Effective removal of water-soluble azo dyes by cubic MgO micromotors
As one of the main dyes in the textile industry, azo dyes have a serious impact on the ecological environment and health through their wastewater discharge. It has become crucial to develop effective methods for removing these substances. Currently, research on micro-nano technology is underway to d...
| Veröffentlicht in: | Environmental technology. - 1993. - 46(2025), 24 vom: 24. Sept., Seite 4831-4841 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Environmental technology |
| Schlagworte: | Journal Article Cubic MgO dynamic adsorption micromotors removal water-soluble azo dye Azo Compounds Water Pollutants, Chemical Magnesium Oxide 3A3U0GI71G mehr... |
| Zusammenfassung: | As one of the main dyes in the textile industry, azo dyes have a serious impact on the ecological environment and health through their wastewater discharge. It has become crucial to develop effective methods for removing these substances. Currently, research on micro-nano technology is underway to develop new micro-nano systems and materials that can rapidly and effectively remove pollutants and heavy metals from water. This study reported the successful preparation of cubic magnesium oxide (MgO) micromotors dynamic nanomaterials through chemical deposition-hydrothermal-ion sputtering and explored the adsorption performance and mechanism of MgO micromotors on methyl orange (MO) azo dye. The surface morphology, composition and motion trajectory of nanomaterials were analysed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), BET automatic specific surface area and pore size analyser, X-ray diffraction (XRD), upright optical microscopy and NIS-Elements software. The MgO micromotors exhibit a mean square displacement of 4.599 μm2 and an average velocity of 3.87 ± 0.54 μm/s in a 6% H2O2 solution, demonstrating their self-propulsion ability in static water. Furthermore, the adsorption capacity of MgO micromotors for MO is significantly enhanced with increasing H2O2 concentration, reaching a removal rate as high as 97.46% at a 6% H2O2 concentration. Fourier transform infrared spectroscopy (FTIR) analysis confirmed that a strong chemical bond (coordinate bond) was formed between the negatively charged anionic azo dye MO and the MgO micromotors which could be hydrolysed to produce easily dissociated magnesium hydroxide (Mg(OH)2) in aqueous solution, resulting in enhanced adsorption properties |
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| Beschreibung: | Date Completed 19.09.2025 Date Revised 19.09.2025 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1479-487X |
| DOI: | 10.1080/09593330.2025.2521042 |