Removal of thallium from aqueous solutions using Fe-Mn binary oxides.

Author(s) Li, H.; Chen, Y.; Long, J.; Li, X.; Jiang, D.; Zhang, P.; Qi, J.; Huang, X.; Liu, J.; Xu, R.; Gong, J.
Journal J Hazard Mater
Date Published 2017 Sep 15

In this study, Fe-Mn binary oxides, which harbor the strong oxidative power of manganese dioxide and the high adsorption capacity of iron oxides, were synthesized for Tl(I) removal using a concurrent chemical oxidation and precipitation method. The adsorption of Tl onto the Fe-Mn adsorbent was fast, effective, and selective, with equilibrium sorption reaching over 95% under a broad operating pH (3-12), and high ionic strength (0.1-0.5mol/L). The adsorption can be well fitted with both Langmuir and Freundlich isotherms, and the kinetics can be well described by the pseudo-second-order model. Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) spectra suggest that surface complexation, oxidation and precipitation were the main mechanisms for the removal of Tl. This study shows that the Fe-Mn binary oxides could be a promising adsorbent for Tl removal.

DOI 10.1016/j.jhazmat.2017.05.033
ISSN 1873-3336
Citation J Hazard Mater. 2017;338:296305.

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