Environmental microplastics play an important role in the transmission of pollutants due to their complex properties. To remove microplastics from water, a magnetic material CuFe₂O₄ was used to remove microplastics with different photoaging degrees, which has the advantage of being fast and efficient. CuFe₂O₄ had an excellent characteristic in the removal of polystyrene microplastics and its superparamagnetic nature ensured its magnetic recovery. When the dosage of CuFe₂O₄ was 0.2 g L⁻¹, the removal efficiencies of 98.02, 94.07 and 96.93% could be achieved for the pristine, aged 36 h and aged 84 h polystyrene microplastics (PSMP) with initial concentration of 0.04 g L⁻¹, respectively. In addition, the high removal efficiency was also achieved in actual water. The impacts of different environmental factors on the removal efficiency were in the order of dissolved organic pollutants > pH > salt ion concentration. Hydrogen bonding played a key role in the removal of pristine polystyrene microplastics and the destruction of C = O by Fe-OOH also played an important role in the removal of aged polystyrene microplastics. Pyrolysis at 500 °C of 4 h can regenerate it, and the removal efficiency for PSMP can still reach 83.88% after four times of reuse.

环境微塑料由于其复杂的特性，在污染物的传输中起着重要作用。为了去除水中的微塑料，采用磁性材料CuFe ₂ O ₄去除不同光老化程度的微塑料，具有快速高效的优点。CuFe ₂ O ₄在去除聚苯乙烯微塑料方面具有优异的特性，其超顺磁性确保了其磁性恢复。_{当CuFe 2} O ₄的用量为0.2 g L ^{−1，初始浓度为0.04 g L -1}的原始、老化36 h和老化84 h的聚苯乙烯微塑料（PSMP）的去除效率分别为98.02%、94.07%和96.93% 。此外，在实际水中也实现了高去除效率。不同环境因素对去除率的影响顺序为溶解性有机污染物＞pH值＞盐离子浓度。氢键在去除原始聚苯乙烯微塑料中起着关键作用，而 Fe-OOH 对 C = O 的破坏在去除老化聚苯乙烯微塑料中也起着重要作用。500℃热解4h可再生，重复使用4次后对PSMP的去除率仍可达到83.88%。