Study of adsorption performance and adsorption mechanism for U(VI) ion on modified polyacrylonitrile fibers
- 4 Downloads
The modified polyacrylonitrile fibers (ACPAN fibers) was synthesized by oximation reaction and alkaline hydrolysis. ACPAN fibers was characterized by means of SEM, FTIR, XPS and elementary analysis. The effects of contact time, solid–liquid ratio, pH, ionic strength, initial concentration and temperature on U(VI) adsorption onto ACPAN fibers was studied and the adsorption mechanism was also discussed. The experimental data fitted well pseudo-second-order kinetics model and Freundlich and D–R models, and thermodynamic process was an endothermic and spontaneous reaction. The maximum adsorption capacity was 163 mg/g, and U(VI) and ACPAN fibers possible formed more stable penta-coordination complexation. This paper highlighted ACPAN fibers as a good adsorbent to remove efficiently and economically uranyl from radioactive wastewater.
KeywordsACPAN fibers Adsorption Uranium
The authors thank to the financial support of the National Natural Science Foundation of China (Nos. 21641003 and 21976074).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no competing interests.
- 8.Rao L (2011) Recent international R&D activities in the extraction of uranium from seawater. Lawrence Berkeley National Laboratory, BerkeleyGoogle Scholar
- 13.Chen ZJ, Huang NH, Liu H (2013) The hydrophilic properties of polyacrylonitrile fiber modified with acrylamide. J Wuhan Text Univ 26(6):32–36Google Scholar
- 24.Wu FC, Tseng RL, Juang RS (2009) Initial behavior of intraparticle diffusion model used in the description of adsorption kinetics. Chem Eng J 153(1):1–8Google Scholar
- 32.Wu ZJ, Liu HN, Zhang HF (2010) Research progress on mechanisms about the effect of ionic strength on adsorption. Environ Chem 29(6):997–1003Google Scholar
- 36.Glasstone S, Laidler KJ, Eryring H (1941) The theory of rate processes. McGraw-Hill, New YorkGoogle Scholar