Selective Adsorption of Uranium (VI) by Calix[6]arene-Modified Magnetic Graphene Oxide

Wei Lu; Le Li; Dexin Ding; Zhongran Dai; Shuangyang Tang; Chen Cao; Ling Liu; D Tuo Chen

doi:10.1166/jnn.2018.16408

Selective Adsorption of Uranium (VI) by Calix[6]arene-Modified Magnetic Graphene Oxide

J Nanosci Nanotechnol. 2018 Dec 1;18(12):8160-8168. doi: 10.1166/jnn.2018.16408.

Authors

Wei Lu¹, Le Li¹, Dexin Ding², Zhongran Dai², Shuangyang Tang³, Chen Cao⁴, Ling Liu¹, D Tuo Chen¹

Affiliations

¹ School of Public Health, University of South China, Hengyang 421001, P. R. China.
² Hunan Province Key Laboratory of Green Development Technology for Extremely Low Grade Uranium Resources, University of South China, Hengyang 421001, P. R. China.
³ Institute of Pathogenic Biology, University of South China, Hengyang 421001, P. R. China.
⁴ School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, P. R. China.

PMID: 30189933
DOI: 10.1166/jnn.2018.16408

Abstract

Magnetic graphene oxide/calix[6]arene (MGO-C6) composites were prepared and then characterized by Fourier transform infrared spectroscopy, Scanning electron microscope, X-ray diffraction and Thermo gravimetric analyzer, the adsorption of U(VI) by MGO-C6 from aqueous solution was investigated as a function of pH, contact time, initial U(VI) concentration and adsorbent dosage. The maximum adsorption rate of MGO-C6 can reach up to 93.21%, which was highly efficient for the removal of U(VI) under the condition of 1 mg/L initial uranium concentration. In addition, the selective adsorption experiment showed that MGO-C6 had an overall preference for U(VI). Adsorption process of MGO-C6 fitted well with the pseudo-second-order kinetic kinetics and the Langmuir isotherm model. The thermodynamic parameters illustrated that the adsorption process was endothermic and spontaneous. This work demonstrated that MGO-C6 was a promising adsorbent for removal of U(VI) from low concentration uranium-containing wastewater.