The global occurrence of plastic fragment pollutants in water resources has raised concerns about food safety, drinking water security, and long-term ecological impacts worldwide. The different chemical nature, the persistence, and the smaller size make micro-plastics accumulators for toxins that pose a potential threat to human health. Generally, the smaller the size of the plastic fragments is, the more difficult it is to remove them from the aquatic environment. Methods to remove plastics from water or other media are highly needed. Here, we develop core-shell superparamagnetic melanin nanoparticles, which can put magnetism on nano-/micro-plastics within 30 s and then rapidly remove them from water by applying an external magnetic field. The shell material (artificial nano-melanin) provides simultaneously attractive electrostatic, hydrophobic interaction, and van der Waals' forces to attract nano-/micro-plastics, which plays a key role in the rapid remediation of the plastic fragments. With this principle applied to a simple method, the average removal efficiency achieves 89.3%. We show a method for high-throughput remediation of various micro-plastics with simple materials and processes, which have the potential for rapid, green, and large-scale remediation in the future.

全球水资源中塑料碎片污染物的出现引起了人们对全球食品安全、饮用水安全和长期生态影响的担忧。不同的化学性质、持久性和较小的尺寸使微塑料成为毒素的蓄积器，对人类健康构成潜在威胁。一般来说，塑料碎片的尺寸越小，就越难将它们从水生环境中清除。非常需要从水或其他介质中去除塑料的方法。在这里，我们开发了核壳超顺磁性黑色素纳米粒子，它可以在 30 秒内对纳米/微塑料产生磁性，然后通过施加外部磁场将它们从水中快速去除。外壳材料（人造纳米黑色素）同时提供有吸引力的静电，疏水相互作用和范德华力吸引纳米/微塑料，这在塑料碎片的快速修复中起着关键作用。将此原理应用于简单的方法，平均去除效率达到 89.3%。我们展示了一种用简单的材料和工艺对各种微塑料进行高通量修复的方法，在未来具有快速、绿色和大规模修复的潜力。