Study of the fluorine adsorption onto zirconium oxide deposited strong alkaline anion exchange fiber

A kind of adsorbent, strong alkaline anion exchange fiber loaded with zirconium strong alkaline anion exchange fiber (Zr@SAAEF) was prepared. Zr(IV) was uniformly distributed on SAAEF through chemical bonds and physical deposition. Zr@SAAEF has a decent effect on the removal of fluorine in water and scanning electron microscopy images and Fourier transform infrared spectroscopy spectrum showed that the Zr(IV) was successfully loaded on the fiber by chemical bonding. The average adsorption capacity of fluorine was 28.14 mg/g with pH ranging from 5.0 to 8.9, when fluorine solution (100 mg/L) was adsorbed by 0.1 g SAAEF, and the extent of removal exceed 96% when the adsorbent dose was 0.3 g. The adsorption isotherms were well fitted with Langmuir equation, and the maximum adsorption capacities calculated by Langmuir equation were close to the experiment results. The adsorption was an endothermic reaction. These results implied that fluorine adsorption onto Zr@SAAEF belonged to chemical adsorption using monolayer coverage on surface of the fiber. The adsorption kinetics of fluorine onto Zr@SAAEF could be described by pseudo-second-order rate mode. Zr@SAAEF showed a decent ability for fluorine removal from aqueous solution.