Polyethyleneimine/activated carbon paper-based material for low-concentration hexavalent chromium removal

Activated carbon paper-based materials were prepared from softwood pulp, activated powder, and polyester fiber through wet forming process. Then polyethyleneimine was loaded on the using physical impregnation method to fabricate green, low cost, degradable PEI/activated composite adsorbent (PPCA) for removal of Cr(VI) drinking water. The surface characteristics analyzed by SEM, EDX, BET, FT-IR, XPS. It found that maximum adsorption capacity could reach up 1.58 mg g?1 when PEI immersion concentration is 1%, contact time 180 min, temperature 30 °C pH = 2. PPCA conformed both freundlich isotherm model quasi-second-order kinetic model, indicating multi-molecular layer controlled chemical reaction mechanism included electrostatic attraction, redox chelation. Overall, this study provides a large-scalable production way preparation biodegradable efficient water aiding safe management aqueous system.