Preparation of magnetic ferrite by optimizing the synthetic pH and its application for the removal of Cd(II) from Cd-NH3-H2O system
| Autor: | Aihe Wang, Kanggen Zhou, Quanzhou Chen, Fang Liu, Wei Chen |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Scanning electron microscope Magnetometer Kinetics 0211 other engineering and technologies Analytical chemistry 02 engineering and technology 010501 environmental sciences 01 natural sciences law.invention symbols.namesake Adsorption law Materials Chemistry Physical and Theoretical Chemistry Spectroscopy 0105 earth and related environmental sciences 021110 strategic defence & security studies Aqueous solution Langmuir adsorption model Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials symbols Magnetic nanoparticles Ferrite (magnet) |
| Zdroj: | Journal of Molecular Liquids. 264:215-222 |
| ISSN: | 0167-7322 |
| Popis: | The magnetic ferrite nanoparticles were prepared using ferrous ions in aqueous solutions at various pH values (9, 10, 11 and 12) at 25 °C, labeled F9, F10, F11 and F12. The as-synthesized magnetic nanoparticles were characterized by settling velocity, Fe2+/Fe3+ ratio, laser particles size analyzer, vibrating sample magnetometer, X-ray diffraction and scanning electron microscopy. F9 had a settling velocity of 2% and a saturation magnetization of 82.30 emu/g, suggesting that it can be easily separated from water at a magnetic field. F9 was successfully applied to the adsorption of Cd(II) ions from Cd-NH3-H2O system. The effects of solution pH, contact time and NH3-N concentration were investigated. NH3-N in solution can hinder the adsorption of Cd(II) ions. The adsorption of Cd onto magnetic ferrite nanoparticles followed the pseudo-second order kinetics and the Langmuir isotherm model. The maximum adsorption capacities were 44.13 mg/g for the control group and 40.75 mg/g for the sample group. According to the cost analysis, the magnetic ferrite can be used as a cost-effective adsorbent. |
| Databáze: | OpenAIRE |
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