Adsorption is one of the most preferred techniques in the advanced treatment of dyeing wastewater. Magnetic porous materials with good adsorption performance, excellent reusability, and a green synthesis route are highly desirable adsorbents in commerce. In this study, we synthesized a magnetic β-cyclodextrin polymer (MNP-CM-CDP) containing many macro- and ultramicropores in aqueous phase. CO₂ adsorption-desorption isotherms and a dye adsorption method provided Langmuir specific surface areas for the MNP-CM-CDP of 114.4 m² g⁻¹ and 153 m² g⁻¹, respectively. Model pollutants (BPA, MB, BO₂, RhB, Cr(III), Pb(II), Zn(II), and Cu(II)) were rapidly and efficiently removed from the aqueous solution by the MNP-CM-CDP. In addition, the polymer could be easily separated from the solution under an external magnetic field. The adsorption of the contaminants was dependent on pH, while the effects of ionic strength and humic acid were slight in the concentration range studied. The polymer could be easily regenerated at room temperature and retained good adsorption performance. Moreover, the MNP-CM-CDP showed good feasibility for the removal of pollutants from actual dyeing wastewater samples.

吸附是印染废水深度处理中最优选的技术之一。具有良好吸附性能，优异的可重复使用性和绿色合成路线的磁性多孔材料是商业上非常需要的吸附剂。在这项研究中，我们合成了磁性β-环糊精聚合物（MNP-CM-CDP），其在水相中包含许多大孔和超孔。CO ₂吸附-解吸等温线和染料吸附方法为MNP-CM-CDP提供的Langmuir比表面积分别为114.4 m ²  g ^-1和153 m ²  g ^-1。模型污染物（BPA，MB，BO ₂MNP-CM-CDP快速，有效地从水溶液中去除了RhB，Cr（III），Pb（II），Zn（II）和Cu（II）。此外，在外部磁场下，聚合物很容易从溶液中分离出来。污染物的吸附取决于pH，而离子强度和腐殖酸在所研究的浓度范围内的影响很小。该聚合物可以在室温下容易地再生并保持良好的吸附性能。此外，MNP-CM-CDP展示了从实际印染废水样品中去除污染物的良好可行性。