A rapid and green method for the removal of anionic dyes from aqueous solution using sulfobetaine-modified magnetic nanoparticles
Source abstract
Abstract
A novel and green adsorbent based on sulfobetaine-modified magnetic Fe3O4 nanoparticles (SBMNPs) was successfully synthesized via a convenient one-step chemical coprecipitation method and applied to the removal of the anionic dyes methyl blue (MB) and amaranth (AM) from aqueous solution. The morphology and properties of the SBMNPs were characterized using various methods, including Fourier-transform infrared spectroscopy, X-ray powder diffraction, transmission electron microscopy, and vibrating-sample magnetometry. The obtained SBMNPs were easily dispersible in water and exhibited excellent superparamagnetic behavior. For the adsorption process, four experimental parameters, namely, the solution pH, initial dye concentration, reaction time, and adsorbent dosage, were optimized. The adsorption process was remarkably fast and reached equilibrium within 15 min. The isotherm data were consistent with the Langmuir model, and the maximum adsorption capacities of the SBMNPs were 127.06 mg·g−1 and 57.01 mg·g−1 for MB and AM, respectively, which exceed those reported for other adsorbents. The adsorption kinetics were well fitted by a pseudo-second-order model, which indicated chemical adsorption. Furthermore, the SBMNPs displayed good recyclability, removing 80.92% of MB and 77.49% of AM in the fifth cycle. Owing to their rapid adsorption properties and facile synthesis from green and inexpensive starting materials, the SBMNPs may represent a promising new adsorbent for the removal of anionic dyes from aqueous solution.
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Research context
OpenAlex topics: Adsorption and biosorption for pollutant removal · Nanomaterials for catalytic reactions · Graphene and Nanomaterials Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Basic Medicine, Shanxi Medical University , Taiyuan 030001, P. R. China
Funding
PhD Start-Up Foundation of shanxi medical university · the 331 early career researcher grant of shanxi medical university · the key research and decelopment projects of shanxi province · National Natural Science Foundation of China · Shanxi Province Science Foundation for Youths
References (42)
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