▎ 摘　　要

NOVELTY - Water treatment agent comprises 60-80 pts. wt. chitosan, 30-40 pts. wt. carrageenan, 10-20 pts. wt. straw, 15-20 pts. wt. graphene, 3-5 pts. wt. titanium dioxide, 1-5 pts. wt. cross-linking agent, 0.1-0.3 pts. wt. initiator, 0.01-0.2 pts. wt. compatilizer, 0.3-1 pts. wt. coupling agent and 200-300 pts. wt. deionized water. USE - Water treatment agent. ADVANTAGE - The water treatment agent has high adsorption, where graphene adsorption straw and titanium dioxide are adhered in the gel pore structure, effectively reduce and chelate heavy metal ion and degradation of organic matter, and absorb peculiar smell molecule, and reaches the sewage discharge standard. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing water treatment agent involves: (A) weighing 60-80 pts. wt. chitosan, 30-40 pts. wt. carrageenan, 10-20 pts. wt. straw, 15-20 pts. wt. graphene, 3-5 pts. wt. titanium dioxide, 1-5 pts. wt. cross-linking agent, 0.1-0.3 pts. wt. initiator, 0.01-0.2 pts. wt. compatilizer, 0.3-1 pts. wt. coupling agent and 200-300 pts. wt. deionized water for later use; (B) soaking the straws in hydrochloric acid for 10-20 minutes, drying in a drying box at the temperature of 80-90 degrees C for 20-30 minutes, and finally crushing to 200-400-mesh powder to obtain straw powder; (C) soaking graphene in acid with the pH value of 2-3 for 10-20 minutes, taking out, draining, and performing heat treatment at the temperature of 600-800 degrees C; (D) mixing the straw powder obtained with the graphene uniformly and subjecting to heat treatment, adding titanium dioxide, compatilizer and coupling agent, and uniformly mixing to obtain mixture; and (E) adding chitosan, carrageenan, cross-linking agent, initiator and deionized water into the mixture obtained, blending, carrying out ultrasonic dispersion for 30-60 minutes, and carrying out stirring reaction for 3-5 hours at a temperature of 50-60 degrees C to obtain water treatment agent.