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Preparation of diethylenetriamine-modified magnetic chitosan nanoparticles for adsorption of rare-earth metal ions

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Abstract

The separation and reutilization of rare-earth metals are flourishing in numerous advanced technologies, yet the development of a sustainable method to conveniently adsorb rare-earth metal ions remains a challenge waiting for a breakthrough. Chitosan, as a natural and biodegradable material, has been frequently studied to synthesize adsorbents for adsorption of rare-earth metals. In this study, a magnetic bio-adsorbent Fe3O4-C18-chitosan-DETA (FCCD) composite was first prepared via a simple “surface deposition-stepwise grafting” method. The results show that the adsorption capacity of Dy3+, Nd3+, and Er3+ to the as-obtained FCCD is about 28.3, 27.1, and 30.6 mg g−1, respectively, at 25 °C and optimal pH (7.0). The kinetics data followed a pseudo-second-order equation, and the Langmuir equation fitted well to the adsorption isotherms. Subsequently, the as-synthesized adsorbent (FCCD) can be successfully regenerated and recycled for 5 cycles using hydrochloric acid as the eluent. This study develops a promising candidate for practical application in the recovery of rare-earth metal ions owing to its magnetic separation, good acid-resistance, and excellent adsorption capacity.

Graphical abstract: Preparation of diethylenetriamine-modified magnetic chitosan nanoparticles for adsorption of rare-earth metal ions

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Publication details

The article was received on 18 Jun 2017, accepted on 21 Jun 2017 and first published on 21 Jun 2017


Article type: Paper
DOI: 10.1039/C7NJ02177A
Citation: New J. Chem., 2017, Advance Article
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    Preparation of diethylenetriamine-modified magnetic chitosan nanoparticles for adsorption of rare-earth metal ions

    E. Liu, X. Zheng, X. Xu, F. Zhang, E. Liu, Y. Wang, C. Li and Y. Yan, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ02177A

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