期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 537, 期 -, 页码 A1-A10出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.11.062
关键词
MgO/carbon; U(VI); Adsorption; Porous structure
资金
- National Natural Science Foundation of China [21477133]
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials
The elimination and safe treatment of U(VI) from radioactive wastewater has attracted widespread attention with the development of the nuclear power industry. In this work, a MgO/carbon adsorbent was successfully prepared by one-step Mg-MOF-74 pyrolyzation and used for U(VI) removal from aqueous solution. Characteristic results indicated that the as-prepared composite was a typical porous structure. The adsorption performance of the MgO/carbon towards U(VI) was studied by batch experiments. The results indicated that the MgO/carbon can rapidly and effectively remove U(VI) and showed an excellent adsorption capacity (777.51 mg/g), which is much higher than other reported adsorbent materials. In addition, the intraparticle diffusion model provides a good explanation for each adsorption process. The adsorption capacity of the MgO/carbon towards U(VI) is greatly promoted by the large specific surface area and well-defined porous structure. Based on the zeta potential and XPS analysis, the possible mechanism for U(VI) removal involved the surface complexation and electrostatic attraction. The results indicate that the MgO/carbon can be regarded as an efficient adsorbent for U(VI) removal from wastewater, which has a very broad application prospect. (C) 2018 Elsevier Inc. All rights reserved.
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