▎ 摘　　要

NOVELTY - Wastewater adsorbent comprises 2-5 pts. wt. cow dung biochar, 1-2 pts. wt. walnut peel biochar, 1-3 pts. wt. oyster mushroom residue, 1-2 pts. wt. polyanionic cellulose, 2-4 pts. wt. flue ash, 1-3 pts. wt. aluminum oxide, 1-2 pts. wt. lignin (obtained by phenolation and enzymolysis), 1-2 pts. wt. wheat bran, 2-5 pts. wt. modified soy phospholipid, 2-4 pts. wt. Turkey red oil, 3-5 pts. wt. lauroyl glutamic acid, 1-2 pts. wt. lauric acid, 1-2 pts. wt. magnetic graphene, 3-6 pts. wt. polyethylene glycol and 200-250 pts. wt. deionized water. USE - Used as wastewater adsorbent. ADVANTAGE - The adsorbent has good chemical oxygen demand removal effect, ammonia nitrogen compound adsorption effect and high decolorization rate, and removes chromaticity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the adsorbent, comprising (i) mixing cow dung biochar, walnut peel biochar, oyster mushroom residue, polyanionic cellulose, aluminum oxide and wheat bran, placing in a grinder and grinding for 2-5 hours; (ii) sieving via 250 meshes sieve to remove large particles; (iii) adding remaining components and ultrasonically dispersing for 1-2 hours; (iv) placing in water bath and stirring for 300-350 revolutions/minute under rotating speed of 30-32 hours; and (v) centrifuging and separating the precipitate, drying in a vacuum drying box and grinding.