Fig. 1. IR spectra of corn starch and absorbent resin(color online)

Fig. 2. TG curves of corn starch and absorbent resin (color online)

Fig. 3. Water absorbency of absorbent resin with different particle sizes (color online)

Fig. 4. Water absorbency (a) and 0.9% NaCl solution absorbency (b) of absorbent resin at different neutralization degrees

Fig. 5. Water absorbency (a) and 0.9% NaCl solution absorbency (b) of absorbent resin prepared at different absorbed doses

Fig. 6. (a) Picture of soil mixed with absorbent resin after absorbing water; (b) the curve of water absorbency of absorbent resin in soil versus time

Fig. 7. Degradation performance of absorbent resin in soil