▎ 摘　　要

NOVELTY - Complex cement-based adsorbing agent comprises 200-240 pts. wt. carboxylated oxidized graphene, 30-60 pts. wt. vitrified microbead, 0.5-0.8 pts. wt. foaming agent, 3-5 pts. wt. water reducing agent, 2-3 pts. wt. air entraining agent, 600-650 pts. wt. cement and 10-18 parts sand. USE - The adsorbing agent useful in adsorbing metal ions in sewage pipeline, waste water treatment pool and industrial waste water. ADVANTAGE - The agent has good mechanical property, high intensity and durability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the adsorbing agent comprising (i) dispersing the carboxylated graphene oxide with water and performing ultrasonic treatment to obtain carboxylated graphene oxide dispersion, (ii) immersing the vitrified microbeads into the carboxylated graphene oxide dispersion for 3 to 5 hours, and stirring at a uniform speed, and taking out the vitrified microbeads in the steaming chamber to obtain the steamed vitrified beads, (iii) mixing sand, cement, steamed vitrified beads, adding air-entraining agent, stirring, adding water-reducing agent to obtain mixed fluid of cement-based material, and (iv) foaming the foaming agent into the mixed fluid, stirring, casting and drying.