Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 338, Issue -, Pages 296-305Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2017.05.033
Keywords
Heavy metal; Thallium; Adsorption; Fe-Mn binary oxide; Oxidation
Categories
Funding
- Foundation for Fostering the Scientific and Technical Innovation of Guangzhou University
- Department of education of Guangdong Province [2015KQNCX115]
- Guangzhou Education Bureau [1201630390]
- Public welfare scientific fund of Environmental Protection Department [201509051]
- Science and Technology Program of Guangzhou [201607010217]
- Educational System Innovation Team Project of Guangzhou Education Bureau [13C02, 13xt02]
- high level university construction project (Regional water environment safety and water ecological protection)
- National Natural Science Foundation of China [41373118, 41573119, 41673110]
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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 TI(I) removal using a concurrent chemical oxidation and precipitation method. The adsorption of TI 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 (0.1-0.5 mol/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 TI. This study shows that the Fe-Mn binary oxides could be a promising adsorbent for TI removal. (C) 2017 Elsevier B.V. All rights reserved.
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