▎ 摘　　要

NOVELTY - Composite adsorbent comprises 20-30 pts. wt. of zeolite, 20-24 pts. wt. of resorcinol, 0.5-0.9 pts. wt. of triphenylphosphine, 8-12 pts. wt. of furfural, 1.0-2.0 pts. wt. of humic acid, 0.8-1.2 pts. wt. of triethylene diamine, 3.0-5.0 pts. wt. of methyl cellulose, 2.0-4.0 pts. wt. of sodium dodecyl sulfate, 3.0-6.0 pts. wt. of graphene/nano-manganese oxide composite and 5.0-10.0 pts. wt. of chitosan/graphene oxide composite material. USE - Composite adsorbent for adsorption of heavy metal ions from sewage. ADVANTAGE - The composite adsorbent has stable structure with large sized aperture good for efficient adsorption of heavy metal ions. The composite adsorbent is prepared in a simple, cost effective, safe and eco-friendly manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing composite adsorbent which involves sintering zeolite at 700 degrees C for 1-2 hours, cooling down to room temperature, crushing sintered zeolite into 200 meshes, mixing resorcinol, triphenyl phosphine, furfural, triethylene diamine, humic acid and deionized water to form a mixed solution, heating mixed solution to 70 degrees C with stirring at 900 rotations/minute for 10 minutes, mixing zeolite powder and methyl cellulose with mixed solution, heating mixture at 60-70 degrees C wit stirring at 1000 rotations/minute for 15 minutes, adding sodium dodecyl sulfate; ultrasonicating mixture at 65-70 degrees C for 30 minutes to obtain an uniformly mixed liquid, preserving mixed liquid at -10 degrees C, irradiating mixed liquid with ultraviolet light to melt frozen gel at 30 degrees C, again refrigerating at -10 degrees C, melting at 25 degrees C to obtain cryogel, using methanol and dimethyl solvent exchange drying gel at 40 degrees C to obtain gel block, mixing graphene/nano-manganese oxide composite and chitosan/graphene oxide composite with distilled water, soaking gel block in the prepared composite mixture for 10-20 minutes, pulverizing composite adsorbent and packaging to obtain desired composite adsorbent.