Green preparation of Fe3O4/HA/CS magnetic nanoparticles for oil–water separation

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Journal of chemical technology and biotechnology Pub Date : 2024-04-15 DOI:10.1002/jctb.7657

Wei Wu, Xiaoqian Ma, Rui Wang, Dayong Zhang

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Abstract

BACKGROUND

Demulsification using chitosan (CS)-coated magnetic nanomaterials has garnered significant attention. However, traditional methods for synthesizing chitosan (CS)-coated magnetic nanomaterials are often contaminated, laborious, and time-consuming. Moreover, they showed poor demulsification efficiency due to the occupation of free amino groups in CS by crosslinking agents.

RESULTS

CS-coated Fe₃O₄ magnetic nanoparticles (MNPs) were synthesized using humic acid (HA) as a bridge. The Fe₃O₄/HA/CS MNPs are recyclable demulsifiers for hexadecane-water microemulsions. The impacts of MNP dosage, separation time, and pH on demulsification efficiency were studied comprehensively. Compared with Fe₃O₄/HA and Fe₃O₄/CS MNPs, the demulsification efficiency of the Fe₃O₄/HA/CS MNPs was superior. The pseudo-second-order kinetic model and the Sips isotherm best describe the demulsification process. Combined with the influence factors of demulsification efficiency, the demulsification mechanism involves electrostatic interactions between MNPs and oil microparticles. The maximum adsorption capacity for oil by the Fe₃O₄/HA/CS MNPs was 91.73 mg g⁻¹.

CONCLUSION

This research presents a new method for connecting CS to MNPs with a high surface positive charge. As synthesized Fe₃O₄/HA/CS MNPs is expected to serve as highly efficient and recyclable demulsifiers for emulsified oil wastewater. © 2024 Society of Chemical Industry (SCI).

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绿色制备用于油水分离的 Fe3O4/HA/CS 磁性纳米粒子

使用壳聚糖（CS）包覆的磁性纳米材料进行破乳化已引起广泛关注。然而，合成壳聚糖（CS）包覆磁性纳米材料的传统方法往往受到污染，费工费时。此外，由于交联剂占据了壳聚糖中的游离氨基，这些方法的破乳化效率较低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.