Abstract A versatile porous adsorbent of sulfonated polystyrene/ferrosoferric oxide/diazoresin (SPS/Fe3O4/DR) nanocomposite microspheres with magnetic property and acidic/basic groups was prepared and applied for removal of different dyes from water. The adsorbent showed good adsorption performance due to its functional groups and strong adsorption forces. The selective removal of methylene blue (MB) from MB/methyl orange (MO) mixture can be realized using this adsorbent. The adsorption uptake capacity of the adsorbents was 223.71 mg/g and the removal efficiency was more than 90% even after five adsorption-desorption cycles. This adsorbent could be readily separated from solution within 2 min using a magnet. Furthermore, adsorption kinetics for SPS/Fe3O4/DR followed by the pseudo-second order model. Isothermal equilibrium data were fitted with Langmuir model, which indicated the adsorption process is the monolayer adsorption. This novel, low cost and high effective adsorbent possesses great potential in environmental pollution cleanup.

中文翻译：

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磺化聚苯乙烯/四氧化三铁/重氮树脂纳米复合微球的合成及应用在高选择性去除染料中

摘要 制备了一种具有磁性和酸性/碱性基团的磺化聚苯乙烯/四氧化四铁/重氮树脂（SPS/Fe3O4/DR）纳米复合微球的多功能多孔吸附剂，用于去除水中的不同染料。由于其官能团和强大的吸附力，吸附剂表现出良好的吸附性能。使用这种吸附剂可以实现从 MB/甲基橙 (MO) 混合物中选择性去除亚甲蓝 (MB)。吸附剂的吸附容量为223.71 mg/g，即使经过5次吸附-解吸循环，去除效率仍超过90%。使用磁铁可以在 2 分钟内轻松地将这种吸附剂从溶液中分离出来。此外，SPS/Fe3O4/DR 的吸附动力学遵循伪二级模型。等温平衡数据符合Langmuir模型，表明吸附过程为单层吸附。这种新型、低成本、高效的吸附剂在环境污染净化方面具有巨大潜力。