Fig. 1. Schematic diagram of diethyl (2-aminoethyl) phosphonate preparation process

Fig. 2. Schematic diagram of phosphate ester based fiber modification process

Fig. 3. SEM images of UHMWPE (a), (b); UHMWPE-g-GMA (c), (d),; and UHMWPE-g-DEPP (e), (f)

Fig. 4. FTIR spectra (a), XRD patterns (b), TGA patterns (c), and XPS survey spectra (d) of UHMWPE, UHMWPE-g-GMA, UHMWPE-g-DEPP, and U-laden UHMWPE-g-DEPP

Fig. 5. XPS C1s (a), O1s (b), P2p (c), and U4f (d) spectra of UHMWPE, UHMWPE-g-GMA, UHMWPE-g-DEPP and U-laden UHMWPE-g-DEPP

Fig. 6. Effects of pH (a), contact time (b), reaction temperature (c), and lnK_d-1/T (d) on the adsorption of U(VI) on UHMWPE, UHMWPE-g-GMA, and UHMWPE-g-DEPP. m/V = 0.2 g/L. (a) T = 298 K; t= 24 h; (b) pH = 5.0; T = 298 K; (c) pH = 5.0; t = 8 h

Fig. 7. Competitive cation effect (a), adsorption desorption cycle (b), T = 298 K, m/V = 0.2 g/L, pH = 5.0, t = 8 h