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Efficient magnetic capture of PE microplastic from water by PEG modified Fe3O4 nanoparticles: Performance, kinetics, isotherms and influence factors

Journal of Environmental Sciences 2023 39 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Shiying He, Yifan Zhang, Yanfang Feng, Shiying He, Jingjing Duan, Shiying He, Yanfang Feng, Yanfang Feng, Yanfang Feng, Ruiqian Liu, Ruiqian Liu, Yanfang Feng, Evangelos Petropoulos, Yanfang Feng, Lihong Xue Evangelos Petropoulos, Lihong Xue Yanfang Feng, Yanfang Feng, Lihong Xue Linzhang Yang, Lihong Xue Linzhang Yang, Yanfang Feng, Lihong Xue Yanfang Feng, Lihong Xue Lihong Xue Lihong Xue Linzhang Yang, Linzhang Yang, Shiying He, Yanfang Feng, Yanfang Feng, Shiying He, Yanfang Feng, Yanfang Feng, Yanfang Feng, Yanfang Feng, Yanfang Feng, Yanfang Feng, Yanfang Feng, Lihong Xue

Summary

Researchers developed PEG-modified Fe3O4 magnetic nanoparticles that efficiently capture polyethylene microplastics from water with a maximum adsorption capacity of 2,203 mg/g, maintaining high removal efficiency across varying environmental conditions.

Polymers

Due to their resistance to degradation, wide distribution, easy diffusion and potential uptake by organisms, microplastics (MPs) pollution has become a major environmental concern. In this study, PEG-modified FeO magnetic nanoparticles demonstrated superior adsorption efficiency against polyethylene (PE) microspheres compared to other adsorbents (bare FeO, PEI/FeO and CA/FeO). The maximum adsorption capacity of PE was found to be 2203 mg/g by adsorption isotherm analysis. PEG/FeO maintained a high adsorption capacity even at low temperature (5°C, 2163 mg/g), while neutral pH was favorable for MP adsorption. The presence of anions (Cl, SO, HCO, NO) and of humic acids inhibited the adsorption of MPs. It is proposed that the adsorption process was mainly driven by intermolecular hydrogen bonding. Overall, the study demonstrated that PEG/FeO can potentially be used as an efficient control against MPs, thus improving the quality of the aquatic environment and of our water resources.

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