Polyamine-modified polyacrylonitrile fibers for efficient removal of U(VI) from real fluorine-contained low-level radioactive wastewater

It is of great significance to develop an adsorbent with high adsorption capacity and excellent resistance to anion and cation interference toward the removal of U(VI). Herein, a novel polyamine-modified polyacrylonitrile-based fiber (PAN PA ) has been synthesized through hydrothermal method , which can validly remove U(VI) from solution. Combined with mesoscopic, spectral characterization and simulation method, the removal behavior and mechanism of U(VI) from high fluorine uranium-containing wastewater by PAN PA are systematically investigated. The results show that, based on the strong coordination principle of polyamine group and UO 2 2+ , PAN PA can selectively remove U(VI) from wastewater. In addition, the q max of 459.27 mg g −1 was more than that of many other adsorbent materials . More importantly, PAN PA is not affected by high concentration of F − , and exhibits higher distribution coefficient (559,900 mL g −1 ) and removal efficiency (99.5%) to U(VI) than other coexisting ions in real wastewater . Furthermore, the column experiment was also implemented to remove U(VI). The results indicate that PAN PA is a promising material to effectively remove U(VI) from real wastewater produced during the fabrication of nuclear fuel elements .