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pH-responsive magnetic artificial melanin with tunable aggregation-induced stronger magnetism for rapid remediation of plastic fragments

文献类型： 外文期刊

作者： Chen, Yuange 1 ; Ouyang, Longling 1 ; Liu, Na 1 ; Li, Fang 3 ; Li, Peiyi 1 ; Sun, Mengmeng 1 ; Qin, Haiyang 1 ; Li, Yang 3 ; Xiang, Xueping 4 ; Wu, Lidong 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Beijing 100141, Peoples R China

2.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China

3.Chinese Acad Sci, Shenzhen Inst Adv Technol SIAT, Shenzhen, Peoples R China

4.Zhejiang Univ, Affiliated Hosp 2, Sch Med, Dept Pathol, Hangzhou 310009, Peoples R China

关键词： Magnetic artificial nano-melanin; Rapid removal; Micro-plastics; Nano-plastics; Human health

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：14.224； 五年影响因子：12.984 ）

ISSN： 0304-3894

年卷期： 2022 年 435 卷

页码：

收录情况： SCI

摘要： 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-/microplastics 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.

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