Removal of Hexavalent Chromium from Simulated Wastewater by Polyethylene Glycol–Modified D201 Resin-Supported Nanoscale Zero-Valent Iron

In view of the increasingly prominent heavy metal pollution problem in water, D201 resin-supported polyethylene glycol–modified nanoscale zero-valent iron (PEG-nZVI/D201) was fabricated to remove Cr(VI) wastewater. PEG-nZVI/D201 can overcome agglomeration and oxidation drawbacks nZVI effectively, improve removal efficiency Cr(VI). Its rate 33.6% higher than that bare when dosage 1.0 g·L−1, concentration 50 mg·L−1, initial pH 5.0. The maximum adsorption capacity on reached 134.56 mg·g−1 at 318 K. Langmuir model better describes PEG-nZVI/D201. Thermodynamic parameters show process is spontaneous endothermic. mechanism by as follows: firstly, protonated adsorbs electrostatic attraction, then reduces most Cr(III) through its strong reducibility, finally, form CrXFe1-X(OH)3 co-precipitation with Fe(III) produced nZVI.