Facile one-step fabrication of carboxymethyl cellulose based hydrogel for highly efficient removal of Cr(VI) under mild acidic condition

Carboxymethyl cellulose/polyethylenimine hydrogel (CMC/PEI) was firstly prepared with a facile one-step method to enhance Cr(VI) removal. The sufficient hydrogen ions in double-network structure contributed to a high adsorption capacity for Cr(VI) (6.01 mmol g−1) especially under mild acidic condition (pH 5). Attenuated total reflection-Fourier-transform infrared (ATR-FTIR) spectroscopy in combination with X-ray photoelectron spectroscopy (XPS)...