Efficient magnetic capture of PE microplastic from water by PEG modified Fe3O4 nanoparticles:Performance,kinetics,isotherms and influence factors |
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| Affiliation: | 1.College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China;Key Laboratory of Agro-Environment in Downstream of Yangze Plain,Ministry of Agriculture and Rural Affairs,Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China;2.Key Laboratory of Agro-Environment in Downstream of Yangze Plain,Ministry of Agriculture and Rural Affairs,Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China;3.School of Engineering,Newcastle University,Newcastle upon Tyne NE1 7RU,UK;Stantec UK,Newcastle upon Tyne NE1 3DY,UK |
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| Abstract: | 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 Fe3O4 magnetic nanoparticles demonstrated superior adsorption efficiency against polyethylene(PE)microspheres compared to other adsorbents(bare Fe3O4,PEI/Fe3O4 and CA/Fe3O4).The maximum adsorption capacity of PE was found to be 2203 mg/g by adsorption isotherm analysis.PEG/Fe3O4 maintained a high adsorption capacity even at low temperature(5℃,2163 mg/g),while neutral pH was favorable for MP adsorption.The presence of anions(Cl-,SO42-,HCO3,NO3-)and of humic acids inhibited the adsorption of MPs.It is proposed that the adsorption process was mainly driven by intermolecular hy-drogen bonding.Overall,the study demonstrated that PEG/Fe3O4 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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| Keywords: | Microplastic removal Adsorption Magnetic nanoparticles Wastewater Surface modification |
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