A tri-functionality magnetic nanoparticles (MNPs) are crucial for environmental remediation. This research focused on the synthesis of pH-catalytic-magnetic polymer beads for dye removal by using phase inversion technique. In 15 wt% of polyethersulfone (PES) polymer possessed the highest porosity (80%) was used in the synthesis of MNPs-PES beads. The methylene blue (MB) removal efficiency of MNPs-PES beads and PES beads was 72.94% and 62.67%, respectively. Similarly, the removal efficiency of methyl orange (MO) dye is higher for MNPs-PES beads (38.56%) compared to PES beads (34.16%). Besides, the removal efficiency for MB dye by MNPs-PES beads increased from 77.59% to 96.90% when solution pH increased from 3 to 9 while removal of MO dye increased from 61.14% to 74.35% when solution pH decreased from 9 to 3. Moreover, the removal efficiency for MB dye increased from 72.94% to 93.43% when H₂O₂ is added. Additionally, MNPs-PES beads were recollected successfully using external magnet. These indirectly proved that the MNPs-PES beads were responsive towards the tri-functionalities of pH-catalytic-magnetic. Lastly, the adsorption of MB dye onto MNPs-PES beads were fitted well to Langmuir isotherm model and pseudo-second-order model with both correlations R² of more than 0.98.

中文翻译：

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新型pH-催化-磁性三官能增强珠在去除有机染料污染物中的应用

三功能磁性纳米粒子（MNP）对于环境修复至关重要。本研究的重点是使用转相技术合成用于染料去除的 pH 催化磁性聚合物珠。15 wt% 的聚醚砜 (PES) 聚合物具有最高的孔隙率 (80%) 用于合成 MNPs-PES 珠。MNPs-PES 珠和 PES 珠的亚甲蓝 (MB) 去除效率分别为 72.94% 和 62.67%。同样，与 PES 珠子 (34.16%) 相比，MNPs-PES 珠子的甲基橙 (MO) 染料去除效率 (38.56%) 更高。此外，当溶液pH值从3增加到9时，MNPs-PES珠对MB染料的去除效率从77.59%提高到96.90%，而当溶液pH值从9降低到3时，MO染料的去除率从61.14%增加到74.35%。 此外。 ,添加₂ O ₂。此外，使用外部磁铁成功回收了 MNPs-PES 珠。这些间接证明了 MNPs-PES 珠对 pH-催化-磁性的三重功能有响应。最后，MB 染料在 MNPs-PES 珠上的吸附与 Langmuir 等温线模型和伪二阶模型非常吻合，两者的相关性 R ²均大于 0.98。