▎ 摘　　要

NOVELTY - Treatment of chromium-containing wastewater involves using lignin-based composite aerogel as an adsorbent material, forming the lignin-based composite aerogel which is a three-dimensional structural hydrogel by self-assembly of graphene oxide and lignin through a hydrothermal reduction method, adjusting the pH of the chromium-containing wastewater to be treated to pH of 6 or less, adding the lignin-based composite aerogel, 200 ppm hexavalent chromium-ion per 100 mL, where the addition amount of the lignin-based composite aerogel is 10-40 mg, and removing hexavalent chromium-ion in wastewater. USE - Treatment of chromium-containing wastewater. ADVANTAGE - The method enables treatment of chromium-containing wastewater having high adsorption rate and rapid removal of hexavalent chromium-ion.