▎ 摘　　要

NOVELTY - Removing hexavalent chromium ions in aqueous phase, comprises adjusting pH of chromium-containing wastewater to be treated to ≤ 6, adding carbon nitride/graphene oxide composite airgel as adsorbent to carry out adsorption and removal of hexavalent chromium ions, where the amount of the adsorbent relative to the hexavalent chromium ions in the aqueous phase meets 200 parts per million hexavalent chromium ions per 100 ml, the addition amount of adsorbent is 10-40 mg to complete the removal of the hexavalent chromium ions in the aqueous phase, and the carbon nitride/graphene oxide composite airgel is a three-dimensional structure hydrogel formed by reducing graphene oxide and combining with graphite-type phase carbon nitride. USE - The method is useful for removing hexavalent chromium ions in aqueous phase. ADVANTAGE - The method: has high adsorption rate and fast removal of hexavalent chromium ions.