Improving the adsorption performance with simple and strong applicability has always been a research hotspot in water treatment. This study introduces sodium alginate/MXene/CoFe₂O₄ (SA/MX/CFO) as functional composite materials by sodium alginate cross-linking and as adsorbents in the removal of contaminations with an external magnetic field (MF). SA/MX/CFO beads exhibited excellent mechanical properties, with fracture stress of 1.64 MPa at 73.4%, and an elastic modulus of 2.23 MPa. The isotherm fitting chose Cu²⁺ and CIP as the model pollutants, the isotherm fitting shows that the adsorption capacity of CIP is significantly improved by 24.2%.The magnetic effect of the adsorption capacity of Cu²⁺ is not obvious, which indicated the selectivity for adsorption; however, the adsorption rates of CIP and Cu²⁺ are greatly improved by 359.76% and 371% respectively. Promoting materials transfer rate, changing of hydrogen bond, and surface functional group reactivity is the key to determine the adsorption enhancement with a rotating magnetic field (RMF). The combination of the external magnetic field and the inherent magnetic properties of the adsorbent can adjust the adsorption process and the selectivity of pollutants. It also provides an innovative and practical method for MF to remediate contaminants in the magnetically enhanced adsorption system.

以简单、适用性强的方式提高吸附性能一直是水处理领域的研究热点。本研究通过海藻酸钠交联将海藻酸钠/MXene/CoFe ₂ O ₄ (SA/MX/CFO) 作为功能复合材料引入，并作为吸附剂去除外部磁场 (MF) 的污染物。SA/MX/CFO 珠粒表现出优异的机械性能，在 73.4% 时断裂应力为 1.64 MPa，弹性模量为 2.23 MPa。等温线拟合选择Cu ²⁺和CIP作为模型污染物，等温线拟合表明CIP的吸附量显着提高了24.2%。Cu ²⁺吸附量的磁效应不明显，说明吸附有选择性；而CIP和Cu ²⁺的吸附率分别提高了359.76%和371%。提高材料转移速率、氢键的改变和表面官能团的反应性是确定旋转磁场 (RMF) 吸附增强的关键。外部磁场与吸附剂固有的磁性相结合，可以调节吸附过程和污染物的选择性。它还为MF修复磁增强吸附系统中的污染物提供了一种创新实用的方法。