Issue 2, 2017

Recovery of uranium(vi) from aqueous solutions using a modified honeycomb-like porous carbon material

Abstract

Researchers have focused their attention on environment-friendly adsorption materials to solve the energy shortage problem and guarantee the sustainable development of human society. For that matter, pomelo peel, which is a low-cost and universal biomass waste, can be used as an effective carbon source with a large specific surface area. In this paper, a novel composite adsorbent, consisting of a three-dimensional honeycomb-like porous carbon material and MnO2 nanowires (HLPC/MnO2), has been successfully synthesized using alkaline activation followed by a carbonization procedure at high temperatures and in situ growth of MnO2 nanowires. The as-prepared composite was characterized using XRD, FT-IR, XPS, SEM, TEM and BET. The surface area of the HLPC reached 1147.41 m2 gāˆ’1. The results of the adsorption experiments show that the highest adsorption value of the HLPC/MnO2 composite was 238.09 mg-U per g-adsorbent at pH 5. The thermodynamic and kinetic parameters demonstrate that the removal process correlates well with a Langmuir adsorption isotherm model and pseudo-second-order kinetic model. Thus, the HLPC/MnO2 composite is an excellent adsorbent for removing uranium(VI) ions from aqueous solutions.

Graphical abstract: Recovery of uranium(vi) from aqueous solutions using a modified honeycomb-like porous carbon material

Supplementary files

Article information

Article type
Paper
Submitted
15 Aug 2016
Accepted
20 Nov 2016
First published
21 Nov 2016

Dalton Trans., 2017,46, 420-429

Recovery of uranium(VI) from aqueous solutions using a modified honeycomb-like porous carbon material

J. Zhu, Q. Liu, Z. Li, J. Liu, H. Zhang, R. Li, J. Wang and G. A. Emelchenko, Dalton Trans., 2017, 46, 420 DOI: 10.1039/C6DT03227C

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