▎ 摘　　要

NOVELTY - A waste water treatment material comprises 40-50 pts. wt. polyacrylic acid, 10-20 pts. wt. chitosan, 5-10 pts. wt. hemicellulose, 10-15 pts. wt. hydrotalcite, 5-10 pts. wt. graphene, 5-10 pts. wt. EDTA, 5-18 pts. wt. manganese dioxide, 3-8 pts. wt. crosslinking agent, 0.2-0.6 pt. wt. initiator, 0.3-1 pt. wt. coupling agent, 0.5-2 pts. wt. compatibilizer, 10-15 pts. wt. foaming agent and 1-2 pts. wt. dispersant. USE - The waste water treatment material is used for removing lead-containing waste water. ADVANTAGE - The material has large adsorption capacity. The method is simple and easy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the waste water treatment material comprising uniformly mixing polyacrylic acid, chitosan, hemicellulose and EDTA with water under nitrogen protection conditions to obtain mixture, ltrasonically vibrating hydrotalcite in acid solution, rinsing with water to neutral, calcining at 600-800 degrees C for 3-4 hours, adding hydrotalcite in foaming agent and water mixture, processing at 300-400 degrees C, keeping temperature for 1-2 hours to obtain pre-treated hydrotalcite, uniformly mixing pre-treated hydrotalcite, dispersant and manganese dioxide, ultrasonically dispersing, taking out, adding in reactor, adding mixture, graphene, crosslinking agent, initiator, coupling agent and compatibilizer, uniformly mixing at 80-100 degrees C, stirring and reacting for 0.8-1.5 hours to obtain pre-treated waste water treatment material, placing into sealed reactor, controlling temperature at 200-300 degrees C and pressure at 5-10 MPa, instantaneous pressure relief cooling after 8-15 minutes, and repeating operation 3 times.