Abstract
The removal of copper ions by magnetic Fe3O4/carbon nanotube (CNT) composite adsorbents, prepared by co-precipitation method, in aqueous solution has been investigated. The influence of magnetite loading (35.5‒64.1 wt.%) onto oxidized CNT support on the adsorption capacity and regeneration efficiency is investigated. The adsorption isotherms of Cu2+ ions are well characterized by Langmuir, Freundlich, and Dubinin–Radushkevich models within the temperature range of 303‒323 K. The decoration of magnetic Fe3O4 significantly enhances the removal efficiency, equilibrium rate constant, and adsorption capacity, as analyzed by these models. The appropriate loading of magnetite nanoparticles on the CNT supports not only increases adsorption capacity but also facilitates regeneration efficiency. Accordingly, the Fe3O4/CNT composite can be used as an effective adsorbent for rapid removal of Cu2+ ions from aqueous solution.
Original language | English |
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Pages (from-to) | 56-63 |
Number of pages | 8 |
Journal | Journal of the Taiwan Institute of Chemical Engineers |
Volume | 82 |
DOIs | |
State | Published - 01 2018 |
Bibliographical note
Publisher Copyright:© 2017 Taiwan Institute of Chemical Engineers
Keywords
- Adsorption
- Carbon nanotubes
- Copper ion
- Iron oxide
- Magnetite nanoparticles
- Regeneration efficiency