Enhanced removal of uranium(VI) from aqueous solution by a novel Mg-MOF-74-derived porous MgO/carbon adsorbent

[Display omitted] 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) remova...

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Published inJournal of colloid and interface science Vol. 537; pp. A1 - A10
Main Authors Lv, Zhimin, Wang, Haiyan, Chen, Changlun, Yang, Shimin, Chen, Lei, Alsaedi, Ahmed, Hayat, Tasawar
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 01.03.2019
Subjects
adsorbents
Adsorption
aqueous solutions
carbon
electrostatic interactions
magnesium oxide
MgO/carbon
nuclear power industry
Porous structure
surface area
U(VI)
uranium
wastewater
X-ray photoelectron spectroscopy
zeta potential
Porous structure
U(VI)
MgO/carbon
Adsorption
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ISSN0021-9797
1095-7103
1095-7103
DOI10.1016/j.jcis.2018.11.062

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Summary:[Display omitted] 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.
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ISSN:0021-9797
1095-7103
1095-7103
DOI:10.1016/j.jcis.2018.11.062