / Fe ₃ O ₄纳米复合材料在消除所需染料方面的效率明显高于Fe ₃ O ₄ NP。Langmuir，Freundlich，Sips和Temkin模型用于测试实验数据。Freundlich模型是最能描述吸附的模型。