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- Title
Highly efficient removal of uranium(VI) from aqueous solutions by poly(acrylic acid-co-acrylamide) hydrogels.
- Authors
Wei, Congcong; Yang, Meixia; Guo, Yingyuan; Xu, Wenkai; Gu, Junjie; Ou, Minrui; Xu, Xiaoping
- Abstract
In this study, poly(acrylic acid-co-acrylamide) (PAAAM) hydrogels were used to remove uranium (VI) ions in wastewater and characterized by FTIR, SEM, EDX. The effects of pH value, coexistence of ionic strength, contact time, initial U (VI) ion concentration and adsorption temperature were also studied. Adsorption data fitted well with pseudo-second-order, intra-particle diffusion model and Langmuir isotherm mode, the maximum adsorption capacity of U(VI) was 713.24 mg g−1. Thermodynamic analysis shows that the adsorption of U(VI) is spontaneous endothermic. PAAAM hydrogel has excellent regeneration performance, after five time adsorption–desorption cycles, the adsorbent still maintained 99.24% adsorption capacity.
- Subjects
URANIUM isotopes; EXTRACTION (Chemistry); AQUEOUS solutions; HYDROGELS; URANIUM spectra; LANGMUIR isotherms
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2018, Vol 315, Issue 2, p211
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-017-5653-8