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Synthesis of Fe3O4 magnetic nanoparticles coated with cationic surfactants and their applications in Sb(V) removal from water

文献类型： 外文期刊

作者： Guo, Wenjing 1 ; Fu, Zhiyou 1 ; Zhang, Zhiyong 2 ; Wang, Hao 3 ; Liu, Shasha 1 ; Feng, Weiying 1 ; Zhao, Xiaoli 1 ; Giesy 1 ;

作者机构： 1.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Resource & Environm Sci, Nanjing 210014, Peoples R China

3.Minist Environm Protect, South China Inst Environm Sci, Guangzhou 510655, Peoples R China

4.Univ Saskatchewan, Dept Biomed & Vet Biosci, Saskatoon, SK, Canada

5.Univ Saskatchewan, Toxicol Ctr, Saskatoon, SK, Canada

关键词： Fe3O4; Magnetic nanoparticle; Adsorption; Sb(V); Surfactant

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 710 卷

页码：

收录情况： SCI

摘要： Antimony (Sb) pollution was an emerging environmental risk in several contaminated waters, whereas its removal still presented as a severe challenge due to the lack of efficient adsorbent and its further removal mechanism. In this study, synthesized absorbents, Fe3O4 magnetic nanoparticles (Fe-MNPs) modified and dispersed with commonly used cationic surfactants, were applied to remove Sb contamination in real surface waters, its synthesized conditions, removal performance and mechanism were investigated by using batch experiments and characterization analyses. Optimum conditions on Sb(V) (the dominant form is Sb(OH)(6)(-)) removal by modified adsorbents were obtained as: cetylpyridinium chloride (CPC) coated on Fe-MNPs, mass ratio of Fe-MNPs: CPC = 4:1 and pH = 3-5. Magnetic properties of synthesized adsorbent were not affected, dispersibility was enhanced after fabrication of CPC, that indicated the Fe-MNPs@CPC could be separated and reused with external magnetic field. The adsorption efficiency of this low-cost adsorbent coated with CPC was superior than several traditional adsorbents. The practical application of Fe-MNPs@CPC in five types real waters from the Xikuangshan (XKS) Sb mine area and regeneration experiments by 1 M (mol/L) NaOH solution further confirm its practicability and reusability. Removal experiment results, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR) spectra suggested that electrostatic attraction and surface bonding might responsible for the Sb(V) removal by Fe-MNPs modified with cationic surfactants. (C) 2019 Elsevier B.V. All rights reserved.

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