It is emergent to develop a green waste water adsorbent with high efficiency.Therefore,a type of low-cost,green and environmentally friendly konjac glucomannan(KGM)-silk fibroin(SF)composite aerogels were compounded via simple chemical grafting and vacuum freeze drying,and a study on its adsorption capacity was also conducted.The characterizations of FT-IR,SEM,XRD and DSC indicate that the modified aerogels show a porous network space structure and there is a strong hydrogen bond effect between the KGM and SF molecules,which improves the density,compressive strength and thermal stability of aerogel materials.The adsorption experiments show that KGM-SF aerogels can effectively adsorb the water pollutants Cr(Ⅲ)with a maximal adsorption capacity of 82 mg·g-1.In addition,the adsorption isotherm and dynamic model analysis are used to elaborate the adsorption mechanism of KGM-SF aerogels and explain that the composite aerogels can be single molecule chemisorption.KGM-SF aerogels have potential adsorption capacity.