Abstract In this study, different generation of poly(amidoamine) (PAMAM) coated magnetic iron oxide nanoparticles were successfully synthesized via divergent growth approach of dendrimer for the removal of nonylphenol (NP) from water. The characterization of synthesized nanoparticles was performed by XRD, FTIR, TEM, FE-SEM, EPX, and VSM. The results suggested that there is a direct correlation between the number of dendrimer generation and its adsorption capacity; however, the rising generation >10 could not enhance NP removal efficiency, significantly. The 10th generation of PAMAM-MNP was modified by 4-aminophenol (MNP-G10-pAP) to enhance its adsorption capacity. The kinetic studies were performed after the determination of optimal adsorption conditions (pH, 7; Detention time, 60 min). It was found that Dubinin–Radushkevich (D–R) isotherm and pseudo-second order model are perfectly stimulated the adsorption behavior and kinetic rate of NP uptake. Furthermore, the NP removal efficiencies of 70, 67, 63 and 65% were observed for distilled water, drinking water, well water and treated wastewater, respectively. Finally, it was revealed that the synthesized product had acceptable reusability in eight times and NP removal efficiency decreased by just 15%.

中文翻译：

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优化的聚（酰胺胺）包覆磁性纳米粒子作为吸附剂去除水中的壬基酚

摘要 本研究通过树枝状大分子的发散生长方法成功合成了不同代聚酰氨基胺（PAMAM）包覆的磁性氧化铁纳米粒子，以去除水中的壬基酚（NP）。通过 XRD、FTIR、TEM、FE-SEM、EPX 和 VSM 对合成的纳米粒子进行表征。结果表明，树枝状大分子的生成数量与其吸附容量之间存在直接相关性；然而，上升代 >10 不能显着提高 NP 去除效率。第10代PAMAM-MNP经4-氨基苯酚（MNP-G10-pAP）修饰以增强其吸附能力。在确定最佳吸附条件（pH，7；滞留时间，60 分钟）后进行动力学研究。发现 Dubinin-Radushkevich (D-R) 等温线和伪二级模型完美地刺激了 NP 吸收的吸附行为和动力学速率。此外，观察到蒸馏水、饮用水、井水和处理过的废水的 NP 去除效率分别为 70%、67%、63% 和 65%。最后，结果表明合成的产品具有可接受的 8 次重复使用率，NP 去除效率仅降低 15%。