▎ 摘　　要

NOVELTY - Treating wastewater containing chromium (VI) comprises (i) adding ferrous sulfate into dispersed graphene oxide, ultrasonically dispersing at room temperature, reacting in a water bath at 85-95 degrees C for 6-8 hours to obtain an iron hydroxide/graphene oxide hydrogel, (ii) adding 10 mg dried iron oxyhydroxide/graphene oxide hydrogel into a glass bottle containing wastewater chromium (VI), adsorbing to remove chromium (VI) in waste water of chromium (VI) containing chromium (VI) wastewater, shaking on a constant temperature shaker, reacting for 24 hours, and filtering the wastewater to obtain the treated wastewater, and (iii) desorbing iron oxyhydroxide/graphene oxide hydrogel after for regeneration, immersing in distilled water, repeating step (ii) for the next round of chromium (VI) containing wastewater treatment to remove chromium (VI) from the wastewater and recycling. USE - The method is useful for treating wastewater containing chromium (VI). ADVANTAGE - The method has iron oxyhydroxide/reduced graphene oxide hydrogel, which is synergistically active and avoids agglomeration and loss. DETAILED DESCRIPTION - Treating wastewater containing chromium (VI) comprises (i) adding ferrous sulfate into a dispersed graphene oxide in a mass-volume ratio of 15-30 mg: 1 ml, ultrasonically dispersing at room temperature for 5-10 minutes, reacting in a water bath at 85-95 degrees C for 6-8 hours to obtain an iron oxyhydroxide/graphene oxide hydrogel, where the iron hydroxide/graphene oxide hydrogel has a three-dimensional structure and soaking in distilled water, (ii) adding 10 mg dried iron oxyhydroxide/graphene oxide hydrogel into a glass bottle containing wastewater chromium (VI), adsorbing to remove chromium (VI) in waste water of chromium (VI) containing chromium (VI) wastewater, which is 20 ml, where the mass and volume concentration of chromium (VI) is 5-20 mg/ml, the pH value of the wastewater containing chromium (VI) is 2-6, shaking on a constant temperature shaker, reacting for 24 hours, and filtering the wastewater to obtain the treated wastewater, where the removal rate of chromium (VI) is 87.02-100%, and (iii) desorbing iron oxyhydroxide/graphene oxide hydrogel after adsorption of chromium (VI) in a strong alkaline aqueous solution for regeneration, immersing in distilled water, repeating step (ii) for the next round of chromium (VI) containing wastewater treatment to remove chromium (VI) from the wastewater and recycling.