Preparation, characterization, and adsorption properties of magnetic multi-walled carbon nanotubes for simultaneous removal of lead(II) and zinc(II) from aqueous solutions
| Autor: | Li Shujun, Lili Jiang, Xiayan Yao, Xingang Hou, Haitao Yu, Zhou Xiaomeng, Zongshu Zou, Chuantong Li |
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| Rok vydání: | 2015 |
| Předmět: |
Aqueous solution
Materials science Inorganic chemistry Langmuir adsorption model chemistry.chemical_element Ocean Engineering 02 engineering and technology Carbon nanotube Zinc 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Pollution 0104 chemical sciences law.invention symbols.namesake Adsorption X-ray photoelectron spectroscopy chemistry law Transmission electron microscopy symbols Fourier transform infrared spectroscopy 0210 nano-technology Water Science and Technology |
| Zdroj: | Desalination and Water Treatment. 57:18446-18462 |
| ISSN: | 1944-3986 1944-3994 |
| DOI: | 10.1080/19443994.2015.1090924 |
| Popis: | Novel-modified magnetic multi-walled carbon nanotubes (MMWCNTs) were synthesized via evaporating acid purification and co-precipitation method. MMWCNTs were used for simultaneously removing lead and zinc ions from aqueous solutions. Transmission electron microscope, field emission scanning electron microscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy (XPS), and magnetization curve showed the morphology, composition, surface functional groups, and magnetic properties of MMWCNTs. Then, the adsorption effects were investigated by times, pH, and adsorbent dosages. The results showed that Fe3O4 of approximate 10 nm successfully grafted on the surface of MWCNTs. The results of XRD, energy-dispersive X-ray spectroscopy, and XPS further confirmed that the iron oxides were Fe3O4. Adsorption data were analyzed with Lagergren pseudo-first-order, pseudo-second-order kinetic, intraparticle diffusion, and liquid film diffusion models. Langmuir isotherm m... |
| Databáze: | OpenAIRE |
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